code: public void startClipping(ClipArea area)
  	{
  		if (area.noClip())
  			return;
  
  		GL11.glPushAttrib(GL11.GL_SCISSOR_BIT);
  		GL11.glEnable(GL11.GL_SCISSOR_TEST);
  
  		int f = ignoreScale ? 1 : scaleFactor;
  		int x = area.x * f;
  		int y = Minecraft.getMinecraft().displayHeight - (area.y + area.height()) * f;
  		int w = area.width() * f;
  		int h = area.height() * f;;
  		GL11.glScissor(x, y, w, h);
  	}
docs: Starts clipping an area to prevent drawing outside of it.
  
  @param area the area