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/Rect.h" // for IntRect 15 #include "mozilla/gfx/Types.h" // for SurfaceFormat 16 #include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor 17 18 namespace mozilla { 19 namespace gfx { 20 class DataSourceSurface; 21 class DrawTarget; 22 } // namespace gfx 23 } // namespace mozilla 24 25 namespace mozilla { 26 namespace layers { 27 28 namespace ImageDataSerializer { 29 30 // RGB 31 32 int32_t ComputeRGBStride(gfx::SurfaceFormat aFormat, int32_t aWidth); 33 34 int32_t GetRGBStride(const RGBDescriptor& aDescriptor); 35 36 uint32_t ComputeRGBBufferSize(gfx::IntSize aSize, gfx::SurfaceFormat aFormat); 37 38 // YCbCr 39 40 /// This function is meant as a helper to know how much shared memory we need 41 /// to allocate in a shmem in order to place a shared YCbCr image blob of 42 /// given dimensions. 43 uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride, 44 const gfx::IntSize& aCbCrSize, 45 int32_t aCbCrStride); 46 uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride, 47 const gfx::IntSize& aCbCrSize, 48 int32_t aCbCrStride, uint32_t aYOffset, 49 uint32_t aCbOffset, uint32_t aCrOffset); 50 uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize); 51 52 void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight, int32_t cbCrStride, 53 int32_t cbCrHeight, uint32_t& outYOffset, 54 uint32_t& outCbOffset, uint32_t& outCrOffset); 55 56 gfx::SurfaceFormat FormatFromBufferDescriptor( 57 const BufferDescriptor& aDescriptor); 58 59 gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor); 60 61 gfx::IntRect RectFromBufferDescriptor(const BufferDescriptor& aDescriptor); 62 63 Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor( 64 const BufferDescriptor& aDescriptor); 65 66 Maybe<int32_t> YStrideFromBufferDescriptor(const BufferDescriptor& aDescriptor); 67 68 Maybe<int32_t> CbCrStrideFromBufferDescriptor( 69 const BufferDescriptor& aDescriptor); 70 71 Maybe<gfx::YUVColorSpace> YUVColorSpaceFromBufferDescriptor( 72 const BufferDescriptor& aDescriptor); 73 74 Maybe<gfx::ColorDepth> ColorDepthFromBufferDescriptor( 75 const BufferDescriptor& aDescriptor); 76 77 Maybe<gfx::ColorRange> ColorRangeFromBufferDescriptor( 78 const BufferDescriptor& aDescriptor); 79 80 Maybe<StereoMode> StereoModeFromBufferDescriptor( 81 const BufferDescriptor& aDescriptor); 82 83 uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 84 85 uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 86 87 uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor); 88 89 already_AddRefed<gfx::DataSourceSurface> DataSourceSurfaceFromYCbCrDescriptor( 90 uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, 91 gfx::DataSourceSurface* aSurface = nullptr); 92 93 void ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer, 94 const YCbCrDescriptor& aDescriptor, 95 const gfx::SurfaceFormat& aDestFormat, 96 const gfx::IntSize& aDestSize, 97 unsigned char* aDestBuffer, 98 int32_t aStride); 99 100 } // namespace ImageDataSerializer 101 102 } // namespace layers 103 } // namespace mozilla 104 105 #endif 106