xserver libX11 pixman mesa git update 22 Feb 2011

1 files changed, 615 insertions, 602 deletions

diff --git a/mesalib/src/mesa/main/imports.h b/mesalib/src/mesa/main/imports.h
index af7a8cc00..a994dbcae 100644
--- a/mesalib/src/mesa/main/imports.h
+++ b/mesalib/src/mesa/main/imports.h
@@ -1,602 +1,615 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.5

- *

- * Copyright (C) 1999-2008  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.

- */

-

-

-/**

- * \file imports.h

- * Standard C library function wrappers.

- *

- * This file provides wrappers for all the standard C library functions

- * like malloc(), free(), printf(), getenv(), etc.

- */

-

-

-#ifndef IMPORTS_H

-#define IMPORTS_H

-

-

-#include "compiler.h"

-#include "glheader.h"

-

-

-#ifdef __cplusplus

-extern "C" {

-#endif

-

-

-/**********************************************************************/

-/** Memory macros */

-/*@{*/

-

-/** Allocate \p BYTES bytes */

-#define MALLOC(BYTES)      malloc(BYTES)

-/** Allocate and zero \p BYTES bytes */

-#define CALLOC(BYTES)      calloc(1, BYTES)

-/** Allocate a structure of type \p T */

-#define MALLOC_STRUCT(T)   (struct T *) malloc(sizeof(struct T))

-/** Allocate and zero a structure of type \p T */

-#define CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))

-/** Free memory */

-#define FREE(PTR)          free(PTR)

-

-/*@}*/

-

-

-/*

- * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers

- * as offsets into buffer stores.  Since the vertex array pointer and

- * buffer store pointer are both pointers and we need to add them, we use

- * this macro.

- * Both pointers/offsets are expressed in bytes.

- */

-#define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )

-

-

-/**

- * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float

- * as a int (thereby using integer registers instead of FP registers) is

- * a performance win.  Typically, this can be done with ordinary casts.

- * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)

- * these casts generate warnings.

- * The following union typedef is used to solve that.

- */

-typedef union { GLfloat f; GLint i; } fi_type;

-

-

-

-/**********************************************************************

- * Math macros

- */

-

-#define MAX_GLUSHORT	0xffff

-#define MAX_GLUINT	0xffffffff

-

-/* Degrees to radians conversion: */

-#define DEG2RAD (M_PI/180.0)

-

-

-/***

- *** SQRTF: single-precision square root

- ***/

-#if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */

-#  define SQRTF(X)  _mesa_sqrtf(X)

-#else

-#  define SQRTF(X)  (float) sqrt((float) (X))

-#endif

-

-

-/***

- *** INV_SQRTF: single-precision inverse square root

- ***/

-#if 0

-#define INV_SQRTF(X) _mesa_inv_sqrt(X)

-#else

-#define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */

-#endif

-

-

-/**

- * \name Work-arounds for platforms that lack C99 math functions

- */

-/*@{*/

-#if (!defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE < 600)) && !defined(_ISOC99_SOURCE) \

-   && (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)) \

-   && (!defined(_MSC_VER) || (_MSC_VER < 1400))

-#define acosf(f) ((float) acos(f))

-#define asinf(f) ((float) asin(f))

-#define atan2f(x,y) ((float) atan2(x,y))

-#define atanf(f) ((float) atan(f))

-#define cielf(f) ((float) ciel(f))

-#define cosf(f) ((float) cos(f))

-#define coshf(f) ((float) cosh(f))

-#define expf(f) ((float) exp(f))

-#define exp2f(f) ((float) exp2(f))

-#define floorf(f) ((float) floor(f))

-#define logf(f) ((float) log(f))

-#define log2f(f) ((float) log2(f))

-#define powf(x,y) ((float) pow(x,y))

-#define sinf(f) ((float) sin(f))

-#define sinhf(f) ((float) sinh(f))

-#define sqrtf(f) ((float) sqrt(f))

-#define tanf(f) ((float) tan(f))

-#define tanhf(f) ((float) tanh(f))

-#define acoshf(f) ((float) acosh(f))

-#define asinhf(f) ((float) asinh(f))

-#define atanhf(f) ((float) atanh(f))

-#endif

-

-#if defined(_MSC_VER)

-static INLINE float truncf(float x) { return x < 0.0f ? ceilf(x) : floorf(x); }

-static INLINE float exp2f(float x) { return powf(2.0f, x); }

-static INLINE float log2f(float x) { return logf(x) * 1.442695041f; }

-static INLINE float asinhf(float x) { return logf(x + sqrtf(x * x + 1.0f)); }

-static INLINE float acoshf(float x) { return logf(x + sqrtf(x * x - 1.0f)); }

-static INLINE float atanhf(float x) { return (logf(1.0f + x) - logf(1.0f - x)) / 2.0f; }

-static INLINE int isblank(int ch) { return ch == ' ' || ch == '\t'; }

-#define strtoll(p, e, b) _strtoi64(p, e, b)

-#endif

-/*@}*/

-

-/***

- *** LOG2: Log base 2 of float

- ***/

-#ifdef USE_IEEE

-#if 0

-/* This is pretty fast, but not accurate enough (only 2 fractional bits).

- * Based on code from http://www.stereopsis.com/log2.html

- */

-static INLINE GLfloat LOG2(GLfloat x)

-{

-   const GLfloat y = x * x * x * x;

-   const GLuint ix = *((GLuint *) &y);

-   const GLuint exp = (ix >> 23) & 0xFF;

-   const GLint log2 = ((GLint) exp) - 127;

-   return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */

-}

-#endif

-/* Pretty fast, and accurate.

- * Based on code from http://www.flipcode.com/totd/

- */

-static INLINE GLfloat LOG2(GLfloat val)

-{

-   fi_type num;

-   GLint log_2;

-   num.f = val;

-   log_2 = ((num.i >> 23) & 255) - 128;

-   num.i &= ~(255 << 23);

-   num.i += 127 << 23;

-   num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;

-   return num.f + log_2;

-}

-#else

-/*

- * NOTE: log_base_2(x) = log(x) / log(2)

- * NOTE: 1.442695 = 1/log(2).

- */

-#define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))

-#endif

-

-

-/***

- *** IS_INF_OR_NAN: test if float is infinite or NaN

- ***/

-#ifdef USE_IEEE

-static INLINE int IS_INF_OR_NAN( float x )

-{

-   fi_type tmp;

-   tmp.f = x;

-   return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);

-}

-#elif defined(isfinite)

-#define IS_INF_OR_NAN(x)        (!isfinite(x))

-#elif defined(finite)

-#define IS_INF_OR_NAN(x)        (!finite(x))

-#elif defined(__VMS)

-#define IS_INF_OR_NAN(x)        (!finite(x))

-#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L

-#define IS_INF_OR_NAN(x)        (!isfinite(x))

-#else

-#define IS_INF_OR_NAN(x)        (!finite(x))

-#endif

-

-

-/***

- *** IS_NEGATIVE: test if float is negative

- ***/

-#if defined(USE_IEEE)

-static INLINE int GET_FLOAT_BITS( float x )

-{

-   fi_type fi;

-   fi.f = x;

-   return fi.i;

-}

-#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)

-#else

-#define IS_NEGATIVE(x) (x < 0.0F)

-#endif

-

-

-/***

- *** DIFFERENT_SIGNS: test if two floats have opposite signs

- ***/

-#if defined(USE_IEEE)

-#define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))

-#else

-/* Could just use (x*y<0) except for the flatshading requirements.

- * Maybe there's a better way?

- */

-#define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)

-#endif

-

-

-/***

- *** CEILF: ceiling of float

- *** FLOORF: floor of float

- *** FABSF: absolute value of float

- *** LOGF: the natural logarithm (base e) of the value

- *** EXPF: raise e to the value

- *** LDEXPF: multiply value by an integral power of two

- *** FREXPF: extract mantissa and exponent from value

- ***/

-#if defined(__gnu_linux__)

-/* C99 functions */

-#define CEILF(x)   ceilf(x)

-#define FLOORF(x)  floorf(x)

-#define FABSF(x)   fabsf(x)

-#define LOGF(x)    logf(x)

-#define EXPF(x)    expf(x)

-#define LDEXPF(x,y)  ldexpf(x,y)

-#define FREXPF(x,y)  frexpf(x,y)

-#else

-#define CEILF(x)   ((GLfloat) ceil(x))

-#define FLOORF(x)  ((GLfloat) floor(x))

-#define FABSF(x)   ((GLfloat) fabs(x))

-#define LOGF(x)    ((GLfloat) log(x))

-#define EXPF(x)    ((GLfloat) exp(x))

-#define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))

-#define FREXPF(x,y)  ((GLfloat) frexp(x,y))

-#endif

-

-

-/***

- *** IROUND: return (as an integer) float rounded to nearest integer

- ***/

-#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)

-static INLINE int iround(float f)

-{

-   int r;

-   __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");

-   return r;

-}

-#define IROUND(x)  iround(x)

-#elif defined(USE_X86_ASM) && defined(_MSC_VER)

-static INLINE int iround(float f)

-{

-   int r;

-   _asm {

-	 fld f

-	 fistp r

-	}

-   return r;

-}

-#define IROUND(x)  iround(x)

-#elif defined(__WATCOMC__) && defined(__386__)

-long iround(float f);

-#pragma aux iround =                    \

-	"push   eax"                        \

-	"fistp  dword ptr [esp]"            \

-	"pop    eax"                        \

-	parm [8087]                         \

-	value [eax]                         \

-	modify exact [eax];

-#define IROUND(x)  iround(x)

-#else

-#define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))

-#endif

-

-#define IROUND64(f)  ((GLint64) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))

-

-/***

- *** IROUND_POS: return (as an integer) positive float rounded to nearest int

- ***/

-#ifdef DEBUG

-#define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))

-#else

-#define IROUND_POS(f) (IROUND(f))

-#endif

-

-

-/***

- *** IFLOOR: return (as an integer) floor of float

- ***/

-#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)

-/*

- * IEEE floor for computers that round to nearest or even.

- * 'f' must be between -4194304 and 4194303.

- * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",

- * but uses some IEEE specific tricks for better speed.

- * Contributed by Josh Vanderhoof

- */

-static INLINE int ifloor(float f)

-{

-   int ai, bi;

-   double af, bf;

-   af = (3 << 22) + 0.5 + (double)f;

-   bf = (3 << 22) + 0.5 - (double)f;

-   /* GCC generates an extra fstp/fld without this. */

-   __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");

-   __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");

-   return (ai - bi) >> 1;

-}

-#define IFLOOR(x)  ifloor(x)

-#elif defined(USE_IEEE)

-static INLINE int ifloor(float f)

-{

-   int ai, bi;

-   double af, bf;

-   fi_type u;

-

-   af = (3 << 22) + 0.5 + (double)f;

-   bf = (3 << 22) + 0.5 - (double)f;

-   u.f = (float) af;  ai = u.i;

-   u.f = (float) bf;  bi = u.i;

-   return (ai - bi) >> 1;

-}

-#define IFLOOR(x)  ifloor(x)

-#else

-static INLINE int ifloor(float f)

-{

-   int i = IROUND(f);

-   return (i > f) ? i - 1 : i;

-}

-#define IFLOOR(x)  ifloor(x)

-#endif

-

-

-/***

- *** ICEIL: return (as an integer) ceiling of float

- ***/

-#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)

-/*

- * IEEE ceil for computers that round to nearest or even.

- * 'f' must be between -4194304 and 4194303.

- * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",

- * but uses some IEEE specific tricks for better speed.

- * Contributed by Josh Vanderhoof

- */

-static INLINE int iceil(float f)

-{

-   int ai, bi;

-   double af, bf;

-   af = (3 << 22) + 0.5 + (double)f;

-   bf = (3 << 22) + 0.5 - (double)f;

-   /* GCC generates an extra fstp/fld without this. */

-   __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");

-   __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");

-   return (ai - bi + 1) >> 1;

-}

-#define ICEIL(x)  iceil(x)

-#elif defined(USE_IEEE)

-static INLINE int iceil(float f)

-{

-   int ai, bi;

-   double af, bf;

-   fi_type u;

-   af = (3 << 22) + 0.5 + (double)f;

-   bf = (3 << 22) + 0.5 - (double)f;

-   u.f = (float) af; ai = u.i;

-   u.f = (float) bf; bi = u.i;

-   return (ai - bi + 1) >> 1;

-}

-#define ICEIL(x)  iceil(x)

-#else

-static INLINE int iceil(float f)

-{

-   int i = IROUND(f);

-   return (i < f) ? i + 1 : i;

-}

-#define ICEIL(x)  iceil(x)

-#endif

-

-

-/**

- * Is x a power of two?

- */

-static INLINE int

-_mesa_is_pow_two(int x)

-{

-   return !(x & (x - 1));

-}

-

-/**

- * Round given integer to next higer power of two

- * If X is zero result is undefined.

- *

- * Source for the fallback implementation is

- * Sean Eron Anderson's webpage "Bit Twiddling Hacks"

- * http://graphics.stanford.edu/~seander/bithacks.html

- *

- * When using builtin function have to do some work

- * for case when passed values 1 to prevent hiting

- * undefined result from __builtin_clz. Undefined

- * results would be different depending on optimization

- * level used for build.

- */

-static INLINE int32_t

-_mesa_next_pow_two_32(uint32_t x)

-{

-#if defined(__GNUC__) && \

-	((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)

-	uint32_t y = (x != 1);

-	return (1 + y) << ((__builtin_clz(x - y) ^ 31) );

-#else

-	x--;

-	x |= x >> 1;

-	x |= x >> 2;

-	x |= x >> 4;

-	x |= x >> 8;

-	x |= x >> 16;

-	x++;

-	return x;

-#endif

-}

-

-static INLINE int64_t

-_mesa_next_pow_two_64(uint64_t x)

-{

-#if defined(__GNUC__) && \

-	((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)

-	uint64_t y = (x != 1);

-	if (sizeof(x) == sizeof(long))

-		return (1 + y) << ((__builtin_clzl(x - y) ^ 63));

-	else

-		return (1 + y) << ((__builtin_clzll(x - y) ^ 63));

-#else

-	x--;

-	x |= x >> 1;

-	x |= x >> 2;

-	x |= x >> 4;

-	x |= x >> 8;

-	x |= x >> 16;

-	x |= x >> 32;

-	x++;

-	return x;

-#endif

-}

-

-

-/**

- * Return 1 if this is a little endian machine, 0 if big endian.

- */

-static INLINE GLboolean

-_mesa_little_endian(void)

-{

-   const GLuint ui = 1; /* intentionally not static */

-   return *((const GLubyte *) &ui);

-}

-

-

-

-/**********************************************************************

- * Functions

- */

-

-extern void *

-_mesa_align_malloc( size_t bytes, unsigned long alignment );

-

-extern void *

-_mesa_align_calloc( size_t bytes, unsigned long alignment );

-

-extern void

-_mesa_align_free( void *ptr );

-

-extern void *

-_mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,

-                    unsigned long alignment);

-

-extern void *

-_mesa_exec_malloc( GLuint size );

-

-extern void 

-_mesa_exec_free( void *addr );

-

-extern void *

-_mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );

-

-extern void

-_mesa_memset16( unsigned short *dst, unsigned short val, size_t n );

-

-extern double

-_mesa_sqrtd(double x);

-

-extern float

-_mesa_sqrtf(float x);

-

-extern float

-_mesa_inv_sqrtf(float x);

-

-extern void

-_mesa_init_sqrt_table(void);

-

-extern int

-_mesa_ffs(int32_t i);

-

-extern int

-_mesa_ffsll(int64_t i);

-

-extern unsigned int

-_mesa_bitcount(unsigned int n);

-

-extern GLhalfARB

-_mesa_float_to_half(float f);

-

-extern float

-_mesa_half_to_float(GLhalfARB h);

-

-

-extern void *

-_mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size, 

-               int (*compar)(const void *, const void *) );

-

-extern char *

-_mesa_getenv( const char *var );

-

-extern char *

-_mesa_strdup( const char *s );

-

-extern float

-_mesa_strtof( const char *s, char **end );

-

-extern unsigned int

-_mesa_str_checksum(const char *str);

-

-extern int

-_mesa_snprintf( char *str, size_t size, const char *fmt, ... ) PRINTFLIKE(3, 4);

-

-struct gl_context;

-

-extern void

-_mesa_warning( struct gl_context *gc, const char *fmtString, ... ) PRINTFLIKE(2, 3);

-

-extern void

-_mesa_problem( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);

-

-extern void

-_mesa_error( struct gl_context *ctx, GLenum error, const char *fmtString, ... ) PRINTFLIKE(3, 4);

-

-extern void

-_mesa_debug( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);

-

-

-#if defined(_MSC_VER) && !defined(snprintf)

-#define snprintf _snprintf

-#endif

-

-

-#ifdef __cplusplus

-}

-#endif

-

-

-#endif /* IMPORTS_H */

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.5
+ *
+ * Copyright (C) 1999-2008  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.
+ */
+
+
+/**
+ * \file imports.h
+ * Standard C library function wrappers.
+ *
+ * This file provides wrappers for all the standard C library functions
+ * like malloc(), free(), printf(), getenv(), etc.
+ */
+
+
+#ifndef IMPORTS_H
+#define IMPORTS_H
+
+
+#include "compiler.h"
+#include "glheader.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**********************************************************************/
+/** Memory macros */
+/*@{*/
+
+/** Allocate \p BYTES bytes */
+#define MALLOC(BYTES)      malloc(BYTES)
+/** Allocate and zero \p BYTES bytes */
+#define CALLOC(BYTES)      calloc(1, BYTES)
+/** Allocate a structure of type \p T */
+#define MALLOC_STRUCT(T)   (struct T *) malloc(sizeof(struct T))
+/** Allocate and zero a structure of type \p T */
+#define CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
+/** Free memory */
+#define FREE(PTR)          free(PTR)
+
+/*@}*/
+
+
+/*
+ * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
+ * as offsets into buffer stores.  Since the vertex array pointer and
+ * buffer store pointer are both pointers and we need to add them, we use
+ * this macro.
+ * Both pointers/offsets are expressed in bytes.
+ */
+#define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )
+
+
+/**
+ * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float
+ * as a int (thereby using integer registers instead of FP registers) is
+ * a performance win.  Typically, this can be done with ordinary casts.
+ * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
+ * these casts generate warnings.
+ * The following union typedef is used to solve that.
+ */
+typedef union { GLfloat f; GLint i; } fi_type;
+
+
+
+/**********************************************************************
+ * Math macros
+ */
+
+#define MAX_GLUSHORT	0xffff
+#define MAX_GLUINT	0xffffffff
+
+/* Degrees to radians conversion: */
+#define DEG2RAD (M_PI/180.0)
+
+
+/***
+ *** SQRTF: single-precision square root
+ ***/
+#if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
+#  define SQRTF(X)  _mesa_sqrtf(X)
+#else
+#  define SQRTF(X)  (float) sqrt((float) (X))
+#endif
+
+
+/***
+ *** INV_SQRTF: single-precision inverse square root
+ ***/
+#if 0
+#define INV_SQRTF(X) _mesa_inv_sqrt(X)
+#else
+#define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
+#endif
+
+
+/**
+ * \name Work-arounds for platforms that lack C99 math functions
+ */
+/*@{*/
+#if (!defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE < 600)) && !defined(_ISOC99_SOURCE) \
+   && (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)) \
+   && (!defined(_MSC_VER) || (_MSC_VER < 1400))
+#define acosf(f) ((float) acos(f))
+#define asinf(f) ((float) asin(f))
+#define atan2f(x,y) ((float) atan2(x,y))
+#define atanf(f) ((float) atan(f))
+#define cielf(f) ((float) ciel(f))
+#define cosf(f) ((float) cos(f))
+#define coshf(f) ((float) cosh(f))
+#define expf(f) ((float) exp(f))
+#define exp2f(f) ((float) exp2(f))
+#define floorf(f) ((float) floor(f))
+#define logf(f) ((float) log(f))
+#define log2f(f) ((float) log2(f))
+#define powf(x,y) ((float) pow(x,y))
+#define sinf(f) ((float) sin(f))
+#define sinhf(f) ((float) sinh(f))
+#define sqrtf(f) ((float) sqrt(f))
+#define tanf(f) ((float) tan(f))
+#define tanhf(f) ((float) tanh(f))
+#define acoshf(f) ((float) acosh(f))
+#define asinhf(f) ((float) asinh(f))
+#define atanhf(f) ((float) atanh(f))
+#endif
+
+#if defined(_MSC_VER)
+static INLINE float truncf(float x) { return x < 0.0f ? ceilf(x) : floorf(x); }
+static INLINE float exp2f(float x) { return powf(2.0f, x); }
+static INLINE float log2f(float x) { return logf(x) * 1.442695041f; }
+static INLINE float asinhf(float x) { return logf(x + sqrtf(x * x + 1.0f)); }
+static INLINE float acoshf(float x) { return logf(x + sqrtf(x * x - 1.0f)); }
+static INLINE float atanhf(float x) { return (logf(1.0f + x) - logf(1.0f - x)) / 2.0f; }
+static INLINE int isblank(int ch) { return ch == ' ' || ch == '\t'; }
+#define strtoll(p, e, b) _strtoi64(p, e, b)
+#endif
+/*@}*/
+
+/***
+ *** LOG2: Log base 2 of float
+ ***/
+#ifdef USE_IEEE
+#if 0
+/* This is pretty fast, but not accurate enough (only 2 fractional bits).
+ * Based on code from http://www.stereopsis.com/log2.html
+ */
+static INLINE GLfloat LOG2(GLfloat x)
+{
+   const GLfloat y = x * x * x * x;
+   const GLuint ix = *((GLuint *) &y);
+   const GLuint exp = (ix >> 23) & 0xFF;
+   const GLint log2 = ((GLint) exp) - 127;
+   return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
+}
+#endif
+/* Pretty fast, and accurate.
+ * Based on code from http://www.flipcode.com/totd/
+ */
+static INLINE GLfloat LOG2(GLfloat val)
+{
+   fi_type num;
+   GLint log_2;
+   num.f = val;
+   log_2 = ((num.i >> 23) & 255) - 128;
+   num.i &= ~(255 << 23);
+   num.i += 127 << 23;
+   num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
+   return num.f + log_2;
+}
+#else
+/*
+ * NOTE: log_base_2(x) = log(x) / log(2)
+ * NOTE: 1.442695 = 1/log(2).
+ */
+#define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))
+#endif
+
+
+/***
+ *** IS_INF_OR_NAN: test if float is infinite or NaN
+ ***/
+#ifdef USE_IEEE
+static INLINE int IS_INF_OR_NAN( float x )
+{
+   fi_type tmp;
+   tmp.f = x;
+   return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
+}
+#elif defined(isfinite)
+#define IS_INF_OR_NAN(x)        (!isfinite(x))
+#elif defined(finite)
+#define IS_INF_OR_NAN(x)        (!finite(x))
+#elif defined(__VMS)
+#define IS_INF_OR_NAN(x)        (!finite(x))
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#define IS_INF_OR_NAN(x)        (!isfinite(x))
+#else
+#define IS_INF_OR_NAN(x)        (!finite(x))
+#endif
+
+
+/***
+ *** IS_NEGATIVE: test if float is negative
+ ***/
+#if defined(USE_IEEE)
+static INLINE int GET_FLOAT_BITS( float x )
+{
+   fi_type fi;
+   fi.f = x;
+   return fi.i;
+}
+#define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
+#else
+#define IS_NEGATIVE(x) (x < 0.0F)
+#endif
+
+
+/***
+ *** DIFFERENT_SIGNS: test if two floats have opposite signs
+ ***/
+#if defined(USE_IEEE)
+#define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
+#else
+/* Could just use (x*y<0) except for the flatshading requirements.
+ * Maybe there's a better way?
+ */
+#define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
+#endif
+
+
+/***
+ *** CEILF: ceiling of float
+ *** FLOORF: floor of float
+ *** FABSF: absolute value of float
+ *** LOGF: the natural logarithm (base e) of the value
+ *** EXPF: raise e to the value
+ *** LDEXPF: multiply value by an integral power of two
+ *** FREXPF: extract mantissa and exponent from value
+ ***/
+#if defined(__gnu_linux__)
+/* C99 functions */
+#define CEILF(x)   ceilf(x)
+#define FLOORF(x)  floorf(x)
+#define FABSF(x)   fabsf(x)
+#define LOGF(x)    logf(x)
+#define EXPF(x)    expf(x)
+#define LDEXPF(x,y)  ldexpf(x,y)
+#define FREXPF(x,y)  frexpf(x,y)
+#else
+#define CEILF(x)   ((GLfloat) ceil(x))
+#define FLOORF(x)  ((GLfloat) floor(x))
+#define FABSF(x)   ((GLfloat) fabs(x))
+#define LOGF(x)    ((GLfloat) log(x))
+#define EXPF(x)    ((GLfloat) exp(x))
+#define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))
+#define FREXPF(x,y)  ((GLfloat) frexp(x,y))
+#endif
+
+
+/***
+ *** IROUND: return (as an integer) float rounded to nearest integer
+ ***/
+#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+static INLINE int iround(float f)
+{
+   int r;
+   __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
+   return r;
+}
+#define IROUND(x)  iround(x)
+#elif defined(USE_X86_ASM) && defined(_MSC_VER)
+static INLINE int iround(float f)
+{
+   int r;
+   _asm {
+	 fld f
+	 fistp r
+	}
+   return r;
+}
+#define IROUND(x)  iround(x)
+#elif defined(__WATCOMC__) && defined(__386__)
+long iround(float f);
+#pragma aux iround =                    \
+	"push   eax"                        \
+	"fistp  dword ptr [esp]"            \
+	"pop    eax"                        \
+	parm [8087]                         \
+	value [eax]                         \
+	modify exact [eax];
+#define IROUND(x)  iround(x)
+#else
+#define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
+#endif
+
+#define IROUND64(f)  ((GLint64) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
+
+/***
+ *** IROUND_POS: return (as an integer) positive float rounded to nearest int
+ ***/
+#ifdef DEBUG
+#define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
+#else
+#define IROUND_POS(f) (IROUND(f))
+#endif
+
+
+/***
+ *** IFLOOR: return (as an integer) floor of float
+ ***/
+#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+/*
+ * IEEE floor for computers that round to nearest or even.
+ * 'f' must be between -4194304 and 4194303.
+ * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
+ * but uses some IEEE specific tricks for better speed.
+ * Contributed by Josh Vanderhoof
+ */
+static INLINE int ifloor(float f)
+{
+   int ai, bi;
+   double af, bf;
+   af = (3 << 22) + 0.5 + (double)f;
+   bf = (3 << 22) + 0.5 - (double)f;
+   /* GCC generates an extra fstp/fld without this. */
+   __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
+   __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
+   return (ai - bi) >> 1;
+}
+#define IFLOOR(x)  ifloor(x)
+#elif defined(USE_IEEE)
+static INLINE int ifloor(float f)
+{
+   int ai, bi;
+   double af, bf;
+   fi_type u;
+
+   af = (3 << 22) + 0.5 + (double)f;
+   bf = (3 << 22) + 0.5 - (double)f;
+   u.f = (float) af;  ai = u.i;
+   u.f = (float) bf;  bi = u.i;
+   return (ai - bi) >> 1;
+}
+#define IFLOOR(x)  ifloor(x)
+#else
+static INLINE int ifloor(float f)
+{
+   int i = IROUND(f);
+   return (i > f) ? i - 1 : i;
+}
+#define IFLOOR(x)  ifloor(x)
+#endif
+
+
+/***
+ *** ICEIL: return (as an integer) ceiling of float
+ ***/
+#if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
+/*
+ * IEEE ceil for computers that round to nearest or even.
+ * 'f' must be between -4194304 and 4194303.
+ * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
+ * but uses some IEEE specific tricks for better speed.
+ * Contributed by Josh Vanderhoof
+ */
+static INLINE int iceil(float f)
+{
+   int ai, bi;
+   double af, bf;
+   af = (3 << 22) + 0.5 + (double)f;
+   bf = (3 << 22) + 0.5 - (double)f;
+   /* GCC generates an extra fstp/fld without this. */
+   __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
+   __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
+   return (ai - bi + 1) >> 1;
+}
+#define ICEIL(x)  iceil(x)
+#elif defined(USE_IEEE)
+static INLINE int iceil(float f)
+{
+   int ai, bi;
+   double af, bf;
+   fi_type u;
+   af = (3 << 22) + 0.5 + (double)f;
+   bf = (3 << 22) + 0.5 - (double)f;
+   u.f = (float) af; ai = u.i;
+   u.f = (float) bf; bi = u.i;
+   return (ai - bi + 1) >> 1;
+}
+#define ICEIL(x)  iceil(x)
+#else
+static INLINE int iceil(float f)
+{
+   int i = IROUND(f);
+   return (i < f) ? i + 1 : i;
+}
+#define ICEIL(x)  iceil(x)
+#endif
+
+
+/**
+ * Is x a power of two?
+ */
+static INLINE int
+_mesa_is_pow_two(int x)
+{
+   return !(x & (x - 1));
+}
+
+/**
+ * Round given integer to next higer power of two
+ * If X is zero result is undefined.
+ *
+ * Source for the fallback implementation is
+ * Sean Eron Anderson's webpage "Bit Twiddling Hacks"
+ * http://graphics.stanford.edu/~seander/bithacks.html
+ *
+ * When using builtin function have to do some work
+ * for case when passed values 1 to prevent hiting
+ * undefined result from __builtin_clz. Undefined
+ * results would be different depending on optimization
+ * level used for build.
+ */
+static INLINE int32_t
+_mesa_next_pow_two_32(uint32_t x)
+{
+#if defined(__GNUC__) && \
+	((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+	uint32_t y = (x != 1);
+	return (1 + y) << ((__builtin_clz(x - y) ^ 31) );
+#else
+	x--;
+	x |= x >> 1;
+	x |= x >> 2;
+	x |= x >> 4;
+	x |= x >> 8;
+	x |= x >> 16;
+	x++;
+	return x;
+#endif
+}
+
+static INLINE int64_t
+_mesa_next_pow_two_64(uint64_t x)
+{
+#if defined(__GNUC__) && \
+	((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+	uint64_t y = (x != 1);
+	if (sizeof(x) == sizeof(long))
+		return (1 + y) << ((__builtin_clzl(x - y) ^ 63));
+	else
+		return (1 + y) << ((__builtin_clzll(x - y) ^ 63));
+#else
+	x--;
+	x |= x >> 1;
+	x |= x >> 2;
+	x |= x >> 4;
+	x |= x >> 8;
+	x |= x >> 16;
+	x |= x >> 32;
+	x++;
+	return x;
+#endif
+}
+
+
+/**
+ * Return 1 if this is a little endian machine, 0 if big endian.
+ */
+static INLINE GLboolean
+_mesa_little_endian(void)
+{
+   const GLuint ui = 1; /* intentionally not static */
+   return *((const GLubyte *) &ui);
+}
+
+
+
+/**********************************************************************
+ * Functions
+ */
+
+extern void *
+_mesa_align_malloc( size_t bytes, unsigned long alignment );
+
+extern void *
+_mesa_align_calloc( size_t bytes, unsigned long alignment );
+
+extern void
+_mesa_align_free( void *ptr );
+
+extern void *
+_mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
+                    unsigned long alignment);
+
+extern void *
+_mesa_exec_malloc( GLuint size );
+
+extern void 
+_mesa_exec_free( void *addr );
+
+extern void *
+_mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
+
+extern void
+_mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
+
+extern double
+_mesa_sqrtd(double x);
+
+extern float
+_mesa_sqrtf(float x);
+
+extern float
+_mesa_inv_sqrtf(float x);
+
+extern void
+_mesa_init_sqrt_table(void);
+
+#ifdef __GNUC__
+#define _mesa_ffs(i)  ffs(i)
+#define _mesa_ffsll(i)  ffsll(i)
+
+#if ((_GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+#define _mesa_bitcount(i) __builtin_popcount(i)
+#else
+extern unsigned int
+_mesa_bitcount(unsigned int n);
+#endif
+
+#else
+extern int
+_mesa_ffs(int32_t i);
+
+extern int
+_mesa_ffsll(int64_t i);
+
+extern unsigned int
+_mesa_bitcount(unsigned int n);
+#endif
+
+extern GLhalfARB
+_mesa_float_to_half(float f);
+
+extern float
+_mesa_half_to_float(GLhalfARB h);
+
+
+extern void *
+_mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size, 
+               int (*compar)(const void *, const void *) );
+
+extern char *
+_mesa_getenv( const char *var );
+
+extern char *
+_mesa_strdup( const char *s );
+
+extern float
+_mesa_strtof( const char *s, char **end );
+
+extern unsigned int
+_mesa_str_checksum(const char *str);
+
+extern int
+_mesa_snprintf( char *str, size_t size, const char *fmt, ... ) PRINTFLIKE(3, 4);
+
+struct gl_context;
+
+extern void
+_mesa_warning( struct gl_context *gc, const char *fmtString, ... ) PRINTFLIKE(2, 3);
+
+extern void
+_mesa_problem( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);
+
+extern void
+_mesa_error( struct gl_context *ctx, GLenum error, const char *fmtString, ... ) PRINTFLIKE(3, 4);
+
+extern void
+_mesa_debug( const struct gl_context *ctx, const char *fmtString, ... ) PRINTFLIKE(2, 3);
+
+
+#if defined(_MSC_VER) && !defined(snprintf)
+#define snprintf _snprintf
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* IMPORTS_H */