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SkMatrix Reference
===
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< a name = 'SkMatrix' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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class < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > {
< a href = 'SkMatrix_Reference#SkMatrix' > public< / a > :
< a href = 'SkMatrix_Reference#SkMatrix' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > );
< a href = 'undocumented#SkScalar' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scale< / a > );
< a href = 'undocumented#SkScalar' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeTrans' > MakeTrans< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > );
< a href = 'undocumented#SkScalar' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transX< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transY< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers0< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers1< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers2< / a > );
< a href = 'undocumented#SkScalar' > enum< / a > < a href = '#SkMatrix_TypeMask' > TypeMask< / a > {
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< a href = '#SkMatrix_kIdentity_Mask' > kIdentity_Mask< / a > = 0,
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< a href = '#SkMatrix_kTranslate_Mask' > kTranslate_Mask< / a > = 0< a href = '#SkMatrix_kTranslate_Mask' > x01< / a > ,
< a href = '#SkMatrix_kScale_Mask' > kScale_Mask< / a > = 0< a href = '#SkMatrix_kScale_Mask' > x02< / a > ,
< a href = '#SkMatrix_kAffine_Mask' > kAffine_Mask< / a > = 0< a href = '#SkMatrix_kAffine_Mask' > x04< / a > ,
< a href = '#SkMatrix_kPerspective_Mask' > kPerspective_Mask< / a > = 0< a href = '#SkMatrix_kPerspective_Mask' > x08< / a > ,
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};
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< a href = '#SkMatrix_TypeMask' > TypeMask< / a > < a href = '#SkMatrix_getType' > getType< / a > () < a href = '#SkMatrix_getType' > const< / a > ;
< a href = '#SkMatrix_getType' > bool< / a > < a href = '#SkMatrix_isIdentity' > isIdentity< / a > () < a href = '#SkMatrix_isIdentity' > const< / a > ;
< a href = '#SkMatrix_isIdentity' > bool< / a > < a href = '#SkMatrix_isScaleTranslate' > isScaleTranslate< / a > () < a href = '#SkMatrix_isScaleTranslate' > const< / a > ;
< a href = '#SkMatrix_isScaleTranslate' > bool< / a > < a href = '#SkMatrix_isTranslate' > isTranslate< / a > () < a href = '#SkMatrix_isTranslate' > const< / a > ;
< a href = '#SkMatrix_isTranslate' > bool< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > () < a href = '#SkMatrix_rectStaysRect' > const< / a > ;
< a href = '#SkMatrix_rectStaysRect' > bool< / a > < a href = '#SkMatrix_preservesAxisAlignment' > preservesAxisAlignment< / a > () < a href = '#SkMatrix_preservesAxisAlignment' > const< / a > ;
< a href = '#SkMatrix_preservesAxisAlignment' > bool< / a > < a href = '#SkMatrix_hasPerspective' > hasPerspective< / a > () < a href = '#SkMatrix_hasPerspective' > const< / a > ;
< a href = '#SkMatrix_hasPerspective' > bool< / a > < a href = '#SkMatrix_isSimilarity' > isSimilarity< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tol< / a > = < a href = 'undocumented#SK_ScalarNearlyZero' > SK_ScalarNearlyZero< / a > ) < a href = 'undocumented#SK_ScalarNearlyZero' > const< / a > ;
< a href = 'undocumented#SK_ScalarNearlyZero' > bool< / a > < a href = '#SkMatrix_preservesRightAngles' > preservesRightAngles< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tol< / a > = < a href = 'undocumented#SK_ScalarNearlyZero' > SK_ScalarNearlyZero< / a > ) < a href = 'undocumented#SK_ScalarNearlyZero' > const< / a > ;
< a href = 'undocumented#SK_ScalarNearlyZero' > static< / a > < a href = 'undocumented#SK_ScalarNearlyZero' > constexpr< / a > < a href = 'undocumented#SK_ScalarNearlyZero' > int< / a > < a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > = 0;
< a href = '#SkMatrix_kMScaleX' > static< / a > < a href = '#SkMatrix_kMScaleX' > constexpr< / a > < a href = '#SkMatrix_kMScaleX' > int< / a > < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > = 1;
< a href = '#SkMatrix_kMSkewX' > static< / a > < a href = '#SkMatrix_kMSkewX' > constexpr< / a > < a href = '#SkMatrix_kMSkewX' > int< / a > < a href = '#SkMatrix_kMTransX' > kMTransX< / a > = 2;
< a href = '#SkMatrix_kMTransX' > static< / a > < a href = '#SkMatrix_kMTransX' > constexpr< / a > < a href = '#SkMatrix_kMTransX' > int< / a > < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > = 3;
< a href = '#SkMatrix_kMSkewY' > static< / a > < a href = '#SkMatrix_kMSkewY' > constexpr< / a > < a href = '#SkMatrix_kMSkewY' > int< / a > < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > = 4;
< a href = '#SkMatrix_kMScaleY' > static< / a > < a href = '#SkMatrix_kMScaleY' > constexpr< / a > < a href = '#SkMatrix_kMScaleY' > int< / a > < a href = '#SkMatrix_kMTransY' > kMTransY< / a > = 5;
< a href = '#SkMatrix_kMTransY' > static< / a > < a href = '#SkMatrix_kMTransY' > constexpr< / a > < a href = '#SkMatrix_kMTransY' > int< / a > < a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > = 6;
< a href = '#SkMatrix_kMPersp0' > static< / a > < a href = '#SkMatrix_kMPersp0' > constexpr< / a > < a href = '#SkMatrix_kMPersp0' > int< / a > < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > = 7;
< a href = '#SkMatrix_kMPersp1' > static< / a > < a href = '#SkMatrix_kMPersp1' > constexpr< / a > < a href = '#SkMatrix_kMPersp1' > int< / a > < a href = '#SkMatrix_kMPersp2' > kMPersp2< / a > = 8;
< a href = '#SkMatrix_kMPersp2' > static< / a > < a href = '#SkMatrix_kMPersp2' > constexpr< / a > < a href = '#SkMatrix_kMPersp2' > int< / a > < a href = '#SkMatrix_kAScaleX' > kAScaleX< / a > = 0;
< a href = '#SkMatrix_kAScaleX' > static< / a > < a href = '#SkMatrix_kAScaleX' > constexpr< / a > < a href = '#SkMatrix_kAScaleX' > int< / a > < a href = '#SkMatrix_kASkewY' > kASkewY< / a > = 1;
< a href = '#SkMatrix_kASkewY' > static< / a > < a href = '#SkMatrix_kASkewY' > constexpr< / a > < a href = '#SkMatrix_kASkewY' > int< / a > < a href = '#SkMatrix_kASkewX' > kASkewX< / a > = 2;
< a href = '#SkMatrix_kASkewX' > static< / a > < a href = '#SkMatrix_kASkewX' > constexpr< / a > < a href = '#SkMatrix_kASkewX' > int< / a > < a href = '#SkMatrix_kAScaleY' > kAScaleY< / a > = 3;
< a href = '#SkMatrix_kAScaleY' > static< / a > < a href = '#SkMatrix_kAScaleY' > constexpr< / a > < a href = '#SkMatrix_kAScaleY' > int< / a > < a href = '#SkMatrix_kATransX' > kATransX< / a > = 4;
< a href = '#SkMatrix_kATransX' > static< / a > < a href = '#SkMatrix_kATransX' > constexpr< / a > < a href = '#SkMatrix_kATransX' > int< / a > < a href = '#SkMatrix_kATransY' > kATransY< / a > = 5;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > operator< / a > [](< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > get< / a > (< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getScaleX' > getScaleX< / a > () < a href = '#SkMatrix_getScaleX' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getScaleY' > getScaleY< / a > () < a href = '#SkMatrix_getScaleY' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getSkewY' > getSkewY< / a > () < a href = '#SkMatrix_getSkewY' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getSkewX' > getSkewX< / a > () < a href = '#SkMatrix_getSkewX' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getTranslateX' > getTranslateX< / a > () < a href = '#SkMatrix_getTranslateX' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getTranslateY' > getTranslateY< / a > () < a href = '#SkMatrix_getTranslateY' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getPerspX' > getPerspX< / a > () < a href = '#SkMatrix_getPerspX' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getPerspY' > getPerspY< / a > () < a href = '#SkMatrix_getPerspY' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > & < a href = 'undocumented#SkScalar' > operator< / a > [](< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = 'undocumented#SkScalar' > set< / a > (< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > value< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setScaleX' > setScaleX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setScaleY' > setScaleY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setSkewY' > setSkewY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setSkewX' > setSkewX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setTranslateX' > setTranslateX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setPerspX' > setPerspX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setPerspY' > setPerspY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setAll' > setAll< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transX< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transY< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp0< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp1< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp2< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_get9' > get9< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > buffer< / a > [9]) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_set9' > set9< / a > (< a href = '#SkMatrix_set9' > const< / a > < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > buffer< / a > [9]);
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_reset' > reset()< / a > ;
< a href = '#SkMatrix_reset' > void< / a > < a href = '#SkMatrix_setIdentity' > setIdentity< / a > ();
< a href = '#SkMatrix_setIdentity' > void< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > (< a href = '#SkMatrix_setTranslate' > const< / a > < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > & < a href = 'SkPoint_Reference#SkVector' > v< / a > );
< a href = 'SkPoint_Reference#SkVector' > void< / a > < a href = '#SkMatrix_setScale' > setScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setScale' > setScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setSinCos' > setSinCos< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sinValue< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > cosValue< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setSinCos' > setSinCos< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sinValue< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > cosValue< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_setRSXform' > setRSXform< / a > (< a href = '#SkMatrix_setRSXform' > const< / a > < a href = 'undocumented#SkRSXform' > SkRSXform< / a > & < a href = 'undocumented#SkRSXform' > rsxForm< / a > );
< a href = 'undocumented#SkRSXform' > void< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setConcat' > setConcat< / a > (< a href = '#SkMatrix_setConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > void< / a > < a href = '#SkMatrix_preTranslate' > preTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preScale' > preScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preScale' > preScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preRotate' > preRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preRotate' > preRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preSkew' > preSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preSkew' > preSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_preConcat' > preConcat< / a > (< a href = '#SkMatrix_preConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > other< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > void< / a > < a href = '#SkMatrix_postTranslate' > postTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postScale' > postScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postScale' > postScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > );
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_postIDiv' > postIDiv< / a > (< a href = '#SkMatrix_postIDiv' > int< / a > < a href = '#SkMatrix_postIDiv' > divx< / a > , < a href = '#SkMatrix_postIDiv' > int< / a > < a href = '#SkMatrix_postIDiv' > divy< / a > );
< a href = '#SkMatrix_postIDiv' > void< / a > < a href = '#SkMatrix_postRotate' > postRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postRotate' > postRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postSkew' > postSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postSkew' > postSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > );
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_postConcat' > postConcat< / a > (< a href = '#SkMatrix_postConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > other< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > enum< / a > < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > {
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< a href = '#SkMatrix_kFill_ScaleToFit' > kFill_ScaleToFit< / a > ,
< a href = '#SkMatrix_kStart_ScaleToFit' > kStart_ScaleToFit< / a > ,
< a href = '#SkMatrix_kCenter_ScaleToFit' > kCenter_ScaleToFit< / a > ,
< a href = '#SkMatrix_kEnd_ScaleToFit' > kEnd_ScaleToFit< / a > ,
};
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< a href = '#SkMatrix_kEnd_ScaleToFit' > bool< / a > < a href = '#SkMatrix_setRectToRect' > setRectToRect< / a > (< a href = '#SkMatrix_setRectToRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > stf< / a > );
< a href = '#SkMatrix_ScaleToFit' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeRectToRect' > MakeRectToRect< / a > (< a href = '#SkMatrix_MakeRectToRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > stf< / a > );
< a href = '#SkMatrix_ScaleToFit' > bool< / a > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > (< a href = '#SkMatrix_setPolyToPoly' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > src< / a > [], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > );
< a href = 'SkPoint_Reference#SkPoint' > bool< / a > < a href = '#SkMatrix_invert' > invert< / a > (< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > * < a href = 'SkMatrix_Reference#SkMatrix' > inverse< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > ;
< a href = 'SkMatrix_Reference#SkMatrix' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > void< / a > < a href = '#SkMatrix_SetAffineIdentity' > SetAffineIdentity< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6]);
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_asAffine' > asAffine< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6]) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_setAffine' > setAffine< / a > (< a href = '#SkMatrix_setAffine' > const< / a > < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6]);
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > src< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a > ;
< a href = 'SkPoint_Reference#SkPoint' > void< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > pts< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a > ;
< a href = 'SkPoint_Reference#SkPoint' > void< / a > < a href = '#SkMatrix_mapHomogeneousPoints' > mapHomogeneousPoints< / a > (< a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > dst< / a > [], < a href = 'undocumented#SkPoint3' > const< / a > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > src< / a > [], < a href = 'undocumented#SkPoint3' > int< / a > < a href = 'undocumented#SkPoint3' > count< / a > ) < a href = 'undocumented#SkPoint3' > const< / a > ;
< a href = 'undocumented#SkPoint3' > void< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > x< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > , < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > * < a href = 'SkPoint_Reference#SkPoint' > result< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a > ;
< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > x< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > void< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a > (< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > dst< / a > [], < a href = 'SkPoint_Reference#SkVector' > const< / a > < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > src< / a > [], < a href = 'SkPoint_Reference#SkVector' > int< / a > < a href = 'SkPoint_Reference#SkVector' > count< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a > ;
< a href = 'SkPoint_Reference#SkVector' > void< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a > (< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > vecs< / a > [], < a href = 'SkPoint_Reference#SkVector' > int< / a > < a href = 'SkPoint_Reference#SkVector' > count< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a > ;
< a href = 'SkPoint_Reference#SkVector' > void< / a > < a href = '#SkMatrix_mapVector' > mapVector< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > , < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > * < a href = 'SkPoint_Reference#SkVector' > result< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a > ;
< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = '#SkMatrix_mapVector' > mapVector< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a > ;
< a href = 'SkRect_Reference#SkRect' > bool< / a > < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#Rect' > rect< / a > ) < a href = 'SkRect_Reference#Rect' > const< / a > ;
< a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = '#SkMatrix_mapRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a > ;
< a href = 'SkRect_Reference#SkRect' > void< / a > < a href = '#SkMatrix_mapRectToQuad' > mapRectToQuad< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [4], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#Rect' > rect< / a > ) < a href = 'SkRect_Reference#Rect' > const< / a > ;
< a href = 'SkRect_Reference#Rect' > void< / a > < a href = '#SkMatrix_mapRectScaleTranslate' > mapRectScaleTranslate< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_mapRadius' > mapRadius< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > radius< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a > () < a href = '#SkMatrix_isFixedStepInX' > const< / a > ;
< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = '#SkMatrix_fixedStepInX' > fixedStepInX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > ) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_cheapEqualTo' > cheapEqualTo< / a > (< a href = '#SkMatrix_cheapEqualTo' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > m< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > ;
< a href = 'SkMatrix_Reference#SkMatrix' > friend< / a > < a href = 'SkMatrix_Reference#SkMatrix' > bool< / a > < a href = 'SkMatrix_Reference#SkMatrix' > operator< / a > ==(< a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > friend< / a > < a href = 'SkMatrix_Reference#SkMatrix' > bool< / a > < a href = 'SkMatrix_Reference#SkMatrix' > operator< / a > !=(< a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > void< / a > < a href = '#SkMatrix_dump' > dump()< / a > < a href = '#SkMatrix_dump' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getMinScale' > getMinScale< / a > () < a href = '#SkMatrix_getMinScale' > const< / a > ;
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getMaxScale' > getMaxScale< / a > () < a href = '#SkMatrix_getMaxScale' > const< / a > ;
< a href = '#SkMatrix_getMaxScale' > bool< / a > < a href = '#SkMatrix_getMinMaxScales' > getMinMaxScales< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleFactors< / a > [2]) < a href = 'undocumented#SkScalar' > const< / a > ;
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_decomposeScale' > decomposeScale< / a > (< a href = 'undocumented#SkSize' > SkSize< / a > * < a href = 'undocumented#SkSize' > scale< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > * < a href = 'SkMatrix_Reference#SkMatrix' > remaining< / a > = < a href = 'SkMatrix_Reference#SkMatrix' > nullptr< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > ;
< a href = 'SkMatrix_Reference#SkMatrix' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_I' > I< / a > ();
< a href = '#SkMatrix_I' > static< / a > < a href = '#SkMatrix_I' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_InvalidMatrix' > InvalidMatrix< / a > ();
< a href = '#SkMatrix_InvalidMatrix' > static< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_Concat' > Concat< / a > (< a href = '#SkMatrix_Concat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > );
< a href = 'SkMatrix_Reference#SkMatrix' > void< / a > < a href = '#SkMatrix_dirtyMatrixTypeCache' > dirtyMatrixTypeCache< / a > ();
< a href = '#SkMatrix_dirtyMatrixTypeCache' > void< / a > < a href = '#SkMatrix_setScaleTranslate' > setScaleTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ty< / a > );
< a href = 'undocumented#SkScalar' > bool< / a > < a href = '#SkMatrix_isFinite' > isFinite< / a > () < a href = '#SkMatrix_isFinite' > const< / a > ;
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};
< / pre >
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > holds< / a > < a href = 'SkMatrix_Reference#Matrix' > a< / a > 3 < a href = 'SkMatrix_Reference#Matrix' > by< / a > 3 < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > for< / a > < a href = 'SkMatrix_Reference#Matrix' > transforming< / a > < a href = 'SkMatrix_Reference#Matrix' > coordinates< / a > . < a href = 'SkMatrix_Reference#Matrix' > This< / a > < a href = 'SkMatrix_Reference#Matrix' > allows< / a > < a href = 'SkMatrix_Reference#Matrix' > mapping< / a >
< a href = 'SkPoint_Reference#Point' > Points< / a > < a href = 'SkPoint_Reference#Point' > and< / a > < a href = 'SkPoint_Reference#Vector' > Vectors< / a > < a href = 'SkPoint_Reference#Vector' > with< / a > < a href = 'SkPoint_Reference#Vector' > translation< / a > , < a href = 'SkPoint_Reference#Vector' > scaling< / a > , < a href = 'SkPoint_Reference#Vector' > skewing< / a > , < a href = 'SkPoint_Reference#Vector' > rotation< / a > , < a href = 'SkPoint_Reference#Vector' > and< / a >
< a href = 'SkPoint_Reference#Vector' > perspective< / a > .
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > elements< / a > < a href = 'SkMatrix_Reference#Matrix' > are< / a > < a href = 'SkMatrix_Reference#Matrix' > in< / a > < a href = 'SkMatrix_Reference#Matrix' > row< / a > < a href = 'SkMatrix_Reference#Matrix' > major< / a > < a href = 'SkMatrix_Reference#Matrix' > order< / a > . < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > does< / a > < a href = 'SkMatrix_Reference#Matrix' > not< / a > < a href = 'SkMatrix_Reference#Matrix' > have< / a > < a href = 'SkMatrix_Reference#Matrix' > a< / a > < a href = 'SkMatrix_Reference#Matrix' > constructor< / a > ,
< a href = 'SkMatrix_Reference#Matrix' > so< / a > < a href = 'SkMatrix_Reference#Matrix' > it< / a > < a href = 'SkMatrix_Reference#Matrix' > must< / a > < a href = 'SkMatrix_Reference#Matrix' > be< / a > < a href = 'SkMatrix_Reference#Matrix' > explicitly< / a > < a href = 'SkMatrix_Reference#Matrix' > initialized< / a > . < a href = '#SkMatrix_setIdentity' > setIdentity< / a > < a href = '#SkMatrix_setIdentity' > initializes< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a >
< a href = 'SkMatrix_Reference#Matrix' > so< / a > < a href = 'SkMatrix_Reference#Matrix' > it< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > no< / a > < a href = 'SkMatrix_Reference#Matrix' > effect< / a > . < a href = '#SkMatrix_setTranslate' > setTranslate< / a > , < a href = '#SkMatrix_setScale' > setScale< / a > , < a href = '#SkMatrix_setSkew' > setSkew< / a > , < a href = '#SkMatrix_setRotate' > setRotate< / a > , < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_set9' > and< / a > < a href = '#SkMatrix_setAll' > setAll< / a >
< a href = '#SkMatrix_setAll' > initializes< / a > < a href = '#SkMatrix_setAll' > all< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > elements< / a > < a href = 'SkMatrix_Reference#Matrix' > with< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > corresponding< / a > < a href = 'SkMatrix_Reference#Matrix' > mapping< / a > .
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > includes< / a > < a href = 'SkMatrix_Reference#Matrix' > a< / a > < a href = 'SkMatrix_Reference#Matrix' > hidden< / a > < a href = 'SkMatrix_Reference#Matrix' > variable< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = 'SkMatrix_Reference#Matrix' > classifies< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > type< / a > < a href = 'SkMatrix_Reference#Matrix' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a >
< a href = 'SkMatrix_Reference#Matrix' > improve< / a > < a href = 'SkMatrix_Reference#Matrix' > performance< / a > . < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > < a href = 'SkMatrix_Reference#Matrix' > not< / a > < a href = 'SkMatrix_Reference#Matrix' > thread< / a > < a href = 'SkMatrix_Reference#Matrix' > safe< / a > < a href = 'SkMatrix_Reference#Matrix' > unless< / a > < a href = '#SkMatrix_getType' > getType< / a > < a href = '#SkMatrix_getType' > is< / a > < a href = '#SkMatrix_getType' > called< / a > < a href = '#SkMatrix_getType' > first< / a > .
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< a name = 'SkMatrix_MakeScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_MakeScale_sx' > sx< / a > , < a href = '#SkMatrix_MakeScale_sy' > sy< / a > ). < a href = '#SkMatrix_MakeScale_sy' > Returned< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > :
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| < a href = '#SkMatrix_MakeScale_sx' > sx< / a > 0 0 |
| 0 < a href = '#SkMatrix_MakeScale_sy' > sy< / a > 0 |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_MakeScale_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeScale_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a >
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### Example
< div > < fiddle-embed name = "7ff17718111df6d6f95381d8a8f1b389" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_postScale' > postScale< / a > < a href = '#SkMatrix_preScale' > preScale< / a >
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< a name = 'SkMatrix_MakeScale_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scale< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > < a href = '#SkMatrix_MakeScale_2_scale' > by< / a > (< a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > , < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > ). < a href = '#SkMatrix_MakeScale_2_scale' > Returned< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > :
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| < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > 0 0 |
| 0 < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > 0 |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_MakeScale_2_scale' > < code > < strong > scale< / strong > < / code > < / a > < / td >
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< td > horizontal and vertical < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a > < a href = '#SkMatrix_MakeScale_2_scale' > factor< / a > < / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = '#SkMatrix_MakeScale_2_scale' > scale< / a >
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### Example
< div > < fiddle-embed name = "2956aeb50fa862cdb13995e1e56a4bc8" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_postScale' > postScale< / a > < a href = '#SkMatrix_preScale' > preScale< / a >
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< a name = 'SkMatrix_MakeTrans' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeTrans' > MakeTrans< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_MakeTrans_dx' > dx< / a > , < a href = '#SkMatrix_MakeTrans_dy' > dy< / a > ). < a href = '#SkMatrix_MakeTrans_dy' > Returned< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > :
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| 1 0 < a href = '#SkMatrix_MakeTrans_dx' > dx< / a > |
| 0 1 < a href = '#SkMatrix_MakeTrans_dy' > dy< / a > |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_MakeTrans_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
< td > horizontal translation< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeTrans_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
< td > vertical translation< / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a >
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### Example
< div > < fiddle-embed name = "b2479df0d9cf296ff64ac31e36684557" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_postTranslate' > postTranslate< / a > < a href = '#SkMatrix_preTranslate' > preTranslate< / a >
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< a name = 'SkMatrix_MakeAll' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewY< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers0< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers1< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > pers2< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| < a href = '#SkMatrix_MakeAll_scaleX' > scaleX< / a > < a href = '#SkMatrix_MakeAll_skewX' > skewX< / a > < a href = '#SkMatrix_MakeAll_transX' > transX< / a > |
| < a href = '#SkMatrix_MakeAll_skewY' > skewY< / a > < a href = '#SkMatrix_MakeAll_scaleY' > scaleY< / a > < a href = '#SkMatrix_MakeAll_transY' > transY< / a > |
| < a href = '#SkMatrix_MakeAll_pers0' > pers0< / a > < a href = '#SkMatrix_MakeAll_pers1' > pers1< / a > < a href = '#SkMatrix_MakeAll_pers2' > pers2< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_MakeAll_scaleX' > < code > < strong > scaleX< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_skewX' > < code > < strong > skewX< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_transX' > < code > < strong > transX< / strong > < / code > < / a > < / td >
< td > horizontal translation< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_skewY' > < code > < strong > skewY< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_scaleY' > < code > < strong > scaleY< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_transY' > < code > < strong > transY< / strong > < / code > < / a > < / td >
< td > vertical translation< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_pers0' > < code > < strong > pers0< / strong > < / code > < / a > < / td >
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< td > input x-axis perspective factor< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_pers1' > < code > < strong > pers1< / strong > < / code > < / a > < / td >
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< td > input y-axis perspective factor< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_MakeAll_pers2' > < code > < strong > pers2< / strong > < / code > < / a > < / td >
< td > perspective scale factor< / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > parameters< / a >
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### Example
< div > < fiddle-embed name = "6bad83b64de9266e323c29d550e04188" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setAll' > setAll< / a > < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_postConcat' > postConcat< / a > < a href = '#SkMatrix_preConcat' > preConcat< / a >
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< a name = 'SkMatrix_TypeMask' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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enum < a href = '#SkMatrix_TypeMask' > TypeMask< / a > {
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< a href = '#SkMatrix_kIdentity_Mask' > kIdentity_Mask< / a > = 0,
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< a href = '#SkMatrix_kTranslate_Mask' > kTranslate_Mask< / a > = 0< a href = '#SkMatrix_kTranslate_Mask' > x01< / a > ,
< a href = '#SkMatrix_kScale_Mask' > kScale_Mask< / a > = 0< a href = '#SkMatrix_kScale_Mask' > x02< / a > ,
< a href = '#SkMatrix_kAffine_Mask' > kAffine_Mask< / a > = 0< a href = '#SkMatrix_kAffine_Mask' > x04< / a > ,
< a href = '#SkMatrix_kPerspective_Mask' > kPerspective_Mask< / a > = 0< a href = '#SkMatrix_kPerspective_Mask' > x08< / a > ,
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};
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< / pre >
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Enumeration of bit fields for mask returned by < a href = '#SkMatrix_getType' > getType< / a > .
< a href = '#SkMatrix_getType' > Used< / a > < a href = '#SkMatrix_getType' > to< / a > < a href = '#SkMatrix_getType' > identify< / a > < a href = '#SkMatrix_getType' > the< / a > < a href = '#SkMatrix_getType' > complexity< / a > < a href = '#SkMatrix_getType' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > , < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > optimize< / a > < a href = 'SkMatrix_Reference#Matrix' > performance< / a > .
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### Constants
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< table style = 'border-collapse: collapse; width: 62.5em' >
< tr >< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Const</ th >
< th style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > Value</ th >
< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Description</ th ></ tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kIdentity_Mask' >< code > SkMatrix::kIdentity_Mask</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 0</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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all bits clear if < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > < a href = 'SkMatrix_Reference#Matrix' > identity< / a >
< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kTranslate_Mask' >< code > SkMatrix::kTranslate_Mask</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 1</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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set if < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > translation< / a >
< / td >
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< / tr >
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< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kScale_Mask' >< code > SkMatrix::kScale_Mask</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 2</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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set if < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > scales< / a > < a href = 'SkMatrix_Reference#Matrix' > x-axis< / a > < a href = 'SkMatrix_Reference#Matrix' > or< / a > < a href = 'SkMatrix_Reference#Matrix' > y-axis< / a >
< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kAffine_Mask' >< code > SkMatrix::kAffine_Mask</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 4</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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set if < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > skews< / a > < a href = 'SkMatrix_Reference#Matrix' > or< / a > < a href = 'SkMatrix_Reference#Matrix' > rotates< / a >
< / td >
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< / tr >
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< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kPerspective_Mask' >< code > SkMatrix::kPerspective_Mask</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 8</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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set if < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > perspective< / a >
< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "ba19b36df8cd78586f3dff54e2d4c093" >
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#### Example Output
~~~~
after reset: kIdentity_Mask
after postTranslate: kTranslate_Mask
after postScale: kTranslate_Mask kScale_Mask
after postScale: kTranslate_Mask kScale_Mask kAffine_Mask
after setPolyToPoly: kTranslate_Mask kScale_Mask kAffine_Mask kPerspective_Mask
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'Property' > < / a >
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< a name = 'SkMatrix_getType' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = '#SkMatrix_TypeMask' > TypeMask< / a > < a href = '#SkMatrix_getType' > getType< / a > () < a href = '#SkMatrix_getType' > const< / a >
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< / pre >
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Returns a bit field describing the transformations the < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > may< / a >
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perform. The bit field is computed conservatively, so it may include
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false positives. For example, when < a href = '#SkMatrix_kPerspective_Mask' > kPerspective_Mask< / a > < a href = '#SkMatrix_kPerspective_Mask' > is< / a > < a href = '#SkMatrix_kPerspective_Mask' > set< / a > , < a href = '#SkMatrix_kPerspective_Mask' > all< / a >
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other bits are set.
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### Return Value
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< a href = '#SkMatrix_kIdentity_Mask' > kIdentity_Mask< / a > , < a href = '#SkMatrix_kIdentity_Mask' > or< / a > < a href = '#SkMatrix_kIdentity_Mask' > combinations< / a > < a href = '#SkMatrix_kIdentity_Mask' > of< / a > : < a href = '#SkMatrix_kTranslate_Mask' > kTranslate_Mask< / a > , < a href = '#SkMatrix_kScale_Mask' > kScale_Mask< / a > ,
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< a href = '#SkMatrix_kAffine_Mask' > kAffine_Mask< / a > , < a href = '#SkMatrix_kPerspective_Mask' > kPerspective_Mask< / a >
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### Example
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< div > < fiddle-embed name = "8e45fe2dd52731bb2d4318686257e1d7" >
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#### Example Output
~~~~
identity flags hex: 0 decimal: 0
set all flags hex: f decimal: 15
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_TypeMask' > TypeMask< / a >
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< a name = 'SkMatrix_isIdentity' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isIdentity' > isIdentity< / a > () < a href = '#SkMatrix_isIdentity' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Identity< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > :
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| 1 0 0 |
| 0 1 0 |
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| 0 0 1 |
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### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > has< / a > < a href = 'SkMatrix_Reference#SkMatrix' > no< / a > < a href = 'SkMatrix_Reference#SkMatrix' > effect< / a >
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### Example
< div > < fiddle-embed name = "780ab376325b3cfa889ea26c0769ec11" >
#### Example Output
~~~~
is identity: true
is identity: false
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_reset' > reset()< / a > < a href = '#SkMatrix_setIdentity' > setIdentity< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_isScaleTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isScaleTranslate' > isScaleTranslate< / a > () < a href = '#SkMatrix_isScaleTranslate' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > at< / a > < a href = 'SkMatrix_Reference#SkMatrix' > most< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scales< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > may< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ,
contain only scale elements, only translate elements, or both. < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > :
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| scale-x 0 translate-x |
| 0 scale-y translate-y |
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| 0 0 1 |
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### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ; < a href = 'SkMatrix_Reference#SkMatrix' > or< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scales< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > or< / a > < a href = 'SkMatrix_Reference#SkMatrix' > both< / a >
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### Example
< div > < fiddle-embed name = "6287e29674a487eb94174992d45b9a34" >
#### Example Output
~~~~
is scale-translate: true
is scale-translate: true
is scale-translate: true
is scale-translate: true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_isTranslate' > isTranslate< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_isTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isTranslate' > isTranslate< / a > () < a href = '#SkMatrix_isTranslate' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > or< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > :
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| 1 0 translate-x |
| 0 1 translate-y |
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| 0 0 1 |
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### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > or< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a >
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### Example
< div > < fiddle-embed name = "73ac71a8a30841873577c11c6c9b38ee" >
#### Example Output
~~~~
is translate: true
is translate: true
is translate: false
is translate: false
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_rectStaysRect' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > () < a href = '#SkMatrix_rectStaysRect' > const< / a >
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< / pre >
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Returns true < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > maps< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > another< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > . < a href = 'SkRect_Reference#SkRect' > If< / a > < a href = 'SkRect_Reference#SkRect' > true< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ,
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or scales, or rotates a multiple of 90 degrees, or mirrors on axes. In all
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cases, < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > may< / a > < a href = 'SkMatrix_Reference#SkMatrix' > also< / a > < a href = 'SkMatrix_Reference#SkMatrix' > have< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > either< / a > :
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| scale-x 0 translate-x |
| 0 scale-y translate-y |
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| 0 0 1 |
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or
| 0 rotate-x translate-x |
| rotate-y 0 translate-y |
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| 0 0 1 |
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for non-zero values of scale-x, scale-y, rotate-x, and rotate-y.
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Also called < a href = '#SkMatrix_preservesAxisAlignment' > preservesAxisAlignment< / a > (); < a href = '#SkMatrix_preservesAxisAlignment' > use< / a > < a href = '#SkMatrix_preservesAxisAlignment' > the< / a > < a href = '#SkMatrix_preservesAxisAlignment' > one< / a > < a href = '#SkMatrix_preservesAxisAlignment' > that< / a > < a href = '#SkMatrix_preservesAxisAlignment' > provides< / a > < a href = '#SkMatrix_preservesAxisAlignment' > better< / a > < a href = '#SkMatrix_preservesAxisAlignment' > inline< / a >
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documentation.
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > maps< / a > < a href = 'SkMatrix_Reference#SkMatrix' > one< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > into< / a > < a href = 'SkRect_Reference#SkRect' > another< / a >
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### Example
< div > < fiddle-embed name = "ce5319c036c9b5086da8a0009fe409f8" >
#### Example Output
~~~~
rectStaysRect: true
rectStaysRect: true
rectStaysRect: true
rectStaysRect: true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preservesAxisAlignment' > preservesAxisAlignment< / a > < a href = '#SkMatrix_preservesRightAngles' > preservesRightAngles< / a >
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< a name = 'SkMatrix_preservesAxisAlignment' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_preservesAxisAlignment' > preservesAxisAlignment< / a > () < a href = '#SkMatrix_preservesAxisAlignment' > const< / a >
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< / pre >
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Returns true < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > maps< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > another< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > . < a href = 'SkRect_Reference#SkRect' > If< / a > < a href = 'SkRect_Reference#SkRect' > true< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ,
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or scales, or rotates a multiple of 90 degrees, or mirrors on axes. In all
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cases, < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > may< / a > < a href = 'SkMatrix_Reference#SkMatrix' > also< / a > < a href = 'SkMatrix_Reference#SkMatrix' > have< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > either< / a > :
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| scale-x 0 translate-x |
| 0 scale-y translate-y |
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| 0 0 1 |
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or
| 0 rotate-x translate-x |
| rotate-y 0 translate-y |
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| 0 0 1 |
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for non-zero values of scale-x, scale-y, rotate-x, and rotate-y.
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Also called < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > (); < a href = '#SkMatrix_rectStaysRect' > use< / a > < a href = '#SkMatrix_rectStaysRect' > the< / a > < a href = '#SkMatrix_rectStaysRect' > one< / a > < a href = '#SkMatrix_rectStaysRect' > that< / a > < a href = '#SkMatrix_rectStaysRect' > provides< / a > < a href = '#SkMatrix_rectStaysRect' > better< / a > < a href = '#SkMatrix_rectStaysRect' > inline< / a >
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documentation.
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > maps< / a > < a href = 'SkMatrix_Reference#SkMatrix' > one< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > into< / a > < a href = 'SkRect_Reference#SkRect' > another< / a >
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### Example
< div > < fiddle-embed name = "7a234c96608fb7cb8135b9940b0b15f7" >
#### Example Output
~~~~
preservesAxisAlignment: true
preservesAxisAlignment: true
preservesAxisAlignment: true
preservesAxisAlignment: true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > < a href = '#SkMatrix_preservesRightAngles' > preservesRightAngles< / a >
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< a name = 'SkMatrix_hasPerspective' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_hasPerspective' > hasPerspective< / a > () < a href = '#SkMatrix_hasPerspective' > const< / a >
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< / pre >
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Returns true if the < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > contains< / a > < a href = 'SkMatrix_Reference#Matrix' > perspective< / a > < a href = 'SkMatrix_Reference#Matrix' > elements< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > :
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| -- -- -- |
| -- -- -- |
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| perspective-x perspective-y perspective-scale |
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where perspective-x or perspective-y is non-zero, or perspective-scale is
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not one. All other elements may have any value.
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > in< / a > < a href = 'SkMatrix_Reference#SkMatrix' > most< / a > < a href = 'SkMatrix_Reference#SkMatrix' > general< / a > < a href = 'SkMatrix_Reference#SkMatrix' > form< / a >
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### Example
< div > < fiddle-embed name = "688123908c733169bbbfaf11f41ecff6" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setAll' > setAll< / a > < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a >
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2018-05-16 11:07:07 +00:00
< a name = 'SkMatrix_isSimilarity' > < / a >
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---
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2018-05-16 11:07:07 +00:00
< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isSimilarity' > isSimilarity< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tol< / a > = < a href = 'undocumented#SK_ScalarNearlyZero' > SK_ScalarNearlyZero< / a > ) < a href = 'undocumented#SK_ScalarNearlyZero' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > only< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > rotation< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > reflection< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > and< / a >
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uniform scale.
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Returns false if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > different< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scales< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > or< / a >
degenerate forms that collapse to a < a href = 'undocumented#Line' > line< / a > < a href = 'undocumented#Line' > or< / a > < a href = 'SkPoint_Reference#Point' > point< / a > .
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Describes that the < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > makes< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rendering< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > without< / a > < a href = 'SkMatrix_Reference#SkMatrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > are< / a >
visually alike; a transformed < a href = 'undocumented#Circle' > circle< / a > < a href = 'undocumented#Circle' > remains< / a > < a href = 'undocumented#Circle' > a< / a > < a href = 'undocumented#Circle' > circle< / a > . < a href = 'undocumented#Circle' > Mathematically< / a > , < a href = 'undocumented#Circle' > this< / a > < a href = 'undocumented#Circle' > is< / a >
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referred to as similarity of a < a href = 'undocumented#Euclidean_Space' > Euclidean space< / a > , or a similarity transformation.
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Preserves right angles, keeping the arms of the angle equal lengths.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_isSimilarity_tol' > < code > < strong > tol< / strong > < / code > < / a > < / td >
< td > to be deprecated< / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > only< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotates< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > uniformly< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scales< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a >
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### Example
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< div > < fiddle-embed name = "8b37f4ae7fec1756433c0f984175fb14" > < div > < a href = 'undocumented#String' > String< / a > < a href = 'undocumented#String' > is< / a > < a href = 'undocumented#String' > drawn< / a > < a href = 'undocumented#String' > four< / a > < a href = 'undocumented#String' > times< / a > < a href = 'undocumented#String' > through< / a > < a href = 'undocumented#String' > but< / a > < a href = 'undocumented#String' > only< / a > < a href = 'undocumented#String' > two< / a > < a href = 'undocumented#String' > are< / a > < a href = 'undocumented#String' > visible< / a > . < a href = 'undocumented#String' > Drawing< / a > < a href = 'undocumented#String' > the< / a > < a href = 'undocumented#String' > pair< / a >
< a href = 'undocumented#String' > with< / a > < a href = '#SkMatrix_isSimilarity' > isSimilarity< / a > < a href = '#SkMatrix_isSimilarity' > false< / a > < a href = '#SkMatrix_isSimilarity' > reveals< / a > < a href = '#SkMatrix_isSimilarity' > the< / a > < a href = '#SkMatrix_isSimilarity' > pair< / a > < a href = '#SkMatrix_isSimilarity' > not< / a > < a href = '#SkMatrix_isSimilarity' > visible< / a > < a href = '#SkMatrix_isSimilarity' > through< / a > < a href = '#SkMatrix_isSimilarity' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_isScaleTranslate' > isScaleTranslate< / a > < a href = '#SkMatrix_preservesRightAngles' > preservesRightAngles< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > < a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a >
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< a name = 'SkMatrix_preservesRightAngles' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_preservesRightAngles' > preservesRightAngles< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tol< / a > = < a href = 'undocumented#SK_ScalarNearlyZero' > SK_ScalarNearlyZero< / a > ) < a href = 'undocumented#SK_ScalarNearlyZero' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > only< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > rotation< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > reflection< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > and< / a >
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scale. Scale may differ along rotated axes.
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Returns false if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > or< / a > < a href = 'SkMatrix_Reference#SkMatrix' > degenerate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > forms< / a > < a href = 'SkMatrix_Reference#SkMatrix' > that< / a > < a href = 'SkMatrix_Reference#SkMatrix' > collapse< / a >
to a < a href = 'undocumented#Line' > line< / a > < a href = 'undocumented#Line' > or< / a > < a href = 'SkPoint_Reference#Point' > point< / a > .
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Preserves right angles, but not requiring that the arms of the angle
retain equal lengths.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preservesRightAngles_tol' > < code > < strong > tol< / strong > < / code > < / a > < / td >
< td > to be deprecated< / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > only< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotates< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > scales< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > translates< / a >
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### Example
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< div > < fiddle-embed name = "b9becf0dc24a9f00726e24a81fb72f16" > < div > Equal scale is both similar and preserves right angles.
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Unequal scale is not similar but preserves right angles.
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Skews are not similar and do not preserve right angles.
< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_isScaleTranslate' > isScaleTranslate< / a > < a href = '#SkMatrix_isSimilarity' > isSimilarity< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > < a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a >
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< a name = 'MemberIndex' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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static constexpr int < a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > = 0;
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< a href = '#SkMatrix_kMScaleX' > static< / a > < a href = '#SkMatrix_kMScaleX' > constexpr< / a > < a href = '#SkMatrix_kMScaleX' > int< / a > < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > = 1;
< a href = '#SkMatrix_kMSkewX' > static< / a > < a href = '#SkMatrix_kMSkewX' > constexpr< / a > < a href = '#SkMatrix_kMSkewX' > int< / a > < a href = '#SkMatrix_kMTransX' > kMTransX< / a > = 2;
< a href = '#SkMatrix_kMTransX' > static< / a > < a href = '#SkMatrix_kMTransX' > constexpr< / a > < a href = '#SkMatrix_kMTransX' > int< / a > < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > = 3;
< a href = '#SkMatrix_kMSkewY' > static< / a > < a href = '#SkMatrix_kMSkewY' > constexpr< / a > < a href = '#SkMatrix_kMSkewY' > int< / a > < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > = 4;
< a href = '#SkMatrix_kMScaleY' > static< / a > < a href = '#SkMatrix_kMScaleY' > constexpr< / a > < a href = '#SkMatrix_kMScaleY' > int< / a > < a href = '#SkMatrix_kMTransY' > kMTransY< / a > = 5;
< a href = '#SkMatrix_kMTransY' > static< / a > < a href = '#SkMatrix_kMTransY' > constexpr< / a > < a href = '#SkMatrix_kMTransY' > int< / a > < a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > = 6;
< a href = '#SkMatrix_kMPersp0' > static< / a > < a href = '#SkMatrix_kMPersp0' > constexpr< / a > < a href = '#SkMatrix_kMPersp0' > int< / a > < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > = 7;
< a href = '#SkMatrix_kMPersp1' > static< / a > < a href = '#SkMatrix_kMPersp1' > constexpr< / a > < a href = '#SkMatrix_kMPersp1' > int< / a > < a href = '#SkMatrix_kMPersp2' > kMPersp2< / a > = 8;
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< / pre >
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > organizes< / a > < a href = 'SkMatrix_Reference#Matrix' > its< / a > < a href = 'SkMatrix_Reference#Matrix' > values< / a > < a href = 'SkMatrix_Reference#Matrix' > in< / a > < a href = 'SkMatrix_Reference#Matrix' > row< / a > < a href = 'SkMatrix_Reference#Matrix' > order< / a > . < a href = 'SkMatrix_Reference#Matrix' > These< / a > < a href = 'SkMatrix_Reference#Matrix' > members< / a > < a href = 'SkMatrix_Reference#Matrix' > correspond< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a >
< a href = 'SkMatrix_Reference#Matrix' > each< / a > < a href = 'SkMatrix_Reference#Matrix' > value< / a > < a href = 'SkMatrix_Reference#Matrix' > in< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > .
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### Constants
< table style = 'border-collapse: collapse; width: 62.5em' >
< tr >< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Const</ th >
< th style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > Value</ th >
< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Description</ th ></ tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMScaleX' >< code > SkMatrix::kMScaleX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 0</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal scale factor< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMSkewX' >< code > SkMatrix::kMSkewX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 1</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal skew factor< / td >
< / tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMTransX' >< code > SkMatrix::kMTransX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 2</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal translation< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMSkewY' >< code > SkMatrix::kMSkewY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 3</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical skew factor< / td >
< / tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMScaleY' >< code > SkMatrix::kMScaleY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 4</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical scale factor< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMTransY' >< code > SkMatrix::kMTransY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 5</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical translation< / td >
< / tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMPersp0' >< code > SkMatrix::kMPersp0</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 6</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
input x perspective factor< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMPersp1' >< code > SkMatrix::kMPersp1</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 7</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
input y perspective factor< / td >
< / tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kMPersp2' >< code > SkMatrix::kMPersp2</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 8</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
perspective bias< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "3bbf75f4748420810aa2586e3c8548d9" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get()< / a > < a href = '#SkMatrix_set' > set()< / a >
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< a name = 'AffineIndex' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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< / pre >
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Affine arrays are in column major order to match the < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > used< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a >
< a href = 'SkMatrix_Reference#Matrix' > PDF< / a > < a href = 'SkMatrix_Reference#Matrix' > and< / a > < a href = 'SkMatrix_Reference#Matrix' > XPS< / a > .
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### Constants
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< table style = 'border-collapse: collapse; width: 62.5em' >
< tr >< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Const</ th >
< th style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > Value</ th >
< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Description</ th ></ tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kAScaleX' >< code > SkMatrix::kAScaleX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 0</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal scale factor< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kASkewY' >< code > SkMatrix::kASkewY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 1</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical skew factor< / td >
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< / tr >
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< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kASkewX' >< code > SkMatrix::kASkewX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 2</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal skew factor< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kAScaleY' >< code > SkMatrix::kAScaleY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 3</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical scale factor< / td >
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< / tr >
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< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kATransX' >< code > SkMatrix::kATransX</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 4</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
horizontal translation< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kATransY' >< code > SkMatrix::kATransY</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 5</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
vertical translation< / td >
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< / tr >
< / table >
### See Also
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< a href = '#SkMatrix_SetAffineIdentity' > SetAffineIdentity< / a > < a href = '#SkMatrix_asAffine' > asAffine< / a > < a href = '#SkMatrix_setAffine' > setAffine< / a >
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< a name = 'SkMatrix_array_operator' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > operator< / a > [](< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
### Example
< div > < fiddle-embed name = "e8740493abdf0c6341762db9cee56b89" >
#### Example Output
~~~~
matrix[SkMatrix::kMScaleX] == 42
matrix[SkMatrix::kMScaleY] == 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_set' > set< / a >
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< a name = 'SkMatrix_get' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > get< / a > (< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Returns one < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > value< / a > . < a href = 'SkMatrix_Reference#Matrix' > Asserts< / a > < a href = 'SkMatrix_Reference#Matrix' > if< / a > < a href = '#SkMatrix_get_index' > index< / a > < a href = '#SkMatrix_get_index' > is< / a > < a href = '#SkMatrix_get_index' > out< / a > < a href = '#SkMatrix_get_index' > of< / a > < a href = '#SkMatrix_get_index' > range< / a > < a href = '#SkMatrix_get_index' > and< / a > < a href = '#SkMatrix_get_index' > SK_DEBUG< / a > < a href = '#SkMatrix_get_index' > is< / a >
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defined.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_get_index' > < code > < strong > index< / strong > < / code > < / a > < / td >
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< td > one of: < a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > , < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > , < a href = '#SkMatrix_kMTransX' > kMTransX< / a > , < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > , < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > , < a href = '#SkMatrix_kMTransY' > kMTransY< / a > ,< / td >
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< / tr >
< / table >
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< a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > , < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > , < a href = '#SkMatrix_kMPersp2' > kMPersp2< / a >
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### Return Value
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value corresponding to < a href = '#SkMatrix_get_index' > index< / a >
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### Example
< div > < fiddle-embed name = "f5ed382bd04fa7d50b2398cce2fca23a" >
#### Example Output
~~~~
matrix.get(SkMatrix::kMSkewX) == 42
matrix.get(SkMatrix::kMSkewY) == 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_array1_operator' > operator[](int index)< / a > < a href = '#SkMatrix_set' > set< / a >
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< a name = 'SkMatrix_getScaleX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getScaleX' > getScaleX< / a > () < a href = '#SkMatrix_getScaleX' > const< / a >
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< / pre >
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Returns scale factor multiplied by x-axis input, contributing to x-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > scales< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > x-axis< / a > .
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### Return Value
horizontal scale factor
### Example
< div > < fiddle-embed name = "ab746d9be63975041ae8e50cba84dc3d" >
#### Example Output
~~~~
matrix.getScaleX() == 42
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getScaleY' > getScaleY< / a > < a href = '#SkMatrix_setScaleX' > setScaleX< / a > < a href = '#SkMatrix_setScale' > setScale< / a >
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< a name = 'SkMatrix_getScaleY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getScaleY' > getScaleY< / a > () < a href = '#SkMatrix_getScaleY' > const< / a >
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< / pre >
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Returns scale factor multiplied by y-axis input, contributing to y-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > scales< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > y-axis< / a > .
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### Return Value
vertical scale factor
### Example
< div > < fiddle-embed name = "708b1a548a2f8661b2ab570782fbc751" >
#### Example Output
~~~~
matrix.getScaleY() == 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getScaleX' > getScaleX< / a > < a href = '#SkMatrix_setScaleY' > setScaleY< / a > < a href = '#SkMatrix_setScale' > setScale< / a >
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< a name = 'SkMatrix_getSkewY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getSkewY' > getSkewY< / a > () < a href = '#SkMatrix_getSkewY' > const< / a >
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< / pre >
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Returns scale factor multiplied by x-axis input, contributing to y-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > skews< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > y-axis< / a > .
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Skewing both axes can rotate < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > .
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### Return Value
vertical skew factor
### Example
< div > < fiddle-embed name = "6be5704506d029ffc91ba03b1d3e674b" >
#### Example Output
~~~~
matrix.getSkewY() == 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getSkewX' > getSkewX< / a > < a href = '#SkMatrix_setSkewY' > setSkewY< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_getSkewX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getSkewX' > getSkewX< / a > () < a href = '#SkMatrix_getSkewX' > const< / a >
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< / pre >
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Returns scale factor multiplied by y-axis input, contributing to x-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > skews< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > x-axis< / a > .
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Skewing both axes can rotate < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > .
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### Return Value
horizontal scale factor
### Example
< div > < fiddle-embed name = "df3a5d3c688e7597eae1e4e07bf91ae6" >
#### Example Output
~~~~
matrix.getSkewX() == 42
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getSkewY' > getSkewY< / a > < a href = '#SkMatrix_setSkewX' > setSkewX< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_getTranslateX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getTranslateX' > getTranslateX< / a > () < a href = '#SkMatrix_getTranslateX' > const< / a >
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< / pre >
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Returns translation contributing to x-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > moves< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > x-axis< / a > .
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### Return Value
horizontal translation factor
### Example
< div > < fiddle-embed name = "6236f7f2b91aff977a66ba2ee2558ca4" >
#### Example Output
~~~~
matrix.getTranslateX() == 42
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getTranslateY' > getTranslateY< / a > < a href = '#SkMatrix_setTranslateX' > setTranslateX< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a >
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< a name = 'SkMatrix_getTranslateY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getTranslateY' > getTranslateY< / a > () < a href = '#SkMatrix_getTranslateY' > const< / a >
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< / pre >
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Returns translation contributing to y-axis output.
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With < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (), < a href = '#SkMatrix_mapPoints' > moves< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > along< / a > < a href = 'SkPoint_Reference#SkPoint' > the< / a > < a href = 'SkPoint_Reference#SkPoint' > y-axis< / a > .
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### Return Value
vertical translation factor
### Example
< div > < fiddle-embed name = "08464e32d22421d2b254c71a84545ef5" >
#### Example Output
~~~~
matrix.getTranslateY() == 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_getTranslateX' > getTranslateX< / a > < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a >
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< a name = 'SkMatrix_getPerspX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getPerspX' > getPerspX< / a > () < a href = '#SkMatrix_getPerspX' > const< / a >
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< / pre >
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Returns factor scaling input x-axis relative to input y-axis.
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### Return Value
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input x-axis perspective factor
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### Example
< div > < fiddle-embed name = "a0f5bf4b55e8c33bfda29bf67e34306f" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > < a href = '#SkMatrix_getPerspY' > getPerspY< / a >
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< a name = 'SkMatrix_getPerspY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getPerspY' > getPerspY< / a > () < a href = '#SkMatrix_getPerspY' > const< / a >
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< / pre >
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Returns factor scaling input y-axis relative to input x-axis.
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### Return Value
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input y-axis perspective factor
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### Example
< div > < fiddle-embed name = "424a00a73675dbd99ad20feb0267442b" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > < a href = '#SkMatrix_getPerspX' > getPerspX< / a >
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< a name = 'SkMatrix_array1_operator' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > & < a href = 'undocumented#SkScalar' > operator< / a > [](< a href = 'undocumented#SkScalar' > int< / a > < a href = 'undocumented#SkScalar' > index< / a > )
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< / pre >
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### Example
< div > < fiddle-embed name = "f4365ef332f51f7fd25040e0771ba9a2" >
#### Example Output
~~~~
with identity matrix: x = 24
after skew x mod: x = 24
after 2nd skew x mod: x = 24
after dirty cache: x = 66
~~~~
< / fiddle-embed > < / div >
### See Also
< a href = '#SkMatrix_get' > get< / a > < a href = '#SkMatrix_dirtyMatrixTypeCache' > dirtyMatrixTypeCache< / a > < a href = '#SkMatrix_set' > set< / a >
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< a name = 'Set' > < / a >
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< a name = 'SkMatrix_set' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void set(int index, < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > value< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_set_value' > value< / a > . < a href = '#SkMatrix_set_value' > Asserts< / a > < a href = '#SkMatrix_set_value' > if< / a > < a href = '#SkMatrix_set_index' > index< / a > < a href = '#SkMatrix_set_index' > is< / a > < a href = '#SkMatrix_set_index' > out< / a > < a href = '#SkMatrix_set_index' > of< / a > < a href = '#SkMatrix_set_index' > range< / a > < a href = '#SkMatrix_set_index' > and< / a > < a href = '#SkMatrix_set_index' > SK_DEBUG< / a > < a href = '#SkMatrix_set_index' > is< / a >
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defined. Safer than operator[]; internal cache is always maintained.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_set_index' > < code > < strong > index< / strong > < / code > < / a > < / td >
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< td > one of: < a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > , < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > , < a href = '#SkMatrix_kMTransX' > kMTransX< / a > , < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > , < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > , < a href = '#SkMatrix_kMTransY' > kMTransY< / a > ,< / td >
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< / tr >
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< / table >
< a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > , < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > , < a href = '#SkMatrix_kMPersp2' > kMPersp2< / a >
### Parameters
< table > < tr > < td > < a name = 'SkMatrix_set_value' > < code > < strong > value< / strong > < / code > < / a > < / td >
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< td > < a href = 'undocumented#Scalar' > scalar< / a > < a href = 'undocumented#Scalar' > to< / a > < a href = 'undocumented#Scalar' > store< / a > < a href = 'undocumented#Scalar' > in< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "1d400a92ca826cc89bcb88ea051f28c8" >
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#### Example Output
~~~~
with identity matrix: x = 24
after skew x mod: x = 24
after 2nd skew x mod: x = 66
~~~~
< / fiddle-embed > < / div >
### See Also
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operator[] < a href = '#SkMatrix_get' > get< / a >
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< a name = 'SkMatrix_setScaleX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setScaleX' > setScaleX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets horizontal scale factor.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setScaleX_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > horizontal scale factor to store< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "a39dfed98c3c3c3a56be9ad59fe4e21e" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_setScaleY' > setScaleY< / a >
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< a name = 'SkMatrix_setScaleY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setScaleY' > setScaleY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets vertical scale factor.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setScaleY_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > vertical scale factor to store< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "f040c6dd85a02e94eaca00d5c2832604" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_setScaleX' > setScaleX< / a >
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< a name = 'SkMatrix_setSkewY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSkewY' > setSkewY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets vertical skew factor.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSkewY_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > vertical skew factor to store< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "b418d15df9829aefcc6aca93a37428bb" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a > < a href = '#SkMatrix_setSkewX' > setSkewX< / a >
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< a name = 'SkMatrix_setSkewX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSkewX' > setSkewX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets horizontal skew factor.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSkewX_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > horizontal skew factor to store< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "c7177a6fbc1545be95a5ebca87e0cd0d" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a > < a href = '#SkMatrix_setSkewX' > setSkewX< / a >
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< a name = 'SkMatrix_setTranslateX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setTranslateX' > setTranslateX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
Sets horizontal translation.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setTranslateX_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > horizontal translation to store< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "a18bc2e3607ac3a8e438bcb61fb13130" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a >
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< a name = 'SkMatrix_setTranslateY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
Sets vertical translation.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setTranslateY_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > vertical translation to store< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "34e3c70a72b836abf7f4858d35eecc98" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_setTranslateX' > setTranslateX< / a >
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< a name = 'SkMatrix_setPerspX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setPerspX' > setPerspX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets input x-axis perspective factor, which causes < a href = '#SkMatrix_mapXY' > mapXY< / a > () < a href = '#SkMatrix_mapXY' > to< / a > < a href = '#SkMatrix_mapXY' > vary< / a > < a href = '#SkMatrix_mapXY' > input< / a > < a href = '#SkMatrix_mapXY' > x-axis< / a > < a href = '#SkMatrix_mapXY' > values< / a >
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inversely proportional to input y-axis values.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setPerspX_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > perspective factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "830a9e4e4bb93d25afd83b2fea63929e" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getPerspX' > getPerspX< / a > < a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setAll' > setAll< / a > < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a >
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< a name = 'SkMatrix_setPerspY' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setPerspY' > setPerspY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > v< / a > )
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< / pre >
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Sets input y-axis perspective factor, which causes < a href = '#SkMatrix_mapXY' > mapXY< / a > () < a href = '#SkMatrix_mapXY' > to< / a > < a href = '#SkMatrix_mapXY' > vary< / a > < a href = '#SkMatrix_mapXY' > input< / a > < a href = '#SkMatrix_mapXY' > y-axis< / a > < a href = '#SkMatrix_mapXY' > values< / a >
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inversely proportional to input x-axis values.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setPerspY_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
< td > perspective factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "aeb258b7922c1a11b698b00f562182ec" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getPerspY' > getPerspY< / a > < a href = '#SkMatrix_set' > set< / a > < a href = '#SkMatrix_setAll' > setAll< / a > < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a >
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< a name = 'SkMatrix_setAll' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setAll' > setAll< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transX< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > skewY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleY< / a > ,
< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > transY< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp0< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp1< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > persp2< / a > )
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< / pre >
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Sets all values from parameters. Sets < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > :
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| < a href = '#SkMatrix_setAll_scaleX' > scaleX< / a > < a href = '#SkMatrix_setAll_skewX' > skewX< / a > < a href = '#SkMatrix_setAll_transX' > transX< / a > |
| < a href = '#SkMatrix_setAll_skewY' > skewY< / a > < a href = '#SkMatrix_setAll_scaleY' > scaleY< / a > < a href = '#SkMatrix_setAll_transY' > transY< / a > |
| < a href = '#SkMatrix_setAll_persp0' > persp0< / a > < a href = '#SkMatrix_setAll_persp1' > persp1< / a > < a href = '#SkMatrix_setAll_persp2' > persp2< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setAll_scaleX' > < code > < strong > scaleX< / strong > < / code > < / a > < / td >
< td > horizontal scale factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_skewX' > < code > < strong > skewX< / strong > < / code > < / a > < / td >
< td > horizontal skew factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_transX' > < code > < strong > transX< / strong > < / code > < / a > < / td >
< td > horizontal translation to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_skewY' > < code > < strong > skewY< / strong > < / code > < / a > < / td >
< td > vertical skew factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_scaleY' > < code > < strong > scaleY< / strong > < / code > < / a > < / td >
< td > vertical scale factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_transY' > < code > < strong > transY< / strong > < / code > < / a > < / td >
< td > vertical translation to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_persp0' > < code > < strong > persp0< / strong > < / code > < / a > < / td >
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< td > input x-axis values perspective factor to store< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_persp1' > < code > < strong > persp1< / strong > < / code > < / a > < / td >
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< td > input y-axis values perspective factor to store< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setAll_persp2' > < code > < strong > persp2< / strong > < / code > < / a > < / td >
< td > perspective scale factor to store< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "95ccfc2a89ce593e6b7a9f992a844bc0" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a >
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< a name = 'SkMatrix_get9' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_get9' > get9< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > buffer< / a > [9]) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Copies nine < a href = 'undocumented#Scalar' > scalar< / a > < a href = 'undocumented#Scalar' > values< / a > < a href = 'undocumented#Scalar' > contained< / a > < a href = 'undocumented#Scalar' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > into< / a > < a href = '#SkMatrix_get9_buffer' > buffer< / a > , < a href = '#SkMatrix_get9_buffer' > in< / a > < a href = '#SkMatrix_get9_buffer' > member< / a > < a href = '#SkMatrix_get9_buffer' > value< / a >
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ascending order: < a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > , < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > , < a href = '#SkMatrix_kMTransX' > kMTransX< / a > , < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > , < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > , < a href = '#SkMatrix_kMTransY' > kMTransY< / a > ,
< a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > , < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > , < a href = '#SkMatrix_kMPersp2' > kMPersp2< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_get9_buffer' > < code > < strong > buffer< / strong > < / code > < / a > < / td >
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< td > storage for nine < a href = 'undocumented#Scalar' > scalar< / a > < a href = 'undocumented#Scalar' > values< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "379fc375e011050b54ed9df83c0996a7" >
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#### Example Output
~~~~
{4, 0, 3},
{0, 5, 4},
{0, 0, 1}
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_set9' > set9< / a >
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< a name = 'SkMatrix_set9' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_set9' > set9< / a > (< a href = '#SkMatrix_set9' > const< / a > < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > buffer< / a > [9])
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > nine< / a > < a href = 'undocumented#Scalar' > scalar< / a > < a href = 'undocumented#Scalar' > values< / a > < a href = 'undocumented#Scalar' > in< / a > < a href = '#SkMatrix_set9_buffer' > buffer< / a > , < a href = '#SkMatrix_set9_buffer' > in< / a > < a href = '#SkMatrix_set9_buffer' > member< / a > < a href = '#SkMatrix_set9_buffer' > value< / a > < a href = '#SkMatrix_set9_buffer' > ascending< / a > < a href = '#SkMatrix_set9_buffer' > order< / a > :
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< a href = '#SkMatrix_kMScaleX' > kMScaleX< / a > , < a href = '#SkMatrix_kMSkewX' > kMSkewX< / a > , < a href = '#SkMatrix_kMTransX' > kMTransX< / a > , < a href = '#SkMatrix_kMSkewY' > kMSkewY< / a > , < a href = '#SkMatrix_kMScaleY' > kMScaleY< / a > , < a href = '#SkMatrix_kMTransY' > kMTransY< / a > , < a href = '#SkMatrix_kMPersp0' > kMPersp0< / a > , < a href = '#SkMatrix_kMPersp1' > kMPersp1< / a > ,
< a href = '#SkMatrix_kMPersp2' > kMPersp2< / a > .
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Sets < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > :
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| < a href = '#SkMatrix_set9_buffer' > buffer< / a > [0] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [1] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [2] |
| < a href = '#SkMatrix_set9_buffer' > buffer< / a > [3] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [4] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [5] |
| < a href = '#SkMatrix_set9_buffer' > buffer< / a > [6] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [7] < a href = '#SkMatrix_set9_buffer' > buffer< / a > [8] |
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In the future, < a href = '#SkMatrix_set9' > set9< / a > < a href = '#SkMatrix_set9' > followed< / a > < a href = '#SkMatrix_set9' > by< / a > < a href = '#SkMatrix_get9' > get9< / a > < a href = '#SkMatrix_get9' > may< / a > < a href = '#SkMatrix_get9' > not< / a > < a href = '#SkMatrix_get9' > return< / a > < a href = '#SkMatrix_get9' > the< / a > < a href = '#SkMatrix_get9' > same< / a > < a href = '#SkMatrix_get9' > values< / a > . < a href = '#SkMatrix_get9' > Since< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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maps non-homogeneous coordinates, scaling all nine values produces an equivalent
transformation, possibly improving precision.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_set9_buffer' > < code > < strong > buffer< / strong > < / code > < / a > < / td >
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< td > nine < a href = 'undocumented#Scalar' > scalar< / a > < a href = 'undocumented#Scalar' > values< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "ec5de0d23e5fe28ba7628625d1402e85" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setAll' > setAll< / a > < a href = '#SkMatrix_get9' > get9< / a > < a href = '#SkMatrix_MakeAll' > MakeAll< / a >
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< a name = 'SkMatrix_reset' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_reset' > reset()< / a >
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ; < a href = 'SkMatrix_Reference#SkMatrix' > which< / a > < a href = 'SkMatrix_Reference#SkMatrix' > has< / a > < a href = 'SkMatrix_Reference#SkMatrix' > no< / a > < a href = 'SkMatrix_Reference#SkMatrix' > effect< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > . < a href = 'SkPoint_Reference#SkPoint' > Sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 0 0 |
| 0 1 0 |
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| 0 0 1 |
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Also called < a href = '#SkMatrix_setIdentity' > setIdentity< / a > (); < a href = '#SkMatrix_setIdentity' > use< / a > < a href = '#SkMatrix_setIdentity' > the< / a > < a href = '#SkMatrix_setIdentity' > one< / a > < a href = '#SkMatrix_setIdentity' > that< / a > < a href = '#SkMatrix_setIdentity' > provides< / a > < a href = '#SkMatrix_setIdentity' > better< / a > < a href = '#SkMatrix_setIdentity' > inline< / a >
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documentation.
### Example
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< div > < fiddle-embed name = "ca94f7922bc37ef03bbc51ad70536fcf" >
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#### Example Output
~~~~
m.isIdentity(): true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_isIdentity' > isIdentity< / a > < a href = '#SkMatrix_setIdentity' > setIdentity< / a >
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< a name = 'SkMatrix_setIdentity' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
void < a href = '#SkMatrix_setIdentity' > setIdentity< / a > ()
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > ; < a href = 'SkMatrix_Reference#SkMatrix' > which< / a > < a href = 'SkMatrix_Reference#SkMatrix' > has< / a > < a href = 'SkMatrix_Reference#SkMatrix' > no< / a > < a href = 'SkMatrix_Reference#SkMatrix' > effect< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > . < a href = 'SkPoint_Reference#SkPoint' > Sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 0 0 |
| 0 1 0 |
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| 0 0 1 |
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Also called < a href = '#SkMatrix_reset' > reset()< / a > ; < a href = '#SkMatrix_reset' > use< / a > < a href = '#SkMatrix_reset' > the< / a > < a href = '#SkMatrix_reset' > one< / a > < a href = '#SkMatrix_reset' > that< / a > < a href = '#SkMatrix_reset' > provides< / a > < a href = '#SkMatrix_reset' > better< / a > < a href = '#SkMatrix_reset' > inline< / a >
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documentation.
### Example
< div > < fiddle-embed name = "3979c865bb482e6ef1fafc71e56bbb91" >
#### Example Output
~~~~
m.isIdentity(): true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_isIdentity' > isIdentity< / a > < a href = '#SkMatrix_reset' > reset< / a >
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< a name = 'SkMatrix_setTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setTranslate' > setTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_setTranslate_dx' > dx< / a > , < a href = '#SkMatrix_setTranslate_dy' > dy< / a > ).
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setTranslate_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
< td > horizontal translation< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setTranslate_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
< td > vertical translation< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "63ca62985741b1bccb5e8b9cf734874e" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setTranslateX' > setTranslateX< / a > < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a >
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< a name = 'SkMatrix_setTranslate_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setTranslate' > setTranslate< / a > (< a href = '#SkMatrix_setTranslate' > const< / a > < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > & < a href = 'SkPoint_Reference#SkVector' > v< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_setTranslate_2_v' > v< / a > .< a href = '#SkPoint_fX' > fX< / a > , < a href = '#SkMatrix_setTranslate_2_v' > v< / a > .< a href = '#SkPoint_fY' > fY< / a > ).
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setTranslate_2_v' > < code > < strong > v< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > containing< / a > < a href = 'SkPoint_Reference#Vector' > horizontal< / a > < a href = 'SkPoint_Reference#Vector' > and< / a > < a href = 'SkPoint_Reference#Vector' > vertical< / a > < a href = 'SkPoint_Reference#Vector' > translation< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "ccfc734aff2ddea0b097c83f5621de5e" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setTranslateX' > setTranslateX< / a > < a href = '#SkMatrix_setTranslateY' > setTranslateY< / a > < a href = '#SkMatrix_MakeTrans' > MakeTrans< / a >
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< a name = 'SkMatrix_setScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setScale' > setScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setScale_sx' > sx< / a > < a href = '#SkMatrix_setScale_sx' > and< / a > < a href = '#SkMatrix_setScale_sy' > sy< / a > , < a href = '#SkMatrix_setScale_sy' > about< / a > < a href = '#SkMatrix_setScale_sy' > a< / a > < a href = '#SkMatrix_setScale_sy' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (< a href = '#SkMatrix_setScale_px' > px< / a > , < a href = '#SkMatrix_setScale_py' > py< / a > ).
The pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > is< / a > < a href = 'SkPoint_Reference#Point' > unchanged< / a > < a href = 'SkPoint_Reference#Point' > when< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setScale_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScale_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScale_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setScale_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "4565a0792058178c88e0a129a87272d6" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setScaleX' > setScaleX< / a > < a href = '#SkMatrix_setScaleY' > setScaleY< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > < a href = '#SkMatrix_preScale' > preScale< / a > < a href = '#SkMatrix_postScale' > postScale< / a >
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< a name = 'SkMatrix_setScale_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setScale' > setScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setScale_2_sx' > sx< / a > < a href = '#SkMatrix_setScale_2_sx' > and< / a > < a href = '#SkMatrix_setScale_2_sy' > sy< / a > < a href = '#SkMatrix_setScale_2_sy' > about< / a > < a href = '#SkMatrix_setScale_2_sy' > at< / a > < a href = '#SkMatrix_setScale_2_sy' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (0, 0).
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setScale_2_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScale_2_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "1579d0cc109c26e69f66f73abd35fb0e" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setScaleX' > setScaleX< / a > < a href = '#SkMatrix_setScaleY' > setScaleY< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a > < a href = '#SkMatrix_preScale' > preScale< / a > < a href = '#SkMatrix_postScale' > postScale< / a >
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< a name = 'SkMatrix_setRotate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setRotate' > setRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setRotate_degrees' > degrees< / a > < a href = '#SkMatrix_setRotate_degrees' > about< / a > < a href = '#SkMatrix_setRotate_degrees' > a< / a > < a href = '#SkMatrix_setRotate_degrees' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (< a href = '#SkMatrix_setRotate_px' > px< / a > , < a href = '#SkMatrix_setRotate_py' > py< / a > ).
The pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > is< / a > < a href = 'SkPoint_Reference#Point' > unchanged< / a > < a href = 'SkPoint_Reference#Point' > when< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Positive < a href = '#SkMatrix_setRotate_degrees' > degrees< / a > < a href = '#SkMatrix_setRotate_degrees' > rotates< / a > < a href = '#SkMatrix_setRotate_degrees' > clockwise< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setRotate_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setRotate_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setRotate_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "8c28db3add9cd0177225088f6df6bbb5" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setSinCos' > setSinCos< / a > < a href = '#SkMatrix_preRotate' > preRotate< / a > < a href = '#SkMatrix_postRotate' > postRotate< / a >
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< a name = 'SkMatrix_setRotate_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setRotate' > setRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setRotate_2_degrees' > degrees< / a > < a href = '#SkMatrix_setRotate_2_degrees' > about< / a > < a href = '#SkMatrix_setRotate_2_degrees' > a< / a > < a href = '#SkMatrix_setRotate_2_degrees' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (0, 0).
Positive < a href = '#SkMatrix_setRotate_2_degrees' > degrees< / a > < a href = '#SkMatrix_setRotate_2_degrees' > rotates< / a > < a href = '#SkMatrix_setRotate_2_degrees' > clockwise< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setRotate_2_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "93efb9d191bf1b9710c173513e014d6c" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setSinCos' > setSinCos< / a > < a href = '#SkMatrix_preRotate' > preRotate< / a > < a href = '#SkMatrix_postRotate' > postRotate< / a >
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< a name = 'SkMatrix_setSinCos' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSinCos' > setSinCos< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sinValue< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > cosValue< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setSinCos_sinValue' > sinValue< / a > < a href = '#SkMatrix_setSinCos_sinValue' > and< / a > < a href = '#SkMatrix_setSinCos_cosValue' > cosValue< / a > , < a href = '#SkMatrix_setSinCos_cosValue' > about< / a > < a href = '#SkMatrix_setSinCos_cosValue' > a< / a > < a href = '#SkMatrix_setSinCos_cosValue' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (< a href = '#SkMatrix_setSinCos_px' > px< / a > , < a href = '#SkMatrix_setSinCos_py' > py< / a > ).
The pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > is< / a > < a href = 'SkPoint_Reference#Point' > unchanged< / a > < a href = 'SkPoint_Reference#Point' > when< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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< a href = 'SkPoint_Reference#Vector' > Vector< / a > (< a href = '#SkMatrix_setSinCos_sinValue' > sinValue< / a > , < a href = '#SkMatrix_setSinCos_cosValue' > cosValue< / a > ) < a href = '#SkMatrix_setSinCos_cosValue' > describes< / a > < a href = '#SkMatrix_setSinCos_cosValue' > the< / a > < a href = '#SkMatrix_setSinCos_cosValue' > angle< / a > < a href = '#SkMatrix_setSinCos_cosValue' > of< / a > < a href = '#SkMatrix_setSinCos_cosValue' > rotation< / a > < a href = '#SkMatrix_setSinCos_cosValue' > relative< / a > < a href = '#SkMatrix_setSinCos_cosValue' > to< / a > (0, 1).
< a href = 'SkPoint_Reference#Vector' > Vector< / a > < a href = 'SkPoint_Reference#Vector' > length< / a > < a href = 'SkPoint_Reference#Vector' > specifies< / a > < a href = 'SkPoint_Reference#Vector' > scale< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSinCos_sinValue' > < code > < strong > sinValue< / strong > < / code > < / a > < / td >
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< td > rotation < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > x-axis< / a > < a href = 'SkPoint_Reference#Vector' > component< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setSinCos_cosValue' > < code > < strong > cosValue< / strong > < / code > < / a > < / td >
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< td > rotation < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > y-axis< / a > < a href = 'SkPoint_Reference#Vector' > component< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setSinCos_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setSinCos_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "187e1d9228e2e4341ef820bd77b6fda9" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setRotate' > setRotate< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_setRSXform' > setRSXform< / a >
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< a name = 'SkMatrix_setSinCos_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSinCos' > setSinCos< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sinValue< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > cosValue< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setSinCos_2_sinValue' > sinValue< / a > < a href = '#SkMatrix_setSinCos_2_sinValue' > and< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > cosValue< / a > , < a href = '#SkMatrix_setSinCos_2_cosValue' > about< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > a< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (0, 0).
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< a href = 'SkPoint_Reference#Vector' > Vector< / a > (< a href = '#SkMatrix_setSinCos_2_sinValue' > sinValue< / a > , < a href = '#SkMatrix_setSinCos_2_cosValue' > cosValue< / a > ) < a href = '#SkMatrix_setSinCos_2_cosValue' > describes< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > the< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > angle< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > of< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > rotation< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > relative< / a > < a href = '#SkMatrix_setSinCos_2_cosValue' > to< / a > (0, 1).
< a href = 'SkPoint_Reference#Vector' > Vector< / a > < a href = 'SkPoint_Reference#Vector' > length< / a > < a href = 'SkPoint_Reference#Vector' > specifies< / a > < a href = 'SkPoint_Reference#Vector' > scale< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSinCos_2_sinValue' > < code > < strong > sinValue< / strong > < / code > < / a > < / td >
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< td > rotation < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > x-axis< / a > < a href = 'SkPoint_Reference#Vector' > component< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setSinCos_2_cosValue' > < code > < strong > cosValue< / strong > < / code > < / a > < / td >
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< td > rotation < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > y-axis< / a > < a href = 'SkPoint_Reference#Vector' > component< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "e37a94a53c959951b059fcd624639ef6" > < div > < a href = 'SkCanvas_Reference#Canvas' > Canvas< / a > < a href = 'SkCanvas_Reference#Canvas' > needs< / a > < a href = 'SkCanvas_Reference#Canvas' > offset< / a > < a href = 'SkCanvas_Reference#Canvas' > after< / a > < a href = 'SkCanvas_Reference#Canvas' > applying< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > pivot< / a > < a href = 'SkMatrix_Reference#Matrix' > about< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > center< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setRotate' > setRotate< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_setRSXform' > setRSXform< / a >
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< a name = 'SkMatrix_setRSXform' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_setRSXform' > setRSXform< / a > (< a href = '#SkMatrix_setRSXform' > const< / a > < a href = 'undocumented#SkRSXform' > SkRSXform< / a > & < a href = 'undocumented#SkRSXform' > rsxForm< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotate< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > using< / a > < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compressed< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > form< / a > .
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< a href = 'SkPoint_Reference#Vector' > Vector< / a > (< a href = '#SkMatrix_setRSXform_rsxForm' > rsxForm< / a > .< a href = '#SkRSXform_fSSin' > fSSin< / a > , < a href = '#SkMatrix_setRSXform_rsxForm' > rsxForm< / a > .< a href = '#SkRSXform_fSCos' > fSCos< / a > ) < a href = '#SkRSXform_fSCos' > describes< / a > < a href = '#SkRSXform_fSCos' > the< / a > < a href = '#SkRSXform_fSCos' > angle< / a > < a href = '#SkRSXform_fSCos' > of< / a > < a href = '#SkRSXform_fSCos' > rotation< / a > < a href = '#SkRSXform_fSCos' > relative< / a >
to (0, 1). < a href = 'SkPoint_Reference#Vector' > Vector< / a > < a href = 'SkPoint_Reference#Vector' > length< / a > < a href = 'SkPoint_Reference#Vector' > specifies< / a > < a href = 'SkPoint_Reference#Vector' > scale< / a > . < a href = 'SkPoint_Reference#Vector' > Mapped< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > is< / a > < a href = 'SkPoint_Reference#Point' > rotated< / a > < a href = 'SkPoint_Reference#Point' > and< / a > < a href = 'SkPoint_Reference#Point' > scaled< / a >
by < a href = 'SkPoint_Reference#Vector' > vector< / a > , < a href = 'SkPoint_Reference#Vector' > then< / a > < a href = 'SkPoint_Reference#Vector' > translated< / a > < a href = 'SkPoint_Reference#Vector' > by< / a > (< a href = '#SkMatrix_setRSXform_rsxForm' > rsxForm< / a > .< a href = '#SkRSXform_fTx' > fTx< / a > , < a href = '#SkMatrix_setRSXform_rsxForm' > rsxForm< / a > .< a href = '#SkRSXform_fTy' > fTy< / a > ).
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setRSXform_rsxForm' > < code > < strong > rsxForm< / strong > < / code > < / a > < / td >
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< td > compressed < a href = 'undocumented#SkRSXform' > SkRSXform< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < / td >
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< / tr >
< / table >
### Return Value
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reference to < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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### Example
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< div > < fiddle-embed name = "c3f5faddca466f78278b32b88fd5f5eb" > < div > < a href = 'SkCanvas_Reference#Canvas' > Canvas< / a > < a href = 'SkCanvas_Reference#Canvas' > needs< / a > < a href = 'SkCanvas_Reference#Canvas' > offset< / a > < a href = 'SkCanvas_Reference#Canvas' > after< / a > < a href = 'SkCanvas_Reference#Canvas' > applying< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > pivot< / a > < a href = 'SkMatrix_Reference#Matrix' > about< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > center< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setSinCos' > setSinCos< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a >
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< a name = 'SkMatrix_setSkew' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSkew' > setSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skew< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setSkew_kx' > kx< / a > < a href = '#SkMatrix_setSkew_kx' > and< / a > < a href = '#SkMatrix_setSkew_ky' > ky< / a > , < a href = '#SkMatrix_setSkew_ky' > about< / a > < a href = '#SkMatrix_setSkew_ky' > a< / a > < a href = '#SkMatrix_setSkew_ky' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (< a href = '#SkMatrix_setSkew_px' > px< / a > , < a href = '#SkMatrix_setSkew_py' > py< / a > ).
The pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > is< / a > < a href = 'SkPoint_Reference#Point' > unchanged< / a > < a href = 'SkPoint_Reference#Point' > when< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSkew_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setSkew_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setSkew_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setSkew_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "55e0431adc6c5b1987ebb8123cc10342" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_setSkewX' > setSkewX< / a > < a href = '#SkMatrix_setSkewY' > setSkewY< / a > < a href = '#SkMatrix_preSkew' > preSkew< / a > < a href = '#SkMatrix_postSkew' > postSkew< / a >
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< a name = 'SkMatrix_setSkew_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setSkew' > setSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skew< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_setSkew_2_kx' > kx< / a > < a href = '#SkMatrix_setSkew_2_kx' > and< / a > < a href = '#SkMatrix_setSkew_2_ky' > ky< / a > , < a href = '#SkMatrix_setSkew_2_ky' > about< / a > < a href = '#SkMatrix_setSkew_2_ky' > a< / a > < a href = '#SkMatrix_setSkew_2_ky' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > at< / a > (0, 0).
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setSkew_2_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setSkew_2_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "05be7844e9afdd7b9bfc31c5423a70a2" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setSkewX' > setSkewX< / a > < a href = '#SkMatrix_setSkewY' > setSkewY< / a > < a href = '#SkMatrix_preSkew' > preSkew< / a > < a href = '#SkMatrix_postSkew' > postSkew< / a >
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< a name = 'SkMatrix_setConcat' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setConcat' > setConcat< / a > (< a href = '#SkMatrix_setConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_setConcat_a' > a< / a > < a href = '#SkMatrix_setConcat_a' > multiplied< / a > < a href = '#SkMatrix_setConcat_a' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_setConcat_b' > b< / a > . < a href = '#SkMatrix_setConcat_b' > Either< / a > < a href = '#SkMatrix_setConcat_a' > a< / a > < a href = '#SkMatrix_setConcat_a' > or< / a > < a href = '#SkMatrix_setConcat_b' > b< / a > < a href = '#SkMatrix_setConcat_b' > may< / a > < a href = '#SkMatrix_setConcat_b' > be< / a > < a href = '#SkMatrix_setConcat_b' > this< / a > .
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Given:
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| A B C | | J K L |
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< a href = '#SkMatrix_setConcat_a' > a< / a > = | < a href = '#SkMatrix_setConcat_a' > D< / a > < a href = '#SkMatrix_setConcat_a' > E< / a > < a href = '#SkMatrix_setConcat_a' > F< / a > |, < a href = '#SkMatrix_setConcat_b' > b< / a > = | < a href = '#SkMatrix_setConcat_b' > M< / a > < a href = '#SkMatrix_setConcat_b' > N< / a > < a href = '#SkMatrix_setConcat_b' > O< / a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR |
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< a href = '#SkMatrix_setConcat_a' > a</ a > * <a href='#SkMatrix_setConcat_b'>b</a> = | <a href='#SkMatrix_setConcat_b'>D</a> <a href='#SkMatrix_setConcat_b'>E</a> <a href='#SkMatrix_setConcat_b'>F</a> | * | < a href = '#SkMatrix_setConcat_b' > M</ a > < a href = '#SkMatrix_setConcat_b' > N</ a > < a href = '#SkMatrix_setConcat_b' > O</ a > | = | < a href = '#SkMatrix_setConcat_b' > DJ</ a > +< a href = '#SkMatrix_setConcat_b' > EM</ a > +< a href = '#SkMatrix_setConcat_b' > FP</ a > < a href = '#SkMatrix_setConcat_b' > DK</ a > +< a href = '#SkMatrix_setConcat_b' > EN</ a > +< a href = '#SkMatrix_setConcat_b' > FQ</ a > < a href = '#SkMatrix_setConcat_b' > DL</ a > +< a href = '#SkMatrix_setConcat_b' > EO</ a > +< a href = '#SkMatrix_setConcat_b' > FR</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > | | < a href = '#SkMatrix_I' > GJ< / a > +< a href = '#SkMatrix_I' > HM< / a > +< a href = '#SkMatrix_I' > IP< / a > < a href = '#SkMatrix_I' > GK< / a > +< a href = '#SkMatrix_I' > HN< / a > +< a href = '#SkMatrix_I' > IQ< / a > < a href = '#SkMatrix_I' > GL< / a > +< a href = '#SkMatrix_I' > HO< / a > +< a href = '#SkMatrix_I' > IR< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setConcat_a' > < code > < strong > a< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > left side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setConcat_b' > < code > < strong > b< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > right side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "0381a10ac69bdefdf9d15b47cbb9fefe" > < div > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > < a href = '#SkMatrix_setPolyToPoly' > creates< / a > < a href = '#SkMatrix_setPolyToPoly' > perspective< / a > < a href = 'SkMatrix_Reference#Matrix' > matrices< / a > , < a href = 'SkMatrix_Reference#Matrix' > one< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > other< / a > .
< a href = 'SkMatrix_Reference#Matrix' > Multiplying< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a > < a href = 'SkMatrix_Reference#Matrix' > its< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > turns< / a > < a href = 'SkMatrix_Reference#Matrix' > into< / a > < a href = 'SkMatrix_Reference#Matrix' > an< / a > < a href = 'SkMatrix_Reference#Matrix' > identity< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_Concat' > Concat< / a > < a href = '#SkMatrix_preConcat' > preConcat< / a > < a href = '#SkMatrix_postConcat' > postConcat< / a > < a href = 'SkCanvas_Reference#SkCanvas' > SkCanvas< / a > ::< a href = '#SkCanvas_concat' > concat< / a >
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< a name = 'SkMatrix_preTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preTranslate' > preTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > (< a href = '#SkMatrix_preTranslate_dx' > dx< / a > , < a href = '#SkMatrix_preTranslate_dy' > dy< / a > ).
This can be thought of as moving the < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > to< / a > < a href = 'SkPoint_Reference#Point' > be< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > before< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | 1 0 < a href = '#SkMatrix_preTranslate_dx' > dx< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > T< / a > (< a href = '#SkMatrix_preTranslate_dx' > dx< / a > , < a href = '#SkMatrix_preTranslate_dy' > dy< / a > ) = | 0 1 < a href = '#SkMatrix_preTranslate_dy' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | 1 0 < a href = '#SkMatrix_preTranslate_dx' > dx< / a > | | < a href = '#SkMatrix_preTranslate_dx' > A< / a > < a href = '#SkMatrix_preTranslate_dx' > B< / a > < a href = '#SkMatrix_preTranslate_dx' > A< / a > *< a href = '#SkMatrix_preTranslate_dx' > dx< / a > +< a href = '#SkMatrix_preTranslate_dx' > B< / a > *< a href = '#SkMatrix_preTranslate_dy' > dy< / a > +< a href = '#SkMatrix_preTranslate_dy' > C< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>T</a>(<a href='#SkMatrix_preTranslate_dx'>dx</a>, <a href='#SkMatrix_preTranslate_dy'>dy</a>) = | <a href='#SkMatrix_preTranslate_dy'>D</a> <a href='#SkMatrix_preTranslate_dy'>E</a> <a href='#SkMatrix_preTranslate_dy'>F</a> | | 0 1 <a href='#SkMatrix_preTranslate_dy'>dy</a> | = | <a href='#SkMatrix_preTranslate_dy'>D</a> <a href='#SkMatrix_preTranslate_dy'>E</a> <a href='#SkMatrix_preTranslate_dy'>D</a>* < a href = '#SkMatrix_preTranslate_dx' > dx</ a > +< a href = '#SkMatrix_preTranslate_dx' > E</ a > *< a href = '#SkMatrix_preTranslate_dy' > dy</ a > +< a href = '#SkMatrix_preTranslate_dy' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > G< / a > < a href = '#SkMatrix_I' > H< / a > < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_preTranslate_dx' > dx< / a > +< a href = '#SkMatrix_preTranslate_dx' > H< / a > *< a href = '#SkMatrix_preTranslate_dy' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preTranslate_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
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< td > x-axis translation before applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_preTranslate_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
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< td > y-axis translation before applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "f75a9b629aa6c51ed888f8799b5ba5f7" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_postTranslate' > postTranslate< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_MakeTrans' > MakeTrans< / a >
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< a name = 'SkMatrix_preScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preScale' > preScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_preScale_sx' > sx< / a > , < a href = '#SkMatrix_preScale_sy' > sy< / a > )
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (< a href = '#SkMatrix_preScale_px' > px< / a > , < a href = '#SkMatrix_preScale_py' > py< / a > ).
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This can be thought of as scaling about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > before< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | < a href = '#SkMatrix_preScale_sx' > sx< / a > 0 < a href = '#SkMatrix_preScale_sx' > dx< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > S< / a > (< a href = '#SkMatrix_preScale_sx' > sx< / a > , < a href = '#SkMatrix_preScale_sy' > sy< / a > , < a href = '#SkMatrix_preScale_px' > px< / a > , < a href = '#SkMatrix_preScale_py' > py< / a > ) = | 0 < a href = '#SkMatrix_preScale_sy' > sy< / a > < a href = '#SkMatrix_preScale_sy' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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where
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dx = < a href = '#SkMatrix_preScale_px' > px< / a > - < a href = '#SkMatrix_preScale_sx' > sx< / a > * < a href = '#SkMatrix_preScale_px' > px< / a >
dy = < a href = '#SkMatrix_preScale_py' > py< / a > - < a href = '#SkMatrix_preScale_sy' > sy< / a > * < a href = '#SkMatrix_preScale_py' > py< / a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | < a href = '#SkMatrix_preScale_sx' > sx< / a > 0 < a href = '#SkMatrix_preScale_sx' > dx< / a > | | < a href = '#SkMatrix_preScale_sx' > A< / a > *< a href = '#SkMatrix_preScale_sx' > sx< / a > < a href = '#SkMatrix_preScale_sx' > B< / a > *< a href = '#SkMatrix_preScale_sy' > sy< / a > < a href = '#SkMatrix_preScale_sy' > A< / a > *< a href = '#SkMatrix_preScale_sy' > dx< / a > +< a href = '#SkMatrix_preScale_sy' > B< / a > *< a href = '#SkMatrix_preScale_sy' > dy< / a > +< a href = '#SkMatrix_preScale_sy' > C< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>S</a>(<a href='#SkMatrix_preScale_sx'>sx</a>, <a href='#SkMatrix_preScale_sy'>sy</a>, <a href='#SkMatrix_preScale_px'>px</a>, <a href='#SkMatrix_preScale_py'>py</a>) = | <a href='#SkMatrix_preScale_py'>D</a> <a href='#SkMatrix_preScale_py'>E</a> <a href='#SkMatrix_preScale_py'>F</a> | | 0 <a href='#SkMatrix_preScale_sy'>sy</a> <a href='#SkMatrix_preScale_sy'>dy</a> | = | <a href='#SkMatrix_preScale_sy'>D</a>* < a href = '#SkMatrix_preScale_sx' > sx</ a > < a href = '#SkMatrix_preScale_sx' > E</ a > *< a href = '#SkMatrix_preScale_sy' > sy</ a > < a href = '#SkMatrix_preScale_sy' > D</ a > *< a href = '#SkMatrix_preScale_sy' > dx</ a > +< a href = '#SkMatrix_preScale_sy' > E</ a > *< a href = '#SkMatrix_preScale_sy' > dy</ a > +< a href = '#SkMatrix_preScale_sy' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_preScale_sx' > sx< / a > < a href = '#SkMatrix_preScale_sx' > H< / a > *< a href = '#SkMatrix_preScale_sy' > sy< / a > < a href = '#SkMatrix_preScale_sy' > G< / a > *< a href = '#SkMatrix_preScale_sy' > dx< / a > +< a href = '#SkMatrix_preScale_sy' > H< / a > *< a href = '#SkMatrix_preScale_sy' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preScale_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preScale_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preScale_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_preScale_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "2531f8d1e05d7b6dc22f3efcd2fb84e4" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_postScale' > postScale< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_preScale_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preScale' > preScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_preScale_2_sx' > sx< / a > , < a href = '#SkMatrix_preScale_2_sy' > sy< / a > )
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (0, 0).
This can be thought of as scaling about the origin before applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | < a href = '#SkMatrix_preScale_2_sx' > sx< / a > 0 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > S< / a > (< a href = '#SkMatrix_preScale_2_sx' > sx< / a > , < a href = '#SkMatrix_preScale_2_sy' > sy< / a > ) = | 0 < a href = '#SkMatrix_preScale_2_sy' > sy< / a > 0 |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | < a href = '#SkMatrix_preScale_2_sx' > sx< / a > 0 0 | | < a href = '#SkMatrix_preScale_2_sx' > A< / a > *< a href = '#SkMatrix_preScale_2_sx' > sx< / a > < a href = '#SkMatrix_preScale_2_sx' > B< / a > *< a href = '#SkMatrix_preScale_2_sy' > sy< / a > < a href = '#SkMatrix_preScale_2_sy' > C< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>S</a>(<a href='#SkMatrix_preScale_2_sx'>sx</a>, <a href='#SkMatrix_preScale_2_sy'>sy</a>) = | <a href='#SkMatrix_preScale_2_sy'>D</a> <a href='#SkMatrix_preScale_2_sy'>E</a> <a href='#SkMatrix_preScale_2_sy'>F</a> | | 0 <a href='#SkMatrix_preScale_2_sy'>sy</a> 0 | = | <a href='#SkMatrix_preScale_2_sy'>D</a>* < a href = '#SkMatrix_preScale_2_sx' > sx</ a > < a href = '#SkMatrix_preScale_2_sx' > E</ a > *< a href = '#SkMatrix_preScale_2_sy' > sy</ a > < a href = '#SkMatrix_preScale_2_sy' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_preScale_2_sx' > sx< / a > < a href = '#SkMatrix_preScale_2_sx' > H< / a > *< a href = '#SkMatrix_preScale_2_sy' > sy< / a > < a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preScale_2_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preScale_2_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "3edbdea8e43d06086abf33ec4a9b415b" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_postScale' > postScale< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_preRotate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preRotate' > preRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_preRotate_degrees' > degrees< / a >
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (< a href = '#SkMatrix_preRotate_px' > px< / a > , < a href = '#SkMatrix_preRotate_py' > py< / a > ).
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This can be thought of as rotating about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > before< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Positive < a href = '#SkMatrix_preRotate_degrees' > degrees< / a > < a href = '#SkMatrix_preRotate_degrees' > rotates< / a > < a href = '#SkMatrix_preRotate_degrees' > clockwise< / a > .
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Given:
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| A B C | | c -s dx |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > R< / a > (< a href = '#SkMatrix_preRotate_degrees' > degrees< / a > , < a href = '#SkMatrix_preRotate_px' > px< / a > , < a href = '#SkMatrix_preRotate_py' > py< / a > ) = | < a href = '#SkMatrix_preRotate_py' > s< / a > < a href = '#SkMatrix_preRotate_py' > c< / a > < a href = '#SkMatrix_preRotate_py' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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where
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c = cos(< a href = '#SkMatrix_preRotate_degrees' > degrees< / a > )
s = sin(< a href = '#SkMatrix_preRotate_degrees' > degrees< / a > )
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dx = s * <a href='#SkMatrix_preRotate_py'>py</a> + (1 - <a href='#SkMatrix_preRotate_py'>c</a>) * < a href = '#SkMatrix_preRotate_px' > px</ a >
dy = -s * <a href='#SkMatrix_preRotate_px'>px</a> + (1 - <a href='#SkMatrix_preRotate_px'>c</a>) * < a href = '#SkMatrix_preRotate_py' > py</ a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | c -s dx | | Ac+Bs -As+Bc A*dx+B*dy+C |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>R</a>(<a href='#SkMatrix_preRotate_degrees'>degrees</a>, <a href='#SkMatrix_preRotate_px'>px</a>, <a href='#SkMatrix_preRotate_py'>py</a>) = | <a href='#SkMatrix_preRotate_py'>D</a> <a href='#SkMatrix_preRotate_py'>E</a> <a href='#SkMatrix_preRotate_py'>F</a> | | <a href='#SkMatrix_preRotate_py'>s</a> <a href='#SkMatrix_preRotate_py'>c</a> <a href='#SkMatrix_preRotate_py'>dy</a> | = | <a href='#SkMatrix_preRotate_py'>Dc</a>+<a href='#SkMatrix_preRotate_py'>Es</a> -<a href='#SkMatrix_preRotate_py'>Ds</a>+<a href='#SkMatrix_preRotate_py'>Ec</a> <a href='#SkMatrix_preRotate_py'>D</a>* < a href = '#SkMatrix_preRotate_py' > dx</ a > +< a href = '#SkMatrix_preRotate_py' > E</ a > *< a href = '#SkMatrix_preRotate_py' > dy</ a > +< a href = '#SkMatrix_preRotate_py' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > Gc< / a > +< a href = '#SkMatrix_I' > Hs< / a > -< a href = '#SkMatrix_I' > Gs< / a > +< a href = '#SkMatrix_I' > Hc< / a > < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_I' > dx< / a > +< a href = '#SkMatrix_I' > H< / a > *< a href = '#SkMatrix_I' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preRotate_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preRotate_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_preRotate_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "a70bb18d67c06a20ab514e7a47924e5a" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_postRotate' > postRotate< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a >
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< a name = 'SkMatrix_preRotate_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preRotate' > preRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a >
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (0, 0).
This can be thought of as rotating about the origin before applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Positive < a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a > < a href = '#SkMatrix_preRotate_2_degrees' > rotates< / a > < a href = '#SkMatrix_preRotate_2_degrees' > clockwise< / a > .
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Given:
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| A B C | | c -s 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > R< / a > (< a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a > , < a href = '#SkMatrix_preRotate_2_degrees' > px< / a > , < a href = '#SkMatrix_preRotate_2_degrees' > py< / a > ) = | < a href = '#SkMatrix_preRotate_2_degrees' > s< / a > < a href = '#SkMatrix_preRotate_2_degrees' > c< / a > 0 |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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where
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c = cos(< a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a > )
s = sin(< a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a > )
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | c -s 0 | | Ac+Bs -As+Bc C |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > R< / a > (< a href = '#SkMatrix_preRotate_2_degrees' > degrees< / a > , < a href = '#SkMatrix_preRotate_2_degrees' > px< / a > , < a href = '#SkMatrix_preRotate_2_degrees' > py< / a > ) = | < a href = '#SkMatrix_preRotate_2_degrees' > D< / a > < a href = '#SkMatrix_preRotate_2_degrees' > E< / a > < a href = '#SkMatrix_preRotate_2_degrees' > F< / a > | | < a href = '#SkMatrix_preRotate_2_degrees' > s< / a > < a href = '#SkMatrix_preRotate_2_degrees' > c< / a > 0 | = | < a href = '#SkMatrix_preRotate_2_degrees' > Dc< / a > +< a href = '#SkMatrix_preRotate_2_degrees' > Es< / a > -< a href = '#SkMatrix_preRotate_2_degrees' > Ds< / a > +< a href = '#SkMatrix_preRotate_2_degrees' > Ec< / a > < a href = '#SkMatrix_preRotate_2_degrees' > F< / a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > Gc< / a > +< a href = '#SkMatrix_I' > Hs< / a > -< a href = '#SkMatrix_I' > Gs< / a > +< a href = '#SkMatrix_I' > Hc< / a > < a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preRotate_2_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "5acd49bd931c79a808dd6c7cc0e92f72" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_postRotate' > postRotate< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a >
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< a name = 'SkMatrix_preSkew' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preSkew' > preSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_preSkew_kx' > kx< / a > , < a href = '#SkMatrix_preSkew_ky' > ky< / a > )
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (< a href = '#SkMatrix_preSkew_px' > px< / a > , < a href = '#SkMatrix_preSkew_py' > py< / a > ).
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This can be thought of as skewing about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > before< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | 1 < a href = '#SkMatrix_preSkew_kx' > kx< / a > < a href = '#SkMatrix_preSkew_kx' > dx< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > K< / a > (< a href = '#SkMatrix_preSkew_kx' > kx< / a > , < a href = '#SkMatrix_preSkew_ky' > ky< / a > , < a href = '#SkMatrix_preSkew_px' > px< / a > , < a href = '#SkMatrix_preSkew_py' > py< / a > ) = | < a href = '#SkMatrix_preSkew_ky' > ky< / a > 1 < a href = '#SkMatrix_preSkew_ky' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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where
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dx = -< a href = '#SkMatrix_preSkew_kx' > kx< / a > * < a href = '#SkMatrix_preSkew_py' > py< / a >
dy = -< a href = '#SkMatrix_preSkew_ky' > ky< / a > * < a href = '#SkMatrix_preSkew_px' > px< / a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | 1 < a href = '#SkMatrix_preSkew_kx' > kx< / a > < a href = '#SkMatrix_preSkew_kx' > dx< / a > | | < a href = '#SkMatrix_preSkew_kx' > A< / a > +< a href = '#SkMatrix_preSkew_kx' > B< / a > *< a href = '#SkMatrix_preSkew_ky' > ky< / a > < a href = '#SkMatrix_preSkew_ky' > A< / a > *< a href = '#SkMatrix_preSkew_kx' > kx< / a > +< a href = '#SkMatrix_preSkew_kx' > B< / a > < a href = '#SkMatrix_preSkew_kx' > A< / a > *< a href = '#SkMatrix_preSkew_kx' > dx< / a > +< a href = '#SkMatrix_preSkew_kx' > B< / a > *< a href = '#SkMatrix_preSkew_kx' > dy< / a > +< a href = '#SkMatrix_preSkew_kx' > C< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>K</a>(<a href='#SkMatrix_preSkew_kx'>kx</a>, <a href='#SkMatrix_preSkew_ky'>ky</a>, <a href='#SkMatrix_preSkew_px'>px</a>, <a href='#SkMatrix_preSkew_py'>py</a>) = | <a href='#SkMatrix_preSkew_py'>D</a> <a href='#SkMatrix_preSkew_py'>E</a> <a href='#SkMatrix_preSkew_py'>F</a> | | <a href='#SkMatrix_preSkew_ky'>ky</a> 1 <a href='#SkMatrix_preSkew_ky'>dy</a> | = | <a href='#SkMatrix_preSkew_ky'>D</a>+<a href='#SkMatrix_preSkew_ky'>E</a>* < a href = '#SkMatrix_preSkew_ky' > ky</ a > < a href = '#SkMatrix_preSkew_ky' > D</ a > *< a href = '#SkMatrix_preSkew_kx' > kx</ a > +< a href = '#SkMatrix_preSkew_kx' > E</ a > < a href = '#SkMatrix_preSkew_kx' > D</ a > *< a href = '#SkMatrix_preSkew_kx' > dx</ a > +< a href = '#SkMatrix_preSkew_kx' > E</ a > *< a href = '#SkMatrix_preSkew_kx' > dy</ a > +< a href = '#SkMatrix_preSkew_kx' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > G< / a > +< a href = '#SkMatrix_I' > H< / a > *< a href = '#SkMatrix_preSkew_ky' > ky< / a > < a href = '#SkMatrix_preSkew_ky' > G< / a > *< a href = '#SkMatrix_preSkew_kx' > kx< / a > +< a href = '#SkMatrix_preSkew_kx' > H< / a > < a href = '#SkMatrix_preSkew_kx' > G< / a > *< a href = '#SkMatrix_preSkew_kx' > dx< / a > +< a href = '#SkMatrix_preSkew_kx' > H< / a > *< a href = '#SkMatrix_preSkew_kx' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preSkew_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preSkew_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preSkew_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_preSkew_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "199a18ad61d702664ce6df1d7037aa48" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_postSkew' > postSkew< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_preSkew_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preSkew' > preSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_preSkew_2_kx' > kx< / a > , < a href = '#SkMatrix_preSkew_2_ky' > ky< / a > )
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about pivot < a href = 'SkPoint_Reference#Point' > point< / a > (0, 0).
This can be thought of as skewing about the origin before applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | 1 < a href = '#SkMatrix_preSkew_2_kx' > kx< / a > 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > K< / a > (< a href = '#SkMatrix_preSkew_2_kx' > kx< / a > , < a href = '#SkMatrix_preSkew_2_ky' > ky< / a > ) = | < a href = '#SkMatrix_preSkew_2_ky' > ky< / a > 1 0 |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | 1 < a href = '#SkMatrix_preSkew_2_kx' > kx< / a > 0 | | < a href = '#SkMatrix_preSkew_2_kx' > A< / a > +< a href = '#SkMatrix_preSkew_2_kx' > B< / a > *< a href = '#SkMatrix_preSkew_2_ky' > ky< / a > < a href = '#SkMatrix_preSkew_2_ky' > A< / a > *< a href = '#SkMatrix_preSkew_2_kx' > kx< / a > +< a href = '#SkMatrix_preSkew_2_kx' > B< / a > < a href = '#SkMatrix_preSkew_2_kx' > C< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>K</a>(<a href='#SkMatrix_preSkew_2_kx'>kx</a>, <a href='#SkMatrix_preSkew_2_ky'>ky</a>) = | <a href='#SkMatrix_preSkew_2_ky'>D</a> <a href='#SkMatrix_preSkew_2_ky'>E</a> <a href='#SkMatrix_preSkew_2_ky'>F</a> | | <a href='#SkMatrix_preSkew_2_ky'>ky</a> 1 0 | = | <a href='#SkMatrix_preSkew_2_ky'>D</a>+<a href='#SkMatrix_preSkew_2_ky'>E</a>* < a href = '#SkMatrix_preSkew_2_ky' > ky</ a > < a href = '#SkMatrix_preSkew_2_ky' > D</ a > *< a href = '#SkMatrix_preSkew_2_kx' > kx</ a > +< a href = '#SkMatrix_preSkew_2_kx' > E</ a > < a href = '#SkMatrix_preSkew_2_kx' > F</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | 0 0 1 | | < a href = '#SkMatrix_I' > G< / a > +< a href = '#SkMatrix_I' > H< / a > *< a href = '#SkMatrix_preSkew_2_ky' > ky< / a > < a href = '#SkMatrix_preSkew_2_ky' > G< / a > *< a href = '#SkMatrix_preSkew_2_kx' > kx< / a > +< a href = '#SkMatrix_preSkew_2_kx' > H< / a > < a href = '#SkMatrix_I' > I< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preSkew_2_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_preSkew_2_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "e100c543869fe8fd516ba69de79444ba" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_postSkew' > postSkew< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_preConcat' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_preConcat' > preConcat< / a > (< a href = '#SkMatrix_preConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > other< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiplied< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_preConcat_other' > other< / a > .
This can be thought of mapping by < a href = '#SkMatrix_preConcat_other' > other< / a > < a href = '#SkMatrix_preConcat_other' > before< / a > < a href = '#SkMatrix_preConcat_other' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| A B C | | J K L |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = '#SkMatrix_preConcat_other' > other< / a > = | < a href = '#SkMatrix_preConcat_other' > M< / a > < a href = '#SkMatrix_preConcat_other' > N< / a > < a href = '#SkMatrix_preConcat_other' > O< / a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='#SkMatrix_preConcat_other'>other</a> = | <a href='#SkMatrix_preConcat_other'>D</a> <a href='#SkMatrix_preConcat_other'>E</a> <a href='#SkMatrix_preConcat_other'>F</a> | * | < a href = '#SkMatrix_preConcat_other' > M</ a > < a href = '#SkMatrix_preConcat_other' > N</ a > < a href = '#SkMatrix_preConcat_other' > O</ a > | = | < a href = '#SkMatrix_preConcat_other' > DJ</ a > +< a href = '#SkMatrix_preConcat_other' > EM</ a > +< a href = '#SkMatrix_preConcat_other' > FP</ a > < a href = '#SkMatrix_preConcat_other' > DK</ a > +< a href = '#SkMatrix_preConcat_other' > EN</ a > +< a href = '#SkMatrix_preConcat_other' > FQ</ a > < a href = '#SkMatrix_preConcat_other' > DL</ a > +< a href = '#SkMatrix_preConcat_other' > EO</ a > +< a href = '#SkMatrix_preConcat_other' > FR</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > | | < a href = '#SkMatrix_I' > GJ< / a > +< a href = '#SkMatrix_I' > HM< / a > +< a href = '#SkMatrix_I' > IP< / a > < a href = '#SkMatrix_I' > GK< / a > +< a href = '#SkMatrix_I' > HN< / a > +< a href = '#SkMatrix_I' > IQ< / a > < a href = '#SkMatrix_I' > GL< / a > +< a href = '#SkMatrix_I' > HO< / a > +< a href = '#SkMatrix_I' > IR< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_preConcat_other' > < code > < strong > other< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > right side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "b07e62298e7b0ab5683db199faffceb2" > < div > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > < a href = '#SkMatrix_setPolyToPoly' > creates< / a > < a href = '#SkMatrix_setPolyToPoly' > perspective< / a > < a href = 'SkMatrix_Reference#Matrix' > matrices< / a > , < a href = 'SkMatrix_Reference#Matrix' > one< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = '#SkMatrix_preConcat_other' > other< / a > .
< a href = '#SkMatrix_preConcat_other' > Multiplying< / a > < a href = '#SkMatrix_preConcat_other' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a > < a href = 'SkMatrix_Reference#Matrix' > its< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > turns< / a > < a href = 'SkMatrix_Reference#Matrix' > into< / a > < a href = 'SkMatrix_Reference#Matrix' > an< / a > < a href = 'SkMatrix_Reference#Matrix' > identity< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_postConcat' > postConcat< / a > < a href = '#SkMatrix_setConcat' > setConcat< / a > < a href = '#SkMatrix_Concat' > Concat< / a >
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< a name = 'SkMatrix_postTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postTranslate' > postTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > (< a href = '#SkMatrix_postTranslate_dx' > dx< / a > , < a href = '#SkMatrix_postTranslate_dy' > dy< / a > ) < a href = '#SkMatrix_postTranslate_dy' > multiplied< / a > < a href = '#SkMatrix_postTranslate_dy' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as moving the < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > to< / a > < a href = 'SkPoint_Reference#Point' > be< / a > < a href = 'SkPoint_Reference#Point' > mapped< / a > < a href = 'SkPoint_Reference#Point' > after< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | 1 0 < a href = '#SkMatrix_postTranslate_dx' > dx< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > T< / a > (< a href = '#SkMatrix_postTranslate_dx' > dx< / a > , < a href = '#SkMatrix_postTranslate_dy' > dy< / a > ) = | 0 1 < a href = '#SkMatrix_postTranslate_dy' > dy< / a > |
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| P Q R | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 0 < a href = '#SkMatrix_postTranslate_dx' > dx< / a > | | < a href = '#SkMatrix_postTranslate_dx' > J< / a > < a href = '#SkMatrix_postTranslate_dx' > K< / a > < a href = '#SkMatrix_postTranslate_dx' > L< / a > | | < a href = '#SkMatrix_postTranslate_dx' > J< / a > +< a href = '#SkMatrix_postTranslate_dx' > dx< / a > *< a href = '#SkMatrix_postTranslate_dx' > P< / a > < a href = '#SkMatrix_postTranslate_dx' > K< / a > +< a href = '#SkMatrix_postTranslate_dx' > dx< / a > *< a href = '#SkMatrix_postTranslate_dx' > Q< / a > < a href = '#SkMatrix_postTranslate_dx' > L< / a > +< a href = '#SkMatrix_postTranslate_dx' > dx< / a > *< a href = '#SkMatrix_postTranslate_dx' > R< / a > |
T(< a href = '#SkMatrix_postTranslate_dx' > dx</ a > , < a href = '#SkMatrix_postTranslate_dy' > dy</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = | 0 1 <a href='#SkMatrix_postTranslate_dy'>dy</a> | | <a href='#SkMatrix_postTranslate_dy'>M</a> <a href='#SkMatrix_postTranslate_dy'>N</a> <a href='#SkMatrix_postTranslate_dy'>O</a> | = | <a href='#SkMatrix_postTranslate_dy'>M</a>+<a href='#SkMatrix_postTranslate_dy'>dy</a>* < a href = '#SkMatrix_postTranslate_dy' > P</ a > < a href = '#SkMatrix_postTranslate_dy' > N</ a > +< a href = '#SkMatrix_postTranslate_dy' > dy</ a > *< a href = '#SkMatrix_postTranslate_dy' > Q</ a > < a href = '#SkMatrix_postTranslate_dy' > O</ a > +< a href = '#SkMatrix_postTranslate_dy' > dy</ a > *< a href = '#SkMatrix_postTranslate_dy' > R</ a > |
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| 0 0 1 | | P Q R | | P Q R |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postTranslate_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
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< td > x-axis translation after applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_postTranslate_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
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< td > y-axis translation after applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "f5144ef4bd7cea294fad2f756ed335af" > < div > Compare with < a href = '#SkMatrix_preTranslate' > preTranslate< / a > < a href = '#SkMatrix_preTranslate' > example< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_preTranslate' > preTranslate< / a > < a href = '#SkMatrix_setTranslate' > setTranslate< / a > < a href = '#SkMatrix_MakeTrans' > MakeTrans< / a >
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< a name = 'SkMatrix_postScale' > < / a >
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---
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2018-05-16 11:07:07 +00:00
< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postScale' > postScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_postScale_sx' > sx< / a > , < a href = '#SkMatrix_postScale_sy' > sy< / a > ) < a href = '#SkMatrix_postScale_sy' > about< / a > < a href = '#SkMatrix_postScale_sy' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
(< a href = '#SkMatrix_postScale_px' > px< / a > , < a href = '#SkMatrix_postScale_py' > py< / a > ), < a href = '#SkMatrix_postScale_py' > multiplied< / a > < a href = '#SkMatrix_postScale_py' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as scaling about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > after< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | < a href = '#SkMatrix_postScale_sx' > sx< / a > 0 < a href = '#SkMatrix_postScale_sx' > dx< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > S< / a > (< a href = '#SkMatrix_postScale_sx' > sx< / a > , < a href = '#SkMatrix_postScale_sy' > sy< / a > , < a href = '#SkMatrix_postScale_px' > px< / a > , < a href = '#SkMatrix_postScale_py' > py< / a > ) = | 0 < a href = '#SkMatrix_postScale_sy' > sy< / a > < a href = '#SkMatrix_postScale_sy' > dy< / a > |
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| P Q R | | 0 0 1 |
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where
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dx = < a href = '#SkMatrix_postScale_px' > px< / a > - < a href = '#SkMatrix_postScale_sx' > sx< / a > * < a href = '#SkMatrix_postScale_px' > px< / a >
dy = < a href = '#SkMatrix_postScale_py' > py< / a > - < a href = '#SkMatrix_postScale_sy' > sy< / a > * < a href = '#SkMatrix_postScale_py' > py< / a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| < a href = '#SkMatrix_postScale_sx' > sx< / a > 0 < a href = '#SkMatrix_postScale_sx' > dx< / a > | | < a href = '#SkMatrix_postScale_sx' > J< / a > < a href = '#SkMatrix_postScale_sx' > K< / a > < a href = '#SkMatrix_postScale_sx' > L< / a > | | < a href = '#SkMatrix_postScale_sx' > sx< / a > *< a href = '#SkMatrix_postScale_sx' > J< / a > +< a href = '#SkMatrix_postScale_sx' > dx< / a > *< a href = '#SkMatrix_postScale_sx' > P< / a > < a href = '#SkMatrix_postScale_sx' > sx< / a > *< a href = '#SkMatrix_postScale_sx' > K< / a > +< a href = '#SkMatrix_postScale_sx' > dx< / a > *< a href = '#SkMatrix_postScale_sx' > Q< / a > < a href = '#SkMatrix_postScale_sx' > sx< / a > *< a href = '#SkMatrix_postScale_sx' > L< / a > +< a href = '#SkMatrix_postScale_sx' > dx< / a > +< a href = '#SkMatrix_postScale_sx' > R< / a > |
S(< a href = '#SkMatrix_postScale_sx' > sx</ a > , < a href = '#SkMatrix_postScale_sy' > sy</ a > , < a href = '#SkMatrix_postScale_px' > px</ a > , < a href = '#SkMatrix_postScale_py' > py</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = | 0 <a href='#SkMatrix_postScale_sy'>sy</a> <a href='#SkMatrix_postScale_sy'>dy</a> | | <a href='#SkMatrix_postScale_sy'>M</a> <a href='#SkMatrix_postScale_sy'>N</a> <a href='#SkMatrix_postScale_sy'>O</a> | = | <a href='#SkMatrix_postScale_sy'>sy</a>* < a href = '#SkMatrix_postScale_sy' > M</ a > +< a href = '#SkMatrix_postScale_sy' > dy</ a > *< a href = '#SkMatrix_postScale_sy' > P</ a > < a href = '#SkMatrix_postScale_sy' > sy</ a > *< a href = '#SkMatrix_postScale_sy' > N</ a > +< a href = '#SkMatrix_postScale_sy' > dy</ a > *< a href = '#SkMatrix_postScale_sy' > Q</ a > < a href = '#SkMatrix_postScale_sy' > sy</ a > *< a href = '#SkMatrix_postScale_sy' > O</ a > +< a href = '#SkMatrix_postScale_sy' > dy</ a > *< a href = '#SkMatrix_postScale_sy' > R</ a > |
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| 0 0 1 | | P Q R | | P Q R |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postScale_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postScale_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postScale_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_postScale_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "ed3aa18ba0ea95c85cc49aa3829fe384" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_preScale' > preScale< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_postScale_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postScale' > postScale< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_postScale_2_sx' > sx< / a > , < a href = '#SkMatrix_postScale_2_sy' > sy< / a > ) < a href = '#SkMatrix_postScale_2_sy' > about< / a > < a href = '#SkMatrix_postScale_2_sy' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
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(0, 0), multiplied by < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as scaling about the origin after applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | < a href = '#SkMatrix_postScale_2_sx' > sx< / a > 0 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > S< / a > (< a href = '#SkMatrix_postScale_2_sx' > sx< / a > , < a href = '#SkMatrix_postScale_2_sy' > sy< / a > ) = | 0 < a href = '#SkMatrix_postScale_2_sy' > sy< / a > 0 |
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| P Q R | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| < a href = '#SkMatrix_postScale_2_sx' > sx< / a > 0 0 | | < a href = '#SkMatrix_postScale_2_sx' > J< / a > < a href = '#SkMatrix_postScale_2_sx' > K< / a > < a href = '#SkMatrix_postScale_2_sx' > L< / a > | | < a href = '#SkMatrix_postScale_2_sx' > sx< / a > *< a href = '#SkMatrix_postScale_2_sx' > J< / a > < a href = '#SkMatrix_postScale_2_sx' > sx< / a > *< a href = '#SkMatrix_postScale_2_sx' > K< / a > < a href = '#SkMatrix_postScale_2_sx' > sx< / a > *< a href = '#SkMatrix_postScale_2_sx' > L< / a > |
S(< a href = '#SkMatrix_postScale_2_sx' > sx</ a > , < a href = '#SkMatrix_postScale_2_sy' > sy</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = | 0 <a href='#SkMatrix_postScale_2_sy'>sy</a> 0 | | <a href='#SkMatrix_postScale_2_sy'>M</a> <a href='#SkMatrix_postScale_2_sy'>N</a> <a href='#SkMatrix_postScale_2_sy'>O</a> | = | <a href='#SkMatrix_postScale_2_sy'>sy</a>* < a href = '#SkMatrix_postScale_2_sy' > M</ a > < a href = '#SkMatrix_postScale_2_sy' > sy</ a > *< a href = '#SkMatrix_postScale_2_sy' > N</ a > < a href = '#SkMatrix_postScale_2_sy' > sy</ a > *< a href = '#SkMatrix_postScale_2_sy' > O</ a > |
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| 0 0 1 | | P Q R | | P Q R |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postScale_2_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postScale_2_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "1931017698766a67d3a26423453b8095" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preScale' > preScale< / a > < a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_postIDiv' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_postIDiv' > postIDiv< / a > (< a href = '#SkMatrix_postIDiv' > int< / a > < a href = '#SkMatrix_postIDiv' > divx< / a > , < a href = '#SkMatrix_postIDiv' > int< / a > < a href = '#SkMatrix_postIDiv' > divy< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > constructed< / a > < a href = 'SkMatrix_Reference#Matrix' > from< / a > < a href = 'SkMatrix_Reference#Matrix' > scaling< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a > (1/< a href = '#SkMatrix_postIDiv_divx' > divx< / a > , 1/< a href = '#SkMatrix_postIDiv_divy' > divy< / a > ),
< a href = '#SkMatrix_postIDiv_divy' > multiplied< / a > < a href = '#SkMatrix_postIDiv_divy' > by< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > .
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< a href = 'SkMatrix_Reference#Matrix' > Returns< / a > < a href = 'SkMatrix_Reference#Matrix' > false< / a > < a href = 'SkMatrix_Reference#Matrix' > if< / a > < a href = 'SkMatrix_Reference#Matrix' > either< / a > < a href = '#SkMatrix_postIDiv_divx' > divx< / a > < a href = '#SkMatrix_postIDiv_divx' > or< / a > < a href = '#SkMatrix_postIDiv_divy' > divy< / a > < a href = '#SkMatrix_postIDiv_divy' > is< / a > < a href = '#SkMatrix_postIDiv_divy' > zero< / a > .
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< a href = '#SkMatrix_postIDiv_divy' > Given< / a > :
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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| J K L | | sx 0 0 |
Matrix = | M N O |, I(divx, divy) = | 0 sy 0 |
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| P Q R | | 0 0 1 |
< / pre >
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where
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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sx = 1 / divx
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sy = 1 / divy
< / pre >
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sets < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > :
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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| sx 0 0 | | J K L | | sx*J sx*K sx*L |
I(divx, divy) * Matrix = | 0 sy 0 | | M N O | = | sy*M sy*N sy*O |
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| 0 0 1 | | P Q R | | P Q R |
< / pre >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postIDiv_divx' > < code > < strong > divx< / strong > < / code > < / a > < / td >
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< td > integer divisor for inverse scale on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_postIDiv_divy' > < code > < strong > divy< / strong > < / code > < / a > < / td >
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< td > integer divisor for inverse scale on y-axis< / td >
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< / tr >
< / table >
### Return Value
true on successful scale
### Example
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< div > < fiddle-embed name = "e6ad0bd2999613d9e4758b661d45070c" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_postScale' > postScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_postRotate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postRotate' > postRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_postRotate_degrees' > degrees< / a > < a href = '#SkMatrix_postRotate_degrees' > about< / a > < a href = '#SkMatrix_postRotate_degrees' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
(< a href = '#SkMatrix_postRotate_px' > px< / a > , < a href = '#SkMatrix_postRotate_py' > py< / a > ), < a href = '#SkMatrix_postRotate_py' > multiplied< / a > < a href = '#SkMatrix_postRotate_py' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as rotating about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > after< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Positive < a href = '#SkMatrix_postRotate_degrees' > degrees< / a > < a href = '#SkMatrix_postRotate_degrees' > rotates< / a > < a href = '#SkMatrix_postRotate_degrees' > clockwise< / a > .
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Given:
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| J K L | | c -s dx |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > R< / a > (< a href = '#SkMatrix_postRotate_degrees' > degrees< / a > , < a href = '#SkMatrix_postRotate_px' > px< / a > , < a href = '#SkMatrix_postRotate_py' > py< / a > ) = | < a href = '#SkMatrix_postRotate_py' > s< / a > < a href = '#SkMatrix_postRotate_py' > c< / a > < a href = '#SkMatrix_postRotate_py' > dy< / a > |
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| P Q R | | 0 0 1 |
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where
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c = cos(< a href = '#SkMatrix_postRotate_degrees' > degrees< / a > )
s = sin(< a href = '#SkMatrix_postRotate_degrees' > degrees< / a > )
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dx = s * <a href='#SkMatrix_postRotate_py'>py</a> + (1 - <a href='#SkMatrix_postRotate_py'>c</a>) * < a href = '#SkMatrix_postRotate_px' > px</ a >
dy = -s * <a href='#SkMatrix_postRotate_px'>px</a> + (1 - <a href='#SkMatrix_postRotate_px'>c</a>) * < a href = '#SkMatrix_postRotate_py' > py</ a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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|c -s dx| |J K L| |cJ-sM+dx*P cK-sN+dx*Q cL-sO+dx+R|
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R(< a href = '#SkMatrix_postRotate_degrees' > degrees</ a > , < a href = '#SkMatrix_postRotate_px' > px</ a > , < a href = '#SkMatrix_postRotate_py' > py</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = |<a href='SkMatrix_Reference#Matrix'>s</a> <a href='SkMatrix_Reference#Matrix'>c</a> <a href='SkMatrix_Reference#Matrix'>dy</a>| |<a href='SkMatrix_Reference#Matrix'>M</a> <a href='SkMatrix_Reference#Matrix'>N</a> <a href='SkMatrix_Reference#Matrix'>O</a>| = |<a href='SkMatrix_Reference#Matrix'>sJ</a>+<a href='SkMatrix_Reference#Matrix'>cM</a>+<a href='SkMatrix_Reference#Matrix'>dy</a>* < a href = 'SkMatrix_Reference#Matrix' > P</ a > < a href = 'SkMatrix_Reference#Matrix' > sK</ a > +< a href = 'SkMatrix_Reference#Matrix' > cN</ a > +< a href = 'SkMatrix_Reference#Matrix' > dy</ a > *< a href = 'SkMatrix_Reference#Matrix' > Q</ a > < a href = 'SkMatrix_Reference#Matrix' > sL</ a > +< a href = 'SkMatrix_Reference#Matrix' > cO</ a > +< a href = 'SkMatrix_Reference#Matrix' > dy</ a > *< a href = 'SkMatrix_Reference#Matrix' > R</ a > |
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|0 0 1| |P Q R| | P Q R|
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postRotate_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postRotate_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_postRotate_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "e09194ee48a81e7b375ade473d340f0d" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preRotate' > preRotate< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a >
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< a name = 'SkMatrix_postRotate_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postRotate' > postRotate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > degrees< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > rotating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > < a href = '#SkMatrix_postRotate_2_degrees' > about< / a > < a href = '#SkMatrix_postRotate_2_degrees' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
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(0, 0), multiplied by < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as rotating about the origin after applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Positive < a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > < a href = '#SkMatrix_postRotate_2_degrees' > rotates< / a > < a href = '#SkMatrix_postRotate_2_degrees' > clockwise< / a > .
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Given:
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| J K L | | c -s 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > R< / a > (< a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > , < a href = '#SkMatrix_postRotate_2_degrees' > px< / a > , < a href = '#SkMatrix_postRotate_2_degrees' > py< / a > ) = | < a href = '#SkMatrix_postRotate_2_degrees' > s< / a > < a href = '#SkMatrix_postRotate_2_degrees' > c< / a > 0 |
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| P Q R | | 0 0 1 |
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where
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c = cos(< a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > )
s = sin(< a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > )
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| c -s dx | | J K L | | cJ-sM cK-sN cL-sO |
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R(< a href = '#SkMatrix_postRotate_2_degrees' > degrees< / a > , < a href = '#SkMatrix_postRotate_2_degrees' > px< / a > , < a href = '#SkMatrix_postRotate_2_degrees' > py< / a > ) * < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > s< / a > < a href = 'SkMatrix_Reference#Matrix' > c< / a > < a href = 'SkMatrix_Reference#Matrix' > dy< / a > | | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > | = | < a href = 'SkMatrix_Reference#Matrix' > sJ< / a > +< a href = 'SkMatrix_Reference#Matrix' > cM< / a > < a href = 'SkMatrix_Reference#Matrix' > sK< / a > +< a href = 'SkMatrix_Reference#Matrix' > cN< / a > < a href = 'SkMatrix_Reference#Matrix' > sL< / a > +< a href = 'SkMatrix_Reference#Matrix' > cO< / a > |
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| 0 0 1 | | P Q R | | P Q R |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postRotate_2_degrees' > < code > < strong > degrees< / strong > < / code > < / a > < / td >
< td > angle of axes relative to upright axes< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "52e4c53e26971af5576b30de60fa70c2" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preRotate' > preRotate< / a > < a href = '#SkMatrix_setRotate' > setRotate< / a >
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< a name = 'SkMatrix_postSkew' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postSkew' > postSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > px< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > py< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_postSkew_kx' > kx< / a > , < a href = '#SkMatrix_postSkew_ky' > ky< / a > ) < a href = '#SkMatrix_postSkew_ky' > about< / a > < a href = '#SkMatrix_postSkew_ky' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
(< a href = '#SkMatrix_postSkew_px' > px< / a > , < a href = '#SkMatrix_postSkew_py' > py< / a > ), < a href = '#SkMatrix_postSkew_py' > multiplied< / a > < a href = '#SkMatrix_postSkew_py' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as skewing about a pivot < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > after< / a > < a href = 'SkPoint_Reference#Point' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | 1 < a href = '#SkMatrix_postSkew_kx' > kx< / a > < a href = '#SkMatrix_postSkew_kx' > dx< / a > |
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > K< / a > (< a href = '#SkMatrix_postSkew_kx' > kx< / a > , < a href = '#SkMatrix_postSkew_ky' > ky< / a > , < a href = '#SkMatrix_postSkew_px' > px< / a > , < a href = '#SkMatrix_postSkew_py' > py< / a > ) = | < a href = '#SkMatrix_postSkew_ky' > ky< / a > 1 < a href = '#SkMatrix_postSkew_ky' > dy< / a > |
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| P Q R | | 0 0 1 |
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where
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dx = -< a href = '#SkMatrix_postSkew_kx' > kx< / a > * < a href = '#SkMatrix_postSkew_py' > py< / a >
dy = -< a href = '#SkMatrix_postSkew_ky' > ky< / a > * < a href = '#SkMatrix_postSkew_px' > px< / a >
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 < a href = '#SkMatrix_postSkew_kx' > kx< / a > < a href = '#SkMatrix_postSkew_kx' > dx< / a > | |< a href = '#SkMatrix_postSkew_kx' > J< / a > < a href = '#SkMatrix_postSkew_kx' > K< / a > < a href = '#SkMatrix_postSkew_kx' > L< / a > | |< a href = '#SkMatrix_postSkew_kx' > J< / a > +< a href = '#SkMatrix_postSkew_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_kx' > M< / a > +< a href = '#SkMatrix_postSkew_kx' > dx< / a > *< a href = '#SkMatrix_postSkew_kx' > P< / a > < a href = '#SkMatrix_postSkew_kx' > K< / a > +< a href = '#SkMatrix_postSkew_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_kx' > N< / a > +< a href = '#SkMatrix_postSkew_kx' > dx< / a > *< a href = '#SkMatrix_postSkew_kx' > Q< / a > < a href = '#SkMatrix_postSkew_kx' > L< / a > +< a href = '#SkMatrix_postSkew_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_kx' > O< / a > +< a href = '#SkMatrix_postSkew_kx' > dx< / a > +< a href = '#SkMatrix_postSkew_kx' > R< / a > |
K(< a href = '#SkMatrix_postSkew_kx' > kx</ a > , < a href = '#SkMatrix_postSkew_ky' > ky</ a > , < a href = '#SkMatrix_postSkew_px' > px</ a > , < a href = '#SkMatrix_postSkew_py' > py</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = |<a href='#SkMatrix_postSkew_ky'>ky</a> 1 <a href='#SkMatrix_postSkew_ky'>dy</a>| |<a href='#SkMatrix_postSkew_ky'>M</a> <a href='#SkMatrix_postSkew_ky'>N</a> <a href='#SkMatrix_postSkew_ky'>O</a>| = |<a href='#SkMatrix_postSkew_ky'>ky</a>* < a href = '#SkMatrix_postSkew_ky' > J</ a > +< a href = '#SkMatrix_postSkew_ky' > M</ a > +< a href = '#SkMatrix_postSkew_ky' > dy</ a > *< a href = '#SkMatrix_postSkew_ky' > P</ a > < a href = '#SkMatrix_postSkew_ky' > ky</ a > *< a href = '#SkMatrix_postSkew_ky' > K</ a > +< a href = '#SkMatrix_postSkew_ky' > N</ a > +< a href = '#SkMatrix_postSkew_ky' > dy</ a > *< a href = '#SkMatrix_postSkew_ky' > Q</ a > < a href = '#SkMatrix_postSkew_ky' > ky</ a > *< a href = '#SkMatrix_postSkew_ky' > L</ a > +< a href = '#SkMatrix_postSkew_ky' > O</ a > +< a href = '#SkMatrix_postSkew_ky' > dy</ a > *< a href = '#SkMatrix_postSkew_ky' > R</ a > |
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| 0 0 1| |P Q R| | P Q R|
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postSkew_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postSkew_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postSkew_px' > < code > < strong > px< / strong > < / code > < / a > < / td >
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< td > pivot on x-axis< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_postSkew_py' > < code > < strong > py< / strong > < / code > < / a > < / td >
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< td > pivot on y-axis< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "8c34ae3a2b7e2742bb969819737365ec" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preSkew' > preSkew< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_postSkew_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postSkew' > postSkew< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > kx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ky< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > (< a href = '#SkMatrix_postSkew_2_kx' > kx< / a > , < a href = '#SkMatrix_postSkew_2_ky' > ky< / a > ) < a href = '#SkMatrix_postSkew_2_ky' > about< / a > < a href = '#SkMatrix_postSkew_2_ky' > pivot< / a > < a href = 'SkPoint_Reference#Point' > point< / a >
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(0, 0), multiplied by < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of as skewing about the origin after applying < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | 1 < a href = '#SkMatrix_postSkew_2_kx' > kx< / a > 0 |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = 'SkMatrix_Reference#Matrix' > K< / a > (< a href = '#SkMatrix_postSkew_2_kx' > kx< / a > , < a href = '#SkMatrix_postSkew_2_ky' > ky< / a > ) = | < a href = '#SkMatrix_postSkew_2_ky' > ky< / a > 1 0 |
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| P Q R | | 0 0 1 |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 < a href = '#SkMatrix_postSkew_2_kx' > kx< / a > 0 | | < a href = '#SkMatrix_postSkew_2_kx' > J< / a > < a href = '#SkMatrix_postSkew_2_kx' > K< / a > < a href = '#SkMatrix_postSkew_2_kx' > L< / a > | | < a href = '#SkMatrix_postSkew_2_kx' > J< / a > +< a href = '#SkMatrix_postSkew_2_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_2_kx' > M< / a > < a href = '#SkMatrix_postSkew_2_kx' > K< / a > +< a href = '#SkMatrix_postSkew_2_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_2_kx' > N< / a > < a href = '#SkMatrix_postSkew_2_kx' > L< / a > +< a href = '#SkMatrix_postSkew_2_kx' > kx< / a > *< a href = '#SkMatrix_postSkew_2_kx' > O< / a > |
K(< a href = '#SkMatrix_postSkew_2_kx' > kx</ a > , < a href = '#SkMatrix_postSkew_2_ky' > ky</ a > ) * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = | <a href='#SkMatrix_postSkew_2_ky'>ky</a> 1 0 | | <a href='#SkMatrix_postSkew_2_ky'>M</a> <a href='#SkMatrix_postSkew_2_ky'>N</a> <a href='#SkMatrix_postSkew_2_ky'>O</a> | = | <a href='#SkMatrix_postSkew_2_ky'>ky</a>* < a href = '#SkMatrix_postSkew_2_ky' > J</ a > +< a href = '#SkMatrix_postSkew_2_ky' > M</ a > < a href = '#SkMatrix_postSkew_2_ky' > ky</ a > *< a href = '#SkMatrix_postSkew_2_ky' > K</ a > +< a href = '#SkMatrix_postSkew_2_ky' > N</ a > < a href = '#SkMatrix_postSkew_2_ky' > ky</ a > *< a href = '#SkMatrix_postSkew_2_ky' > L</ a > +< a href = '#SkMatrix_postSkew_2_ky' > O</ a > |
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| 0 0 1 | | P Q R | | P Q R |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postSkew_2_kx' > < code > < strong > kx< / strong > < / code > < / a > < / td >
< td > horizontal skew factor< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_postSkew_2_ky' > < code > < strong > ky< / strong > < / code > < / a > < / td >
< td > vertical skew factor< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "3aa2603225dff72ac53dd359f897f494" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_preSkew' > preSkew< / a > < a href = '#SkMatrix_setSkew' > setSkew< / a >
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< a name = 'SkMatrix_postConcat' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_postConcat' > postConcat< / a > (< a href = '#SkMatrix_postConcat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > other< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_postConcat_other' > other< / a > < a href = '#SkMatrix_postConcat_other' > multiplied< / a > < a href = '#SkMatrix_postConcat_other' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
This can be thought of mapping by < a href = '#SkMatrix_postConcat_other' > other< / a > < a href = '#SkMatrix_postConcat_other' > after< / a > < a href = '#SkMatrix_postConcat_other' > applying< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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Given:
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| J K L | | A B C |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > M< / a > < a href = 'SkMatrix_Reference#Matrix' > N< / a > < a href = 'SkMatrix_Reference#Matrix' > O< / a > |, < a href = '#SkMatrix_postConcat_other' > other< / a > = | < a href = '#SkMatrix_postConcat_other' > D< / a > < a href = '#SkMatrix_postConcat_other' > E< / a > < a href = '#SkMatrix_postConcat_other' > F< / a > |
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| P Q R | | G H < a href = '#SkMatrix_I' > I< / a > |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR |
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< a href = '#SkMatrix_postConcat_other' > other</ a > * <a href='SkMatrix_Reference#Matrix'>Matrix</a> = | <a href='SkMatrix_Reference#Matrix'>D</a> <a href='SkMatrix_Reference#Matrix'>E</a> <a href='SkMatrix_Reference#Matrix'>F</a> | * | < a href = 'SkMatrix_Reference#Matrix' > M</ a > < a href = 'SkMatrix_Reference#Matrix' > N</ a > < a href = 'SkMatrix_Reference#Matrix' > O</ a > | = | < a href = 'SkMatrix_Reference#Matrix' > DJ</ a > +< a href = 'SkMatrix_Reference#Matrix' > EM</ a > +< a href = 'SkMatrix_Reference#Matrix' > FP</ a > < a href = 'SkMatrix_Reference#Matrix' > DK</ a > +< a href = 'SkMatrix_Reference#Matrix' > EN</ a > +< a href = 'SkMatrix_Reference#Matrix' > FQ</ a > < a href = 'SkMatrix_Reference#Matrix' > DL</ a > +< a href = 'SkMatrix_Reference#Matrix' > EO</ a > +< a href = 'SkMatrix_Reference#Matrix' > FR</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > | | < a href = '#SkMatrix_I' > GJ< / a > +< a href = '#SkMatrix_I' > HM< / a > +< a href = '#SkMatrix_I' > IP< / a > < a href = '#SkMatrix_I' > GK< / a > +< a href = '#SkMatrix_I' > HN< / a > +< a href = '#SkMatrix_I' > IQ< / a > < a href = '#SkMatrix_I' > GL< / a > +< a href = '#SkMatrix_I' > HO< / a > +< a href = '#SkMatrix_I' > IR< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_postConcat_other' > < code > < strong > other< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > left side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "e4226c55d9bdbc119264bd372b2b9835" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_preConcat' > preConcat< / a > < a href = '#SkMatrix_setConcat' > setConcat< / a > < a href = '#SkMatrix_Concat' > Concat< / a >
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< a name = 'SkMatrix_ScaleToFit' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0 " >
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enum < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > {
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< a href = '#SkMatrix_kFill_ScaleToFit' > kFill_ScaleToFit< / a > ,
< a href = '#SkMatrix_kStart_ScaleToFit' > kStart_ScaleToFit< / a > ,
< a href = '#SkMatrix_kCenter_ScaleToFit' > kCenter_ScaleToFit< / a > ,
< a href = '#SkMatrix_kEnd_ScaleToFit' > kEnd_ScaleToFit< / a > ,
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};
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< / pre >
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< a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > describes< / a > < a href = '#SkMatrix_ScaleToFit' > how< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > is< / a > < a href = 'SkMatrix_Reference#Matrix' > constructed< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > map< / a > < a href = 'SkMatrix_Reference#Matrix' > one< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > another< / a > .
< a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > may< / a > < a href = '#SkMatrix_ScaleToFit' > allow< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > have< / a > < a href = 'SkMatrix_Reference#Matrix' > unequal< / a > < a href = 'SkMatrix_Reference#Matrix' > horizontal< / a > < a href = 'SkMatrix_Reference#Matrix' > and< / a > < a href = 'SkMatrix_Reference#Matrix' > vertical< / a > < a href = 'SkMatrix_Reference#Matrix' > scaling< / a > ,
< a href = 'SkMatrix_Reference#Matrix' > or< / a > < a href = 'SkMatrix_Reference#Matrix' > may< / a > < a href = 'SkMatrix_Reference#Matrix' > restrict< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > square< / a > < a href = 'SkMatrix_Reference#Matrix' > scaling< / a > . < a href = 'SkMatrix_Reference#Matrix' > If< / a > < a href = 'SkMatrix_Reference#Matrix' > restricted< / a > , < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > specifies< / a >
< a href = '#SkMatrix_ScaleToFit' > how< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > maps< / a > < a href = 'SkMatrix_Reference#Matrix' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > side< / a > < a href = 'SkMatrix_Reference#Matrix' > or< / a > < a href = 'SkMatrix_Reference#Matrix' > center< / a > < a href = 'SkMatrix_Reference#Matrix' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > .
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### Constants
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< table style = 'border-collapse: collapse; width: 62.5em' >
< tr >< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Const</ th >
< th style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > Value</ th >
< th style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' > Description</ th ></ tr >
< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kFill_ScaleToFit' >< code > SkMatrix::kFill_ScaleToFit</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 0</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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Computes < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = 'SkMatrix_Reference#Matrix' > scales< / a > < a href = 'SkMatrix_Reference#Matrix' > about< / a > < a href = 'SkMatrix_Reference#Matrix' > x-axis< / a > < a href = 'SkMatrix_Reference#Matrix' > and< / a > < a href = 'SkMatrix_Reference#Matrix' > y-axis< / a > < a href = 'SkMatrix_Reference#Matrix' > independently< / a > , < a href = 'SkMatrix_Reference#Matrix' > so< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a >
< a href = 'SkMatrix_Reference#Matrix' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > is< / a > < a href = 'SkRect_Reference#Rect' > mapped< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > completely< / a > < a href = 'SkRect_Reference#Rect' > fill< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > . < a href = 'SkRect_Reference#Rect' > The< / a > < a href = 'SkRect_Reference#Rect' > aspect< / a > < a href = 'SkRect_Reference#Rect' > ratio< / a >
< a href = 'SkRect_Reference#Rect' > of< / a > < a href = 'SkRect_Reference#Rect' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > may< / a > < a href = 'SkRect_Reference#Rect' > change< / a > .
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< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kStart_ScaleToFit' >< code > SkMatrix::kStart_ScaleToFit</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 1</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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Computes < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = 'SkMatrix_Reference#Matrix' > maintains< / a > < a href = 'SkMatrix_Reference#Matrix' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > aspect< / a > < a href = 'SkRect_Reference#Rect' > ratio< / a > , < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a >
< a href = 'SkRect_Reference#Rect' > width< / a > < a href = 'SkRect_Reference#Rect' > or< / a > < a href = 'SkRect_Reference#Rect' > height< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > . < a href = 'SkRect_Reference#Rect' > Aligns< / a > < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > left< / a > < a href = 'SkRect_Reference#Rect' > and< / a > < a href = 'SkRect_Reference#Rect' > top< / a > < a href = 'SkRect_Reference#Rect' > edges< / a >
< a href = 'SkRect_Reference#Rect' > of< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > .
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< / td >
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< / tr >
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< tr style = 'background-color: #f0f0f0 ; ' >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kCenter_ScaleToFit' >< code > SkMatrix::kCenter_ScaleToFit</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 2</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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Computes < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = 'SkMatrix_Reference#Matrix' > maintains< / a > < a href = 'SkMatrix_Reference#Matrix' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > aspect< / a > < a href = 'SkRect_Reference#Rect' > ratio< / a > , < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a >
< a href = 'SkRect_Reference#Rect' > width< / a > < a href = 'SkRect_Reference#Rect' > or< / a > < a href = 'SkRect_Reference#Rect' > height< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > . < a href = 'SkRect_Reference#Rect' > Aligns< / a > < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > center< / a > < a href = 'SkRect_Reference#Rect' > of< / a > < a href = 'SkRect_Reference#Rect' > destination< / a >
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< a href = 'SkRect_Reference#Rect' > Rect< / a > .
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< / td >
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< / tr >
< tr >
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< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >< a name = 'SkMatrix_kEnd_ScaleToFit' >< code > SkMatrix::kEnd_ScaleToFit</ code ></ a ></ td >
< td style = 'text-align: center; border: 2px solid #dddddd ; padding: 8px; ' > 3</ td >
< td style = 'text-align: left; border: 2px solid #dddddd ; padding: 8px; ' >
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Computes < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = 'SkMatrix_Reference#Matrix' > maintains< / a > < a href = 'SkMatrix_Reference#Matrix' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > < a href = 'SkRect_Reference#Rect' > aspect< / a > < a href = 'SkRect_Reference#Rect' > ratio< / a > , < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > source< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a >
< a href = 'SkRect_Reference#Rect' > width< / a > < a href = 'SkRect_Reference#Rect' > or< / a > < a href = 'SkRect_Reference#Rect' > height< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > . < a href = 'SkRect_Reference#Rect' > Aligns< / a > < a href = 'SkRect_Reference#Rect' > mapping< / a > < a href = 'SkRect_Reference#Rect' > to< / a > < a href = 'SkRect_Reference#Rect' > right< / a > < a href = 'SkRect_Reference#Rect' > and< / a > < a href = 'SkRect_Reference#Rect' > bottom< / a >
< a href = 'SkRect_Reference#Rect' > edges< / a > < a href = 'SkRect_Reference#Rect' > of< / a > < a href = 'SkRect_Reference#Rect' > destination< / a > < a href = 'SkRect_Reference#Rect' > Rect< / a > .
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< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "17c3070b31b700ea8f52e48af9a66b6e" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setRectToRect' > setRectToRect< / a > < a href = '#SkMatrix_MakeRectToRect' > MakeRectToRect< / a > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a >
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< a name = 'SkMatrix_setRectToRect' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_setRectToRect' > setRectToRect< / a > (< a href = '#SkMatrix_setRectToRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > stf< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = '#SkMatrix_setRectToRect_src' > src< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = '#SkMatrix_setRectToRect_dst' > dst< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > . < a href = '#SkMatrix_setRectToRect_stf' > stf< / a > < a href = '#SkMatrix_setRectToRect_stf' > selects< / a > < a href = '#SkMatrix_setRectToRect_stf' > whether< / a >
mapping completely fills < a href = '#SkMatrix_setRectToRect_dst' > dst< / a > < a href = '#SkMatrix_setRectToRect_dst' > or< / a > < a href = '#SkMatrix_setRectToRect_dst' > preserves< / a > < a href = '#SkMatrix_setRectToRect_dst' > the< / a > < a href = '#SkMatrix_setRectToRect_dst' > aspect< / a > < a href = '#SkMatrix_setRectToRect_dst' > ratio< / a > , < a href = '#SkMatrix_setRectToRect_dst' > and< / a > < a href = '#SkMatrix_setRectToRect_dst' > how< / a > < a href = '#SkMatrix_setRectToRect_dst' > to< / a > < a href = '#SkMatrix_setRectToRect_dst' > align< / a >
< a href = '#SkMatrix_setRectToRect_src' > src< / a > < a href = '#SkMatrix_setRectToRect_src' > within< / a > < a href = '#SkMatrix_setRectToRect_dst' > dst< / a > . < a href = '#SkMatrix_setRectToRect_dst' > Returns< / a > < a href = '#SkMatrix_setRectToRect_dst' > false< / a > < a href = '#SkMatrix_setRectToRect_dst' > if< / a > < a href = '#SkMatrix_setRectToRect_src' > src< / a > < a href = '#SkMatrix_setRectToRect_src' > is< / a > < a href = '#SkMatrix_setRectToRect_src' > empty< / a > , < a href = '#SkMatrix_setRectToRect_src' > and< / a > < a href = '#SkMatrix_setRectToRect_src' > sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > .
Returns true if < a href = '#SkMatrix_setRectToRect_dst' > dst< / a > < a href = '#SkMatrix_setRectToRect_dst' > is< / a > < a href = '#SkMatrix_setRectToRect_dst' > empty< / a > , < a href = '#SkMatrix_setRectToRect_dst' > and< / a > < a href = '#SkMatrix_setRectToRect_dst' > sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 0 0 0 |
| 0 0 0 |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setRectToRect_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < a href = 'SkRect_Reference#SkRect' > from< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setRectToRect_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setRectToRect_stf' > < code > < strong > stf< / strong > < / code > < / a > < / td >
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< td > one of: < a href = '#SkMatrix_kFill_ScaleToFit' > kFill_ScaleToFit< / a > , < a href = '#SkMatrix_kStart_ScaleToFit' > kStart_ScaleToFit< / a > ,< / td >
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< / tr >
< / table >
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< a href = '#SkMatrix_kCenter_ScaleToFit' > kCenter_ScaleToFit< / a > , < a href = '#SkMatrix_kEnd_ScaleToFit' > kEnd_ScaleToFit< / a >
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### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > can< / a > < a href = 'SkMatrix_Reference#SkMatrix' > represent< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > mapping< / a >
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### Example
< div > < fiddle-embed name = "69cdea599dcaaec35efcb24403f4287b" >
#### Example Output
~~~~
src: 0, 0, 0, 0 dst: 0, 0, 0, 0 success: false
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 0, 0, 0, 0 dst: 5, 6, 8, 9 success: false
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 1, 2, 3, 4 dst: 0, 0, 0, 0 success: true
[ 0.0000 0.0000 0.0000][ 0.0000 0.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 1, 2, 3, 4 dst: 5, 6, 8, 9 success: true
[ 1.5000 0.0000 3.5000][ 0.0000 1.5000 3.0000][ 0.0000 0.0000 1.0000]
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_MakeRectToRect' > MakeRectToRect< / a > < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > ::< a href = '#SkRect_isEmpty' > isEmpty< / a >
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< a name = 'SkMatrix_MakeRectToRect' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_MakeRectToRect' > MakeRectToRect< / a > (< a href = '#SkMatrix_MakeRectToRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_ScaleToFit' > stf< / a > )
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< / pre >
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Returns < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > set< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = '#SkMatrix_MakeRectToRect_src' > src< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > dst< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > . < a href = '#SkMatrix_MakeRectToRect_stf' > stf< / a > < a href = '#SkMatrix_MakeRectToRect_stf' > selects< / a >
whether mapping completely fills < a href = '#SkMatrix_MakeRectToRect_dst' > dst< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > or< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > preserves< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > the< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > aspect< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > ratio< / a > , < a href = '#SkMatrix_MakeRectToRect_dst' > and< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > how< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > to< / a >
align < a href = '#SkMatrix_MakeRectToRect_src' > src< / a > < a href = '#SkMatrix_MakeRectToRect_src' > within< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > dst< / a > . < a href = '#SkMatrix_MakeRectToRect_dst' > Returns< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > the< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > identity< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > if< / a > < a href = '#SkMatrix_MakeRectToRect_src' > src< / a > < a href = '#SkMatrix_MakeRectToRect_src' > is< / a > < a href = '#SkMatrix_MakeRectToRect_src' > empty< / a > . < a href = '#SkMatrix_MakeRectToRect_src' > If< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > dst< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > is< / a >
empty, returns < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > set< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 0 0 0 |
| 0 0 0 |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_MakeRectToRect_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < a href = 'SkRect_Reference#SkRect' > from< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_MakeRectToRect_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_MakeRectToRect_stf' > < code > < strong > stf< / strong > < / code > < / a > < / td >
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< td > one of: < a href = '#SkMatrix_kFill_ScaleToFit' > kFill_ScaleToFit< / a > , < a href = '#SkMatrix_kStart_ScaleToFit' > kStart_ScaleToFit< / a > ,< / td >
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< / tr >
< / table >
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< a href = '#SkMatrix_kCenter_ScaleToFit' > kCenter_ScaleToFit< / a > , < a href = '#SkMatrix_kEnd_ScaleToFit' > kEnd_ScaleToFit< / a >
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### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > mapping< / a > < a href = '#SkMatrix_MakeRectToRect_src' > src< / a > < a href = '#SkMatrix_MakeRectToRect_src' > to< / a > < a href = '#SkMatrix_MakeRectToRect_dst' > dst< / a >
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### Example
< div > < fiddle-embed name = "a1d6a6721b39350f81021f71a1b93208" >
#### Example Output
~~~~
src: 0, 0, 0, 0 dst: 0, 0, 0, 0
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 0, 0, 0, 0 dst: 5, 6, 8, 9
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 1, 2, 3, 4 dst: 0, 0, 0, 0
[ 0.0000 0.0000 0.0000][ 0.0000 0.0000 0.0000][ 0.0000 0.0000 1.0000]
src: 1, 2, 3, 4 dst: 5, 6, 8, 9
[ 1.5000 0.0000 3.5000][ 0.0000 1.5000 3.0000][ 0.0000 0.0000 1.0000]
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setRectToRect' > setRectToRect< / a > < a href = '#SkMatrix_ScaleToFit' > ScaleToFit< / a > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > ::< a href = '#SkRect_isEmpty' > isEmpty< / a >
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< a name = 'SkMatrix_setPolyToPoly' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > (< a href = '#SkMatrix_setPolyToPoly' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > src< / a > [], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > )
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > map< / a > < a href = '#SkMatrix_setPolyToPoly_src' > src< / a > < a href = '#SkMatrix_setPolyToPoly_src' > to< / a > < a href = '#SkMatrix_setPolyToPoly_dst' > dst< / a > . < a href = '#SkMatrix_setPolyToPoly_count' > count< / a > < a href = '#SkMatrix_setPolyToPoly_count' > must< / a > < a href = '#SkMatrix_setPolyToPoly_count' > be< / a > < a href = '#SkMatrix_setPolyToPoly_count' > zero< / a > < a href = '#SkMatrix_setPolyToPoly_count' > or< / a > < a href = '#SkMatrix_setPolyToPoly_count' > greater< / a > , < a href = '#SkMatrix_setPolyToPoly_count' > and< / a > < a href = '#SkMatrix_setPolyToPoly_count' > four< / a > < a href = '#SkMatrix_setPolyToPoly_count' > or< / a > < a href = '#SkMatrix_setPolyToPoly_count' > less< / a > .
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If < a href = '#SkMatrix_setPolyToPoly_count' > count< / a > < a href = '#SkMatrix_setPolyToPoly_count' > is< / a > < a href = '#SkMatrix_setPolyToPoly_count' > zero< / a > , < a href = '#SkMatrix_setPolyToPoly_count' > sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identity< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > returns< / a > < a href = 'SkMatrix_Reference#SkMatrix' > true< / a > .
If < a href = '#SkMatrix_setPolyToPoly_count' > count< / a > < a href = '#SkMatrix_setPolyToPoly_count' > is< / a > < a href = '#SkMatrix_setPolyToPoly_count' > one< / a > , < a href = '#SkMatrix_setPolyToPoly_count' > sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > returns< / a > < a href = 'SkMatrix_Reference#SkMatrix' > true< / a > .
If < a href = '#SkMatrix_setPolyToPoly_count' > count< / a > < a href = '#SkMatrix_setPolyToPoly_count' > is< / a > < a href = '#SkMatrix_setPolyToPoly_count' > two< / a > < a href = '#SkMatrix_setPolyToPoly_count' > or< / a > < a href = '#SkMatrix_setPolyToPoly_count' > more< / a > , < a href = '#SkMatrix_setPolyToPoly_count' > sets< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > map< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > if< / a > < a href = 'SkPoint_Reference#SkPoint' > possible< / a > ; < a href = 'SkPoint_Reference#SkPoint' > returns< / a > < a href = 'SkPoint_Reference#SkPoint' > false< / a >
if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > cannot< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > If< / a > < a href = '#SkMatrix_setPolyToPoly_count' > count< / a > < a href = '#SkMatrix_setPolyToPoly_count' > is< / a > < a href = '#SkMatrix_setPolyToPoly_count' > four< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > may< / a > < a href = 'SkMatrix_Reference#SkMatrix' > include< / a >
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perspective.
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setPolyToPoly_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < a href = 'SkPoint_Reference#SkPoint' > from< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setPolyToPoly_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_setPolyToPoly_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > number of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > in< / a > < a href = '#SkMatrix_setPolyToPoly_src' > src< / a > < a href = '#SkMatrix_setPolyToPoly_src' > and< / a > < a href = '#SkMatrix_setPolyToPoly_dst' > dst< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > was< / a > < a href = 'SkMatrix_Reference#SkMatrix' > constructed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > successfully< / a >
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### Example
< div > < fiddle-embed name = "c851d1313e8909aaea4f0591699fdb7b" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setRectToRect' > setRectToRect< / a > < a href = '#SkMatrix_MakeRectToRect' > MakeRectToRect< / a >
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< a name = 'SkMatrix_invert' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_invert' > invert< / a > (< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > * < a href = 'SkMatrix_Reference#SkMatrix' > inverse< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a >
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< / pre >
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Sets < a href = '#SkMatrix_invert_inverse' > inverse< / a > < a href = '#SkMatrix_invert_inverse' > to< / a > < a href = '#SkMatrix_invert_inverse' > reciprocal< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > , < a href = 'SkMatrix_Reference#Matrix' > returning< / a > < a href = 'SkMatrix_Reference#Matrix' > true< / a > < a href = 'SkMatrix_Reference#Matrix' > if< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > can< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > inverted< / a > .
Geometrically, if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > maps< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > source< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > destination< / a > , < a href = '#SkMatrix_invert_inverse' > inverse< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
maps from destination to source. If < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > can< / a > < a href = 'SkMatrix_Reference#SkMatrix' > not< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > inverted< / a > , < a href = '#SkMatrix_invert_inverse' > inverse< / a > < a href = '#SkMatrix_invert_inverse' > is< / a >
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unchanged.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_invert_inverse' > < code > < strong > inverse< / strong > < / code > < / a > < / td >
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< td > storage for inverted < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > ; < a href = 'SkMatrix_Reference#SkMatrix' > may< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > nullptr< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > can< / a > < a href = 'SkMatrix_Reference#SkMatrix' > be< / a > < a href = 'SkMatrix_Reference#SkMatrix' > inverted< / a >
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### Example
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< div > < fiddle-embed name = "0e03cd9f154603ed4b21ca56d69dae44" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_Concat' > Concat< / a >
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< a name = 'SkMatrix_SetAffineIdentity' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static void < a href = '#SkMatrix_SetAffineIdentity' > SetAffineIdentity< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6])
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< / pre >
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Fills < a href = '#SkMatrix_SetAffineIdentity_affine' > affine< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > with< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > identity< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > values< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > in< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > column< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > major< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > order< / a > .
Sets < a href = '#SkMatrix_SetAffineIdentity_affine' > affine< / a > < a href = '#SkMatrix_SetAffineIdentity_affine' > to< / a > :
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| 1 0 0 |
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| 0 1 0 |
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Affine 3 by 2 < a href = 'SkMatrix_Reference#Matrix' > matrices< / a > < a href = 'SkMatrix_Reference#Matrix' > in< / a > < a href = 'SkMatrix_Reference#Matrix' > column< / a > < a href = 'SkMatrix_Reference#Matrix' > major< / a > < a href = 'SkMatrix_Reference#Matrix' > order< / a > < a href = 'SkMatrix_Reference#Matrix' > are< / a > < a href = 'SkMatrix_Reference#Matrix' > used< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a > < a href = 'SkMatrix_Reference#Matrix' > OpenGL< / a > < a href = 'SkMatrix_Reference#Matrix' > and< / a > < a href = 'SkMatrix_Reference#Matrix' > XPS< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_SetAffineIdentity_affine' > < code > < strong > affine< / strong > < / code > < / a > < / td >
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< td > storage for 3 by 2 < a href = '#SkMatrix_SetAffineIdentity_affine' > affine< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "e10adbd0bcc940c5d4d872db0e78e892" >
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#### Example Output
~~~~
ScaleX: 1 SkewY: 0 SkewX: 0 ScaleY: 1 TransX: 0 TransY: 0
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setAffine' > setAffine< / a > < a href = '#SkMatrix_asAffine' > asAffine< / a >
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< a name = 'SkMatrix_asAffine' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_asAffine' > asAffine< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6]) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Fills < a href = '#SkMatrix_asAffine_affine' > affine< / a > < a href = '#SkMatrix_asAffine_affine' > in< / a > < a href = '#SkMatrix_asAffine_affine' > column< / a > < a href = '#SkMatrix_asAffine_affine' > major< / a > < a href = '#SkMatrix_asAffine_affine' > order< / a > . < a href = '#SkMatrix_asAffine_affine' > Sets< / a > < a href = '#SkMatrix_asAffine_affine' > affine< / a > < a href = '#SkMatrix_asAffine_affine' > to< / a > :
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| scale-x skew-x translate-x |
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| skew-y scale-y translate-y |
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If < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > returns< / a > < a href = 'SkMatrix_Reference#SkMatrix' > false< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > leaves< / a > < a href = '#SkMatrix_asAffine_affine' > affine< / a > < a href = '#SkMatrix_asAffine_affine' > unchanged< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_asAffine_affine' > < code > < strong > affine< / strong > < / code > < / a > < / td >
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< td > storage for 3 by 2 < a href = '#SkMatrix_asAffine_affine' > affine< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > ; < a href = 'SkMatrix_Reference#Matrix' > may< / a > < a href = 'SkMatrix_Reference#Matrix' > be< / a > < a href = 'SkMatrix_Reference#Matrix' > nullptr< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > does< / a > < a href = 'SkMatrix_Reference#SkMatrix' > not< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contain< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a >
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### Example
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< div > < fiddle-embed name = "3325bdf82bd86d9fbc4199f248afa82c" >
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#### Example Output
~~~~
ScaleX: 2 SkewY: 5 SkewX: 3 ScaleY: 6 TransX: 4 TransY: 7
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setAffine' > setAffine< / a > < a href = '#SkMatrix_SetAffineIdentity' > SetAffineIdentity< / a >
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< a name = 'SkMatrix_setAffine' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setAffine' > setAffine< / a > (< a href = '#SkMatrix_setAffine' > const< / a > < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > affine< / a > [6])
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< / pre >
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Sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = '#SkMatrix_setAffine_affine' > affine< / a > < a href = '#SkMatrix_setAffine_affine' > values< / a > , < a href = '#SkMatrix_setAffine_affine' > passed< / a > < a href = '#SkMatrix_setAffine_affine' > in< / a > < a href = '#SkMatrix_setAffine_affine' > column< / a > < a href = '#SkMatrix_setAffine_affine' > major< / a > < a href = '#SkMatrix_setAffine_affine' > order< / a > . < a href = '#SkMatrix_setAffine_affine' > Given< / a > < a href = '#SkMatrix_setAffine_affine' > affine< / a > ,
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column, then row, as:
| scale-x skew-x translate-x |
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| skew-y scale-y translate-y |
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > set< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > row< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > then< / a > < a href = 'SkMatrix_Reference#SkMatrix' > column< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| scale-x skew-x translate-x |
| skew-y scale-y translate-y |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setAffine_affine' > < code > < strong > affine< / strong > < / code > < / a > < / td >
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< td > 3 by 2 < a href = '#SkMatrix_setAffine_affine' > affine< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "f5b6d371c4d65e5b5ac6eebdd4b237d8" >
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#### Example Output
~~~~
ScaleX: 2 SkewY: 5 SkewX: 3 ScaleY: 6 TransX: 4 TransY: 7
[ 2.0000 3.0000 4.0000][ 5.0000 6.0000 7.0000][ 0.0000 0.0000 1.0000]
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_asAffine' > asAffine< / a > < a href = '#SkMatrix_SetAffineIdentity' > SetAffineIdentity< / a >
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< a name = 'Transform' > < / a >
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< a name = 'SkMatrix_mapPoints' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > src< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a >
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< / pre >
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Maps < a href = '#SkMatrix_mapPoints_src' > src< / a > < a href = 'SkPath_Reference#Point_Array' > SkPoint array< / a > < a href = 'SkPoint_Reference#SkPoint' > of< / a > < a href = 'SkPoint_Reference#SkPoint' > length< / a > < a href = '#SkMatrix_mapPoints_count' > count< / a > < a href = '#SkMatrix_mapPoints_count' > to< / a > < a href = '#SkMatrix_mapPoints_dst' > dst< / a > < a href = 'SkPath_Reference#Point_Array' > SkPoint array< / a > < a href = 'SkPoint_Reference#SkPoint' > of< / a > < a href = 'SkPoint_Reference#SkPoint' > equal< / a > < a href = 'SkPoint_Reference#SkPoint' > or< / a > < a href = 'SkPoint_Reference#SkPoint' > greater< / a >
length. < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > are< / a > < a href = 'SkPoint_Reference#SkPoint' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkPoint_Reference#SkPoint' > multiplying< / a > < a href = 'SkPoint_Reference#SkPoint' > each< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B C | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = | < a href = 'SkMatrix_Reference#Matrix' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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where
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for (i = 0; i < < a href = '#SkMatrix_mapPoints_count' > count< / a > ; ++< a href = '#SkMatrix_mapPoints_count' > i< / a > ) {
x = < a href = '#SkMatrix_mapPoints_src' > src< / a > [< a href = '#SkMatrix_mapPoints_src' > i< / a > ].< a href = '#SkMatrix_mapPoints_src' > fX< / a >
y = < a href = '#SkMatrix_mapPoints_src' > src< / a > [< a href = '#SkMatrix_mapPoints_src' > i< / a > ].< a href = '#SkMatrix_mapPoints_src' > fY< / a >
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}
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each < a href = '#SkMatrix_mapPoints_dst' > dst< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > is< / a > < a href = 'SkPoint_Reference#SkPoint' > computed< / a > < a href = 'SkPoint_Reference#SkPoint' > as< / a > :
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|A B C| |x| Ax+By+C Dx+Ey+F
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > | |< a href = 'SkMatrix_Reference#Matrix' > y< / a > | = |< a href = 'SkMatrix_Reference#Matrix' > Ax< / a > +< a href = 'SkMatrix_Reference#Matrix' > By< / a > +< a href = 'SkMatrix_Reference#Matrix' > C< / a > < a href = 'SkMatrix_Reference#Matrix' > Dx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Ey< / a > +< a href = 'SkMatrix_Reference#Matrix' > F< / a > < a href = 'SkMatrix_Reference#Matrix' > Gx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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< a href = '#SkMatrix_mapPoints_src' > src< / a > < a href = '#SkMatrix_mapPoints_src' > and< / a > < a href = '#SkMatrix_mapPoints_dst' > dst< / a > < a href = '#SkMatrix_mapPoints_dst' > may< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > to< / a > < a href = 'SkPoint_Reference#Point' > the< / a > < a href = 'SkPoint_Reference#Point' > same< / a > < a href = 'SkPoint_Reference#Point' > storage< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapPoints_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapPoints_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > transform< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapPoints_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > number of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > transform< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "f99dcb00296d0c56b6c0e178e94b3534" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapXY' > mapXY< / a > < a href = '#SkMatrix_mapHomogeneousPoints' > mapHomogeneousPoints< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a >
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< a name = 'SkMatrix_mapPoints_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapPoints' > mapPoints< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > pts< / a > [], < a href = 'SkPoint_Reference#SkPoint' > int< / a > < a href = 'SkPoint_Reference#SkPoint' > count< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a >
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< / pre >
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Maps < a href = '#SkMatrix_mapPoints_2_pts' > pts< / a > < a href = 'SkPath_Reference#Point_Array' > SkPoint array< / a > < a href = 'SkPoint_Reference#SkPoint' > of< / a > < a href = 'SkPoint_Reference#SkPoint' > length< / a > < a href = '#SkMatrix_mapPoints_2_count' > count< / a > < a href = '#SkMatrix_mapPoints_2_count' > in< / a > < a href = '#SkMatrix_mapPoints_2_count' > place< / a > . < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > are< / a > < a href = 'SkPoint_Reference#SkPoint' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkPoint_Reference#SkPoint' > multiplying< / a >
each < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B C | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = | < a href = 'SkMatrix_Reference#Matrix' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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where
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for (i = 0; i < < a href = '#SkMatrix_mapPoints_2_count' > count< / a > ; ++< a href = '#SkMatrix_mapPoints_2_count' > i< / a > ) {
x = < a href = '#SkMatrix_mapPoints_2_pts' > pts< / a > [< a href = '#SkMatrix_mapPoints_2_pts' > i< / a > ].< a href = '#SkMatrix_mapPoints_2_pts' > fX< / a >
y = < a href = '#SkMatrix_mapPoints_2_pts' > pts< / a > [< a href = '#SkMatrix_mapPoints_2_pts' > i< / a > ].< a href = '#SkMatrix_mapPoints_2_pts' > fY< / a >
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}
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each resulting < a href = '#SkMatrix_mapPoints_2_pts' > pts< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > is< / a > < a href = 'SkPoint_Reference#SkPoint' > computed< / a > < a href = 'SkPoint_Reference#SkPoint' > as< / a > :
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|A B C| |x| Ax+By+C Dx+Ey+F
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > | |< a href = 'SkMatrix_Reference#Matrix' > y< / a > | = |< a href = 'SkMatrix_Reference#Matrix' > Ax< / a > +< a href = 'SkMatrix_Reference#Matrix' > By< / a > +< a href = 'SkMatrix_Reference#Matrix' > C< / a > < a href = 'SkMatrix_Reference#Matrix' > Dx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Ey< / a > +< a href = 'SkMatrix_Reference#Matrix' > F< / a > < a href = 'SkMatrix_Reference#Matrix' > Gx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapPoints_2_pts' > < code > < strong > pts< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapPoints_2_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > number of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > transform< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "428ca171ae3bd0d3f992458ac598b97b" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapXY' > mapXY< / a > < a href = '#SkMatrix_mapHomogeneousPoints' > mapHomogeneousPoints< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a >
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< a name = 'SkMatrix_mapHomogeneousPoints' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapHomogeneousPoints' > mapHomogeneousPoints< / a > (< a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > dst< / a > [], < a href = 'undocumented#SkPoint3' > const< / a > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > src< / a > [], < a href = 'undocumented#SkPoint3' > int< / a > < a href = 'undocumented#SkPoint3' > count< / a > ) < a href = 'undocumented#SkPoint3' > const< / a >
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< / pre >
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Maps < a href = '#SkMatrix_mapHomogeneousPoints_src' > src< / a > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > < a href = 'undocumented#SkPoint3' > of< / a > < a href = 'undocumented#SkPoint3' > length< / a > < a href = '#SkMatrix_mapHomogeneousPoints_count' > count< / a > < a href = '#SkMatrix_mapHomogeneousPoints_count' > to< / a > < a href = '#SkMatrix_mapHomogeneousPoints_dst' > dst< / a > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > , < a href = 'undocumented#SkPoint3' > which< / a > < a href = 'undocumented#SkPoint3' > must< / a > < a href = 'undocumented#SkPoint3' > of< / a > < a href = 'undocumented#SkPoint3' > length< / a > < a href = '#SkMatrix_mapHomogeneousPoints_count' > count< / a > < a href = '#SkMatrix_mapHomogeneousPoints_count' > or< / a >
greater. < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > < a href = 'undocumented#SkPoint3' > is< / a > < a href = 'undocumented#SkPoint3' > mapped< / a > < a href = 'undocumented#SkPoint3' > by< / a > < a href = 'undocumented#SkPoint3' > multiplying< / a > < a href = 'undocumented#SkPoint3' > each< / a > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B C | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = '#SkMatrix_mapHomogeneousPoints_src' > src< / a > = | < a href = '#SkMatrix_mapHomogeneousPoints_src' > y< / a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > z< / a > |
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each resulting < a href = '#SkMatrix_mapHomogeneousPoints_dst' > dst< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > is< / a > < a href = 'SkPoint_Reference#SkPoint' > computed< / a > < a href = 'SkPoint_Reference#SkPoint' > as< / a > :
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|A B C| |x|
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = '#SkMatrix_mapHomogeneousPoints_src' > src< / a > = |< a href = '#SkMatrix_mapHomogeneousPoints_src' > D< / a > < a href = '#SkMatrix_mapHomogeneousPoints_src' > E< / a > < a href = '#SkMatrix_mapHomogeneousPoints_src' > F< / a > | |< a href = '#SkMatrix_mapHomogeneousPoints_src' > y< / a > | = |< a href = '#SkMatrix_mapHomogeneousPoints_src' > Ax< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > By< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > Cz< / a > < a href = '#SkMatrix_mapHomogeneousPoints_src' > Dx< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > Ey< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > Fz< / a > < a href = '#SkMatrix_mapHomogeneousPoints_src' > Gx< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > Hy< / a > +< a href = '#SkMatrix_mapHomogeneousPoints_src' > Iz< / a > |
|G H < a href = '#SkMatrix_I' > I< / a > | |< a href = '#SkMatrix_I' > z< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapHomogeneousPoints_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapHomogeneousPoints_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > < a href = 'undocumented#SkPoint3' > to< / a > < a href = 'undocumented#SkPoint3' > transform< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapHomogeneousPoints_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > items in < a href = 'undocumented#SkPoint3' > SkPoint3< / a > < a href = 'undocumented#SkPoint3' > array< / a > < a href = 'undocumented#SkPoint3' > to< / a > < a href = 'undocumented#SkPoint3' > transform< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "d56f93e4bc763c7ba4914321ed07a8b5" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a >
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2018-05-16 11:07:07 +00:00
< a name = 'SkMatrix_mapXY' > < / a >
2018-10-16 14:30:28 +00:00
---
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2018-05-16 11:07:07 +00:00
< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapXY' > mapXY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > x< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > , < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > * < a href = 'SkPoint_Reference#SkPoint' > result< / a > ) < a href = 'SkPoint_Reference#SkPoint' > const< / a >
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< / pre >
2018-11-07 19:59:03 +00:00
Maps < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > (< a href = '#SkMatrix_mapXY_x' > x< / a > , < a href = '#SkMatrix_mapXY_y' > y< / a > ) < a href = '#SkMatrix_mapXY_y' > to< / a > < a href = '#SkMatrix_mapXY_result' > result< / a > . < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > is< / a > < a href = 'SkPoint_Reference#SkPoint' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkPoint_Reference#SkPoint' > multiplying< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B C | | < a href = '#SkMatrix_mapXY_x' > x< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = | < a href = '#SkMatrix_mapXY_y' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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< a href = '#SkMatrix_mapXY_result' > result< / a > < a href = '#SkMatrix_mapXY_result' > is< / a > < a href = '#SkMatrix_mapXY_result' > computed< / a > < a href = '#SkMatrix_mapXY_result' > as< / a > :
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|A B C| |< a href = '#SkMatrix_mapXY_x' > x< / a > | < a href = '#SkMatrix_mapXY_x' > Ax< / a > +< a href = '#SkMatrix_mapXY_x' > By< / a > +< a href = '#SkMatrix_mapXY_x' > C< / a > < a href = '#SkMatrix_mapXY_x' > Dx< / a > +< a href = '#SkMatrix_mapXY_x' > Ey< / a > +< a href = '#SkMatrix_mapXY_x' > F< / a >
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > | |< a href = '#SkMatrix_mapXY_y' > y< / a > | = |< a href = '#SkMatrix_mapXY_y' > Ax< / a > +< a href = '#SkMatrix_mapXY_y' > By< / a > +< a href = '#SkMatrix_mapXY_y' > C< / a > < a href = '#SkMatrix_mapXY_y' > Dx< / a > +< a href = '#SkMatrix_mapXY_y' > Ey< / a > +< a href = '#SkMatrix_mapXY_y' > F< / a > < a href = '#SkMatrix_mapXY_y' > Gx< / a > +< a href = '#SkMatrix_mapXY_y' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapXY_x' > < code > < strong > x< / strong > < / code > < / a > < / td >
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< td > x-axis value of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapXY_y' > < code > < strong > y< / strong > < / code > < / a > < / td >
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< td > y-axis value of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapXY_result' > < code > < strong > result< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "9e50185d502dc6903783679a84106089" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a >
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< a name = 'SkMatrix_mapXY_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > x< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Returns < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > (< a href = '#SkMatrix_mapXY_2_x' > x< / a > , < a href = '#SkMatrix_mapXY_2_y' > y< / a > ) < a href = '#SkMatrix_mapXY_2_y' > multiplied< / a > < a href = '#SkMatrix_mapXY_2_y' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B C | | < a href = '#SkMatrix_mapXY_2_x' > x< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = | < a href = '#SkMatrix_mapXY_2_y' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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result is computed as:
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|A B C| |< a href = '#SkMatrix_mapXY_2_x' > x< / a > | < a href = '#SkMatrix_mapXY_2_x' > Ax< / a > +< a href = '#SkMatrix_mapXY_2_x' > By< / a > +< a href = '#SkMatrix_mapXY_2_x' > C< / a > < a href = '#SkMatrix_mapXY_2_x' > Dx< / a > +< a href = '#SkMatrix_mapXY_2_x' > Ey< / a > +< a href = '#SkMatrix_mapXY_2_x' > F< / a >
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > | |< a href = '#SkMatrix_mapXY_2_y' > y< / a > | = |< a href = '#SkMatrix_mapXY_2_y' > Ax< / a > +< a href = '#SkMatrix_mapXY_2_y' > By< / a > +< a href = '#SkMatrix_mapXY_2_y' > C< / a > < a href = '#SkMatrix_mapXY_2_y' > Dx< / a > +< a href = '#SkMatrix_mapXY_2_y' > Ey< / a > +< a href = '#SkMatrix_mapXY_2_y' > F< / a > < a href = '#SkMatrix_mapXY_2_y' > Gx< / a > +< a href = '#SkMatrix_mapXY_2_y' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapXY_2_x' > < code > < strong > x< / strong > < / code > < / a > < / td >
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< td > x-axis value of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapXY_2_y' > < code > < strong > y< / strong > < / code > < / a > < / td >
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< td > y-axis value of < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > to< / a > < a href = 'SkPoint_Reference#SkPoint' > map< / a > < / td >
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< / tr >
< / table >
### Return Value
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mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a >
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### Example
< div > < fiddle-embed name = "b1ead09c67a177ab8eace12b061610a7" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapVectors' > mapVectors< / a >
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< a name = 'SkMatrix_mapVectors' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapVectors' > mapVectors< / a > (< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > dst< / a > [], < a href = 'SkPoint_Reference#SkVector' > const< / a > < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > src< / a > [], < a href = 'SkPoint_Reference#SkVector' > int< / a > < a href = 'SkPoint_Reference#SkVector' > count< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a >
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< / pre >
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Maps < a href = '#SkMatrix_mapVectors_src' > src< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > array< / a > < a href = 'SkPoint_Reference#Vector' > of< / a > < a href = 'SkPoint_Reference#Vector' > length< / a > < a href = '#SkMatrix_mapVectors_count' > count< / a > < a href = '#SkMatrix_mapVectors_count' > to< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPath_Reference#Point_Array' > SkPoint array< / a > < a href = 'SkPoint_Reference#SkPoint' > of< / a > < a href = 'SkPoint_Reference#SkPoint' > equal< / a > < a href = 'SkPoint_Reference#SkPoint' > or< / a > < a href = 'SkPoint_Reference#SkPoint' > greater< / a >
length. < a href = 'SkPoint_Reference#Vector' > Vectors< / a > < a href = 'SkPoint_Reference#Vector' > are< / a > < a href = 'SkPoint_Reference#Vector' > mapped< / a > < a href = 'SkPoint_Reference#Vector' > by< / a > < a href = 'SkPoint_Reference#Vector' > multiplying< / a > < a href = 'SkPoint_Reference#Vector' > each< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > treating< / a >
< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > < a href = 'SkMatrix_Reference#SkMatrix' > as< / a > < a href = 'SkMatrix_Reference#SkMatrix' > zero< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B 0 | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > 0 |, < a href = '#SkMatrix_mapVectors_src' > src< / a > = | < a href = '#SkMatrix_mapVectors_src' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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where
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for (i = 0; i < < a href = '#SkMatrix_mapVectors_count' > count< / a > ; ++< a href = '#SkMatrix_mapVectors_count' > i< / a > ) {
x = < a href = '#SkMatrix_mapVectors_src' > src< / a > [< a href = '#SkMatrix_mapVectors_src' > i< / a > ].< a href = '#SkMatrix_mapVectors_src' > fX< / a >
y = < a href = '#SkMatrix_mapVectors_src' > src< / a > [< a href = '#SkMatrix_mapVectors_src' > i< / a > ].< a href = '#SkMatrix_mapVectors_src' > fY< / a >
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}
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each < a href = '#SkMatrix_mapVectors_dst' > dst< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > is< / a > < a href = 'SkPoint_Reference#Vector' > computed< / a > < a href = 'SkPoint_Reference#Vector' > as< / a > :
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|A B 0| |x| Ax+By Dx+Ey
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = '#SkMatrix_mapVectors_src' > src< / a > = |< a href = '#SkMatrix_mapVectors_src' > D< / a > < a href = '#SkMatrix_mapVectors_src' > E< / a > 0| |< a href = '#SkMatrix_mapVectors_src' > y< / a > | = |< a href = '#SkMatrix_mapVectors_src' > Ax< / a > +< a href = '#SkMatrix_mapVectors_src' > By< / a > < a href = '#SkMatrix_mapVectors_src' > Dx< / a > +< a href = '#SkMatrix_mapVectors_src' > Ey< / a > < a href = '#SkMatrix_mapVectors_src' > Gx< / a > +< a href = '#SkMatrix_mapVectors_src' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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< a href = '#SkMatrix_mapVectors_src' > src< / a > < a href = '#SkMatrix_mapVectors_src' > and< / a > < a href = '#SkMatrix_mapVectors_dst' > dst< / a > < a href = '#SkMatrix_mapVectors_dst' > may< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > to< / a > < a href = 'SkPoint_Reference#Point' > the< / a > < a href = 'SkPoint_Reference#Point' > same< / a > < a href = 'SkPoint_Reference#Point' > storage< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapVectors_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'SkPoint_Reference#Vector' > vectors< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVectors_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#Vector' > vectors< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > transform< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVectors_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > number of < a href = 'SkPoint_Reference#Vector' > vectors< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > transform< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "918a9778c3d7d5cb306692784399f6dc" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapVector' > mapVector< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a >
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< a name = 'SkMatrix_mapVectors_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapVectors' > mapVectors< / a > (< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = 'SkPoint_Reference#SkVector' > vecs< / a > [], < a href = 'SkPoint_Reference#SkVector' > int< / a > < a href = 'SkPoint_Reference#SkVector' > count< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a >
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< / pre >
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Maps < a href = '#SkMatrix_mapVectors_2_vecs' > vecs< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > array< / a > < a href = 'SkPoint_Reference#Vector' > of< / a > < a href = 'SkPoint_Reference#Vector' > length< / a > < a href = '#SkMatrix_mapVectors_2_count' > count< / a > < a href = '#SkMatrix_mapVectors_2_count' > in< / a > < a href = '#SkMatrix_mapVectors_2_count' > place< / a > , < a href = '#SkMatrix_mapVectors_2_count' > multiplying< / a > < a href = '#SkMatrix_mapVectors_2_count' > each< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > by< / a >
< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > treating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > < a href = 'SkMatrix_Reference#SkMatrix' > as< / a > < a href = 'SkMatrix_Reference#SkMatrix' > zero< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B 0 | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > 0 |, < a href = 'SkMatrix_Reference#Matrix' > vec< / a > = | < a href = 'SkMatrix_Reference#Matrix' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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where
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for (i = 0; i < < a href = '#SkMatrix_mapVectors_2_count' > count< / a > ; ++< a href = '#SkMatrix_mapVectors_2_count' > i< / a > ) {
x = < a href = '#SkMatrix_mapVectors_2_vecs' > vecs< / a > [< a href = '#SkMatrix_mapVectors_2_vecs' > i< / a > ].< a href = '#SkMatrix_mapVectors_2_vecs' > fX< / a >
y = < a href = '#SkMatrix_mapVectors_2_vecs' > vecs< / a > [< a href = '#SkMatrix_mapVectors_2_vecs' > i< / a > ].< a href = '#SkMatrix_mapVectors_2_vecs' > fY< / a >
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}
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each result < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > is< / a > < a href = 'SkPoint_Reference#Vector' > computed< / a > < a href = 'SkPoint_Reference#Vector' > as< / a > :
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|A B 0| |x| Ax+By Dx+Ey
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > vec< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > 0| |< a href = 'SkMatrix_Reference#Matrix' > y< / a > | = |< a href = 'SkMatrix_Reference#Matrix' > Ax< / a > +< a href = 'SkMatrix_Reference#Matrix' > By< / a > < a href = 'SkMatrix_Reference#Matrix' > Dx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Ey< / a > < a href = 'SkMatrix_Reference#Matrix' > Gx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapVectors_2_vecs' > < code > < strong > vecs< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkPoint_Reference#Vector' > vectors< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > transform< / a > , < a href = 'SkPoint_Reference#Vector' > and< / a > < a href = 'SkPoint_Reference#Vector' > storage< / a > < a href = 'SkPoint_Reference#Vector' > for< / a > < a href = 'SkPoint_Reference#Vector' > mapped< / a > < a href = 'SkPoint_Reference#Vector' > vectors< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVectors_2_count' > < code > < strong > count< / strong > < / code > < / a > < / td >
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< td > number of < a href = 'SkPoint_Reference#Vector' > vectors< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > transform< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "5754501a00a1323e76353fb53153e939" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapVector' > mapVector< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a >
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< a name = 'SkMatrix_mapVector' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapVector' > mapVector< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > , < a href = 'SkPoint_Reference#SkVector' > SkVector< / a > * < a href = 'SkPoint_Reference#SkVector' > result< / a > ) < a href = 'SkPoint_Reference#SkVector' > const< / a >
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< / pre >
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Maps < a href = 'SkPoint_Reference#Vector' > vector< / a > (< a href = '#SkMatrix_mapVector_dx' > dx< / a > , < a href = '#SkMatrix_mapVector_dy' > dy< / a > ) < a href = '#SkMatrix_mapVector_dy' > to< / a > < a href = '#SkMatrix_mapVector_result' > result< / a > . < a href = 'SkPoint_Reference#Vector' > Vector< / a > < a href = 'SkPoint_Reference#Vector' > is< / a > < a href = 'SkPoint_Reference#Vector' > mapped< / a > < a href = 'SkPoint_Reference#Vector' > by< / a > < a href = 'SkPoint_Reference#Vector' > multiplying< / a > < a href = 'SkPoint_Reference#Vector' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > ,
treating < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > < a href = 'SkMatrix_Reference#SkMatrix' > as< / a > < a href = 'SkMatrix_Reference#SkMatrix' > zero< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Given< / a > :
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| A B 0 | | < a href = '#SkMatrix_mapVector_dx' > dx< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > 0 |, < a href = 'SkMatrix_Reference#Matrix' > vec< / a > = | < a href = '#SkMatrix_mapVector_dy' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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each < a href = '#SkMatrix_mapVector_result' > result< / a > < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > is< / a > < a href = 'SkPoint_Reference#Vector' > computed< / a > < a href = 'SkPoint_Reference#Vector' > as< / a > :
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|A B 0| |< a href = '#SkMatrix_mapVector_dx' > dx< / a > | < a href = '#SkMatrix_mapVector_dx' > A< / a > *< a href = '#SkMatrix_mapVector_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_dx' > B< / a > *< a href = '#SkMatrix_mapVector_dy' > dy< / a > < a href = '#SkMatrix_mapVector_dy' > D< / a > *< a href = '#SkMatrix_mapVector_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_dx' > E< / a > *< a href = '#SkMatrix_mapVector_dy' > dy< / a >
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>vec</a> = |<a href='SkMatrix_Reference#Matrix'>D</a> <a href='SkMatrix_Reference#Matrix'>E</a> 0| |<a href='#SkMatrix_mapVector_dy'>dy</a>| = |<a href='#SkMatrix_mapVector_dy'>A</a>* < a href = '#SkMatrix_mapVector_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_dx' > B</ a > *< a href = '#SkMatrix_mapVector_dy' > dy</ a > < a href = '#SkMatrix_mapVector_dy' > D</ a > *< a href = '#SkMatrix_mapVector_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_dx' > E</ a > *< a href = '#SkMatrix_mapVector_dy' > dy</ a > < a href = '#SkMatrix_mapVector_dy' > G</ a > *< a href = '#SkMatrix_mapVector_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_dx' > H</ a > *< a href = '#SkMatrix_mapVector_dy' > dy</ a > +< a href = '#SkMatrix_I' > I</ a > | = ----------- , -----------
|G H < a href = '#SkMatrix_I' > I< / a > | | 1| < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_mapVector_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_dx' > H< / a > *< a href = '#SkMatrix_mapVector_dy' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_mapVector_dx' > dx< / a > +*< a href = '#SkMatrix_mapVector_dx' > dHy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapVector_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
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< td > x-axis value of < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVector_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
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< td > y-axis value of < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVector_result' > < code > < strong > result< / strong > < / code > < / a > < / td >
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< td > storage for mapped < a href = 'SkPoint_Reference#Vector' > vector< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "aed143fc6cd0bce4ed029b98d1e61f2d" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapVectors' > mapVectors< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a >
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< a name = 'SkMatrix_mapVector_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = '#SkMatrix_mapVector' > mapVector< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > dy< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Returns < a href = 'SkPoint_Reference#Vector' > vector< / a > (< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > , < a href = '#SkMatrix_mapVector_2_dy' > dy< / a > ) < a href = '#SkMatrix_mapVector_2_dy' > multiplied< / a > < a href = '#SkMatrix_mapVector_2_dy' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > treating< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translation< / a > < a href = 'SkMatrix_Reference#SkMatrix' > as< / a > < a href = 'SkMatrix_Reference#SkMatrix' > zero< / a > .
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Given:
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| A B 0 | | < a href = '#SkMatrix_mapVector_2_dx' > dx< / a > |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > 0 |, < a href = 'SkMatrix_Reference#Matrix' > vec< / a > = | < a href = '#SkMatrix_mapVector_2_dy' > dy< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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each result < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > is< / a > < a href = 'SkPoint_Reference#Vector' > computed< / a > < a href = 'SkPoint_Reference#Vector' > as< / a > :
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|A B 0| |< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > | < a href = '#SkMatrix_mapVector_2_dx' > A< / a > *< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_2_dx' > B< / a > *< a href = '#SkMatrix_mapVector_2_dy' > dy< / a > < a href = '#SkMatrix_mapVector_2_dy' > D< / a > *< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_2_dx' > E< / a > *< a href = '#SkMatrix_mapVector_2_dy' > dy< / a >
< a href = 'SkMatrix_Reference#Matrix' > Matrix</ a > * <a href='SkMatrix_Reference#Matrix'>vec</a> = |<a href='SkMatrix_Reference#Matrix'>D</a> <a href='SkMatrix_Reference#Matrix'>E</a> 0| |<a href='#SkMatrix_mapVector_2_dy'>dy</a>| = |<a href='#SkMatrix_mapVector_2_dy'>A</a>* < a href = '#SkMatrix_mapVector_2_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_2_dx' > B</ a > *< a href = '#SkMatrix_mapVector_2_dy' > dy</ a > < a href = '#SkMatrix_mapVector_2_dy' > D</ a > *< a href = '#SkMatrix_mapVector_2_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_2_dx' > E</ a > *< a href = '#SkMatrix_mapVector_2_dy' > dy</ a > < a href = '#SkMatrix_mapVector_2_dy' > G</ a > *< a href = '#SkMatrix_mapVector_2_dx' > dx</ a > +< a href = '#SkMatrix_mapVector_2_dx' > H</ a > *< a href = '#SkMatrix_mapVector_2_dy' > dy</ a > +< a href = '#SkMatrix_I' > I</ a > | = ----------- , -----------
|G H < a href = '#SkMatrix_I' > I< / a > | | 1| < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > +< a href = '#SkMatrix_mapVector_2_dx' > H< / a > *< a href = '#SkMatrix_mapVector_2_dy' > dy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > G< / a > *< a href = '#SkMatrix_mapVector_2_dx' > dx< / a > +*< a href = '#SkMatrix_mapVector_2_dx' > dHy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapVector_2_dx' > < code > < strong > dx< / strong > < / code > < / a > < / td >
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< td > x-axis value of < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > map< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapVector_2_dy' > < code > < strong > dy< / strong > < / code > < / a > < / td >
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< td > y-axis value of < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > to< / a > < a href = 'SkPoint_Reference#Vector' > map< / a > < / td >
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< / tr >
< / table >
### Return Value
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mapped < a href = 'SkPoint_Reference#Vector' > vector< / a >
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### Example
< div > < fiddle-embed name = "8bf1518db3f369696cd3065b541a8bd7" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapVectors' > mapVectors< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_mapXY' > mapXY< / a >
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< a name = 'SkMatrix_mapRect' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a >
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< / pre >
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Sets < a href = '#SkMatrix_mapRect_dst' > dst< / a > < a href = '#SkMatrix_mapRect_dst' > to< / a > < a href = '#SkMatrix_mapRect_dst' > bounds< / a > < a href = '#SkMatrix_mapRect_dst' > of< / a > < a href = '#SkMatrix_mapRect_src' > src< / a > < a href = '#SkMatrix_mapRect_src' > corners< / a > < a href = '#SkMatrix_mapRect_src' > mapped< / a > < a href = '#SkMatrix_mapRect_src' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
Returns true if mapped corners are < a href = '#SkMatrix_mapRect_dst' > dst< / a > < a href = '#SkMatrix_mapRect_dst' > corners< / a > .
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Returned value is the same as calling < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > ().
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapRect_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for bounds of mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapRect_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = '#SkMatrix_mapRect_dst' > dst< / a > < a href = '#SkMatrix_mapRect_dst' > is< / a > < a href = '#SkMatrix_mapRect_dst' > equivalent< / a > < a href = '#SkMatrix_mapRect_dst' > to< / a > < a href = '#SkMatrix_mapRect_dst' > mapped< / a > < a href = '#SkMatrix_mapRect_src' > src< / a >
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### Example
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< div > < fiddle-embed name = "dbcf928b035a31ca69c99392e2e2cca9" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a >
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< a name = 'SkMatrix_mapRect_2' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#Rect' > rect< / a > ) < a href = 'SkRect_Reference#Rect' > const< / a >
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< / pre >
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Sets < a href = '#SkMatrix_mapRect_2_rect' > rect< / a > < a href = '#SkMatrix_mapRect_2_rect' > to< / a > < a href = '#SkMatrix_mapRect_2_rect' > bounds< / a > < a href = '#SkMatrix_mapRect_2_rect' > of< / a > < a href = '#SkMatrix_mapRect_2_rect' > rect< / a > < a href = '#SkMatrix_mapRect_2_rect' > corners< / a > < a href = '#SkMatrix_mapRect_2_rect' > mapped< / a > < a href = '#SkMatrix_mapRect_2_rect' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
Returns true if mapped corners are computed < a href = '#SkMatrix_mapRect_2_rect' > rect< / a > < a href = '#SkMatrix_mapRect_2_rect' > corners< / a > .
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Returned value is the same as calling < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a > ().
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapRect_2_rect' > < code > < strong > rect< / strong > < / code > < / a > < / td >
< td > rectangle to map, and storage for bounds of mapped corners< / td >
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< / tr >
< / table >
### Return Value
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true if result is equivalent to mapped < a href = '#SkMatrix_mapRect_2_rect' > rect< / a >
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### Example
< div > < fiddle-embed name = "5fafd0bd23d1ed37425b970b4a3c6cc9" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapRectScaleTranslate' > mapRectScaleTranslate< / a > < a href = '#SkMatrix_mapPoints' > mapPoints< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a >
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< a name = 'SkMatrix_mapRect_3' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = '#SkMatrix_mapRect' > mapRect< / a > (< a href = '#SkMatrix_mapRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a >
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< / pre >
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Returns bounds of < a href = '#SkMatrix_mapRect_3_src' > src< / a > < a href = '#SkMatrix_mapRect_3_src' > corners< / a > < a href = '#SkMatrix_mapRect_3_src' > mapped< / a > < a href = '#SkMatrix_mapRect_3_src' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
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### Parameters
< table > < tr > < td > < a name = 'SkMatrix_mapRect_3_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
< td > rectangle to map< / td >
< / tr >
< / table >
### Return Value
mapped bounds
### Example
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< div > < fiddle-embed name = "3b7b1f884437ab450f986234e4aec27f" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapRectToQuad' > mapRectToQuad< / a > < a href = '#SkMatrix_mapRectScaleTranslate' > mapRectScaleTranslate< / a >
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< a name = 'SkMatrix_mapRectToQuad' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapRectToQuad' > mapRectToQuad< / a > (< a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > dst< / a > [4], < a href = 'SkPoint_Reference#SkPoint' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#Rect' > rect< / a > ) < a href = 'SkRect_Reference#Rect' > const< / a >
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< / pre >
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Maps four corners of < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > to< / a > < a href = '#SkMatrix_mapRectToQuad_dst' > dst< / a > . < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > are< / a > < a href = 'SkPoint_Reference#SkPoint' > mapped< / a > < a href = 'SkPoint_Reference#SkPoint' > by< / a > < a href = 'SkPoint_Reference#SkPoint' > multiplying< / a > < a href = 'SkPoint_Reference#SkPoint' > each< / a >
< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > corner< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > corner< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > is< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > processed< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > in< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > this< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > order< / a > :
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(< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fLeft' > fLeft< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fTop' > fTop< / a > ), (< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fRight' > fRight< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fTop' > fTop< / a > ), (< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fRight' > fRight< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fBottom' > fBottom< / a > ),
(< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fLeft' > fLeft< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fBottom' > fBottom< / a > ).
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< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > may< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > be< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > empty< / a > : < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fLeft' > fLeft< / a > < a href = '#SkRect_fLeft' > may< / a > < a href = '#SkRect_fLeft' > be< / a > < a href = '#SkRect_fLeft' > greater< / a > < a href = '#SkRect_fLeft' > than< / a > < a href = '#SkRect_fLeft' > or< / a > < a href = '#SkRect_fLeft' > equal< / a > < a href = '#SkRect_fLeft' > to< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fRight' > fRight< / a > ;
< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fTop' > fTop< / a > < a href = '#SkRect_fTop' > may< / a > < a href = '#SkRect_fTop' > be< / a > < a href = '#SkRect_fTop' > greater< / a > < a href = '#SkRect_fTop' > than< / a > < a href = '#SkRect_fTop' > or< / a > < a href = '#SkRect_fTop' > equal< / a > < a href = '#SkRect_fTop' > to< / a > < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fBottom' > fBottom< / a > .
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Given:
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| A B C | | x |
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = | < a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > |, < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = | < a href = 'SkMatrix_Reference#Matrix' > y< / a > |
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| G H < a href = '#SkMatrix_I' > I< / a > | | 1 |
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where pt is initialized from each of (< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fLeft' > fLeft< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fTop' > fTop< / a > ),
(< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fRight' > fRight< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fTop' > fTop< / a > ), (< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fRight' > fRight< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fBottom' > fBottom< / a > ), (< a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fLeft' > fLeft< / a > , < a href = '#SkMatrix_mapRectToQuad_rect' > rect< / a > .< a href = '#SkRect_fBottom' > fBottom< / a > ),
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each < a href = '#SkMatrix_mapRectToQuad_dst' > dst< / a > < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < a href = 'SkPoint_Reference#SkPoint' > is< / a > < a href = 'SkPoint_Reference#SkPoint' > computed< / a > < a href = 'SkPoint_Reference#SkPoint' > as< / a > :
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|A B C| |x| Ax+By+C Dx+Ey+F
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< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > * < a href = 'SkMatrix_Reference#Matrix' > pt< / a > = |< a href = 'SkMatrix_Reference#Matrix' > D< / a > < a href = 'SkMatrix_Reference#Matrix' > E< / a > < a href = 'SkMatrix_Reference#Matrix' > F< / a > | |< a href = 'SkMatrix_Reference#Matrix' > y< / a > | = |< a href = 'SkMatrix_Reference#Matrix' > Ax< / a > +< a href = 'SkMatrix_Reference#Matrix' > By< / a > +< a href = 'SkMatrix_Reference#Matrix' > C< / a > < a href = 'SkMatrix_Reference#Matrix' > Dx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Ey< / a > +< a href = 'SkMatrix_Reference#Matrix' > F< / a > < a href = 'SkMatrix_Reference#Matrix' > Gx< / a > +< a href = 'SkMatrix_Reference#Matrix' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > | = ------- , -------
|G H < a href = '#SkMatrix_I' > I< / a > | |1| < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a > < a href = '#SkMatrix_I' > Gx< / a > +< a href = '#SkMatrix_I' > Hy< / a > +< a href = '#SkMatrix_I' > I< / a >
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapRectToQuad_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for mapped corner < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapRectToQuad_rect' > < code > < strong > rect< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < / td >
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< / tr >
< / table >
### Example
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< div > < fiddle-embed name = "c69cd2a590b5733c3cbc92cb9ceed3f5" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapRect' > mapRect< / a > < a href = '#SkMatrix_mapRectScaleTranslate' > mapRectScaleTranslate< / a >
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< a name = 'SkMatrix_mapRectScaleTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_mapRectScaleTranslate' > mapRectScaleTranslate< / a > (< a href = 'SkRect_Reference#SkRect' > SkRect< / a > * < a href = 'SkRect_Reference#SkRect' > dst< / a > , < a href = 'SkRect_Reference#SkRect' > const< / a > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > & < a href = 'SkRect_Reference#SkRect' > src< / a > ) < a href = 'SkRect_Reference#SkRect' > const< / a >
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< / pre >
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Sets < a href = '#SkMatrix_mapRectScaleTranslate_dst' > dst< / a > < a href = '#SkMatrix_mapRectScaleTranslate_dst' > to< / a > < a href = '#SkMatrix_mapRectScaleTranslate_dst' > bounds< / a > < a href = '#SkMatrix_mapRectScaleTranslate_dst' > of< / a > < a href = '#SkMatrix_mapRectScaleTranslate_src' > src< / a > < a href = '#SkMatrix_mapRectScaleTranslate_src' > corners< / a > < a href = '#SkMatrix_mapRectScaleTranslate_src' > mapped< / a > < a href = '#SkMatrix_mapRectScaleTranslate_src' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > If< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > contains< / a >
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elements other than scale or translate: asserts if SK_DEBUG is defined;
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otherwise, results are undefined.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapRectScaleTranslate_dst' > < code > < strong > dst< / strong > < / code > < / a > < / td >
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< td > storage for bounds of mapped < a href = 'SkPoint_Reference#SkPoint' > SkPoint< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_mapRectScaleTranslate_src' > < code > < strong > src< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkRect_Reference#SkRect' > SkRect< / a > < a href = 'SkRect_Reference#SkRect' > to< / a > < a href = 'SkRect_Reference#SkRect' > map< / a > < / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "62bc26989c2b4c2a54d516596a71dd97" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_mapRect' > mapRect< / a > < a href = '#SkMatrix_mapRectToQuad' > mapRectToQuad< / a > < a href = '#SkMatrix_isScaleTranslate' > isScaleTranslate< / a > < a href = '#SkMatrix_rectStaysRect' > rectStaysRect< / a >
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< a name = 'SkMatrix_mapRadius' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_mapRadius' > mapRadius< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > radius< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Returns geometric mean < a href = '#SkMatrix_mapRadius_radius' > radius< / a > < a href = '#SkMatrix_mapRadius_radius' > of< / a > < a href = '#SkMatrix_mapRadius_radius' > ellipse< / a > < a href = '#SkMatrix_mapRadius_radius' > formed< / a > < a href = '#SkMatrix_mapRadius_radius' > by< / a > < a href = '#SkMatrix_mapRadius_radius' > constructing< / a > < a href = 'undocumented#Circle' > circle< / a > < a href = 'undocumented#Circle' > of< / a >
< a href = 'undocumented#Size' > size< / a > < a href = '#SkMatrix_mapRadius_radius' > radius< / a > , < a href = '#SkMatrix_mapRadius_radius' > and< / a > < a href = '#SkMatrix_mapRadius_radius' > mapping< / a > < a href = '#SkMatrix_mapRadius_radius' > constructed< / a > < a href = 'undocumented#Circle' > circle< / a > < a href = 'undocumented#Circle' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > The< / a > < a href = 'SkMatrix_Reference#SkMatrix' > result< / a > < a href = 'SkMatrix_Reference#SkMatrix' > squared< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a >
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equal to the major axis length times the minor axis length.
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Result is not meaningful if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > < a href = 'SkMatrix_Reference#SkMatrix' > elements< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_mapRadius_radius' > < code > < strong > radius< / strong > < / code > < / a > < / td >
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< td > < a href = 'undocumented#Circle' > circle< / a > < a href = 'undocumented#Size' > size< / a > < a href = 'undocumented#Size' > to< / a > < a href = 'undocumented#Size' > map< / a > < / td >
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< / tr >
< / table >
### Return Value
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average mapped < a href = '#SkMatrix_mapRadius_radius' > radius< / a >
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### Example
< div > < fiddle-embed name = "6d6f2082fcf59d9f02bfb1758b87db69" > < div > The area enclosed by a square with sides equal to mappedRadius is the same as
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the area enclosed by the ellipse major and minor axes.
< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_mapVector' > mapVector< / a >
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< a name = 'SkMatrix_isFixedStepInX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a > () < a href = '#SkMatrix_isFixedStepInX' > const< / a >
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< / pre >
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Returns true if a unit step on x-axis at some y-axis value mapped through < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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can be represented by a constant < a href = 'SkPoint_Reference#Vector' > vector< / a > . < a href = 'SkPoint_Reference#Vector' > Returns< / a > < a href = 'SkPoint_Reference#Vector' > true< / a > < a href = 'SkPoint_Reference#Vector' > if< / a > < a href = '#SkMatrix_getType' > getType< / a > () < a href = '#SkMatrix_getType' > returns< / a >
< a href = '#SkMatrix_kIdentity_Mask' > kIdentity_Mask< / a > , < a href = '#SkMatrix_kIdentity_Mask' > or< / a > < a href = '#SkMatrix_kIdentity_Mask' > combinations< / a > < a href = '#SkMatrix_kIdentity_Mask' > of< / a > : < a href = '#SkMatrix_kTranslate_Mask' > kTranslate_Mask< / a > , < a href = '#SkMatrix_kScale_Mask' > kScale_Mask< / a > , < a href = '#SkMatrix_kScale_Mask' > and< / a > < a href = '#SkMatrix_kAffine_Mask' > kAffine_Mask< / a > .
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May return true if < a href = '#SkMatrix_getType' > getType< / a > () < a href = '#SkMatrix_getType' > returns< / a > < a href = '#SkMatrix_kPerspective_Mask' > kPerspective_Mask< / a > , < a href = '#SkMatrix_kPerspective_Mask' > but< / a > < a href = '#SkMatrix_kPerspective_Mask' > only< / a > < a href = '#SkMatrix_kPerspective_Mask' > when< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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does not include rotation or skewing along the y-axis.
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > does< / a > < a href = 'SkMatrix_Reference#SkMatrix' > not< / a > < a href = 'SkMatrix_Reference#SkMatrix' > have< / a > < a href = 'SkMatrix_Reference#SkMatrix' > complex< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a >
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### Example
< div > < fiddle-embed name = "ab57b232acef69f26de9cb23d23c8a1a" >
#### Example Output
~~~~
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
isFixedStepInX: true
[ 1.0000 0.0000 0.0000][ 0.0000 2.0000 0.0000][ 0.0000 0.0000 1.0000]
isFixedStepInX: true
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.0000 0.1000 1.0000]
isFixedStepInX: true
[ 1.0000 0.0000 0.0000][ 0.0000 2.0000 0.0000][ 0.0000 0.1000 1.0000]
isFixedStepInX: true
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.1000 0.0000 1.0000]
isFixedStepInX: false
[ 1.0000 0.0000 0.0000][ 0.0000 2.0000 0.0000][ 0.1000 0.0000 1.0000]
isFixedStepInX: false
[ 1.0000 0.0000 0.0000][ 0.0000 1.0000 0.0000][ 0.1000 0.1000 1.0000]
isFixedStepInX: false
[ 1.0000 0.0000 0.0000][ 0.0000 2.0000 0.0000][ 0.1000 0.1000 1.0000]
isFixedStepInX: false
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_fixedStepInX' > fixedStepInX< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_fixedStepInX' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'SkPoint_Reference#SkVector' > SkVector< / a > < a href = '#SkMatrix_fixedStepInX' > fixedStepInX< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > y< / a > ) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Returns < a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > representing< / a > < a href = 'SkPoint_Reference#Vector' > a< / a > < a href = 'SkPoint_Reference#Vector' > unit< / a > < a href = 'SkPoint_Reference#Vector' > step< / a > < a href = 'SkPoint_Reference#Vector' > on< / a > < a href = 'SkPoint_Reference#Vector' > x-axis< / a > < a href = 'SkPoint_Reference#Vector' > at< / a > < a href = '#SkMatrix_fixedStepInX_y' > y< / a > < a href = '#SkMatrix_fixedStepInX_y' > mapped< / a > < a href = '#SkMatrix_fixedStepInX_y' > through< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > .
If < a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a > () < a href = '#SkMatrix_isFixedStepInX' > is< / a > < a href = '#SkMatrix_isFixedStepInX' > false< / a > , < a href = '#SkMatrix_isFixedStepInX' > returned< / a > < a href = '#SkMatrix_isFixedStepInX' > value< / a > < a href = '#SkMatrix_isFixedStepInX' > is< / a > < a href = '#SkMatrix_isFixedStepInX' > undefined< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_fixedStepInX_y' > < code > < strong > y< / strong > < / code > < / a > < / td >
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< td > position of < a href = 'undocumented#Line' > line< / a > < a href = 'undocumented#Line' > parallel< / a > < a href = 'undocumented#Line' > to< / a > < a href = 'undocumented#Line' > x-axis< / a > < / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkPoint_Reference#Vector' > vector< / a > < a href = 'SkPoint_Reference#Vector' > advance< / a > < a href = 'SkPoint_Reference#Vector' > of< / a > < a href = 'SkPoint_Reference#Vector' > mapped< / a > < a href = 'SkPoint_Reference#Vector' > unit< / a > < a href = 'SkPoint_Reference#Vector' > step< / a > < a href = 'SkPoint_Reference#Vector' > on< / a > < a href = 'SkPoint_Reference#Vector' > x-axis< / a >
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### Example
< div > < fiddle-embed name = "fad6b92b21b1e1deeae61978cec2d232" > < / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_isFixedStepInX' > isFixedStepInX< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_cheapEqualTo' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_cheapEqualTo' > cheapEqualTo< / a > (< a href = '#SkMatrix_cheapEqualTo' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > m< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a >
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< / pre >
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Returns true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > equals< / a > < a href = '#SkMatrix_cheapEqualTo_m' > m< / a > , < a href = '#SkMatrix_cheapEqualTo_m' > using< / a > < a href = '#SkMatrix_cheapEqualTo_m' > an< / a > < a href = '#SkMatrix_cheapEqualTo_m' > efficient< / a > < a href = '#SkMatrix_cheapEqualTo_m' > comparison< / a > .
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Returns false when the sign of zero values is the different; when one
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< a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > positive< / a > < a href = 'SkMatrix_Reference#Matrix' > zero< / a > < a href = 'SkMatrix_Reference#Matrix' > value< / a > < a href = 'SkMatrix_Reference#Matrix' > and< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > other< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > negative< / a > < a href = 'SkMatrix_Reference#Matrix' > zero< / a > < a href = 'SkMatrix_Reference#Matrix' > value< / a > .
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Returns true even when both < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contain< / a > < a href = 'SkMatrix_Reference#SkMatrix' > NaN< / a > .
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NaN never equals any value, including itself. To improve performance, NaN values
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are treated as bit patterns that are equal if their bit patterns are equal.
### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_cheapEqualTo_m' > < code > < strong > m< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compare< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = '#SkMatrix_cheapEqualTo_m' > m< / a > < a href = '#SkMatrix_cheapEqualTo_m' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > are< / a > < a href = 'SkMatrix_Reference#SkMatrix' > represented< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > identical< / a > < a href = 'SkMatrix_Reference#SkMatrix' > bit< / a > < a href = 'SkMatrix_Reference#SkMatrix' > patterns< / a >
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### Example
< div > < fiddle-embed name = "39016b3cfc6bbabb09348a53822ce508" >
#### Example Output
~~~~
identity: a == b a.cheapEqualTo(b): true
neg zero: a == b a.cheapEqualTo(b): false
one NaN: a != b a.cheapEqualTo(b): false
both NaN: a != b a.cheapEqualTo(b): true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_equal_operator' > operator==(const SkMatrix& a, const SkMatrix& b)< / a >
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< a name = 'SkMatrix_equal_operator' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool operator==(const < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > )
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< / pre >
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Compares < a href = '#SkMatrix_equal_operator_a' > a< / a > < a href = '#SkMatrix_equal_operator_a' > and< / a > < a href = '#SkMatrix_equal_operator_b' > b< / a > ; < a href = '#SkMatrix_equal_operator_b' > returns< / a > < a href = '#SkMatrix_equal_operator_b' > true< / a > < a href = '#SkMatrix_equal_operator_b' > if< / a > < a href = '#SkMatrix_equal_operator_a' > a< / a > < a href = '#SkMatrix_equal_operator_a' > and< / a > < a href = '#SkMatrix_equal_operator_b' > b< / a > < a href = '#SkMatrix_equal_operator_b' > are< / a > < a href = '#SkMatrix_equal_operator_b' > numerically< / a > < a href = '#SkMatrix_equal_operator_b' > equal< / a > . < a href = '#SkMatrix_equal_operator_b' > Returns< / a > < a href = '#SkMatrix_equal_operator_b' > true< / a >
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even if sign of zero values are different. Returns false if either < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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contains NaN, even if the other < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > also< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > NaN< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_equal_operator_a' > < code > < strong > a< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compare< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_equal_operator_b' > < code > < strong > b< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compare< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_equal_operator_a' > a< / a > < a href = '#SkMatrix_equal_operator_a' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_equal_operator_b' > b< / a > < a href = '#SkMatrix_equal_operator_b' > are< / a > < a href = '#SkMatrix_equal_operator_b' > numerically< / a > < a href = '#SkMatrix_equal_operator_b' > equal< / a >
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### Example
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< div > < fiddle-embed name = "3902859150b0f0c4aeb1f25d00434baa" >
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#### Example Output
~~~~
identity: a == b a.cheapEqualTo(b): true
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_cheapEqualTo' > cheapEqualTo< / a > cheapEqualTo< a href = '#SkMatrix_notequal_operator' > operator!=(const SkMatrix& a, const SkMatrix& b)< / a >
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< a name = 'SkMatrix_notequal_operator' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool operator!=(const < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > )
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< / pre >
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Compares < a href = '#SkMatrix_notequal_operator_a' > a< / a > < a href = '#SkMatrix_notequal_operator_a' > and< / a > < a href = '#SkMatrix_notequal_operator_b' > b< / a > ; < a href = '#SkMatrix_notequal_operator_b' > returns< / a > < a href = '#SkMatrix_notequal_operator_b' > true< / a > < a href = '#SkMatrix_notequal_operator_b' > if< / a > < a href = '#SkMatrix_notequal_operator_a' > a< / a > < a href = '#SkMatrix_notequal_operator_a' > and< / a > < a href = '#SkMatrix_notequal_operator_b' > b< / a > < a href = '#SkMatrix_notequal_operator_b' > are< / a > < a href = '#SkMatrix_notequal_operator_b' > not< / a > < a href = '#SkMatrix_notequal_operator_b' > numerically< / a > < a href = '#SkMatrix_notequal_operator_b' > equal< / a > . < a href = '#SkMatrix_notequal_operator_b' > Returns< / a > < a href = '#SkMatrix_notequal_operator_b' > false< / a >
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even if sign of zero values are different. Returns true if either < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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contains NaN, even if the other < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > also< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > NaN< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_notequal_operator_a' > < code > < strong > a< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compare< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_notequal_operator_b' > < code > < strong > b< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > compare< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_notequal_operator_a' > a< / a > < a href = '#SkMatrix_notequal_operator_a' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_notequal_operator_b' > b< / a > < a href = '#SkMatrix_notequal_operator_b' > are< / a > < a href = '#SkMatrix_notequal_operator_b' > numerically< / a > < a href = '#SkMatrix_notequal_operator_b' > not< / a > < a href = '#SkMatrix_notequal_operator_b' > equal< / a >
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### Example
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< div > < fiddle-embed name = "088ab41f877599f980a99523749b0afd" > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_cheapEqualTo' > cheapEqualTo< / a > cheapEqualTo< a href = '#SkMatrix_equal_operator' > operator==(const SkMatrix& a, const SkMatrix& b)< / a >
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< a name = 'Utility' > < / a >
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< a name = 'SkMatrix_dump' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_dump' > dump()< / a > < a href = '#SkMatrix_dump' > const< / a >
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< / pre >
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Writes < a href = 'undocumented#Text' > text< / a > < a href = 'undocumented#Text' > representation< / a > < a href = 'undocumented#Text' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > < a href = 'SkMatrix_Reference#SkMatrix' > standard< / a > < a href = 'SkMatrix_Reference#SkMatrix' > output< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Floating< / a > < a href = 'SkPoint_Reference#Point' > point< / a > < a href = 'SkPoint_Reference#Point' > values< / a >
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are written with limited precision; it may not be possible to reconstruct
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original < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = 'SkMatrix_Reference#SkMatrix' > output< / a > .
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### Example
< div > < fiddle-embed name = "8d72a4818e5a9188348f6c08ab5d8a40" >
#### Example Output
~~~~
[ 0.7071 -0.7071 0.0000][ 0.7071 0.7071 0.0000][ 0.0000 0.0000 1.0000]
[ 0.7071 -0.7071 0.0000][ 0.7071 0.7071 0.0000][ 0.0000 0.0000 1.0000]
matrix != nearlyEqual
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = 'SkPath_Reference#SkPath' > SkPath< / a > ::< a href = '#SkPath_dump' > dump< / a >
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< a name = 'SkMatrix_getMinScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getMinScale' > getMinScale< / a > () < a href = '#SkMatrix_getMinScale' > const< / a >
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< / pre >
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Returns the minimum scaling factor of < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > decomposing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > the< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a >
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skewing elements.
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Returns -1 if scale factor overflows or < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > .
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### Return Value
minimum scale factor
### Example
< div > < fiddle-embed name = "1d6f67904c88a806c3731879e9af4ae5" >
#### Example Output
~~~~
matrix.getMinScale() 24
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getMaxScale' > getMaxScale< / a > < a href = '#SkMatrix_getMinMaxScales' > getMinMaxScales< / a >
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< a name = 'SkMatrix_getMaxScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = '#SkMatrix_getMaxScale' > getMaxScale< / a > () < a href = '#SkMatrix_getMaxScale' > const< / a >
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< / pre >
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Returns the maximum scaling factor of < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > decomposing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > the< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a >
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skewing elements.
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Returns -1 if scale factor overflows or < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > contains< / a > < a href = 'SkMatrix_Reference#SkMatrix' > perspective< / a > .
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### Return Value
maximum scale factor
### Example
< div > < fiddle-embed name = "3fee4364929899649cf9efc37897e964" >
#### Example Output
~~~~
matrix.getMaxScale() 42
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getMinScale' > getMinScale< / a > < a href = '#SkMatrix_getMinMaxScales' > getMinMaxScales< / a >
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< a name = 'SkMatrix_getMinMaxScales' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_getMinMaxScales' > getMinMaxScales< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > scaleFactors< / a > [2]) < a href = 'undocumented#SkScalar' > const< / a >
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< / pre >
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Sets < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > scaleFactors< / a > [0] < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > to< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > the< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > minimum< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > scaling< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > factor< / a > , < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > and< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > scaleFactors< / a > [1] < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > to< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > the< / a >
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maximum scaling factor. Scaling factors are computed by decomposing
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the < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scaling< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > skewing< / a > < a href = 'SkMatrix_Reference#SkMatrix' > elements< / a > .
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Returns true if < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > scaleFactors< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > are< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > found< / a > ; < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > otherwise< / a > , < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > returns< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > false< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > and< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > sets< / a >
< a href = '#SkMatrix_getMinMaxScales_scaleFactors' > scaleFactors< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > to< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > undefined< / a > < a href = '#SkMatrix_getMinMaxScales_scaleFactors' > values< / a > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_getMinMaxScales_scaleFactors' > < code > < strong > scaleFactors< / strong > < / code > < / a > < / td >
< td > storage for minimum and maximum scale factors< / td >
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< / tr >
< / table >
### Return Value
true if scale factors were computed correctly
### Example
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< div > < fiddle-embed name = "13adba0ecf5f82247cf051b4fa4d8a9c" >
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#### Example Output
~~~~
matrix.getMinMaxScales() false 2 2
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getMinScale' > getMinScale< / a > < a href = '#SkMatrix_getMaxScale' > getMaxScale< / a >
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< a name = 'SkMatrix_decomposeScale' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_decomposeScale' > decomposeScale< / a > (< a href = 'undocumented#SkSize' > SkSize< / a > * < a href = 'undocumented#SkSize' > scale< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > * < a href = 'SkMatrix_Reference#SkMatrix' > remaining< / a > = < a href = 'SkMatrix_Reference#SkMatrix' > nullptr< / a > ) < a href = 'SkMatrix_Reference#SkMatrix' > const< / a >
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< / pre >
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Decomposes < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > into< / a > < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > components< / a > < a href = '#SkMatrix_decomposeScale_scale' > and< / a > < a href = '#SkMatrix_decomposeScale_scale' > whatever< / a > < a href = '#SkMatrix_decomposeScale_scale' > remains< / a > . < a href = '#SkMatrix_decomposeScale_scale' > Returns< / a > < a href = '#SkMatrix_decomposeScale_scale' > false< / a > < a href = '#SkMatrix_decomposeScale_scale' > if< / a >
< a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > could< / a > < a href = 'SkMatrix_Reference#Matrix' > not< / a > < a href = 'SkMatrix_Reference#Matrix' > be< / a > < a href = 'SkMatrix_Reference#Matrix' > decomposed< / a > .
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< a href = 'SkMatrix_Reference#Matrix' > Sets< / a > < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > to< / a > < a href = '#SkMatrix_decomposeScale_scale' > portion< / a > < a href = '#SkMatrix_decomposeScale_scale' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > that< / a > < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > axes< / a > . < a href = '#SkMatrix_decomposeScale_scale' > Sets< / a > < a href = '#SkMatrix_decomposeScale_remaining' > remaining< / a > < a href = '#SkMatrix_decomposeScale_remaining' > to< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a >
< a href = 'SkMatrix_Reference#Matrix' > with< / a > < a href = 'SkMatrix_Reference#Matrix' > scaling< / a > < a href = 'SkMatrix_Reference#Matrix' > factored< / a > < a href = 'SkMatrix_Reference#Matrix' > out< / a > . < a href = '#SkMatrix_decomposeScale_remaining' > remaining< / a > < a href = '#SkMatrix_decomposeScale_remaining' > may< / a > < a href = '#SkMatrix_decomposeScale_remaining' > be< / a > < a href = '#SkMatrix_decomposeScale_remaining' > passed< / a > < a href = '#SkMatrix_decomposeScale_remaining' > as< / a > < a href = '#SkMatrix_decomposeScale_remaining' > nullptr< / a >
< a href = '#SkMatrix_decomposeScale_remaining' > to< / a > < a href = '#SkMatrix_decomposeScale_remaining' > determine< / a > < a href = '#SkMatrix_decomposeScale_remaining' > if< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > can< / a > < a href = 'SkMatrix_Reference#Matrix' > be< / a > < a href = 'SkMatrix_Reference#Matrix' > decomposed< / a > < a href = 'SkMatrix_Reference#Matrix' > without< / a > < a href = 'SkMatrix_Reference#Matrix' > computing< / a > < a href = 'SkMatrix_Reference#Matrix' > remainder< / a > .
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< a href = 'SkMatrix_Reference#Matrix' > Returns< / a > < a href = 'SkMatrix_Reference#Matrix' > true< / a > < a href = 'SkMatrix_Reference#Matrix' > if< / a > < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > components< / a > < a href = '#SkMatrix_decomposeScale_scale' > are< / a > < a href = '#SkMatrix_decomposeScale_scale' > found< / a > . < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > and< / a > < a href = '#SkMatrix_decomposeScale_remaining' > remaining< / a > < a href = '#SkMatrix_decomposeScale_remaining' > are< / a >
< a href = '#SkMatrix_decomposeScale_remaining' > unchanged< / a > < a href = '#SkMatrix_decomposeScale_remaining' > if< / a > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > contains< / a > < a href = 'SkMatrix_Reference#Matrix' > perspective< / a > ; < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > factors< / a > < a href = '#SkMatrix_decomposeScale_scale' > are< / a > < a href = '#SkMatrix_decomposeScale_scale' > not< / a > < a href = '#SkMatrix_decomposeScale_scale' > finite< / a > , < a href = '#SkMatrix_decomposeScale_scale' > or< / a >
< a href = '#SkMatrix_decomposeScale_scale' > are< / a > < a href = '#SkMatrix_decomposeScale_scale' > nearly< / a > < a href = '#SkMatrix_decomposeScale_scale' > zero< / a > .
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< a href = '#SkMatrix_decomposeScale_scale' > On< / a > < a href = '#SkMatrix_decomposeScale_scale' > success< / a > : < code > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > = < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > * < a href = '#SkMatrix_decomposeScale_scale' > Remaining< / a > < / code > .
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_decomposeScale_scale' > < code > < strong > scale< / strong > < / code > < / a > < / td >
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< td > axes scaling factors; may be nullptr< / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_decomposeScale_remaining' > < code > < strong > remaining< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#Matrix' > Matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > without< / a > < a href = 'SkMatrix_Reference#Matrix' > scaling< / a > ; < a href = 'SkMatrix_Reference#Matrix' > may< / a > < a href = 'SkMatrix_Reference#Matrix' > be< / a > < a href = 'SkMatrix_Reference#Matrix' > nullptr< / a > < / td >
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< / tr >
< / table >
### Return Value
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true if < a href = '#SkMatrix_decomposeScale_scale' > scale< / a > < a href = '#SkMatrix_decomposeScale_scale' > can< / a > < a href = '#SkMatrix_decomposeScale_scale' > be< / a > < a href = '#SkMatrix_decomposeScale_scale' > computed< / a >
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### Example
< div > < fiddle-embed name = "139b874da0a3ede1f3df88119085c0aa" >
#### Example Output
~~~~
[ 0.0000 -0.2500 0.0000][ 0.5000 0.0000 0.0000][ 0.0000 0.0000 1.0000]
success: true scale: 0.5, 0.25
[ 0.0000 -0.5000 0.0000][ 2.0000 0.0000 0.0000][ 0.0000 0.0000 1.0000]
[ 0.0000 -0.2500 0.0000][ 0.5000 0.0000 0.0000][ 0.0000 0.0000 1.0000]
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_MakeScale' > MakeScale< / a >
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< a name = 'SkMatrix_I' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static const < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_I' > I< / a > ()
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< / pre >
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Returns reference to const identity < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Returned< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > set< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| 1 0 0 |
| 0 1 0 |
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| 0 0 1 |
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### Return Value
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const identity < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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### Example
< div > < fiddle-embed name = "d961d91020f19037204a8c3fd8cb1060" >
#### Example Output
~~~~
m1 == m2
m2 == m3
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_reset' > reset()< / a > < a href = '#SkMatrix_setIdentity' > setIdentity< / a >
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< a name = 'SkMatrix_InvalidMatrix' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static const < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = '#SkMatrix_InvalidMatrix' > InvalidMatrix< / a > ()
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< / pre >
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Returns reference to a const < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > invalid< / a > < a href = 'SkMatrix_Reference#SkMatrix' > values< / a > . < a href = 'SkMatrix_Reference#SkMatrix' > Returned< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > is< / a > < a href = 'SkMatrix_Reference#SkMatrix' > set< / a >
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to:
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| < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > |
| < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > |
| < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > < a href = 'undocumented#SK_ScalarMax' > SK_ScalarMax< / a > |
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### Return Value
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const invalid < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a >
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### Example
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< div > < fiddle-embed name = "af0b72360c1c7a25b4754bfa47011dd5" >
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#### Example Output
~~~~
scaleX 3.40282e+38
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_Concat' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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static < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_Concat' > Concat< / a > (< a href = '#SkMatrix_Concat' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > a< / a > , < a href = 'SkMatrix_Reference#SkMatrix' > const< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > & < a href = 'SkMatrix_Reference#SkMatrix' > b< / a > )
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< / pre >
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Returns < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_Concat_a' > a< / a > < a href = '#SkMatrix_Concat_a' > multiplied< / a > < a href = '#SkMatrix_Concat_a' > by< / a > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = '#SkMatrix_Concat_b' > b< / a > .
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Given:
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| A B C | | J K L |
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< a href = '#SkMatrix_Concat_a' > a< / a > = | < a href = '#SkMatrix_Concat_a' > D< / a > < a href = '#SkMatrix_Concat_a' > E< / a > < a href = '#SkMatrix_Concat_a' > F< / a > |, < a href = '#SkMatrix_Concat_b' > b< / a > = | < a href = '#SkMatrix_Concat_b' > M< / a > < a href = '#SkMatrix_Concat_b' > N< / a > < a href = '#SkMatrix_Concat_b' > O< / a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > |
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sets < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > to< / a > :
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| A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR |
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< a href = '#SkMatrix_Concat_a' > a</ a > * <a href='#SkMatrix_Concat_b'>b</a> = | <a href='#SkMatrix_Concat_b'>D</a> <a href='#SkMatrix_Concat_b'>E</a> <a href='#SkMatrix_Concat_b'>F</a> | * | < a href = '#SkMatrix_Concat_b' > M</ a > < a href = '#SkMatrix_Concat_b' > N</ a > < a href = '#SkMatrix_Concat_b' > O</ a > | = | < a href = '#SkMatrix_Concat_b' > DJ</ a > +< a href = '#SkMatrix_Concat_b' > EM</ a > +< a href = '#SkMatrix_Concat_b' > FP</ a > < a href = '#SkMatrix_Concat_b' > DK</ a > +< a href = '#SkMatrix_Concat_b' > EN</ a > +< a href = '#SkMatrix_Concat_b' > FQ</ a > < a href = '#SkMatrix_Concat_b' > DL</ a > +< a href = '#SkMatrix_Concat_b' > EO</ a > +< a href = '#SkMatrix_Concat_b' > FR</ a > |
| G H < a href = '#SkMatrix_I' > I< / a > | | < a href = '#SkMatrix_I' > P< / a > < a href = '#SkMatrix_I' > Q< / a > < a href = '#SkMatrix_I' > R< / a > | | < a href = '#SkMatrix_I' > GJ< / a > +< a href = '#SkMatrix_I' > HM< / a > +< a href = '#SkMatrix_I' > IP< / a > < a href = '#SkMatrix_I' > GK< / a > +< a href = '#SkMatrix_I' > HN< / a > +< a href = '#SkMatrix_I' > IQ< / a > < a href = '#SkMatrix_I' > GL< / a > +< a href = '#SkMatrix_I' > HO< / a > +< a href = '#SkMatrix_I' > IR< / a > |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_Concat_a' > < code > < strong > a< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > left side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< tr > < td > < a name = 'SkMatrix_Concat_b' > < code > < strong > b< / strong > < / code > < / a > < / td >
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< td > < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > on< / a > < a href = 'SkMatrix_Reference#SkMatrix' > right side< / a > < a href = 'SkMatrix_Reference#SkMatrix' > of< / a > < a href = 'SkMatrix_Reference#SkMatrix' > multiply< / a > < a href = 'SkMatrix_Reference#SkMatrix' > expression< / a > < / td >
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< / tr >
< / table >
### Return Value
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< a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > computed< / a > < a href = 'SkMatrix_Reference#SkMatrix' > from< / a > < a href = '#SkMatrix_Concat_a' > a< / a > < a href = '#SkMatrix_Concat_a' > times< / a > < a href = '#SkMatrix_Concat_b' > b< / a >
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### Example
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< div > < fiddle-embed name = "6b4562c7052da94f3d5b2412dca41946" > < div > < a href = '#SkMatrix_setPolyToPoly' > setPolyToPoly< / a > < a href = '#SkMatrix_setPolyToPoly' > creates< / a > < a href = '#SkMatrix_setPolyToPoly' > perspective< / a > < a href = 'SkMatrix_Reference#Matrix' > matrices< / a > , < a href = 'SkMatrix_Reference#Matrix' > one< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > of< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > other< / a > .
< a href = 'SkMatrix_Reference#Matrix' > Multiplying< / a > < a href = 'SkMatrix_Reference#Matrix' > the< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > by< / a > < a href = 'SkMatrix_Reference#Matrix' > its< / a > < a href = 'SkMatrix_Reference#Matrix' > inverse< / a > < a href = 'SkMatrix_Reference#Matrix' > turns< / a > < a href = 'SkMatrix_Reference#Matrix' > into< / a > < a href = 'SkMatrix_Reference#Matrix' > an< / a > < a href = 'SkMatrix_Reference#Matrix' > identity< / a > < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > .
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< / div > < / fiddle-embed > < / div >
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### See Also
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< a href = '#SkMatrix_preConcat' > preConcat< / a > < a href = '#SkMatrix_postConcat' > postConcat< / a >
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< a name = 'SkMatrix_dirtyMatrixTypeCache' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
void < a href = '#SkMatrix_dirtyMatrixTypeCache' > dirtyMatrixTypeCache< / a > ()
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< / pre >
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Sets internal cache to unknown state. Use to force update after repeated
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modifications to < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > element< / a > < a href = 'SkMatrix_Reference#SkMatrix' > reference< / a > < a href = 'SkMatrix_Reference#SkMatrix' > returned< / a > < a href = 'SkMatrix_Reference#SkMatrix' > by< / a > by< a href = '#SkMatrix_array1_operator' > operator[](int index)< / a > .
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### Example
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< div > < fiddle-embed name = "f4365ef332f51f7fd25040e0771ba9a2" >
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#### Example Output
~~~~
with identity matrix: x = 24
after skew x mod: x = 24
after 2nd skew x mod: x = 24
after dirty cache: x = 66
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_array1_operator' > operator[](int index)< / a > < a href = '#SkMatrix_getType' > getType< / a >
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< a name = 'SkMatrix_setScaleTranslate' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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void < a href = '#SkMatrix_setScaleTranslate' > setScaleTranslate< / a > (< a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > sy< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > tx< / a > , < a href = 'undocumented#SkScalar' > SkScalar< / a > < a href = 'undocumented#SkScalar' > ty< / a > )
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< / pre >
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Initializes < a href = 'SkMatrix_Reference#SkMatrix' > SkMatrix< / a > < a href = 'SkMatrix_Reference#SkMatrix' > with< / a > < a href = 'SkMatrix_Reference#SkMatrix' > scale< / a > < a href = 'SkMatrix_Reference#SkMatrix' > and< / a > < a href = 'SkMatrix_Reference#SkMatrix' > translate< / a > < a href = 'SkMatrix_Reference#SkMatrix' > elements< / a > .
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| < a href = '#SkMatrix_setScaleTranslate_sx' > sx< / a > 0 < a href = '#SkMatrix_setScaleTranslate_tx' > tx< / a > |
| 0 < a href = '#SkMatrix_setScaleTranslate_sy' > sy< / a > < a href = '#SkMatrix_setScaleTranslate_ty' > ty< / a > |
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| 0 0 1 |
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### Parameters
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< table > < tr > < td > < a name = 'SkMatrix_setScaleTranslate_sx' > < code > < strong > sx< / strong > < / code > < / a > < / td >
< td > horizontal scale factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScaleTranslate_sy' > < code > < strong > sy< / strong > < / code > < / a > < / td >
< td > vertical scale factor to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScaleTranslate_tx' > < code > < strong > tx< / strong > < / code > < / a > < / td >
< td > horizontal translation to store< / td >
< / tr >
< tr > < td > < a name = 'SkMatrix_setScaleTranslate_ty' > < code > < strong > ty< / strong > < / code > < / a > < / td >
< td > vertical translation to store< / td >
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< / tr >
< / table >
### Example
< div > < fiddle-embed name = "fed43797f13796529cb6731385d6f8f3" >
#### Example Output
~~~~
[ 1.0000 0.0000 3.0000][ 0.0000 2.0000 4.0000][ 0.0000 0.0000 1.0000]
~~~~
< / fiddle-embed > < / div >
### See Also
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< a href = '#SkMatrix_setScale' > setScale< / a > < a href = '#SkMatrix_preTranslate' > preTranslate< / a > < a href = '#SkMatrix_postTranslate' > postTranslate< / a >
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< a name = 'SkMatrix_isFinite' > < / a >
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---
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< pre style = "padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0 " >
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bool < a href = '#SkMatrix_isFinite' > isFinite< / a > () < a href = '#SkMatrix_isFinite' > const< / a >
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< / pre >
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Returns true if all elements of the < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > are< / a > < a href = 'SkMatrix_Reference#Matrix' > finite< / a > . < a href = 'SkMatrix_Reference#Matrix' > Returns< / a > < a href = 'SkMatrix_Reference#Matrix' > false< / a > < a href = 'SkMatrix_Reference#Matrix' > if< / a > < a href = 'SkMatrix_Reference#Matrix' > any< / a >
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element is infinity, or NaN.
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### Return Value
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true if < a href = 'SkMatrix_Reference#Matrix' > matrix< / a > < a href = 'SkMatrix_Reference#Matrix' > has< / a > < a href = 'SkMatrix_Reference#Matrix' > only< / a > < a href = 'SkMatrix_Reference#Matrix' > finite< / a > < a href = 'SkMatrix_Reference#Matrix' > elements< / a >
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### Example
< div > < fiddle-embed name = "bc6c6f6a5df770287120d87f81b922eb" >
#### Example Output
~~~~
[ 1.0000 0.0000 nan][ 0.0000 1.0000 0.0000][ 0.0000 0.0000 1.0000]
matrix is finite: false
matrix != matrix
~~~~
< / fiddle-embed > < / div >
### See Also
operator==
