Enable SurfaceTexture based zero-copy texture uploading on Android platform

content/common/gpu/client/gpu_memory_buffer_impl_surface_texture.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_SURFACE_TEXTURE_H_
+#define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SURFACE_TEXTURE_H_
+
+#include "content/common/gpu/client/gpu_memory_buffer_impl.h"
+#include "ui/gl/android/surface_texture.h"
+
+namespace content {
+
+// Provides implementation of a GPU memory buffer based
+// on SurfaceTexture.
+class GpuMemoryBufferImplSurfaceTexture : public GpuMemoryBufferImpl {
+ public:
+  GpuMemoryBufferImplSurfaceTexture(gfx::Size size, unsigned internalformat);
+  virtual ~GpuMemoryBufferImplSurfaceTexture();
+
+  bool Initialize(gfx::GpuMemoryBufferHandle handle);
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  virtual uint32 GetStride() const OVERRIDE;
+  virtual void Map(AccessMode mode, void** vaddr) OVERRIDE;
+  virtual void Unmap() OVERRIDE;
+  virtual gfx::GpuMemoryBufferHandle GetHandle() const OVERRIDE;
+  void setSurfaceTexture(gfx::SurfaceTexture* surface_texture) {
+    surface_texture_ = surface_texture;
+  }
+  void setNativeWindow(ANativeWindow* window);
+
+ private:
+  unsigned int texture_id_;
+  ANativeWindow* native_window_;
+  unsigned int stride_;
+  bool stride_updated_;
+  gfx::SurfaceTexture* surface_texture_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplSurfaceTexture);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SURFACE_TEXTURE_H_