1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/ipc/ShadowLayerUtilsGralloc.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,118 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#ifndef mozilla_layers_ShadowLayerUtilsGralloc_h
1.12 +#define mozilla_layers_ShadowLayerUtilsGralloc_h
1.13 +
1.14 +#include <unistd.h>
1.15 +#include <ui/GraphicBuffer.h>
1.16 +
1.17 +#include "ipc/IPCMessageUtils.h"
1.18 +#include "mozilla/layers/PGrallocBufferChild.h"
1.19 +#include "mozilla/layers/PGrallocBufferParent.h"
1.20 +
1.21 +#define MOZ_HAVE_SURFACEDESCRIPTORGRALLOC
1.22 +#define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS
1.23 +
1.24 +namespace mozilla {
1.25 +namespace layers {
1.26 +
1.27 +class MaybeMagicGrallocBufferHandle;
1.28 +class TextureHost;
1.29 +
1.30 +/**
1.31 + * This class exists to share the underlying GraphicBuffer resources
1.32 + * from one thread context to another. This requires going through
1.33 + * slow paths in the kernel so can be somewhat expensive.
1.34 + *
1.35 + * This is not just platform-specific, but also
1.36 + * gralloc-implementation-specific.
1.37 + */
1.38 +struct MagicGrallocBufferHandle {
1.39 + typedef android::GraphicBuffer GraphicBuffer;
1.40 +
1.41 + MagicGrallocBufferHandle()
1.42 + { }
1.43 +
1.44 + MagicGrallocBufferHandle(const android::sp<GraphicBuffer>& aGraphicBuffer);
1.45 +
1.46 + // Default copy ctor and operator= are OK
1.47 +
1.48 + bool operator==(const MagicGrallocBufferHandle& aOther) const {
1.49 + return mGraphicBuffer == aOther.mGraphicBuffer;
1.50 + }
1.51 +
1.52 + android::sp<GraphicBuffer> mGraphicBuffer;
1.53 +};
1.54 +
1.55 +/**
1.56 + * GrallocBufferActor is an "IPC wrapper" for an underlying
1.57 + * GraphicBuffer (pmem region). It allows us to cheaply and
1.58 + * conveniently share gralloc handles between processes.
1.59 + */
1.60 +class GrallocBufferActor : public PGrallocBufferChild
1.61 + , public PGrallocBufferParent
1.62 +{
1.63 + friend class ShadowLayerForwarder;
1.64 + friend class LayerManagerComposite;
1.65 + friend class ImageBridgeChild;
1.66 + typedef android::GraphicBuffer GraphicBuffer;
1.67 +
1.68 +public:
1.69 + virtual ~GrallocBufferActor();
1.70 +
1.71 + static PGrallocBufferParent*
1.72 + Create(const gfx::IntSize& aSize,
1.73 + const uint32_t& aFormat,
1.74 + const uint32_t& aUsage,
1.75 + MaybeMagicGrallocBufferHandle* aOutHandle);
1.76 +
1.77 + static PGrallocBufferChild*
1.78 + Create();
1.79 +
1.80 + // used only for hacky fix in gecko 23 for bug 862324
1.81 + // see bug 865908 about fixing this.
1.82 + void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE;
1.83 +
1.84 + void AddTextureHost(TextureHost* aTextureHost);
1.85 + void RemoveTextureHost();
1.86 +
1.87 + android::GraphicBuffer* GetGraphicBuffer();
1.88 +
1.89 + void InitFromHandle(const MagicGrallocBufferHandle& aHandle);
1.90 +
1.91 +private:
1.92 + GrallocBufferActor();
1.93 +
1.94 + android::sp<GraphicBuffer> mGraphicBuffer;
1.95 +
1.96 + // This value stores the number of bytes allocated in this
1.97 + // BufferActor. This will be used for the memory reporter.
1.98 + size_t mAllocBytes;
1.99 +
1.100 + // Used only for hacky fix for bug 966446.
1.101 + TextureHost* mTextureHost;
1.102 +
1.103 + friend class ISurfaceAllocator;
1.104 +};
1.105 +
1.106 +} // namespace layers
1.107 +} // namespace mozilla
1.108 +
1.109 +namespace IPC {
1.110 +
1.111 +template <>
1.112 +struct ParamTraits<mozilla::layers::MagicGrallocBufferHandle> {
1.113 + typedef mozilla::layers::MagicGrallocBufferHandle paramType;
1.114 +
1.115 + static void Write(Message* aMsg, const paramType& aParam);
1.116 + static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
1.117 +};
1.118 +
1.119 +} // namespace IPC
1.120 +
1.121 +#endif // mozilla_layers_ShadowLayerUtilsGralloc_h
