opengl简单例子画rgb565数据

openglview

initWithCoder

    NSOpenGLContext *glcontext = [self openGLContext];
    [glcontext makeCurrentContext];

drawRect

 glClear(GL_COLOR_BUFFER_BIT);    
    glLoadIdentity();
	glPushMatrix ();
	// x,y(1->-1)
	glPixelZoom(1.0, -1.0);
	//set draw pos
	glRasterPos2i( -1.0, 1.0);
	[dataCondition  lock];
    glDrawPixels(size.width,size.height,GL_RGB,GL_UNSIGNED_SHORT_5_6_5,pData);
    [dataCondition unlock];
    //Signal that drawing is done - causes a buffer swap
    [[self openGLContext] flushBuffer];