text: /*
   *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  #ifndef WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_
  #define WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_
  
  #include "webrtc/modules/video_render/include/video_render_defines.h"
  
  #include <GLES2/gl2.h>
  #include <GLES2/gl2ext.h>
  
  namespace webrtc
  {
  
  class VideoRenderOpenGles20 {
   public:
    VideoRenderOpenGles20(int32_t id);
    ~VideoRenderOpenGles20();
  
    int32_t Setup(int32_t widht, int32_t height);
    int32_t Render(const VideoFrame& frameToRender);
    int32_t SetCoordinates(int32_t zOrder, const float left, const float top,
                           const float right, const float bottom);
  
   private:
    void printGLString(const char *name, GLenum s);
    void checkGlError(const char* op);
    GLuint loadShader(GLenum shaderType, const char* pSource);
    GLuint createProgram(const char* pVertexSource,
                         const char* pFragmentSource);
    void SetupTextures(const VideoFrame& frameToRender);
    void UpdateTextures(const VideoFrame& frameToRender);
  
    int32_t _id;
    GLuint _textureIds[3]; // Texture id of Y,U and V texture.
    GLuint _program;
    GLsizei _textureWidth;
    GLsizei _textureHeight;
  
    GLfloat _vertices[20];
    static const char g_indices[];
  
    static const char g_vertextShader[];
    static const char g_fragmentShader[];
  
  };
  
  }  // namespace webrtc
  
  #endif  // WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_ANDROID_VIDEO_RENDER_OPENGLES20_H_
  