Moved big/little endian code to glheader.h.

Define either MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN.

4 files changed, 48 insertions, 24 deletions

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
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h
index 294c928e35..038518d90a 100644
--- a/src/mesa/main/macros.h
+++ b/src/mesa/main/macros.h
@@ -1,4 +1,4 @@
-/* $Id: macros.h,v 1.27 2002/06/05 16:48:54 brianp Exp $ */
+/* $Id: macros.h,v 1.28 2002/06/12 00:52:50 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -454,20 +454,8 @@ do {						\
 
 
 
-/* Byte swapping
- */
-
-#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
-#include <byteswap.h>
-#define CPU_TO_LE32( x )	bswap_32( x )
-#else
-#define CPU_TO_LE32( x )	( x )
-#endif
-
-#define LE32_TO_CPU( x )	CPU_TO_LE32( x )
-
-
 /* Generic color packing macros
+ * XXX We may move these into texutil.h at some point.
  */
 
 #define PACK_COLOR_8888( a, b, c, d )					\
@@ -493,7 +481,7 @@ do {						\
    (((a) & 0xe0) | (((b) & 0xe0) >> 3) | (((c) & 0xc0) >> 6))
 
 
-#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
+#ifdef MESA_BIG_ENDIAN
 
 #define PACK_COLOR_8888_LE( a, b, c, d )	PACK_COLOR_8888( d, c, b, a )
 
diff --git a/src/mesa/main/texformat.h b/src/mesa/main/texformat.h
index 1360c9ee1c..a8c5b52552 100644
--- a/src/mesa/main/texformat.h
+++ b/src/mesa/main/texformat.h
@@ -1,10 +1,10 @@
-/* $Id: texformat.h,v 1.7 2001/06/15 14:18:46 brianp Exp $ */
+/* $Id: texformat.h,v 1.8 2002/06/12 00:52:50 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
- * Version:  3.5
+ * Version:  4.1
  *
- * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -43,7 +43,7 @@ enum _format {
     * most useful for x86-based PC graphics card drivers.
     *
     * NOTE: In the default case, some of these formats will be
-    * duplicates of the default formats listed above.  However, these
+    * duplicates of the generic formats listed below.  However, these
     * formats guarantee their internal component sizes, while GLchan may
     * vary betwen GLubyte, GLushort and GLfloat.
     */
@@ -62,6 +62,21 @@ enum _format {
    MESA_FORMAT_I8,		/*                               IIII IIII */
    MESA_FORMAT_CI8,		/*                               CCCC CCCC */
 
+#if 0
+   /* upcoming little-endian formats: */
+
+				/* msb <------ TEXEL BITS -----------> lsb */
+				/* ---- ---- ---- ---- ---- ---- ---- ---- */
+   MESA_FORMAT_ABGR8888,	/* AAAA AAAA BBBB BBBB GGGG GGGG RRRR RRRR */
+   MESA_FORMAT_BGRA8888,	/* BBBB BBBB GGGG GGGG RRRR RRRR AAAA AAAA */
+   MESA_FORMAT_BGR888,		/*           BBBB BBBB GGGG GGGG RRRR RRRR */
+   MESA_FORMAT_BGR565,		/*                     BBBB BGGG GGGR RRRR */
+   MESA_FORMAT_BGRA4444,	/*                     BBBB GGGG RRRR AAAA */
+   MESA_FORMAT_BGRA5551,	/*                     BBBB BGGG GGRR RRRA */
+   MESA_FORMAT_LA88,		/*                     LLLL LLLL AAAA AAAA */
+   MESA_FORMAT_BGR233,		/*                               BBGG GRRR */
+#endif
+
    /* Generic GLchan-based formats.  These are the default formats used
     * by the software rasterizer and, unless the driver overrides the
     * texture image functions, incoming images will be converted to one
@@ -70,7 +85,7 @@ enum _format {
     *
     * NOTE: Because these are based on the GLchan datatype, one cannot
     * assume 8 bits per channel with these formats.  If you require
-    * GLubyte per channel, use one of the hardware formats below.
+    * GLubyte per channel, use one of the hardware formats above.
     */
    MESA_FORMAT_RGBA,
    MESA_FORMAT_RGB,
diff --git a/src/mesa/main/texutil.c b/src/mesa/main/texutil.c
index 47d320cf07..97e9c4561b 100644
--- a/src/mesa/main/texutil.c
+++ b/src/mesa/main/texutil.c
@@ -1,4 +1,4 @@
-/* $Id: texutil.c,v 1.29 2002/06/05 16:48:54 brianp Exp $ */
+/* $Id: texutil.c,v 1.30 2002/06/12 00:53:24 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -44,7 +44,7 @@
 #define DEBUG_TEXUTIL 0
 
 
-#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
+#ifdef MESA_BIG_ENDIAN
 #define APPEND16( a, b )	( (a) << 16 | (b) )
 #else
 #define APPEND16( a, b )	( (a) | (b) << 16 )
@@ -417,7 +417,7 @@ CONVERT_ARGB4444( texsubimage3d )
 #include "texutil_tmp.h"
 
 
-#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
+#ifdef MESA_BIG_ENDIAN
 
 #define CONVERT_TEXEL( dst, src )					\
 	{ const GLushort s = *(GLushort *)src;				\