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/*
* Copyright 2007 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkColorMatrix_DEFINED
#define SkColorMatrix_DEFINED
#include "SkScalar.h"
class SK_API SkColorMatrix {
public:
enum {
kCount = 20
};
SkScalar fMat[kCount];
enum Elem {
kR_Scale = 0,
kG_Scale = 6,
kB_Scale = 12,
kA_Scale = 18,
kR_Trans = 4,
kG_Trans = 9,
kB_Trans = 14,
kA_Trans = 19,
};
void setIdentity();
void setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
SkScalar aScale = SK_Scalar1);
void preScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
SkScalar aScale = SK_Scalar1);
void postScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
SkScalar aScale = SK_Scalar1);
void postTranslate(SkScalar rTrans, SkScalar gTrans, SkScalar bTrans,
SkScalar aTrans = 0);
enum Axis {
kR_Axis = 0,
kG_Axis = 1,
kB_Axis = 2
};
void setRotate(Axis, SkScalar degrees);
void setSinCos(Axis, SkScalar sine, SkScalar cosine);
void preRotate(Axis, SkScalar degrees);
void postRotate(Axis, SkScalar degrees);
void setConcat(const SkColorMatrix& a, const SkColorMatrix& b);
void preConcat(const SkColorMatrix& mat) { this->setConcat(*this, mat); }
void postConcat(const SkColorMatrix& mat) { this->setConcat(mat, *this); }
void setSaturation(SkScalar sat);
void setRGB2YUV();
void setYUV2RGB();
bool operator==(const SkColorMatrix& other) const {
return 0 == memcmp(fMat, other.fMat, sizeof(fMat));
}
bool operator!=(const SkColorMatrix& other) const { return !((*this) == other); }
static bool NeedsClamping(const SkScalar[20]);
static void SetConcat(SkScalar result[20], const SkScalar outer[20], const SkScalar inner[20]);
};
#endif
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