NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

content/common/gpu/client/gpu_memory_buffer_impl_ozone_gbm_intel.h

+// Copyright 2015 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_GBM_INTEL_H_
+#define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_GBM_INTEL_H_
+
+extern "C" {
+#include <libdrm/intel_bufmgr.h>
+}
+
+#include "content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h"
+
+namespace content {
+
+// Implementation of GPU memory buffer based on Ozone GBM libdrm_intel.so.
+class GpuMemoryBufferImplOzoneGbmIntel

[reveman, 2015/04/13 00:46:13]

It should either be implemented behind OzoneNativeBuffer or as a different type
of GpuMemoryBuffer that is not limited to ozone. Is this ozone specific or can
it be used with a standard linux build of chromium?

[dshwang, 2015/04/14 13:15:55]

behind OzoneNativeBuffer. It's ozone specific because it require Ozone GBM.

+    : public GpuMemoryBufferImplOzoneNativeBuffer {
+ public:
+  static scoped_ptr<GpuMemoryBufferImpl> CreateFromHandle(
+      const gfx::GpuMemoryBufferHandle& handle,
+      const gfx::Size& size,
+      Format format,
+      const DestructionCallback& callback);
+  ~GpuMemoryBufferImplOzoneGbmIntel() override;
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  bool Map(void** data) override;
+  void Unmap() override;
+  void GetStride(uint32* stride) const override;
+  gfx::GpuMemoryBufferHandle GetHandle() const override;
+
+ private:
+  GpuMemoryBufferImplOzoneGbmIntel(gfx::GpuMemoryBufferId id,
+                                   const gfx::Size& size,
+                                   Format format,
+                                   const DestructionCallback& callback);
+
+  bool Initialize(const gfx::GpuMemoryBufferHandle& handle);
+
+  drm_intel_bo* buffer_;
+  base::ScopedFD prime_fd_;
+  uint32 stride_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplOzoneGbmIntel);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_OZONE_GBM_INTEL_H_