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comparison: gfx/layers/ipc/ShadowLayerUtilsGralloc.h
gfx/layers/ipc/ShadowLayerUtilsGralloc.h
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| 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 mozilla_layers_ShadowLayerUtilsGralloc_h | |
| 9 #define mozilla_layers_ShadowLayerUtilsGralloc_h | |
| 10 | |
| 11 #include <unistd.h> | |
| 12 #include <ui/GraphicBuffer.h> | |
| 13 | |
| 14 #include "ipc/IPCMessageUtils.h" | |
| 15 #include "mozilla/layers/PGrallocBufferChild.h" | |
| 16 #include "mozilla/layers/PGrallocBufferParent.h" | |
| 17 | |
| 18 #define MOZ_HAVE_SURFACEDESCRIPTORGRALLOC | |
| 19 #define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS | |
| 20 | |
| 21 namespace mozilla { | |
| 22 namespace layers { | |
| 23 | |
| 24 class MaybeMagicGrallocBufferHandle; | |
| 25 class TextureHost; | |
| 26 | |
| 27 /** | |
| 28 * This class exists to share the underlying GraphicBuffer resources | |
| 29 * from one thread context to another. This requires going through | |
| 30 * slow paths in the kernel so can be somewhat expensive. | |
| 31 * | |
| 32 * This is not just platform-specific, but also | |
| 33 * gralloc-implementation-specific. | |
| 34 */ | |
| 35 struct MagicGrallocBufferHandle { | |
| 36 typedef android::GraphicBuffer GraphicBuffer; | |
| 37 | |
| 38 MagicGrallocBufferHandle() | |
| 39 { } | |
| 40 | |
| 41 MagicGrallocBufferHandle(const android::sp<GraphicBuffer>& aGraphicBuffer); | |
| 42 | |
| 43 // Default copy ctor and operator= are OK | |
| 44 | |
| 45 bool operator==(const MagicGrallocBufferHandle& aOther) const { | |
| 46 return mGraphicBuffer == aOther.mGraphicBuffer; | |
| 47 } | |
| 48 | |
| 49 android::sp<GraphicBuffer> mGraphicBuffer; | |
| 50 }; | |
| 51 | |
| 52 /** | |
| 53 * GrallocBufferActor is an "IPC wrapper" for an underlying | |
| 54 * GraphicBuffer (pmem region). It allows us to cheaply and | |
| 55 * conveniently share gralloc handles between processes. | |
| 56 */ | |
| 57 class GrallocBufferActor : public PGrallocBufferChild | |
| 58 , public PGrallocBufferParent | |
| 59 { | |
| 60 friend class ShadowLayerForwarder; | |
| 61 friend class LayerManagerComposite; | |
| 62 friend class ImageBridgeChild; | |
| 63 typedef android::GraphicBuffer GraphicBuffer; | |
| 64 | |
| 65 public: | |
| 66 virtual ~GrallocBufferActor(); | |
| 67 | |
| 68 static PGrallocBufferParent* | |
| 69 Create(const gfx::IntSize& aSize, | |
| 70 const uint32_t& aFormat, | |
| 71 const uint32_t& aUsage, | |
| 72 MaybeMagicGrallocBufferHandle* aOutHandle); | |
| 73 | |
| 74 static PGrallocBufferChild* | |
| 75 Create(); | |
| 76 | |
| 77 // used only for hacky fix in gecko 23 for bug 862324 | |
| 78 // see bug 865908 about fixing this. | |
| 79 void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE; | |
| 80 | |
| 81 void AddTextureHost(TextureHost* aTextureHost); | |
| 82 void RemoveTextureHost(); | |
| 83 | |
| 84 android::GraphicBuffer* GetGraphicBuffer(); | |
| 85 | |
| 86 void InitFromHandle(const MagicGrallocBufferHandle& aHandle); | |
| 87 | |
| 88 private: | |
| 89 GrallocBufferActor(); | |
| 90 | |
| 91 android::sp<GraphicBuffer> mGraphicBuffer; | |
| 92 | |
| 93 // This value stores the number of bytes allocated in this | |
| 94 // BufferActor. This will be used for the memory reporter. | |
| 95 size_t mAllocBytes; | |
| 96 | |
| 97 // Used only for hacky fix for bug 966446. | |
| 98 TextureHost* mTextureHost; | |
| 99 | |
| 100 friend class ISurfaceAllocator; | |
| 101 }; | |
| 102 | |
| 103 } // namespace layers | |
| 104 } // namespace mozilla | |
| 105 | |
| 106 namespace IPC { | |
| 107 | |
| 108 template <> | |
| 109 struct ParamTraits<mozilla::layers::MagicGrallocBufferHandle> { | |
| 110 typedef mozilla::layers::MagicGrallocBufferHandle paramType; | |
| 111 | |
| 112 static void Write(Message* aMsg, const paramType& aParam); | |
| 113 static bool Read(const Message* aMsg, void** aIter, paramType* aResult); | |
| 114 }; | |
| 115 | |
| 116 } // namespace IPC | |
| 117 | |
| 118 #endif // mozilla_layers_ShadowLayerUtilsGralloc_h |
