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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 SkColorSpaceXform_DEFINED
#define SkColorSpaceXform_DEFINED
#include "SkColorSpace.h"
class SkColorSpaceXform {
public:
/**
* Create an object to handle color space conversions.
*
* @param srcSpace The encoded color space.
* @param dstSpace The destination color space.
*
*/
static std::unique_ptr<SkColorSpaceXform> New(const sk_sp<SkColorSpace>& srcSpace,
const sk_sp<SkColorSpace>& dstSpace);
/**
* Apply the color conversion to a src buffer, storing the output in the dst buffer.
* The src is stored in RGBA_8888 and the dst is stored in 8888 platform format.
* The output is not premultiplied.
*/
virtual void xform_RGBA_8888(uint32_t* dst, const uint32_t* src, uint32_t len) const = 0;
virtual ~SkColorSpaceXform() {}
};
class SkGammaByValueXform : public SkColorSpaceXform {
public:
void xform_RGBA_8888(uint32_t* dst, const uint32_t* src, uint32_t len) const override;
private:
SkGammaByValueXform(float srcGammas[3], const SkMatrix44& srcToDst, float dstGammas[3]);
float fSrcGammas[3];
const SkMatrix44 fSrcToDst;
float fDstGammas[3];
friend class SkColorSpaceXform;
};
#endif
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