vlc opengl播放视频

initializeGL()：
glewInit()


paintGL():
glClearDepth(1.0);
glClearColor(0 / 255.0, 0 / 255.0, 0 / 255.0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

draw():
glClearDepth(1.0);
glClearColor(0 / 255.0, 0 / 255.0, 0 / 255.0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);


doExecute():
glEnable(GL_DEPTH_TEST);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthMask(GL_TRUE);
glDepthFunc(GL_LEQUAL);

glDisable(GL_BLEND);
//      glBlendFunc( GL_SRC_ALPHA , GL_ONE_MINUS_SRC_ALPHA );
glUseProgram(m_Program);

glUniform1i(m_TexLocation, 0);
glActiveTexture(GL_TEXTURE0);


if(m_useVideo)