d26147adbb
M include/effects/SkAvoidXfermode.h M include/effects/SkDiscretePathEffect.h M include/effects/Sk1DPathEffect.h M include/effects/Sk2DPathEffect.h M include/effects/SkBlurDrawLooper.h M include/effects/SkPixelXorXfermode.h M include/effects/SkDashPathEffect.h M include/effects/SkColorMatrixFilter.h M include/effects/SkEmbossMaskFilter.h M include/effects/SkLayerDrawLooper.h M include/effects/SkGroupShape.h M include/effects/SkBlurImageFilter.h M include/effects/SkRectShape.h A include/effects/SkEffects.h M include/effects/SkCornerPathEffect.h M include/effects/SkGradientShader.h M include/effects/SkBlurMaskFilter.h M include/effects/SkLayerRasterizer.h M include/core/SkMallocPixelRef.h M include/core/SkFlattenable.h M include/core/SkShape.h M include/core/SkPixelRef.h M include/core/SkGraphics.h M include/core/SkPathEffect.h M include/core/SkPostConfig.h M include/core/SkXfermode.h M include/core/SkColorFilter.h M include/images/SkFlipPixelRef.h M include/images/SkImageRef_GlobalPool.h M src/effects/SkDashPathEffect.cpp M src/effects/SkColorMatrixFilter.cpp M src/effects/SkBlurImageFilter.cpp M src/effects/SkGroupShape.cpp M src/effects/SkCornerPathEffect.cpp M src/effects/SkGradientShader.cpp M src/effects/SkBlurMaskFilter.cpp M src/effects/SkAvoidXfermode.cpp M src/effects/Sk2DPathEffect.cpp M src/effects/SkBlurDrawLooper.cpp M src/effects/SkPixelXorXfermode.cpp M src/effects/SkColorFilters.cpp M src/effects/SkLayerDrawLooper.cpp M src/effects/SkRectShape.cpp A src/effects/SkEffects.cpp M src/effects/SkLayerRasterizer.cpp M src/effects/SkDiscretePathEffect.cpp M src/effects/Sk1DPathEffect.cpp A src/effects/SkEffects_none.cpp M src/core/SkPixelRef.cpp M src/core/SkGraphics.cpp M src/core/SkFlattenable.cpp M src/core/SkBitmapProcShader.h M src/core/SkPathEffect.cpp M src/core/SkShape.cpp M src/core/SkXfermode.cpp M src/core/SkMallocPixelRef.cpp M src/core/SkBitmapProcShader.cpp M src/images/SkFlipPixelRef.cpp M src/images/SkImageRef_GlobalPool.cpp A src/ports/SkGlobalInitialization_chromium.cpp M src/ports/SkImageRef_ashmem.h M src/ports/SkImageRef_ashmem.cpp A src/ports/SkGlobalInitialization_default.cpp M gyp/effects.gyp M gyp/tools.gyp M gyp/ports.gyp git-svn-id: http://skia.googlecode.com/svn/trunk@2876 2bbb7eff-a529-9590-31e7-b0007b416f81
121 lines
6.8 KiB
C++
121 lines
6.8 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkGradientShader_DEFINED
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#define SkGradientShader_DEFINED
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#include "SkShader.h"
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class SkUnitMapper;
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/** \class SkGradientShader
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SkGradientShader hosts factories for creating subclasses of SkShader that
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render linear and radial gradients.
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*/
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class SK_API SkGradientShader {
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public:
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/** Returns a shader that generates a linear gradient between the two
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specified points.
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<p />
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CreateLinear returns a shader with a reference count of 1.
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The caller should decrement the shader's reference count when done with the shader.
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It is an error for count to be < 2.
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@param pts The start and end points for the gradient.
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@param colors The array[count] of colors, to be distributed between the two points
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@param pos May be NULL. array[count] of SkScalars, or NULL, of the relative position of
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each corresponding color in the colors array. If this is NULL,
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the the colors are distributed evenly between the start and end point.
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If this is not null, the values must begin with 0, end with 1.0, and
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intermediate values must be strictly increasing.
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@param count Must be >=2. The number of colors (and pos if not NULL) entries.
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@param mode The tiling mode
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@param mapper May be NULL. Callback to modify the spread of the colors.
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*/
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static SkShader* CreateLinear( const SkPoint pts[2],
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const SkColor colors[], const SkScalar pos[], int count,
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SkShader::TileMode mode,
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SkUnitMapper* mapper = NULL);
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/** Returns a shader that generates a radial gradient given the center and radius.
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<p />
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CreateRadial returns a shader with a reference count of 1.
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The caller should decrement the shader's reference count when done with the shader.
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It is an error for colorCount to be < 2, or for radius to be <= 0.
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@param center The center of the circle for this gradient
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@param radius Must be positive. The radius of the circle for this gradient
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@param colors The array[count] of colors, to be distributed between the center and edge of the circle
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@param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative position of
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each corresponding color in the colors array. If this is NULL,
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the the colors are distributed evenly between the center and edge of the circle.
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If this is not null, the values must begin with 0, end with 1.0, and
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intermediate values must be strictly increasing.
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@param count Must be >= 2. The number of colors (and pos if not NULL) entries
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@param mode The tiling mode
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@param mapper May be NULL. Callback to modify the spread of the colors.
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*/
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static SkShader* CreateRadial( const SkPoint& center, SkScalar radius,
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const SkColor colors[], const SkScalar pos[], int count,
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SkShader::TileMode mode,
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SkUnitMapper* mapper = NULL);
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/** Returns a shader that generates a radial gradient given the start position, start radius, end position and end radius.
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<p />
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CreateTwoPointRadial returns a shader with a reference count of 1.
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The caller should decrement the shader's reference count when done with the shader.
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It is an error for colorCount to be < 2, for startRadius or endRadius to be < 0, or for
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startRadius to be equal to endRadius.
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@param start The center of the start circle for this gradient
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@param startRadius Must be positive. The radius of the start circle for this gradient.
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@param end The center of the end circle for this gradient
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@param endRadius Must be positive. The radius of the end circle for this gradient.
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@param colors The array[count] of colors, to be distributed between the center and edge of the circle
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@param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative position of
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each corresponding color in the colors array. If this is NULL,
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the the colors are distributed evenly between the center and edge of the circle.
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If this is not null, the values must begin with 0, end with 1.0, and
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intermediate values must be strictly increasing.
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@param count Must be >= 2. The number of colors (and pos if not NULL) entries
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@param mode The tiling mode
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@param mapper May be NULL. Callback to modify the spread of the colors.
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*/
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static SkShader* CreateTwoPointRadial(const SkPoint& start,
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SkScalar startRadius,
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const SkPoint& end,
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SkScalar endRadius,
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const SkColor colors[],
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const SkScalar pos[], int count,
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SkShader::TileMode mode,
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SkUnitMapper* mapper = NULL);
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/** Returns a shader that generates a sweep gradient given a center.
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<p />
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CreateSweep returns a shader with a reference count of 1.
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The caller should decrement the shader's reference count when done with the shader.
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It is an error for colorCount to be < 2.
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@param cx The X coordinate of the center of the sweep
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@param cx The Y coordinate of the center of the sweep
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@param colors The array[count] of colors, to be distributed around the center.
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@param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative position of
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each corresponding color in the colors array. If this is NULL,
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the the colors are distributed evenly between the center and edge of the circle.
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If this is not null, the values must begin with 0, end with 1.0, and
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intermediate values must be strictly increasing.
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@param count Must be >= 2. The number of colors (and pos if not NULL) entries
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@param mapper May be NULL. Callback to modify the spread of the colors.
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*/
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static SkShader* CreateSweep(SkScalar cx, SkScalar cy,
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const SkColor colors[], const SkScalar pos[],
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int count, SkUnitMapper* mapper = NULL);
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SK_DECLARE_FLATTENABLE_REGISTRAR()
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};
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#endif
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