From 5b5d6b92181bb0f24c3f13c79afaf8aa9dc6667f Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Thu, 28 Jul 2005 13:46:07 +0000
Subject: [PATCH] detect Mesa DRI

---
 panda/src/glxdisplay/glxGraphicsStateGuardian.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/panda/src/glxdisplay/glxGraphicsStateGuardian.cxx b/panda/src/glxdisplay/glxGraphicsStateGuardian.cxx
index 408a0d30b4..c94aa9a2dd 100644
--- a/panda/src/glxdisplay/glxGraphicsStateGuardian.cxx
+++ b/panda/src/glxdisplay/glxGraphicsStateGuardian.cxx
@@ -122,7 +122,11 @@ reset() {
   FrameBufferProperties properties = get_properties();
   int frame_buffer_mode = properties.get_frame_buffer_mode();
 
-  if (_gl_renderer.find("Mesa") != string::npos) {
+  // If "Mesa" is present, assume software.  However, if "Mesa DRI" is
+  // found, it's actually a Mesa-based OpenGL layer running over a
+  // hardware driver.
+  if (_gl_renderer.find("Mesa") != string::npos &&
+      _gl_renderer.find("Mesa DRI") == string::npos) {
     // It's Mesa, therefore probably a software context.
     if (!software) {
       glxdisplay_cat.error()