content: Move IOSurface backed GpuMemoryBuffer allocation to GPU process.

content/common/gpu/gpu_memory_buffer_factory_io_surface.h

+// 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_GPU_MEMORY_BUFFER_FACTORY_IO_SURFACE_H_
+#define CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_IO_SURFACE_H_
+
+#include <IOSurface/IOSurfaceAPI.h>
+
+#include "base/containers/hash_tables.h"
+#include "base/mac/scoped_cftyperef.h"
+#include "base/memory/ref_counted.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace gfx {
+class GLImage;
+}
+
+namespace content {
+
+class GpuMemoryBufferFactoryIOSurface {
+ public:
+  GpuMemoryBufferFactoryIOSurface();
+  ~GpuMemoryBufferFactoryIOSurface();
+
+  // Creates a IOSurface backed GPU memory buffer with |size| and
+  // |internalformat|. A valid handle is returned on success.
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
+      const gfx::GpuMemoryBufferId& id,
+      const gfx::Size& size,
+      unsigned internalformat);
+
+  // Destroy a previously created GPU memory buffer.
+  void DestroyGpuMemoryBuffer(const gfx::GpuMemoryBufferId& id);
+
+  // Creates a GLImage instance for a GPU memory buffer.
+  scoped_refptr<gfx::GLImage> CreateImageForGpuMemoryBuffer(
+      const gfx::GpuMemoryBufferId& id,
+      const gfx::Size& size,
+      unsigned internalformat);
+
+ private:
+  typedef std::pair<int, int> IOSurfaceMapKey;
+  typedef base::hash_map<IOSurfaceMapKey, base::ScopedCFTypeRef<IOSurfaceRef>>
+      IOSurfaceMap;
+  IOSurfaceMap io_surfaces_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_IO_SURFACE_H_