The Tor Browser / file comparison
comparison: gfx/layers/ImageDataSerializer.h
gfx/layers/ImageDataSerializer.h
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- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:e8c25a14e766 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim: sw=2 ts=8 et : | |
| 3 */ | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #ifndef GFX_LAYERS_BLOBSURFACE_H | |
| 9 #define GFX_LAYERS_BLOBSURFACE_H | |
| 10 | |
| 11 #include <stdint.h> // for uint8_t, uint32_t | |
| 12 #include "mozilla/Attributes.h" // for MOZ_STACK_CLASS | |
| 13 #include "mozilla/RefPtr.h" // for TemporaryRef | |
| 14 #include "mozilla/gfx/Point.h" // for IntSize | |
| 15 #include "mozilla/gfx/Types.h" // for SurfaceFormat | |
| 16 | |
| 17 class gfxImageSurface; | |
| 18 | |
| 19 namespace mozilla { | |
| 20 namespace gfx { | |
| 21 class DataSourceSurface; | |
| 22 class DrawTarget; | |
| 23 } // namespace gfx | |
| 24 } // namespace mozilla | |
| 25 | |
| 26 namespace mozilla { | |
| 27 namespace layers { | |
| 28 | |
| 29 class ImageDataSerializerBase | |
| 30 { | |
| 31 public: | |
| 32 bool IsValid() const { return mIsValid; } | |
| 33 | |
| 34 uint8_t* GetData(); | |
| 35 uint32_t GetStride() const; | |
| 36 gfx::IntSize GetSize() const; | |
| 37 gfx::SurfaceFormat GetFormat() const; | |
| 38 TemporaryRef<gfx::DataSourceSurface> GetAsSurface(); | |
| 39 TemporaryRef<gfxImageSurface> GetAsThebesSurface(); | |
| 40 TemporaryRef<gfx::DrawTarget> GetAsDrawTarget(gfx::BackendType aBackend); | |
| 41 | |
| 42 static uint32_t ComputeMinBufferSize(gfx::IntSize aSize, | |
| 43 gfx::SurfaceFormat aFormat); | |
| 44 | |
| 45 protected: | |
| 46 | |
| 47 ImageDataSerializerBase(uint8_t* aData, size_t aDataSize) | |
| 48 : mData(aData) | |
| 49 , mDataSize(aDataSize) | |
| 50 , mIsValid(false) | |
| 51 {} | |
| 52 | |
| 53 void Validate(); | |
| 54 | |
| 55 uint8_t* mData; | |
| 56 size_t mDataSize; | |
| 57 bool mIsValid; | |
| 58 }; | |
| 59 | |
| 60 /** | |
| 61 * A facility to serialize an image into a buffer of memory. | |
| 62 * This is intended for use with the IPC code, in order to copy image data | |
| 63 * into shared memory. | |
| 64 * Note that there is a separate serializer class for YCbCr images | |
| 65 * (see YCbCrImageDataSerializer.h). | |
| 66 */ | |
| 67 class MOZ_STACK_CLASS ImageDataSerializer : public ImageDataSerializerBase | |
| 68 { | |
| 69 public: | |
| 70 ImageDataSerializer(uint8_t* aData, size_t aDataSize) | |
| 71 : ImageDataSerializerBase(aData, aDataSize) | |
| 72 { | |
| 73 // a serializer needs to be usable before correct buffer info has been written to it | |
| 74 mIsValid = !!mData; | |
| 75 } | |
| 76 void InitializeBufferInfo(gfx::IntSize aSize, | |
| 77 gfx::SurfaceFormat aFormat); | |
| 78 }; | |
| 79 | |
| 80 /** | |
| 81 * A facility to deserialize image data that has been serialized by an | |
| 82 * ImageDataSerializer. | |
| 83 */ | |
| 84 class MOZ_STACK_CLASS ImageDataDeserializer : public ImageDataSerializerBase | |
| 85 { | |
| 86 public: | |
| 87 ImageDataDeserializer(uint8_t* aData, size_t aDataSize) | |
| 88 : ImageDataSerializerBase(aData, aDataSize) | |
| 89 { | |
| 90 Validate(); | |
| 91 } | |
| 92 | |
| 93 }; | |
| 94 | |
| 95 } // namespace layers | |
| 96 } // namespace mozilla | |
| 97 | |
| 98 #endif |
