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glx: Require at least one True/DirectColor visual 

Mesa no longer supports rendering to anything less.  GLX 1.2 requires
that the server advertise at least one GLX visual.  GLX 1.3 and 1.4 are
more subtle: they require at least one fbconfig capable of window
rendering, and _also_ require that window-capable fbconfigs have a
non-zero value for the GLX_VISUAL_ID.  In either case we should refuse
to init GLX if there's not at least one GL-capable visual on at least
one screen.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Adam Jackson 2012-09-27 17:44:42 -04:00 committed by Keith Packard
parent 6d684f916b
commit db2e708f31
1 changed files with 21 additions and 0 deletions
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21
glx/glxext.c
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@ -316,6 +316,23 @@ GlxPushProvider(__GLXprovider * provider)
__glXProviderStack = provider;
}
static Bool
checkScreenVisuals(void)
{
int i, j;
for (i = 0; i < screenInfo.numScreens; i++) {
ScreenPtr screen = screenInfo.screens[i];
for (j = 0; j < screen->numVisuals; j++) {
if (screen->visuals[j].class == TrueColor ||
screen->visuals[j].class == DirectColor)
return True;
}
}
return False;
}
/*
** Initialize the GLX extension.
*/
@ -334,6 +351,10 @@ GlxExtensionInit(void)
*stack = &__glXDRISWRastProvider;
}
/* Mesa requires at least one True/DirectColor visual */
if (!checkScreenVisuals())
return;
__glXContextRes = CreateNewResourceType((DeleteType) ContextGone,
"GLXContext");
__glXDrawableRes = CreateNewResourceType((DeleteType) DrawableGone,