From ab53e73ce77aa44458de55f62abf6273ac44d540 Mon Sep 17 00:00:00 2001
From: Richard Grenville <pyxlcy@gmail.com>
Date: Wed, 3 Apr 2013 10:51:37 +0800
Subject: Misc: Workaround for some missing definitions

- Add workarounds for missing GL_TEXTURE_RECTANGLE and PictOpDifference
  definitions in broken GL headers / old X Composite headers.
---
 common.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/common.h b/common.h
index a3435d430..2f5b831d1 100644
--- a/common.h
+++ b/common.h
@@ -76,6 +76,12 @@
 #include <X11/extensions/Xrandr.h>
 #include <X11/extensions/Xdbe.h>
 
+// Workarounds for missing definitions in very old versions of X headers,
+// thanks to consolers for reporting
+#ifndef PictOpDifference
+#define PictOpDifference 0x39
+#endif
+
 // libconfig
 #ifdef CONFIG_LIBCONFIG
 #include <libgen.h>
@@ -94,6 +100,13 @@
 #endif
 
 #include <GL/glx.h>
+
+// Workarounds for missing definitions in some broken GL drivers, thanks to
+// douglasp and consolers for reporting
+#ifndef GL_TEXTURE_RECTANGLE
+#define GL_TEXTURE_RECTANGLE 0x84F5
+#endif
+
 #endif
 
 // === Macros ===
-- 
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