break;
case RenderingAttributes.ROP_OR_REVERSE:
gl.glLogicOp(GL.GL_OR_REVERSE);
break;
case RenderingAttributes.ROP_COPY_INVERTED:
gl.glLogicOp(GL.GL_COPY_INVERTED);
break;
case RenderingAttributes.ROP_OR_INVERTED:
gl.glLogicOp(GL.GL_OR_INVERTED);
break;
case RenderingAttributes.ROP_NAND: