gpu/ipc/host/gpu_memory_buffer_support.h

// Copyright 2016 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 GPU_IPC_HOST_GPU_MEMORY_BUFFER_SUPPORT_H_
#define GPU_IPC_HOST_GPU_MEMORY_BUFFER_SUPPORT_H_

#include "base/containers/hash_tables.h"
#include "base/hash.h"
#include "ui/gfx/buffer_types.h"

namespace gpu {

using GpuMemoryBufferConfigurationKey =
    std::pair<gfx::BufferFormat, gfx::BufferUsage>;
using GpuMemoryBufferConfigurationSet =
    base::hash_set<GpuMemoryBufferConfigurationKey>;

}  // namespace gpu

namespace BASE_HASH_NAMESPACE {

template <>
struct hash<gpu::GpuMemoryBufferConfigurationKey> {
  size_t operator()(const gpu::GpuMemoryBufferConfigurationKey& key) const {
    return base::HashInts(static_cast<int>(key.first),
                          static_cast<int>(key.second));
  }
};

}  // namespace BASE_HASH_NAMESPACE

namespace gpu {

bool AreNativeGpuMemoryBuffersEnabled();

// Returns the set of supported configurations.
GpuMemoryBufferConfigurationSet GetNativeGpuMemoryBufferConfigurations();

// Returns the OpenGL target to use for image textures.
uint32_t GetImageTextureTarget(gfx::BufferFormat format,
                               gfx::BufferUsage usage);

}  // namespace gpu

#endif  // GPU_IPC_HOST_GPU_MEMORY_BUFFER_SUPPORT_H_