1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef GFX_LAYERS_BLOBSURFACE_H 8 #define GFX_LAYERS_BLOBSURFACE_H 9 10 #include <stdint.h> // for uint8_t, uint32_t 11 #include "mozilla/Attributes.h" // for MOZ_STACK_CLASS 12 #include "mozilla/RefPtr.h" // for already_AddRefed 13 #include "mozilla/gfx/Point.h" // for IntSize 14 #include "mozilla/gfx/Types.h" // for SurfaceFormat 15 #include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor 16 17 namespace mozilla { 18 namespace gfx { 19 class DataSourceSurface; 20 class DrawTarget; 21 } // namespace gfx 22 } // namespace mozilla 23 24 namespace mozilla { 25 namespace layers { 26 27 namespace ImageDataSerializer { 28 29 // RGB 30 31 int32_t ComputeRGBStride(gfx::SurfaceFormat aFormat, int32_t aWidth); 32 33 int32_t GetRGBStride(const RGBDescriptor& aDescriptor); 34 35 uint32_t ComputeRGBBufferSize(gfx::IntSize aSize, gfx::SurfaceFormat aFormat); 36 37 // YCbCr 38 39 /// This function is meant as a helper to know how much shared memory we need 40 /// to allocate in a shmem in order to place a shared YCbCr image blob of 41 /// given dimensions. 42 uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride, 43 const gfx::IntSize& aCbCrSize, 44 int32_t aCbCrStride); 45 uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride, 46 const gfx::IntSize& aCbCrSize, 47 int32_t aCbCrStride, uint32_t aYOffset, 48 uint32_t aCbOffset, uint32_t aCrOffset); 49 uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize); 50 51 void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight, int32_t cbCrStride, 52 int32_t cbCrHeight, uint32_t& outYOffset, 53 uint32_t& outCbOffset, uint32_t& outCrOffset); 54 55 gfx::SurfaceFormat FormatFromBufferDescriptor( 56 const BufferDescriptor& aDescriptor); 57 58 gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor); 59 60 Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor( 61 const BufferDescriptor& aDescriptor); 62 63 Maybe<int32_t> YStrideFromBufferDescriptor(const BufferDescriptor& aDescriptor); 64 65 Maybe<int32_t> CbCrStrideFromBufferDescriptor( 66 const BufferDescriptor& aDescriptor); 67 68 Maybe<gfx::YUVColorSpace> YUVColorSpaceFromBufferDescriptor( 69 const BufferDescriptor& aDescriptor); 70 71 Maybe<gfx::ColorDepth> ColorDepthFromBufferDescriptor( 72 const BufferDescriptor& aDescriptor); 73 74 Maybe<gfx::ColorRange> ColorRangeFromBufferDescriptor( 75 const BufferDescriptor& aDescriptor); 76 77 Maybe<StereoMode> StereoModeFromBufferDescriptor( 78 const BufferDescriptor& aDescriptor); 79 80 uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 81 82 uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 83 84 uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 85 86 already_AddRefed<gfx::DataSourceSurface> DataSourceSurfaceFromYCbCrDescriptor( 87 uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, 88 gfx::DataSourceSurface* aSurface = nullptr); 89 90 void ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer, 91 const YCbCrDescriptor& aDescriptor, 92 const gfx::SurfaceFormat& aDestFormat, 93 const gfx::IntSize& aDestSize, 94 unsigned char* aDestBuffer, 95 int32_t aStride); 96 97 } // namespace ImageDataSerializer 98 99 } // namespace layers 100 } // namespace mozilla 101 102 #endif 103