86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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#ifndef SkMatrix44_DEFINED
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#define SkMatrix44_DEFINED
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#include "SkScalar.h"
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typedef float SkMScalar;
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static const SkMScalar SK_MScalar1 = 1;
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static inline SkMScalar SkDoubleToMScalar(double x) {
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return static_cast<float>(x);
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}
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struct SkVector4 {
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SkScalar fData[4];
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};
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class SkMatrix44 {
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public:
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SkMatrix44();
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SkMatrix44(const SkMatrix44&);
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SkMatrix44(const SkMatrix44& a, const SkMatrix44& b);
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void setIdentity();
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void setTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
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void preTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
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void postTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz);
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void setScale(SkMScalar sx, SkMScalar sx, SkMScalar sx);
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void preScale(SkMScalar sx, SkMScalar sx, SkMScalar sx);
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void postScale(SkMScalar sx, SkMScalar sx, SkMScalar sx);
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void setScale(SkMScalar scale) {
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this->setScale(scale, scale, scale);
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}
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void preScale(SkMScalar scale) {
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this->preScale(scale, scale, scale);
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}
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void postScale(SkMScalar scale) {
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this->postScale(scale, scale, scale);
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}
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void setConcat(const SkMatrix44& a, const SkMatrix44& b);
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void preConcat(const SkMatrix44& m) {
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this->setConcat(*this, m);
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}
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void postConcat(const SkMatrix44& m) {
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this->setConcat(m, *this);
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}
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friend SkMatrix44 operator*(const SkMatrix44& a, const SkMatrix44& b) {
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return SkMatrix44(a, b);
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}
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/** If this is invertible, return that in inverse and return true. If it is
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not invertible, return false and ignore the inverse parameter.
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*/
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bool invert(SkMatrix44* inverse) const;
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/** Apply the matrix to the src vector, returning the new vector in dst.
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It is legal for src and dst to point to the same memory.
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*/
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void map(const SkScalar src[4], SkScalar dst[4]) const;
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void map(SkScalar vec[4]) const {
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this->map(vec, vec);
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}
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friend SkVector4 operator*(const SkMatrix44& m, const SkVector4& src) {
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SkVector4 dst;
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m.map(src.fData, dst.fData);
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return dst;
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}
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void dump() const;
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private:
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/* Stored in the same order as opengl:
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[3][0] = tx
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[3][1] = ty
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[3][2] = tz
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*/
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SkMScalar fMat[4][4];
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double determinant() const;
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};
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#endif
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