зеркало из https://github.com/mozilla/gecko-dev.git
96 строки
2.7 KiB
C++
96 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_ShadowLayerUtilsGralloc_h
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#define mozilla_layers_ShadowLayerUtilsGralloc_h
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#include <unistd.h>
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#include <ui/GraphicBuffer.h>
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#include "base/process.h"
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#include "ipc/IPCMessageUtils.h"
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#define MOZ_HAVE_SURFACEDESCRIPTORGRALLOC
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#define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS
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namespace mozilla {
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namespace layers {
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class MaybeMagicGrallocBufferHandle;
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class SurfaceDescriptor;
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struct GrallocBufferRef {
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base::ProcessId mOwner;
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int64_t mKey;
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GrallocBufferRef()
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: mOwner(0)
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, mKey(-1)
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{
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}
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bool operator== (const GrallocBufferRef rhs) const{
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return mOwner == rhs.mOwner && mKey == rhs.mKey;
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}
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};
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/**
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* This class exists to share the underlying GraphicBuffer resources
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* from one thread context to another. This requires going through
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* slow paths in the kernel so can be somewhat expensive.
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*
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* This is not just platform-specific, but also
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* gralloc-implementation-specific.
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*/
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struct MagicGrallocBufferHandle {
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typedef android::GraphicBuffer GraphicBuffer;
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MagicGrallocBufferHandle() {}
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MagicGrallocBufferHandle(const android::sp<GraphicBuffer>& aGraphicBuffer, GrallocBufferRef ref);
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// Default copy ctor and operator= are OK
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bool operator==(const MagicGrallocBufferHandle& aOther) const {
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return mGraphicBuffer == aOther.mGraphicBuffer;
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}
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android::sp<GraphicBuffer> mGraphicBuffer;
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GrallocBufferRef mRef;
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};
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/**
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* Util function to find GraphicBuffer from SurfaceDescriptor, caller of this function should check origin
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* to make sure not corrupt others buffer
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*/
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android::sp<android::GraphicBuffer> GetGraphicBufferFrom(MaybeMagicGrallocBufferHandle aHandle);
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android::sp<android::GraphicBuffer> GetGraphicBufferFromDesc(SurfaceDescriptor aDesc);
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} // namespace layers
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} // namespace mozilla
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namespace IPC {
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template <>
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struct ParamTraits<mozilla::layers::MagicGrallocBufferHandle> {
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typedef mozilla::layers::MagicGrallocBufferHandle paramType;
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static void Write(Message* aMsg, const paramType& aParam);
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static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
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};
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template<>
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struct ParamTraits<mozilla::layers::GrallocBufferRef> {
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typedef mozilla::layers::GrallocBufferRef paramType;
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static void Write(Message* aMsg, const paramType& aParam);
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static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
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};
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} // namespace IPC
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#endif // mozilla_layers_ShadowLayerUtilsGralloc_h
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