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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrColorSpaceXform_DEFINED
#define GrColorSpaceXform_DEFINED
#include "GrColor.h"
#include "SkMatrix44.h"
#include "SkRefCnt.h"
class SkColorSpace;
/**
* Represents a color gamut transformation (as a 4x4 color matrix)
*/
class GrColorSpaceXform : public SkRefCnt {
public:
GrColorSpaceXform(const SkMatrix44& srcToDst);
static sk_sp<GrColorSpaceXform> Make(const SkColorSpace* src, const SkColorSpace* dst);
const SkMatrix44& srcToDst() const { return fSrcToDst; }
/**
* GrGLSLFragmentProcessor::GenKey() must call this and include the returned value in its
* computed key.
*/
static uint32_t XformKey(const GrColorSpaceXform* xform) {
// Code generation changes if there is an xform, but it otherwise constant
return SkToBool(xform) ? 1 : 0;
}
static bool Equals(const GrColorSpaceXform* a, const GrColorSpaceXform* b);
GrColor4f apply(const GrColor4f& srcColor);
private:
SkMatrix44 fSrcToDst;
};
#endif
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