ozone: Implement zero/one-copy texture for Ozone GBM.

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.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_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_BUFFER_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_BUFFER_H_
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
+#include "ui/ozone/public/native_pixmap_manager.h"
 
 namespace content {
 
 // Implementation of GPU memory buffer based on Ozone native buffers.
 class GpuMemoryBufferImplOzoneNativeBuffer : public GpuMemoryBufferImpl {

[reveman, 2015/06/25 14:07:51]

There's now both OzoneNativeBuffer and NativePixmap and they both refer to the
same thing, afaict. Can we just use one name instead?
GpuMemoryBufferFactoryOzoneNativeBuffer, GpuMemoryBufferImplOzoneNativeBuffer,
OzoneNativeBufferManager, etc.

[dshwang, 2015/06/25 14:52:13]

I think GpuMemoryBufferFactoryOzoneNativeBuffer and
GpuMemoryBufferImplOzoneNativeBuffer should be renamed to
GpuMemoryBufferFactoryOzone and GpuMemoryBufferImplOzone. Those are just ozone
implementation of GpuMemoryBufferFactory and GpuMemoryBufferImpl.
OzoneNativeBuffer term is redundant.
After that, we have only NativePixmap term, which is ozone term for native
buffer like SurfaceTexture and IOSurface.
WDYT? If you are ok, I'll submit prerequisite renaming patch in another CL

  public:
   static scoped_ptr<GpuMemoryBufferImpl> CreateFromHandle(
+      ui::NativePixmapManager* manager,
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       Format format,
       Usage usage,
       const DestructionCallback& callback);
 
+  ~GpuMemoryBufferImplOzoneNativeBuffer() override;
+
   // Overridden from gfx::GpuMemoryBuffer:
   bool Map(void** data) override;
   void Unmap() override;
   void GetStride(int* stride) const override;
   gfx::GpuMemoryBufferHandle GetHandle() const override;
 
  private:
   GpuMemoryBufferImplOzoneNativeBuffer(gfx::GpuMemoryBufferId id,
                                        const gfx::Size& size,
                                        Format format,
+                                       Usage usage,
                                        const DestructionCallback& callback);
-  ~GpuMemoryBufferImplOzoneNativeBuffer() override;
+
+  bool Initialize(ui::NativePixmapManager* manager,
+                  const gfx::GpuMemoryBufferHandle& handle);
+
+  scoped_refptr<ui::NativePixmap> pixmap_;
+  Usage usage_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplOzoneNativeBuffer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_NATIVE_BUFFER_H_