visual_info
This extension allows the user to request a particular X visual type to
be associated with a GLX visual.
- In addition, this extension provides a means to request a visual
with a transparent pixel and a mechanism to find the transparent
pixel value, if there is one.
- With this extension, a RGBA context must be associated with a
TrueColor or DirectColor visual and a color index context must
be associated with a PseudoColor or StaticColor visual.
- The
FBconfig
extension must be used to link RGBA rendering to
windows with PseudoColor visuals.