зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
2.5 KiB
C++
75 строки
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_LAYERS_BLOBSURFACE_H
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#define GFX_LAYERS_BLOBSURFACE_H
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#include <stdint.h> // for uint8_t, uint32_t
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#include "mozilla/Attributes.h" // for MOZ_STACK_CLASS
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#include "mozilla/RefPtr.h" // for already_AddRefed
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#include "mozilla/gfx/Point.h" // for IntSize
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#include "mozilla/gfx/Types.h" // for SurfaceFormat
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namespace mozilla {
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namespace gfx {
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class DataSourceSurface;
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class DrawTarget;
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} // namespace gfx
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} // namespace mozilla
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namespace mozilla {
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namespace layers {
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namespace ImageDataSerializer {
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// RGB
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int32_t ComputeRGBStride(gfx::SurfaceFormat aFormat, int32_t aWidth);
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int32_t GetRGBStride(const RGBDescriptor& aDescriptor);
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uint32_t ComputeRGBBufferSize(gfx::IntSize aSize, gfx::SurfaceFormat aFormat);
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// YCbCr
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///This function is meant as a helper to know how much shared memory we need
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///to allocate in a shmem in order to place a shared YCbCr image blob of
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///given dimensions.
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uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
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int32_t aYStride,
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const gfx::IntSize& aCbCrSize,
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int32_t aCbCrStride);
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uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
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const gfx::IntSize& aCbCrSize);
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uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize);
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void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
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int32_t cbCrStride, int32_t cbCrHeight,
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uint32_t& outYOffset, uint32_t& outCbOffset, uint32_t& outCrOffset);
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gfx::SurfaceFormat FormatFromBufferDescriptor(const BufferDescriptor& aDescriptor);
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gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
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uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
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uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
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uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
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already_AddRefed<gfx::DataSourceSurface>
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DataSourceSurfaceFromYCbCrDescriptor(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
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} // ImageDataSerializer
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} // namespace layers
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} // namespace mozilla
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#endif
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