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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* 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 GFX_LAYERS_BLOBSURFACE_H
#define GFX_LAYERS_BLOBSURFACE_H
#include <stdint.h> // for uint8_t, uint32_t
#include "mozilla/Attributes.h" // for MOZ_STACK_CLASS
#include "mozilla/RefPtr.h" // for already_AddRefed
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/gfx/Types.h" // for SurfaceFormat
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
namespace mozilla {
namespace gfx {
class DataSourceSurface;
class DrawTarget;
} // namespace gfx
} // namespace mozilla
namespace mozilla {
namespace layers {
namespace ImageDataSerializer {
// RGB
int32_t ComputeRGBStride(gfx::SurfaceFormat aFormat, int32_t aWidth);
int32_t GetRGBStride(const RGBDescriptor& aDescriptor);
uint32_t ComputeRGBBufferSize(gfx::IntSize aSize, gfx::SurfaceFormat aFormat);
// YCbCr
///This function is meant as a helper to know how much shared memory we need
///to allocate in a shmem in order to place a shared YCbCr image blob of
///given dimensions.
uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
int32_t aYStride,
const gfx::IntSize& aCbCrSize,
int32_t aCbCrStride);
uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
const gfx::IntSize& aCbCrSize);
uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize);
void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
int32_t cbCrStride, int32_t cbCrHeight,
uint32_t& outYOffset, uint32_t& outCbOffset, uint32_t& outCrOffset);
gfx::SurfaceFormat FormatFromBufferDescriptor(const BufferDescriptor& aDescriptor);
gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
Maybe<YUVColorSpace> YUVColorSpaceFromBufferDescriptor(const BufferDescriptor& aDescriptor);
Maybe<StereoMode> StereoModeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
already_AddRefed<gfx::DataSourceSurface>
DataSourceSurfaceFromYCbCrDescriptor(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, gfx::DataSourceSurface* aSurface = nullptr);
void ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer,
const YCbCrDescriptor& aDescriptor,
const gfx::SurfaceFormat& aDestFormat,
const gfx::IntSize& aDestSize,
unsigned char* aDestBuffer,
int32_t aStride);
} // ImageDataSerializer
} // namespace layers
} // namespace mozilla
#endif
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