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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 "SkImageInfo.h"
class SkColorSpace;
class SK_API SkColorSpaceXform : SkNoncopyable {
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(SkColorSpace* srcSpace, SkColorSpace* dstSpace);
enum ColorFormat {
kRGBA_8888_ColorFormat,
kBGRA_8888_ColorFormat,
// Unsigned, big-endian, 16-bit integer
kRGBA_U16_BE_ColorFormat, // Src only
kRGBA_F16_ColorFormat, // Dst only
kRGBA_F32_ColorFormat, // Dst only
};
/**
* Apply the color conversion to a |src| buffer, storing the output in the |dst| buffer.
*
* F16 and F32 are only supported as dst color formats, and only when the dst color space
* is linear. This function will return false in unsupported cases.
*
* @param dst Stored in the format described by |dstColorFormat|
* @param src Stored in the format described by |srcColorFormat|
* @param len Number of pixels in the buffers
* @param dstColorFormat Describes color format of |dst|
* @param srcColorFormat Describes color format of |src|
* @param alphaType Describes alpha properties of the |dst| (and |src|)
* kUnpremul preserves input alpha values
* kPremul performs a premultiplication and also preserves alpha values
* kOpaque optimization hint, |dst| alphas set to 1
*
*/
bool apply(ColorFormat dstFormat, void* dst, ColorFormat srcFormat, const void* src, int count,
SkAlphaType alphaType) const;
virtual ~SkColorSpaceXform() {}
protected:
SkColorSpaceXform() {}
};
#endif
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