gecko-dev/gfx/layers/ipc/ShadowLayerUtilsGralloc.h

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