Vitaliy Margolen : x11drv: Fix one case of "glXChooseFBConfig returns NULL" problem.

[Alexandre Julliard]

Module: wine
Branch: refs/heads/master
Commit: c04cbbfeae627cc20b55972df12f5dcc437ab10e
URL:    http://source.winehq.org/git/?p=wine.git;a=commit;h=c04cbbfeae627cc20b55972d...

Author: Vitaliy Margolen <wine-patch(a)kievinfo.com>
Date:   Sat Mar  4 22:27:11 2006 -0700

x11drv: Fix one case of "glXChooseFBConfig returns NULL" problem.

Using alpha bits > 8 makes this function fail, while it should not.

---

 dlls/x11drv/opengl.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/x11drv/opengl.c b/dlls/x11drv/opengl.c
index eb58da9..3fc0231 100644
--- a/dlls/x11drv/opengl.c
+++ b/dlls/x11drv/opengl.c
@@ -226,7 +226,8 @@ int X11DRV_ChoosePixelFormat(X11DRV_PDEV
       ADD2(GLX_ALPHA_SIZE, 8);
     } else {
       ADD2(GLX_BUFFER_SIZE, ppfd->cColorBits);
-      TEST_AND_ADD2(ppfd->cAlphaBits, GLX_ALPHA_SIZE, ppfd->cAlphaBits);
+      /* Some broken apps try to ask for more than 8 bits of alpha */
+      TEST_AND_ADD2(ppfd->cAlphaBits, GLX_ALPHA_SIZE, min(ppfd->cAlphaBits,8));
     }
   }
   TEST_AND_ADD2(ppfd->cStencilBits, GLX_STENCIL_SIZE, ppfd->cStencilBits);