From 3391459590241609102b0eb66702d3dee75c381d Mon Sep 17 00:00:00 2001
From: Pascal Massimino <pascal.massimino@gmail.com>
Date: Thu, 3 Dec 2015 10:36:21 +0100
Subject: [PATCH] vwebp: work around the transparent background with GLUT bug

we setenv XLIB_SKIP_ARGB_VISUALS=1 before any GLUT call.

Change-Id: I4cff5b6c6155d5a074fa22fe56219f241558666e
---
 examples/vwebp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/examples/vwebp.c b/examples/vwebp.c
index bcc67da9..f09aec43 100644
--- a/examples/vwebp.c
+++ b/examples/vwebp.c
@@ -526,6 +526,12 @@ int main(int argc, char *argv[]) {
   WebPDemuxGetFrame(kParams.dmux, 0, curr);
   if (kParams.loop_count) ++kParams.loop_count;
 
+#if defined(__unix__) || defined(__CYGWIN__)
+  // Work around GLUT compositor bug.
+  // https://bugs.launchpad.net/ubuntu/+source/freeglut/+bug/369891
+  setenv("XLIB_SKIP_ARGB_VISUALS", "1", 1);
+#endif
+
   // Start display (and timer)
   glutInit(&argc, argv);
 #ifdef FREEGLUT