From a13331d59b535aa4a1ddad695420de5d6f814550 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 23 Jul 2004 15:47:04 +0000
Subject: added support for MESA_GLX_FORCE_ALPHA env var

---
 src/mesa/drivers/x11/fakeglx.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/mesa/drivers/x11')

diff --git a/src/mesa/drivers/x11/fakeglx.c b/src/mesa/drivers/x11/fakeglx.c
index 3a8c7929004..c380ba27dcc 100644
--- a/src/mesa/drivers/x11/fakeglx.c
+++ b/src/mesa/drivers/x11/fakeglx.c
@@ -282,6 +282,10 @@ save_glx_visual( Display *dpy, XVisualInfo *vinfo,
    else
       comparePointers = GL_FALSE;
 
+   /* Force the visual to have an alpha channel */
+   if (rgbFlag && _mesa_getenv("MESA_GLX_FORCE_ALPHA"))
+      alphaFlag = GL_TRUE;
+
    /* First check if a matching visual is already in the list */
    for (i=0; i<NumVisuals; i++) {
       XMesaVisual v = VisualTable[i];
-- 
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