Add GpuMemoryBuffer support for DXGI handles.

gpu/ipc/service/gpu_memory_buffer_factory_win.h

+// Copyright 2017 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_SERVICE_GPU_MEMORY_BUFFER_FACTORY_WIN_H_
+#define GPU_IPC_SERVICE_GPU_MEMORY_BUFFER_FACTORY_WIN_H_
+
+#include "gpu/command_buffer/service/image_factory.h"
+#include "gpu/ipc/service/gpu_memory_buffer_factory.h"
+#include "ui/gl/gl_image.h"
+
+namespace gpu {
+
+class GPU_EXPORT GpuMemoryBufferFactoryWin : public GpuMemoryBufferFactory,

[reveman, 2017/07/12 15:04:14]

s/GpuMemoryBufferFactoryWin/GpuMemoryBufferFactoryDXGI/ as this should be named
after the buffer type and not the platform to be consistent with other buffer
types. This is so it's not too confusing to have multiple buffer types per
platform

+                                             public ImageFactory {
+ public:
+  GpuMemoryBufferFactoryWin();
+  ~GpuMemoryBufferFactoryWin() override;
+
+  // Overridden from GpuMemoryBufferFactory:
+  gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
+      gfx::GpuMemoryBufferId id,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      gfx::BufferUsage usage,
+      int client_id,
+      SurfaceHandle surface_handle) override;
+  void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
+                              int client_id) override;
+  ImageFactory* AsImageFactory() override;
+
+  // Overridden from ImageFactory:
+  scoped_refptr<gl::GLImage> CreateImageForGpuMemoryBuffer(
+      const gfx::GpuMemoryBufferHandle& handle,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      unsigned internalformat,
+      int client_id,
+      SurfaceHandle surface_handle) override;
+  scoped_refptr<gl::GLImage> CreateAnonymousImage(
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      unsigned internalformat) override;
+  unsigned RequiredTextureType() override;
+  bool SupportsFormatRGB() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferFactoryWin);
+};
+
+}  // namespace gpu
+
+#endif  // GPU_IPC_SERVICE_GPU_MEMORY_BUFFER_FACTORY_WIN_H_