/**
 * \file glheader.h
 * Top-most include file.
 *
 * This is the top-most include file of the Mesa sources.
 * It includes gl.h and all system headers which are needed.
 * Other Mesa source files should \e not directly include any system
 * headers.  This allows Mesa to be integrated into XFree86 and
 * allows system-dependent hacks/workarounds to be collected in one place.
 *
 * \note Actually, a lot of system-dependent stuff is now in imports.[ch].
 *
 * If you touch this file, everything gets recompiled!
 *
 * This file should be included before any other header in the .c files.
 *
 * Put compiler/OS/assembly pragmas and macros here to avoid
 * cluttering other source files.
 */

/*
 * Mesa 3-D graphics library
 * Version:  6.3
 *
 * Copyright (C) 1999-2005  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"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


#ifndef GLHEADER_H
#define GLHEADER_H


#if defined(XFree86LOADER) && defined(IN_MODULE)
#include "xf86_ansic.h"
#else
#include <assert.h>
#include <ctype.h>
/* If we can use Compaq's Fast Math Library on Alpha */
#if defined(__alpha__) && defined(CCPML)
#include <cpml.h>
#else
#include <math.h>
#endif
#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if defined(__linux__) && defined(__i386__)
#include <fpu_control.h>
#endif
#endif
#include <float.h>
#include <stdarg.h>


/* Get typedefs for uintptr_t and friends */
#if defined(_WIN32) && !defined(__MINGW32__)
#include <BaseTsd.h>
#if _MSC_VER == 1200
typedef UINT_PTR uintptr_t;
#endif 
#if defined(__MINGW32__)
#include <stdint.h>
#endif
#else
#include <inttypes.h>
#endif

#if defined(_WIN32) && !defined(__WIN32__) && !defined(__CYGWIN__) && !defined(BUILD_FOR_SNAP)
#  define __WIN32__
#  define finite _finite
#endif

#if defined(__WATCOMC__)
#  define finite _finite
#  pragma disable_message(201) /* Disable unreachable code warnings */
#endif


#if !defined(OPENSTEP) && (defined(__WIN32__) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP)
#  if !defined(__GNUC__) /* mingw environment */
#    pragma warning( disable : 4068 ) /* unknown pragma */
#    pragma warning( disable : 4710 ) /* function 'foo' not inlined */
#    pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
#    pragma warning( disable : 4127 ) /* conditional expression is constant */
#    if defined(MESA_MINWARN)
#      pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
#      pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
#      pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
#      pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
#      pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
#    endif
#  endif
#  if (defined(_MSC_VER) || defined(__MINGW32__)) && defined(BUILD_GL32) /* tag specify we're building mesa as a DLL */
#    define WGLAPI __declspec(dllexport)
#  elif (defined(_MSC_VER) || defined(__MINGW32__)) && defined(_DLL) /* tag specifying we're building for DLL runtime support */
#    define WGLAPI __declspec(dllimport)
#  else /* for use with static link lib build of Win32 edition only */
#    define WGLAPI __declspec(dllimport)
#  endif /* _STATIC_MESA support */
#endif /* WIN32 / CYGWIN bracket */


#ifndef __MINGW32__
/* XXX why is this here?
 * It should probaby be somewhere in src/mesa/drivers/windows/
 */
#if defined(_WIN32) && !defined(_WINGDI_) && !defined(_WINGDI_H) && !defined(_GNU_H_WINDOWS32_DEFINES) && !defined(OPENSTEP) && !defined(BUILD_FOR_SNAP) 
#	define WGL_FONT_LINES      0
#	define WGL_FONT_POLYGONS   1
#ifndef _GNU_H_WINDOWS32_FUNCTIONS
#	ifdef UNICODE
#		define wglUseFontBitmaps  wglUseFontBitmapsW
#		define wglUseFontOutlines  wglUseFontOutlinesW
#	else
#		define wglUseFontBitmaps  wglUseFontBitmapsA
#		define wglUseFontOutlines  wglUseFontOutlinesA
#	endif /* !UNICODE */
#endif /* _GNU_H_WINDOWS32_FUNCTIONS */
typedef struct tagLAYERPLANEDESCRIPTOR LAYERPLANEDESCRIPTOR, *PLAYERPLANEDESCRIPTOR, *LPLAYERPLANEDESCRIPTOR;
typedef struct _GLYPHMETRICSFLOAT GLYPHMETRICSFLOAT, *PGLYPHMETRICSFLOAT, *LPGLYPHMETRICSFLOAT;
typedef struct tagPIXELFORMATDESCRIPTOR PIXELFORMATDESCRIPTOR, *PPIXELFORMATDESCRIPTOR, *LPPIXELFORMATDESCRIPTOR;
#if !defined(GLX_USE_MESA)
#include <GL/mesa_wgl.h>
#endif
#endif
#endif /* !__MINGW32__ */


/*
 * 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 )


#define GL_GLEXT_PROTOTYPES
#include "GL/gl.h"
#include "GL/glext.h"


#if !defined(CAPI) && defined(WIN32) && !defined(BUILD_FOR_SNAP)
#define CAPI _cdecl
#endif
#include <GL/internal/glcore.h>


/* This is a macro on IRIX */
#ifdef _P
#undef _P
#endif


/* Turn off macro checking systems used by other libraries */
#ifdef CHECK
#undef CHECK
#endif


/* Create a macro so that asm functions can be linked into compilers other
 * than GNU C
 */
#ifndef _ASMAPI
#if defined(WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/
#define _ASMAPI __cdecl
#else
#define _ASMAPI
#endif
#ifdef	PTR_DECL_IN_FRONT
#define	_ASMAPIP * _ASMAPI
#else
#define	_ASMAPIP _ASMAPI *
#endif
#endif

#ifdef USE_X86_ASM
#define _NORMAPI _ASMAPI
#define _NORMAPIP _ASMAPIP
#else
#define _NORMAPI
#define _NORMAPIP *
#endif


/* Function inlining */
#if defined(__GNUC__)
#  define INLINE __inline__
#elif defined(__MSC__)
#  define INLINE __inline
#elif defined(_MSC_VER)
#  define INLINE __inline
#elif defined(__ICL)
#  define INLINE __inline
#elif defined(__INTEL_COMPILER)
#  define INLINE inline
#elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
#  define INLINE __inline
#else
#  define INLINE
#endif


/* If we build the library with gcc's -fvisibility=hidden flag, we'll
 * use the PUBLIC macro to mark functions that are to be exported.
 *
 * We also need to define a USED attribute, so the optimizer doesn't 
 * inline a static function that we later use in an alias. - ajax
 */
#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 303
#  define PUBLIC __attribute__((visibility("default")))
#  define USED __attribute__((used))
#else
#  define PUBLIC
#  define USED
#endif


/* Some compilers don't like some of Mesa's const usage */
#ifdef NO_CONST
#  define CONST
#else
#  define CONST const
#endif


#if defined(BUILD_FOR_SNAP) && defined(CHECKED)
#  define ASSERT(X)   _CHECK(X) 
#elif defined(DEBUG)
#  define ASSERT(X)   assert(X)
#else
#  define ASSERT(X)
#endif


#if !defined __GNUC__ || __GNUC__ < 3
#  define __builtin_expect(x, y) x
#endif

/* Windows does not have the ffs() function */
#if defined(_WIN32)
static int INLINE
ffs(register int value)
{
    register int bit = 0;
    if (value != 0)
    {
        if ((value & 0xffff) == 0)
        {
            bit += 16;
            value >>= 16;
        }
        if ((value & 0xff) == 0)
        {
            bit += 8;
            value >>= 8;
        }
        if ((value & 0xf) == 0)
        {
            bit += 4;
            value >>= 4;
        }
        while ((value & 1) == 0)
        {
            bit++;
            value >>= 1;
        }
    }
    return bit;
}
#endif


/* The __FUNCTION__ gcc variable is generally only used for debugging.
 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
 * Don't define it if using a newer Windows compiler.
 */
#if defined(__VMS)
#define __FUNCTION__ "VMS$NL:"
#elif !(defined(__GNUC__) && __GNUC__ >= 2) && !(defined(_MSC_VER) && _MSC_VER >= 1300)
#define __FUNCTION__ "unknown"
#endif


#include "config.h"

#endif /* GLHEADER_H */
