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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_IPC_COMMON_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
#define GPU_IPC_COMMON_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
#include <stddef.h>
#include <memory>
#include "gpu/ipc/common/gpu_ipc_common_export.h"
#include "gpu/ipc/common/gpu_memory_buffer_impl.h"
namespace gpu {
class GpuMemoryBufferSupport;
// Implementation of GPU memory buffer based on shared memory.
class GPU_IPC_COMMON_EXPORT GpuMemoryBufferImplSharedMemory
: public GpuMemoryBufferImpl {
public:
GpuMemoryBufferImplSharedMemory(const GpuMemoryBufferImplSharedMemory&) =
delete;
GpuMemoryBufferImplSharedMemory& operator=(
const GpuMemoryBufferImplSharedMemory&) = delete;
~GpuMemoryBufferImplSharedMemory() override;
static constexpr gfx::GpuMemoryBufferType kBufferType =
gfx::SHARED_MEMORY_BUFFER;
static std::unique_ptr<GpuMemoryBufferImplSharedMemory> CreateForTesting(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
DestructionCallback callback);
static gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage);
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::OnceClosure 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::GpuMemoryBufferType GetType() const override;
gfx::GpuMemoryBufferHandle CloneHandle() const override;
void OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd,
const base::trace_event::MemoryAllocatorDumpGuid& buffer_dump_guid,
uint64_t tracing_process_id,
int importance) const override;
// Returns the shared memory GUID associated with buffer.
base::UnguessableToken GetSharedMemoryGUID() const;
private:
friend class GpuMemoryBufferSupport;
static std::unique_ptr<GpuMemoryBufferImplSharedMemory> CreateFromHandle(
gfx::GpuMemoryBufferHandle handle,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
DestructionCallback callback);
GpuMemoryBufferImplSharedMemory(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
DestructionCallback callback,
base::UnsafeSharedMemoryRegion shared_memory_region,
base::WritableSharedMemoryMapping shared_memory_mapping,
size_t offset,
uint32_t stride);
base::UnsafeSharedMemoryRegion shared_memory_region_;
base::WritableSharedMemoryMapping shared_memory_mapping_;
size_t offset_;
uint32_t stride_;
};
} // namespace gpu
#endif // GPU_IPC_COMMON_GPU_MEMORY_BUFFER_IMPL_SHARED_MEMORY_H_
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