- display-option->int display-optionprocedure
display-option may be one of the following symbols:
- red-size
- green-size
- blue-size
- alpha-size
- red-shift
- green-shift
- blue-shift
- alpha-shift
- acc-red-size
- acc-green-size
- acc-blue-size
- acc-alpha-size
- stereo
- aux-buffers
- color-size
- depth-size
- stencil-size
- sample-buffers
- samples
- render-method
- float-color
- float-depth
- single-buffer
- swap-method
- compatible-display
- update-display-region
- vsync
- max-bitmap-size
- support-npot-bitmap
- can-draw-into-bitmap
- support-separate-alpha