From 1013e4650473ef0aceac7f3cd571b982ff249250 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 12 Jun 2002 00:52:50 +0000
Subject: Moved big/little endian code to glheader.h. Define either
 MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN.

---
 src/mesa/main/glheader.h | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 'src/mesa/main/glheader.h')

diff --git a/src/mesa/main/glheader.h b/src/mesa/main/glheader.h
index 9f9f3edea9..3a66f618a2 100644
--- a/src/mesa/main/glheader.h
+++ b/src/mesa/main/glheader.h
@@ -1,4 +1,4 @@
-/* $Id: glheader.h,v 1.25 2002/03/23 01:49:58 brianp Exp $ */
+/* $Id: glheader.h,v 1.26 2002/06/12 00:52:50 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -162,6 +162,27 @@ typedef struct tagPIXELFORMATDESCRIPTOR PIXELFORMATDESCRIPTOR, *PPIXELFORMATDESC
 #endif
 
 
+/*
+ * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN.
+ * Do not use them unless absolutely necessary!
+ * Try to use a runtime test instead.
+ * For now, only used by some DRI hardware drivers for color/texel packing.
+ */
+#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
+#if defined(__linux__)
+#include <byteswap.h>
+#define CPU_TO_LE32( x )	bswap_32( x )
+#else /*__linux__*/
+#define CPU_TO_LE32( x )	( x )  /* fix me for non-Linux big-endian! */
+#endif /*__linux__*/
+#define MESA_BIG_ENDIAN 1
+#else
+#define CPU_TO_LE32( x )	( x )
+#define MESA_LITTLE_ENDIAN 1
+#endif
+#define LE32_TO_CPU( x )	CPU_TO_LE32( x )
+
+
 /* This is a macro on IRIX */
 #ifdef _P
 #undef _P
-- 
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