Mine

-(void) drawRect: (NSRect) bounds
{
	U8 *pBuffer = NULL;
	U32 ulBufferSize = 0;
	U32 width = 300;
	U32 height = 225;
	
	if(!isInitialized)
	{
		// pBuffer could be anything here, but I don't care, just want to see some color
		pBuffer = (U8 *)malloc(300 * 255 * 3);
		
		for(int i = 0; i < 300 * 25; i++)
			pBuffer[i] = 55;
			
		glEnable(GL_TEXTURE_2D);

		glClearColor(0, 0, 0, 0);
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		
		glGenTextures(1, &texture[0]);
		glBindTexture(GL_TEXTURE_2D, texture[0]);
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);	// Linear Filtering
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);	// Linear Filtering
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 300, 225,
			0, GL_RGB8, GL_UNSIGNED_BYTE,  pBuffer);
		free(pBuffer);
		isInitialized = YES;
		
		[self drawQuad];
		glFlush();
	}

	if(m_pFrame)
	{
		m_pFrame->GetBuffer(&pBuffer, &ulBufferSize);
		width = m_pFrame->GetWidth();
		height = m_pFrame->GetHeight();

		for(int i = 0; i < 300 * 25; i++)
			pBuffer[i] = 55;

		glBindTexture(GL_TEXTURE_2D, texture[0]);
		glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 
			width, height, GL_RGB8,
			GL_UNSIGNED_BYTE, pBuffer);
		printf("Displaying frame %d\n", frameNum++);
		[self drawQuad];
	
		m_pFrame = NULL;
		glFlush();
	}
}