The Visual Info Extension

• You can request that a particular X visual type be associated with a GLX visual.

• You can query the X visual type underlying a GLX visual.

• You can request a visual with a transparent pixel.

• You can query whether a visual supports a transparent pixel value and query the value of the transparent pixel.

  Note that the notions of level and transparent pixels are orthogonal as both level 1 and level 0 visuals may or may not support transparent pixels.

Using the Visual Info Extension

Using Transparent Pixels