+ *attrib++ = GLX_RGBA;
+ *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
+ *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
+ *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
+ *attrib++ = GLX_DOUBLEBUFFER;
+ *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
+ // if stencil is enabled, ask for alpha too
+ if (stencil)