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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
#define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
#include "content/common/content_export.h"
#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
namespace content {
// Implementation of GPU memory buffer based on shared memory.
class CONTENT_EXPORT GpuMemoryBufferImplSharedMemory
: public GpuMemoryBufferImpl {
public:
~GpuMemoryBufferImplSharedMemory() override;
static scoped_ptr<GpuMemoryBufferImplSharedMemory> Create(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback);
static gfx::GpuMemoryBufferHandle AllocateForChildProcess(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
base::ProcessHandle child_process);
static scoped_ptr<GpuMemoryBufferImplSharedMemory> CreateFromHandle(
const gfx::GpuMemoryBufferHandle& handle,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
const DestructionCallback& callback);
static bool IsUsageSupported(gfx::BufferUsage usage);
static bool IsConfigurationSupported(gfx::BufferFormat format,
gfx::BufferUsage usage);
static bool IsSizeValidForFormat(const gfx::Size& size,
gfx::BufferFormat format);
static base::Closure AllocateForTesting(const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
gfx::GpuMemoryBufferHandle* handle);
// Overridden from gfx::GpuMemoryBuffer:
bool Map() override;
void* memory(size_t plane) override;
void Unmap() override;
int stride(size_t plane) const override;
gfx::GpuMemoryBufferHandle GetHandle() const override;
private:
GpuMemoryBufferImplSharedMemory(gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
const DestructionCallback& callback,
scoped_ptr<base::SharedMemory> shared_memory,
size_t offset);
scoped_ptr<base::SharedMemory> shared_memory_;
size_t offset_;
DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplSharedMemory);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
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