Scan-out capable buffers (aka ui::NativePixmap) for Mus

components/mus/gles2/gpu_memory_buffer_impl.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 COMPONENTS_MUS_GLES2_GPU_MEMORY_BUFFER_IMPL_H_
+#define COMPONENTS_MUS_GLES2_GPU_MEMORY_BUFFER_IMPL_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "gpu/command_buffer/common/sync_token.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/ozone/public/native_pixmap.h"
+
+namespace mus {
+
+// Provides common implementation of a GPU memory buffer.
+class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
+ public:
+  ~GpuMemoryBufferImpl() override;
+
+  // Type-checking upcast routine. Returns an NULL on failure.
+  static GpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer);
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  gfx::Size GetSize() const override;
+  gfx::BufferFormat GetFormat() const override;
+  gfx::GpuMemoryBufferId GetId() const override;
+  ClientBuffer AsClientBuffer() override;
+
+  // Returns the type of this GpuMemoryBufferImpl.
+  virtual gfx::GpuMemoryBufferType GetBufferType() const = 0;
+
+  // Returns a ui::NativePixmap when one is available.
+  virtual scoped_refptr<ui::NativePixmap> GetNativePixmap();
+
+ protected:
+  GpuMemoryBufferImpl(gfx::GpuMemoryBufferId id,
+                      const gfx::Size& size,
+                      gfx::BufferFormat format);
+
+  const gfx::GpuMemoryBufferId id_;
+  const gfx::Size size_;
+  const gfx::BufferFormat format_;
+  bool mapped_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImpl);
+};
+
+}  // namespace mus
+
+#endif  // COMPONENTS_MUS_GLES2_GPU_MEMORY_BUFFER_IMPL_H_