// 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_