ContentShell rendering support on Android.

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_