I have an OpenGL-based application executing on a Sun, but displaying on
a PC running Windows XP and an X server. The app requires a TrueColor
visual, so when it calls glXChooseVisual, it passes GLX_RGBA in the
attribute list. This works fine with another X server (Exceed), but when
using Cygwin/X, glXChooseVisual fails to return a visual.
Running xdpyinfo would seem to indicate that the server has *only*
TrueColor visuals (see the output below). And in fact if I remove
GLX_RGBA from the attribute list, glXChooseVisual does return one of
those visuals. If I ask for information about the visual with
glXGetConfig, it responds that color buffers store color indices
(GLX_RGBA is false), yet the application works correctly.
Anybody have a clue what is going on here?
Thanks,
Geoff
Output from xdpyinfo:
number of visuals: 4
default visual id: 0x22
visual:
visual id: 0x22
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x23
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x24
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
visual:
visual id: 0x25
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff0000, 0xff00, 0xff
significant bits in color specification: 8 bits
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