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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_SWIZZLE_H_
#define MOZILLA_GFX_SWIZZLE_H_
#include "Point.h"
namespace mozilla {
namespace gfx {
/**
* Premultiplies source and writes it to destination. Source and destination may
* be the same to premultiply in-place. The source format must have an alpha
* channel.
*/
GFX2D_API bool PremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst,
int32_t aDstStride, SurfaceFormat aDstFormat,
const IntSize& aSize);
/**
* Unpremultiplies source and writes it to destination. Source and destination
* may be the same to unpremultiply in-place. Both the source and destination
* formats must have an alpha channel.
*/
GFX2D_API bool UnpremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst,
int32_t aDstStride, SurfaceFormat aDstFormat,
const IntSize& aSize);
/**
* Swizzles source and writes it to destination. Source and destination may be
* the same to swizzle in-place.
*/
GFX2D_API bool SwizzleData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst,
int32_t aDstStride, SurfaceFormat aDstFormat,
const IntSize& aSize);
/**
* Swizzles source and writes it to destination. Source and destination may be
* the same to swizzle in-place.
*/
typedef void (*SwizzleRowFn)(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength);
/**
* Get a function pointer to perform premultiplication between two formats.
*/
GFX2D_API SwizzleRowFn PremultiplyRow(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat);
/**
* Get a function pointer to perform unpremultiplication between two formats.
*/
GFX2D_API SwizzleRowFn UnpremultiplyRow(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat);
/**
* Get a function pointer to perform swizzling between two formats.
*/
GFX2D_API SwizzleRowFn SwizzleRow(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat);
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_SWIZZLE_H_ */
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