src/mesa/main/imports.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \file imports.h
  28  * Standard C library function wrappers.
  29  *
  30  * This file provides wrappers for all the standard C library functions
  31  * like malloc(), free(), printf(), getenv(), etc.
  32  */
  33
  34
  35 #ifndef IMPORTS_H
  36 #define IMPORTS_H
  37
  38
  39 #include "compiler.h"
  40 #include "glheader.h"
  41
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47
  48 /**********************************************************************/
  49 /** Memory macros */
  50 /*@{*/
  51
  52 /** Allocate \p BYTES bytes */
  53 #define MALLOC(BYTES)      _mesa_malloc(BYTES)
  54 /** Allocate and zero \p BYTES bytes */
  55 #define CALLOC(BYTES)      _mesa_calloc(BYTES)
  56 /** Allocate a structure of type \p T */
  57 #define MALLOC_STRUCT(T)   (struct T *) _mesa_malloc(sizeof(struct T))
  58 /** Allocate and zero a structure of type \p T */
  59 #define CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
  60 /** Free memory */
  61 #define FREE(PTR)          _mesa_free(PTR)
  62
  63 /** Allocate \p BYTES aligned at \p N bytes */
  64 #define ALIGN_MALLOC(BYTES, N)     _mesa_align_malloc(BYTES, N)
  65 /** Allocate and zero \p BYTES bytes aligned at \p N bytes */
  66 #define ALIGN_CALLOC(BYTES, N)     _mesa_align_calloc(BYTES, N)
  67 /** Allocate a structure of type \p T aligned at \p N bytes */
  68 #define ALIGN_MALLOC_STRUCT(T, N)  (struct T *) _mesa_align_malloc(sizeof(struct T), N)
  69 /** Allocate and zero a structure of type \p T aligned at \p N bytes */
  70 #define ALIGN_CALLOC_STRUCT(T, N)  (struct T *) _mesa_align_calloc(sizeof(struct T), N)
  71 /** Free aligned memory */
  72 #define ALIGN_FREE(PTR)            _mesa_align_free(PTR)
  73
  74 /** Copy \p BYTES bytes from \p SRC into \p DST */
  75 #define MEMCPY( DST, SRC, BYTES)   _mesa_memcpy(DST, SRC, BYTES)
  76 /** Set \p N bytes in \p DST to \p VAL */
  77 #define MEMSET( DST, VAL, N )      _mesa_memset(DST, VAL, N)
  78
  79 /*@}*/
  80
  81
  82 /*
  83  * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
  84  * as offsets into buffer stores.  Since the vertex array pointer and
  85  * buffer store pointer are both pointers and we need to add them, we use
  86  * this macro.
  87  * Both pointers/offsets are expressed in bytes.
  88  */
  89 #define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )
  90
  91
  92 /**
  93  * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float
  94  * as a int (thereby using integer registers instead of FP registers) is
  95  * a performance win.  Typically, this can be done with ordinary casts.
  96  * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
  97  * these casts generate warnings.
  98  * The following union typedef is used to solve that.
  99  */
 100 typedef union { GLfloat f; GLint i; } fi_type;
 101
 102
 103
 104 /**********************************************************************
 105  * Math macros
 106  */
 107
 108 #define MAX_GLUSHORT    0xffff
 109 #define MAX_GLUINT      0xffffffff
 110
 111 /* Degrees to radians conversion: */
 112 #define DEG2RAD (M_PI/180.0)
 113
 114
 115 /***
 116  *** SQRTF: single-precision square root
 117  ***/
 118 #if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
 119 #  define SQRTF(X)  _mesa_sqrtf(X)
 120 #else
 121 #  define SQRTF(X)  (float) sqrt((float) (X))
 122 #endif
 123
 124
 125 /***
 126  *** INV_SQRTF: single-precision inverse square root
 127  ***/
 128 #if 0
 129 #define INV_SQRTF(X) _mesa_inv_sqrt(X)
 130 #else
 131 #define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
 132 #endif
 133
 134
 135 /***
 136  *** LOG2: Log base 2 of float
 137  ***/
 138 #ifdef USE_IEEE
 139 #if 0
 140 /* This is pretty fast, but not accurate enough (only 2 fractional bits).
 141  * Based on code from http://www.stereopsis.com/log2.html
 142  */
 143 static INLINE GLfloat LOG2(GLfloat x)
 144 {
 145    const GLfloat y = x * x * x * x;
 146    const GLuint ix = *((GLuint *) &y);
 147    const GLuint exp = (ix >> 23) & 0xFF;
 148    const GLint log2 = ((GLint) exp) - 127;
 149    return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
 150 }
 151 #endif
 152 /* Pretty fast, and accurate.
 153  * Based on code from http://www.flipcode.com/totd/
 154  */
 155 static INLINE GLfloat LOG2(GLfloat val)
 156 {
 157    fi_type num;
 158    GLint log_2;
 159    num.f = val;
 160    log_2 = ((num.i >> 23) & 255) - 128;
 161    num.i &= ~(255 << 23);
 162    num.i += 127 << 23;
 163    num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
 164    return num.f + log_2;
 165 }
 166 #else
 167 /*
 168  * NOTE: log_base_2(x) = log(x) / log(2)
 169  * NOTE: 1.442695 = 1/log(2).
 170  */
 171 #define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))
 172 #endif
 173
 174
 175 /***
 176  *** IS_INF_OR_NAN: test if float is infinite or NaN
 177  ***/
 178 #ifdef USE_IEEE
 179 static INLINE int IS_INF_OR_NAN( float x )
 180 {
 181    fi_type tmp;
 182    tmp.f = x;
 183    return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
 184 }
 185 #elif defined(isfinite)
 186 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 187 #elif defined(finite)
 188 #define IS_INF_OR_NAN(x)        (!finite(x))
 189 #elif defined(__VMS)
 190 #define IS_INF_OR_NAN(x)        (!finite(x))
 191 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 192 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 193 #else
 194 #define IS_INF_OR_NAN(x)        (!finite(x))
 195 #endif
 196
 197
 198 /***
 199  *** IS_NEGATIVE: test if float is negative
 200  ***/
 201 #if defined(USE_IEEE)
 202 static INLINE int GET_FLOAT_BITS( float x )
 203 {
 204    fi_type fi;
 205    fi.f = x;
 206    return fi.i;
 207 }
 208 #define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
 209 #else
 210 #define IS_NEGATIVE(x) (x < 0.0F)
 211 #endif
 212
 213
 214 /***
 215  *** DIFFERENT_SIGNS: test if two floats have opposite signs
 216  ***/
 217 #if defined(USE_IEEE)
 218 #define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
 219 #else
 220 /* Could just use (x*y<0) except for the flatshading requirements.
 221  * Maybe there's a better way?
 222  */
 223 #define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
 224 #endif
 225
 226
 227 /***
 228  *** CEILF: ceiling of float
 229  *** FLOORF: floor of float
 230  *** FABSF: absolute value of float
 231  *** LOGF: the natural logarithm (base e) of the value
 232  *** EXPF: raise e to the value
 233  *** LDEXPF: multiply value by an integral power of two
 234  *** FREXPF: extract mantissa and exponent from value
 235  ***/
 236 #if defined(__gnu_linux__)
 237 /* C99 functions */
 238 #define CEILF(x)   ceilf(x)
 239 #define FLOORF(x)  floorf(x)
 240 #define FABSF(x)   fabsf(x)
 241 #define LOGF(x)    logf(x)
 242 #define EXPF(x)    expf(x)
 243 #define LDEXPF(x,y)  ldexpf(x,y)
 244 #define FREXPF(x,y)  frexpf(x,y)
 245 #else
 246 #define CEILF(x)   ((GLfloat) ceil(x))
 247 #define FLOORF(x)  ((GLfloat) floor(x))
 248 #define FABSF(x)   ((GLfloat) fabs(x))
 249 #define LOGF(x)    ((GLfloat) log(x))
 250 #define EXPF(x)    ((GLfloat) exp(x))
 251 #define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))
 252 #define FREXPF(x,y)  ((GLfloat) frexp(x,y))
 253 #endif
 254
 255
 256 /***
 257  *** IROUND: return (as an integer) float rounded to nearest integer
 258  ***/
 259 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
 260                         (!(defined(__BEOS__) || defined(__HAIKU__))  || \
 261                         (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 262 static INLINE int iround(float f)
 263 {
 264    int r;
 265    __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
 266    return r;
 267 }
 268 #define IROUND(x)  iround(x)
 269 #elif defined(USE_X86_ASM) && defined(_MSC_VER)
 270 static INLINE int iround(float f)
 271 {
 272    int r;
 273    _asm {
 274          fld f
 275          fistp r
 276         }
 277    return r;
 278 }
 279 #define IROUND(x)  iround(x)
 280 #elif defined(__WATCOMC__) && defined(__386__)
 281 long iround(float f);
 282 #pragma aux iround =                    \
 283         "push   eax"                        \
 284         "fistp  dword ptr [esp]"            \
 285         "pop    eax"                        \
 286         parm [8087]                         \
 287         value [eax]                         \
 288         modify exact [eax];
 289 #define IROUND(x)  iround(x)
 290 #else
 291 #define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 292 #endif
 293
 294 #define IROUND64(f)  ((GLint64) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 295
 296 /***
 297  *** IROUND_POS: return (as an integer) positive float rounded to nearest int
 298  ***/
 299 #ifdef DEBUG
 300 #define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
 301 #else
 302 #define IROUND_POS(f) (IROUND(f))
 303 #endif
 304
 305
 306 /***
 307  *** IFLOOR: return (as an integer) floor of float
 308  ***/
 309 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 310 /*
 311  * IEEE floor for computers that round to nearest or even.
 312  * 'f' must be between -4194304 and 4194303.
 313  * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
 314  * but uses some IEEE specific tricks for better speed.
 315  * Contributed by Josh Vanderhoof
 316  */
 317 static INLINE int ifloor(float f)
 318 {
 319    int ai, bi;
 320    double af, bf;
 321    af = (3 << 22) + 0.5 + (double)f;
 322    bf = (3 << 22) + 0.5 - (double)f;
 323    /* GCC generates an extra fstp/fld without this. */
 324    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 325    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 326    return (ai - bi) >> 1;
 327 }
 328 #define IFLOOR(x)  ifloor(x)
 329 #elif defined(USE_IEEE)
 330 static INLINE int ifloor(float f)
 331 {
 332    int ai, bi;
 333    double af, bf;
 334    fi_type u;
 335
 336    af = (3 << 22) + 0.5 + (double)f;
 337    bf = (3 << 22) + 0.5 - (double)f;
 338    u.f = (float) af;  ai = u.i;
 339    u.f = (float) bf;  bi = u.i;
 340    return (ai - bi) >> 1;
 341 }
 342 #define IFLOOR(x)  ifloor(x)
 343 #else
 344 static INLINE int ifloor(float f)
 345 {
 346    int i = IROUND(f);
 347    return (i > f) ? i - 1 : i;
 348 }
 349 #define IFLOOR(x)  ifloor(x)
 350 #endif
 351
 352
 353 /***
 354  *** ICEIL: return (as an integer) ceiling of float
 355  ***/
 356 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 357 /*
 358  * IEEE ceil for computers that round to nearest or even.
 359  * 'f' must be between -4194304 and 4194303.
 360  * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
 361  * but uses some IEEE specific tricks for better speed.
 362  * Contributed by Josh Vanderhoof
 363  */
 364 static INLINE int iceil(float f)
 365 {
 366    int ai, bi;
 367    double af, bf;
 368    af = (3 << 22) + 0.5 + (double)f;
 369    bf = (3 << 22) + 0.5 - (double)f;
 370    /* GCC generates an extra fstp/fld without this. */
 371    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 372    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 373    return (ai - bi + 1) >> 1;
 374 }
 375 #define ICEIL(x)  iceil(x)
 376 #elif defined(USE_IEEE)
 377 static INLINE int iceil(float f)
 378 {
 379    int ai, bi;
 380    double af, bf;
 381    fi_type u;
 382    af = (3 << 22) + 0.5 + (double)f;
 383    bf = (3 << 22) + 0.5 - (double)f;
 384    u.f = (float) af; ai = u.i;
 385    u.f = (float) bf; bi = u.i;
 386    return (ai - bi + 1) >> 1;
 387 }
 388 #define ICEIL(x)  iceil(x)
 389 #else
 390 static INLINE int iceil(float f)
 391 {
 392    int i = IROUND(f);
 393    return (i < f) ? i + 1 : i;
 394 }
 395 #define ICEIL(x)  iceil(x)
 396 #endif
 397
 398
 399 /**
 400  * Is x a power of two?
 401  */
 402 static INLINE int
 403 _mesa_is_pow_two(int x)
 404 {
 405    return !(x & (x - 1));
 406 }
 407
 408 /**
 409  * Round given integer to next higer power of two
 410  * If X is zero result is undefined.
 411  *
 412  * Source for the fallback implementation is
 413  * Sean Eron Anderson's webpage "Bit Twiddling Hacks"
 414  * http://graphics.stanford.edu/~seander/bithacks.html
 415  *
 416  * When using builtin function have to do some work
 417  * for case when passed values 1 to prevent hiting
 418  * undefined result from __builtin_clz. Undefined
 419  * results would be different depending on optimization
 420  * level used for build.
 421  */
 422 static INLINE int32_t
 423 _mesa_next_pow_two_32(uint32_t x)
 424 {
 425 #ifdef __GNUC__
 426         uint32_t y = (x != 1);
 427         return (1 + y) << ((__builtin_clz(x - y) ^ 31) );
 428 #else
 429         x--;
 430         x |= x >> 1;
 431         x |= x >> 2;
 432         x |= x >> 4;
 433         x |= x >> 8;
 434         x |= x >> 16;
 435         x++;
 436         return x;
 437 #endif
 438 }
 439
 440 static INLINE int64_t
 441 _mesa_next_pow_two_64(uint64_t x)
 442 {
 443 #ifdef __GNUC__
 444         uint64_t y = (x != 1);
 445         if (sizeof(x) == sizeof(long))
 446                 return (1 + y) << ((__builtin_clzl(x - y) ^ 63));
 447         else
 448                 return (1 + y) << ((__builtin_clzll(x - y) ^ 63));
 449 #else
 450         x--;
 451         x |= x >> 1;
 452         x |= x >> 2;
 453         x |= x >> 4;
 454         x |= x >> 8;
 455         x |= x >> 16;
 456         x |= x >> 32;
 457         x++;
 458         return x;
 459 #endif
 460 }
 461
 462
 463 /***
 464  *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
 465  *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
 466  ***/
 467 #if defined(USE_IEEE) && !defined(DEBUG)
 468 #define IEEE_0996 0x3f7f0000    /* 0.996 or so */
 469 /* This function/macro is sensitive to precision.  Test very carefully
 470  * if you change it!
 471  */
 472 #define UNCLAMPED_FLOAT_TO_UBYTE(UB, F)                                 \
 473         do {                                                            \
 474            fi_type __tmp;                                               \
 475            __tmp.f = (F);                                               \
 476            if (__tmp.i < 0)                                             \
 477               UB = (GLubyte) 0;                                         \
 478            else if (__tmp.i >= IEEE_0996)                               \
 479               UB = (GLubyte) 255;                                       \
 480            else {                                                       \
 481               __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;           \
 482               UB = (GLubyte) __tmp.i;                                   \
 483            }                                                            \
 484         } while (0)
 485 #define CLAMPED_FLOAT_TO_UBYTE(UB, F)                                   \
 486         do {                                                            \
 487            fi_type __tmp;                                               \
 488            __tmp.f = (F) * (255.0F/256.0F) + 32768.0F;                  \
 489            UB = (GLubyte) __tmp.i;                                      \
 490         } while (0)
 491 #else
 492 #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
 493         ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
 494 #define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
 495         ub = ((GLubyte) IROUND((f) * 255.0F))
 496 #endif
 497
 498
 499 /**
 500  * Return 1 if this is a little endian machine, 0 if big endian.
 501  */
 502 static INLINE GLboolean
 503 _mesa_little_endian(void)
 504 {
 505    const GLuint ui = 1; /* intentionally not static */
 506    return *((const GLubyte *) &ui);
 507 }
 508
 509
 510
 511 /**********************************************************************
 512  * Functions
 513  */
 514
 515 extern void *
 516 _mesa_malloc( size_t bytes );
 517
 518 extern void *
 519 _mesa_calloc( size_t bytes );
 520
 521 extern void
 522 _mesa_free( void *ptr );
 523
 524 extern void *
 525 _mesa_align_malloc( size_t bytes, unsigned long alignment );
 526
 527 extern void *
 528 _mesa_align_calloc( size_t bytes, unsigned long alignment );
 529
 530 extern void
 531 _mesa_align_free( void *ptr );
 532
 533 extern void *
 534 _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
 535                     unsigned long alignment);
 536
 537 extern void *
 538 _mesa_exec_malloc( GLuint size );
 539
 540 extern void
 541 _mesa_exec_free( void *addr );
 542
 543 extern void *
 544 _mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
 545
 546 extern void *
 547 _mesa_memcpy( void *dest, const void *src, size_t n );
 548
 549 extern void
 550 _mesa_memset( void *dst, int val, size_t n );
 551
 552 extern void
 553 _mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
 554
 555 extern void
 556 _mesa_bzero( void *dst, size_t n );
 557
 558 extern int
 559 _mesa_memcmp( const void *s1, const void *s2, size_t n );
 560
 561 extern double
 562 _mesa_sin(double a);
 563
 564 extern float
 565 _mesa_sinf(float a);
 566
 567 extern double
 568 _mesa_cos(double a);
 569
 570 extern float
 571 _mesa_asinf(float x);
 572
 573 extern float
 574 _mesa_atanf(float x);
 575
 576 extern double
 577 _mesa_sqrtd(double x);
 578
 579 extern float
 580 _mesa_sqrtf(float x);
 581
 582 extern float
 583 _mesa_inv_sqrtf(float x);
 584
 585 extern void
 586 _mesa_init_sqrt_table(void);
 587
 588 extern double
 589 _mesa_pow(double x, double y);
 590
 591 extern int
 592 _mesa_ffs(int32_t i);
 593
 594 extern int
 595 _mesa_ffsll(int64_t i);
 596
 597 extern unsigned int
 598 _mesa_bitcount(unsigned int n);
 599
 600 extern GLhalfARB
 601 _mesa_float_to_half(float f);
 602
 603 extern float
 604 _mesa_half_to_float(GLhalfARB h);
 605
 606
 607 extern void *
 608 _mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size,
 609                int (*compar)(const void *, const void *) );
 610
 611 extern char *
 612 _mesa_getenv( const char *var );
 613
 614 extern char *
 615 _mesa_strncpy( char *dest, const char *src, size_t n );
 616
 617 extern size_t
 618 _mesa_strlen( const char *s );
 619
 620 extern int
 621 _mesa_strcmp( const char *s1, const char *s2 );
 622
 623 extern int
 624 _mesa_strncmp( const char *s1, const char *s2, size_t n );
 625
 626 extern char *
 627 _mesa_strdup( const char *s );
 628
 629 extern int
 630 _mesa_atoi( const char *s );
 631
 632 extern double
 633 _mesa_strtod( const char *s, char **end );
 634
 635 extern unsigned int
 636 _mesa_str_checksum(const char *str);
 637
 638 extern int
 639 _mesa_sprintf( char *str, const char *fmt, ... );
 640
 641 extern int
 642 _mesa_snprintf( char *str, size_t size, const char *fmt, ... );
 643
 644 extern void
 645 _mesa_printf( const char *fmtString, ... );
 646
 647 extern void
 648 _mesa_fprintf( FILE *f, const char *fmtString, ... );
 649
 650 extern int
 651 _mesa_vsprintf( char *str, const char *fmt, va_list args );
 652
 653
 654 extern void
 655 _mesa_warning( __GLcontext *gc, const char *fmtString, ... );
 656
 657 extern void
 658 _mesa_problem( const __GLcontext *ctx, const char *fmtString, ... );
 659
 660 extern void
 661 _mesa_error( __GLcontext *ctx, GLenum error, const char *fmtString, ... );
 662
 663 extern void
 664 _mesa_debug( const __GLcontext *ctx, const char *fmtString, ... );
 665
 666 #ifdef __cplusplus
 667 }
 668 #endif
 669
 670
 671 #endif /* IMPORTS_H */