Very basic Android browser-side compositing support.

content/shell/android/draw_context.h

-// Copyright (c) 2012 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_SHELL_ANDROID_DRAW_CONTEXT_H_
-#define CONTENT_SHELL_ANDROID_DRAW_CONTEXT_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/synchronization/lock.h"
-#include "ui/gfx/native_widget_types.h"
-
-#include <GLES2/gl2.h>
-
-namespace content {
-class GraphicsContext;
-
-// Helper class for drawing content textures to the UI window surface.
-class DrawContext {
- public:
-  DrawContext(ANativeWindow* window);
-  ~DrawContext();
-
-  // Draws the given texture to the UI and returns a
-  // SyncPoint identifier.
-  uint32 Draw(int texture);
-
-  void Reshape(int width, int height);
-
- private:
-  // The shader program.
-  int program_;
-  int vertex_shader_;
-  int fragment_shader_;
-
-  // Shader uniform locations.
-  int texture_uniform_;
-
-  // The vertex attribute array used to draw a simple quad.
-  unsigned int vertex_buffer_;
-
-  // The graphics context used for drawing.
-  scoped_ptr<content::GraphicsContext> context_;
-
-  DISALLOW_COPY_AND_ASSIGN(DrawContext);
-};
-
-}  // namespace content
-
-#endif // CONTENT_SHELL_ANDROID_DRAW_CONTEXT_H_