michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_layers_ShadowLayerUtilsGralloc_h
michael@0: #define mozilla_layers_ShadowLayerUtilsGralloc_h
michael@0: 
michael@0: #include <unistd.h>
michael@0: #include <ui/GraphicBuffer.h>
michael@0: 
michael@0: #include "ipc/IPCMessageUtils.h"
michael@0: #include "mozilla/layers/PGrallocBufferChild.h"
michael@0: #include "mozilla/layers/PGrallocBufferParent.h"
michael@0: 
michael@0: #define MOZ_HAVE_SURFACEDESCRIPTORGRALLOC
michael@0: #define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace layers {
michael@0: 
michael@0: class MaybeMagicGrallocBufferHandle;
michael@0: class TextureHost;
michael@0: 
michael@0: /**
michael@0:  * This class exists to share the underlying GraphicBuffer resources
michael@0:  * from one thread context to another.  This requires going through
michael@0:  * slow paths in the kernel so can be somewhat expensive.
michael@0:  *
michael@0:  * This is not just platform-specific, but also
michael@0:  * gralloc-implementation-specific.
michael@0:  */
michael@0: struct MagicGrallocBufferHandle {
michael@0:   typedef android::GraphicBuffer GraphicBuffer;
michael@0: 
michael@0:   MagicGrallocBufferHandle()
michael@0:   { }
michael@0: 
michael@0:   MagicGrallocBufferHandle(const android::sp<GraphicBuffer>& aGraphicBuffer);
michael@0: 
michael@0:   // Default copy ctor and operator= are OK
michael@0: 
michael@0:   bool operator==(const MagicGrallocBufferHandle& aOther) const {
michael@0:     return mGraphicBuffer == aOther.mGraphicBuffer;
michael@0:   }
michael@0: 
michael@0:   android::sp<GraphicBuffer> mGraphicBuffer;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * GrallocBufferActor is an "IPC wrapper" for an underlying
michael@0:  * GraphicBuffer (pmem region).  It allows us to cheaply and
michael@0:  * conveniently share gralloc handles between processes.
michael@0:  */
michael@0: class GrallocBufferActor : public PGrallocBufferChild
michael@0:                          , public PGrallocBufferParent
michael@0: {
michael@0:   friend class ShadowLayerForwarder;
michael@0:   friend class LayerManagerComposite;
michael@0:   friend class ImageBridgeChild;
michael@0:   typedef android::GraphicBuffer GraphicBuffer;
michael@0: 
michael@0: public:
michael@0:   virtual ~GrallocBufferActor();
michael@0: 
michael@0:   static PGrallocBufferParent*
michael@0:   Create(const gfx::IntSize& aSize,
michael@0:          const uint32_t& aFormat,
michael@0:          const uint32_t& aUsage,
michael@0:          MaybeMagicGrallocBufferHandle* aOutHandle);
michael@0: 
michael@0:   static PGrallocBufferChild*
michael@0:   Create();
michael@0: 
michael@0:   // used only for hacky fix in gecko 23 for bug 862324
michael@0:   // see bug 865908 about fixing this.
michael@0:   void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE;
michael@0: 
michael@0:   void AddTextureHost(TextureHost* aTextureHost);
michael@0:   void RemoveTextureHost();
michael@0: 
michael@0:   android::GraphicBuffer* GetGraphicBuffer();
michael@0: 
michael@0:   void InitFromHandle(const MagicGrallocBufferHandle& aHandle);
michael@0: 
michael@0: private:
michael@0:   GrallocBufferActor();
michael@0: 
michael@0:   android::sp<GraphicBuffer> mGraphicBuffer;
michael@0: 
michael@0:   // This value stores the number of bytes allocated in this
michael@0:   // BufferActor. This will be used for the memory reporter.
michael@0:   size_t mAllocBytes;
michael@0: 
michael@0:   // Used only for hacky fix for bug 966446.
michael@0:   TextureHost* mTextureHost;
michael@0: 
michael@0:   friend class ISurfaceAllocator;
michael@0: };
michael@0: 
michael@0: } // namespace layers
michael@0: } // namespace mozilla
michael@0: 
michael@0: namespace IPC {
michael@0: 
michael@0: template <>
michael@0: struct ParamTraits<mozilla::layers::MagicGrallocBufferHandle> {
michael@0:   typedef mozilla::layers::MagicGrallocBufferHandle paramType;
michael@0: 
michael@0:   static void Write(Message* aMsg, const paramType& aParam);
michael@0:   static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
michael@0: };
michael@0: 
michael@0: } // namespace IPC
michael@0: 
michael@0: #endif  // mozilla_layers_ShadowLayerUtilsGralloc_h