source: trunk/src/opengl/mesa/macros.h@ 2938

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1/* $Id: macros.h,v 1.1 2000-02-29 00:48:33 sandervl Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 3.1
6 *
7 * Copyright (C) 1999 Brian Paul All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28
29
30
31/*
32 * A collection of useful macros.
33 */
34
35
36#ifndef MACROS_H
37#define MACROS_H
38
39#ifndef XFree86Server
40#include <assert.h>
41#include <math.h>
42#include <string.h>
43#else
44#include <GL/glx_ansic.h>
45#endif
46
47
48#ifdef DEBUG
49# define ASSERT(X) assert(X)
50#else
51# define ASSERT(X)
52#endif
53
54
55#if defined(__GNUC__)
56#define INLINE __inline__
57#elif defined(__MSC__)
58#define INLINE __inline
59#else
60#define INLINE
61#endif
62
63
64/* Stepping a GLfloat pointer by a byte stride
65 */
66#define STRIDE_F(p, i) (p = (GLfloat *)((GLubyte *)p + i))
67#define STRIDE_UI(p, i) (p = (GLuint *)((GLubyte *)p + i))
68#define STRIDE_T(p, t, i) (p = (t *)((GLubyte *)p + i))
69
70
71/* Limits: */
72#define MAX_GLUSHORT 0xffff
73#define MAX_GLUINT 0xffffffff
74
75
76#define ZERO_2V( DST ) (DST)[0] = (DST)[1] = 0
77#define ZERO_3V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = 0
78#define ZERO_4V( DST ) (DST)[0] = (DST)[1] = (DST)[2] = (DST)[3] = 0
79
80
81/* Copy short vectors: */
82#define COPY_2V( DST, SRC ) \
83/*do*/ { \
84 (DST)[0] = (SRC)[0]; \
85 (DST)[1] = (SRC)[1]; \
86} /* while (0)*/
87
88
89#define COPY_3V( DST, SRC ) \
90/*do */{ \
91 (DST)[0] = (SRC)[0]; \
92 (DST)[1] = (SRC)[1]; \
93 (DST)[2] = (SRC)[2]; \
94} /* while (0)*/
95
96#define COPY_4V( DST, SRC ) \
97/*do */{ \
98 (DST)[0] = (SRC)[0]; \
99 (DST)[1] = (SRC)[1]; \
100 (DST)[2] = (SRC)[2]; \
101 (DST)[3] = (SRC)[3]; \
102} /* while (0)*/
103
104
105#define COPY_2FV( DST, SRC ) \
106/*do*/ { \
107 const GLfloat *_tmp = (SRC); \
108 (DST)[0] = _tmp[0]; \
109 (DST)[1] = _tmp[1]; \
110} /* while (0)*/
111
112
113#define COPY_3FV( DST, SRC ) \
114/*do*/ { \
115 const GLfloat *_tmp = (SRC); \
116 (DST)[0] = _tmp[0]; \
117 (DST)[1] = _tmp[1]; \
118 (DST)[2] = _tmp[2]; \
119} /* while (0)*/
120
121#define COPY_4FV( DST, SRC ) \
122/*do*/ { \
123 const GLfloat *_tmp = (SRC); \
124 (DST)[0] = _tmp[0]; \
125 (DST)[1] = _tmp[1]; \
126 (DST)[2] = _tmp[2]; \
127 (DST)[3] = _tmp[3]; \
128} /* while (0)*/
129
130
131
132#define COPY_SZ_4V(DST, SZ, SRC) \
133/*do */{ \
134 switch (SZ) { \
135 case 4: (DST)[3] = (SRC)[3]; \
136 case 3: (DST)[2] = (SRC)[2]; \
137 case 2: (DST)[1] = (SRC)[1]; \
138 case 1: (DST)[0] = (SRC)[0]; \
139 } \
140} /* while(0)*/
141
142#define SUB_4V( DST, SRCA, SRCB ) \
143/*do */{ \
144 (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
145 (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
146 (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
147 (DST)[3] = (SRCA)[3] - (SRCB)[3]; \
148} /* while (0)*/
149
150#define ADD_4V( DST, SRCA, SRCB ) \
151/*do*/ { \
152 (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
153 (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
154 (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
155 (DST)[3] = (SRCA)[3] + (SRCB)[3]; \
156} /* while (0)*/
157
158#define SCALE_4V( DST, SRCA, SRCB ) \
159/*do*/ { \
160 (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
161 (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
162 (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
163 (DST)[3] = (SRCA)[3] * (SRCB)[3]; \
164} /* while (0)*/
165
166#define ACC_4V( DST, SRC ) \
167/*do*/ { \
168 (DST)[0] += (SRC)[0]; \
169 (DST)[1] += (SRC)[1]; \
170 (DST)[2] += (SRC)[2]; \
171 (DST)[3] += (SRC)[3]; \
172} /* while (0)*/
173
174#define ACC_SCALE_4V( DST, SRCA, SRCB ) \
175/*do*/ { \
176 (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
177 (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
178 (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
179 (DST)[3] += (SRCA)[3] * (SRCB)[3]; \
180} /* while (0)*/
181
182#define ACC_SCALE_SCALAR_4V( DST, S, SRCB ) \
183/*do*/ { \
184 (DST)[0] += S * (SRCB)[0]; \
185 (DST)[1] += S * (SRCB)[1]; \
186 (DST)[2] += S * (SRCB)[2]; \
187 (DST)[3] += S * (SRCB)[3]; \
188} /* while (0)*/
189
190#define SCALE_SCALAR_4V( DST, S, SRCB ) \
191/*do*/ { \
192 (DST)[0] = S * (SRCB)[0]; \
193 (DST)[1] = S * (SRCB)[1]; \
194 (DST)[2] = S * (SRCB)[2]; \
195 (DST)[3] = S * (SRCB)[3]; \
196} /* while (0)*/
197
198
199#define SELF_SCALE_SCALAR_4V( DST, S ) \
200/*do*/ { \
201 (DST)[0] *= S; \
202 (DST)[1] *= S; \
203 (DST)[2] *= S; \
204 (DST)[3] *= S; \
205} /* while (0)*/
206
207
208/*
209 * Similarly for 3-vectors.
210 */
211#define SUB_3V( DST, SRCA, SRCB ) \
212/*do*/ { \
213 (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
214 (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
215 (DST)[2] = (SRCA)[2] - (SRCB)[2]; \
216} /* while (0)*/
217
218#define ADD_3V( DST, SRCA, SRCB ) \
219/*do*/ { \
220 (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
221 (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
222 (DST)[2] = (SRCA)[2] + (SRCB)[2]; \
223} /* while (0)*/
224
225#define SCALE_3V( DST, SRCA, SRCB ) \
226/*do*/ { \
227 (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
228 (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
229 (DST)[2] = (SRCA)[2] * (SRCB)[2]; \
230} /* while (0)*/
231
232#define ACC_3V( DST, SRC ) \
233/*do*/ { \
234 (DST)[0] += (SRC)[0]; \
235 (DST)[1] += (SRC)[1]; \
236 (DST)[2] += (SRC)[2]; \
237} /* while (0)*/
238
239#define ACC_SCALE_3V( DST, SRCA, SRCB ) \
240/*do*/ { \
241 (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
242 (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
243 (DST)[2] += (SRCA)[2] * (SRCB)[2]; \
244} /* while (0)*/
245
246#define SCALE_SCALAR_3V( DST, S, SRCB ) \
247/*do*/ { \
248 (DST)[0] = S * (SRCB)[0]; \
249 (DST)[1] = S * (SRCB)[1]; \
250 (DST)[2] = S * (SRCB)[2]; \
251} /* while (0)*/
252
253#define ACC_SCALE_SCALAR_3V( DST, S, SRCB ) \
254/*do*/ { \
255 (DST)[0] += S * (SRCB)[0]; \
256 (DST)[1] += S * (SRCB)[1]; \
257 (DST)[2] += S * (SRCB)[2]; \
258} /* while (0)*/
259
260#define SELF_SCALE_SCALAR_3V( DST, S ) \
261/*do*/ { \
262 (DST)[0] *= S; \
263 (DST)[1] *= S; \
264 (DST)[2] *= S; \
265} /* while (0)*/
266
267#define ACC_SCALAR_3V( DST, S ) \
268/*do*/ { \
269 (DST)[0] += S; \
270 (DST)[1] += S; \
271 (DST)[2] += S; \
272} /* while (0)*/
273
274/* And also for 2-vectors
275 */
276#define SUB_2V( DST, SRCA, SRCB ) \
277/*do*/ { \
278 (DST)[0] = (SRCA)[0] - (SRCB)[0]; \
279 (DST)[1] = (SRCA)[1] - (SRCB)[1]; \
280} /* while (0)*/
281
282#define ADD_2V( DST, SRCA, SRCB ) \
283/*do*/ { \
284 (DST)[0] = (SRCA)[0] + (SRCB)[0]; \
285 (DST)[1] = (SRCA)[1] + (SRCB)[1]; \
286} /* while (0)*/
287
288#define SCALE_2V( DST, SRCA, SRCB ) \
289/*do*/ { \
290 (DST)[0] = (SRCA)[0] * (SRCB)[0]; \
291 (DST)[1] = (SRCA)[1] * (SRCB)[1]; \
292} /* while (0)*/
293
294#define ACC_2V( DST, SRC ) \
295/*do*/ { \
296 (DST)[0] += (SRC)[0]; \
297 (DST)[1] += (SRC)[1]; \
298} /* while (0)*/
299
300#define ACC_SCALE_2V( DST, SRCA, SRCB ) \
301/*do*/ { \
302 (DST)[0] += (SRCA)[0] * (SRCB)[0]; \
303 (DST)[1] += (SRCA)[1] * (SRCB)[1]; \
304} /* while (0)*/
305
306#define SCALE_SCALAR_2V( DST, S, SRCB ) \
307/*do*/ { \
308 (DST)[0] = S * (SRCB)[0]; \
309 (DST)[1] = S * (SRCB)[1]; \
310} /* while (0)*/
311
312#define ACC_SCALE_SCALAR_2V( DST, S, SRCB ) \
313/*do*/ { \
314 (DST)[0] += S * (SRCB)[0]; \
315 (DST)[1] += S * (SRCB)[1]; \
316} /* while (0)*/
317
318#define SELF_SCALE_SCALAR_2V( DST, S ) \
319/*do*/ { \
320 (DST)[0] *= S; \
321 (DST)[1] *= S; \
322} /* while (0)*/
323
324#define ACC_SCALAR_2V( DST, S ) \
325/*do*/ { \
326 (DST)[0] += S; \
327 (DST)[1] += S; \
328} /* while (0)*/
329
330
331
332/*
333 * Copy a vector of 4 GLubytes from SRC to DST.
334 */
335#define COPY_4UBV(DST, SRC) \
336/*do*/ { \
337 if (sizeof(GLuint)==4*sizeof(GLubyte)) { \
338 *((GLuint*)(DST)) = *((GLuint*)(SRC)); \
339 } \
340 else { \
341 (DST)[0] = (SRC)[0]; \
342 (DST)[1] = (SRC)[1]; \
343 (DST)[2] = (SRC)[2]; \
344 (DST)[3] = (SRC)[3]; \
345 } \
346} /* while (0)*/
347
348
349/* Assign scalers to short vectors: */
350#define ASSIGN_2V( V, V0, V1 ) \
351/*do*/ { V[0] = V0; V[1] = V1; } //while(0)
352
353#define ASSIGN_3V( V, V0, V1, V2 ) \
354/*do*/ { V[0] = V0; V[1] = V1; V[2] = V2; } //while(0)
355
356#define ASSIGN_4V( V, V0, V1, V2, V3 ) \
357/*do*/ { \
358 V[0] = V0; \
359 V[1] = V1; \
360 V[2] = V2; \
361 V[3] = V3; \
362} /* while(0)*/
363
364
365
366
367/* Absolute value (for Int, Float, Double): */
368#define ABSI(X) ((X) < 0 ? -(X) : (X))
369#define ABSF(X) ((X) < 0.0F ? -(X) : (X))
370#define ABSD(X) ((X) < 0.0 ? -(X) : (X))
371
372
373
374/* Round a floating-point value to the nearest integer: */
375#define ROUNDF(X) ( (X)<0.0F ? ((GLint) ((X)-0.5F)) : ((GLint) ((X)+0.5F)) )
376
377
378/* Compute ceiling of integer quotient of A divided by B: */
379#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
380
381
382/* Clamp X to [MIN,MAX]: */
383#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
384
385/* Assign X to CLAMP(X, MIN, MAX) */
386#define CLAMP_SELF(x, mn, mx) \
387 ( (x)<(mn) ? ((x) = (mn)) : ((x)>(mx) ? ((x)=(mx)) : (x)) )
388
389
390
391/* Min of two values: */
392#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
393
394
395/* MAX of two values: */
396#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
397
398/* Dot product of two 2-element vectors */
399#define DOT2( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] )
400
401/* Dot product of two 3-element vectors */
402#define DOT3( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2] )
403
404
405/* Dot product of two 4-element vectors */
406#define DOT4( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + \
407 (a)[2]*(b)[2] + (a)[3]*(b)[3] )
408
409#define DOT4V(v,a,b,c,d) (v[0]*a + v[1]*b + v[2]*c + v[3]*d)
410
411
412#define CROSS3(n, u, v) \
413do { \
414 (n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
415 (n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
416 (n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]; \
417} while (0)
418
419
420/*
421 * Integer / float conversion for colors, normals, etc.
422 */
423
424
425
426
427#define BYTE_TO_UBYTE(b) (b < 0 ? 0 : (GLubyte) b)
428#define SHORT_TO_UBYTE(s) (s < 0 ? 0 : (GLubyte) (s >> 7))
429#define USHORT_TO_UBYTE(s) (GLubyte) (s >> 8)
430#define INT_TO_UBYTE(i) (i < 0 ? 0 : (GLubyte) (i >> 23))
431#define UINT_TO_UBYTE(i) (GLubyte) (i >> 24)
432
433
434
435
436/* Convert GLubyte in [0,255] to GLfloat in [0.0,1.0] */
437#define UBYTE_TO_FLOAT(B) ((GLfloat) (B) * (1.0F / 255.0F))
438
439/* Convert GLfloat in [0.0,1.0] to GLubyte in [0,255] */
440#define FLOAT_TO_UBYTE(X) ((GLubyte) (GLint) (((X)) * 255.0F))
441
442
443/* Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0] */
444#define BYTE_TO_FLOAT(B) ((2.0F * (B) + 1.0F) * (1.0F/255.0F))
445
446/* Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127] */
447#define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 )
448
449
450/* Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */
451#define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F))
452
453/* Convert GLfloat in [0.0,1.0] to GLushort in [0,65536] */
454#define FLOAT_TO_USHORT(X) ((GLushort) (GLint) ((X) * 65535.0F))
455
456
457/* Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */
458#define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
459
460/* Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */
461#define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 )
462
463
464/* Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */
465#define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0F))
466
467/* Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295] */
468#define FLOAT_TO_UINT(X) ((GLuint) ((X) * 4294967295.0))
469
470
471/* Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0] */
472#define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0F))
473
474/* Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */
475/* causes overflow:
476#define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0F * (X))) - 1) / 2 )
477*/
478/* a close approximation: */
479#define FLOAT_TO_INT(X) ( (GLint) (2147483647.0 * (X)) )
480
481
482
483/*
484 * Memory allocation
485 * XXX these should probably go into a new glmemory.h file.
486 */
487#ifdef DEBUG
488extern void *gl_malloc(size_t bytes);
489extern void *gl_calloc(size_t bytes);
490extern void gl_free(void *ptr);
491#define MALLOC(BYTES) gl_malloc(BYTES)
492#define CALLOC(BYTES) gl_calloc(BYTES)
493#define MALLOC_STRUCT(T) (struct T *) gl_malloc(sizeof(struct T))
494#define CALLOC_STRUCT(T) (struct T *) gl_calloc(sizeof(struct T))
495#define FREE(PTR) gl_free(PTR)
496#else
497#define MALLOC(BYTES) (void *) malloc(BYTES)
498#define CALLOC(BYTES) (void *) calloc(1, BYTES)
499#define MALLOC_STRUCT(T) (struct T *) malloc(sizeof(struct T))
500#define CALLOC_STRUCT(T) (struct T *) calloc(1,sizeof(struct T))
501#define FREE(PTR) free(PTR)
502#endif
503
504
505/* Memory copy: */
506#ifdef SUNOS4
507#define MEMCPY( DST, SRC, BYTES) \
508 memcpy( (char *) (DST), (char *) (SRC), (int) (BYTES) )
509#else
510#define MEMCPY( DST, SRC, BYTES) \
511 memcpy( (void *) (DST), (void *) (SRC), (size_t) (BYTES) )
512#endif
513
514
515/* Memory set: */
516#ifdef SUNOS4
517#define MEMSET( DST, VAL, N ) \
518 memset( (char *) (DST), (int) (VAL), (int) (N) )
519#else
520#define MEMSET( DST, VAL, N ) \
521 memset( (void *) (DST), (int) (VAL), (size_t) (N) )
522#endif
523
524
525/* MACs and BeOS don't support static larger than 32kb, so... */
526#if defined(macintosh) && !defined(__MRC__)
527 extern char *AGLAlloc(int size);
528 extern void AGLFree(char* ptr);
529# define DEFARRAY(TYPE,NAME,SIZE) TYPE *NAME = (TYPE*)AGLAlloc(sizeof(TYPE)*(SIZE))
530# define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2) TYPE (*NAME)[SIZE2] = (TYPE(*)[SIZE2])AGLAlloc(sizeof(TYPE)*(SIZE1)*(SIZE2))
531# define CHECKARRAY(NAME,CMD) do {if (!(NAME)) {CMD;}} while (0)
532# define UNDEFARRAY(NAME) do {if ((NAME)) {AGLFree((char*)NAME);} }while (0)
533#elif defined(__BEOS__)
534# define DEFARRAY(TYPE,NAME,SIZE) TYPE *NAME = (TYPE*)malloc(sizeof(TYPE)*(SIZE))
535# define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2) TYPE (*NAME)[SIZE2] = (TYPE(*)[SIZE2])malloc(sizeof(TYPE)*(SIZE1)*(SIZE2))
536# define CHECKARRAY(NAME,CMD) do {if (!(NAME)) {CMD;}} while (0)
537# define UNDEFARRAY(NAME) do {if ((NAME)) {free((char*)NAME);} }while (0)
538#else
539# define DEFARRAY(TYPE,NAME,SIZE) TYPE NAME[SIZE]
540# define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2) TYPE NAME[SIZE1][SIZE2]
541# define CHECKARRAY(NAME,CMD) do {} while(0)
542# define UNDEFARRAY(NAME)
543#endif
544
545
546/* Some compilers don't like some of Mesa's const usage */
547#ifdef NO_CONST
548# define CONST
549#else
550# define CONST const
551#endif
552
553
554
555/* Pi */
556#ifndef M_PI
557#define M_PI (3.1415926)
558#endif
559
560
561/* Degrees to radians conversion: */
562#define DEG2RAD (M_PI/180.0)
563
564
565#ifndef NULL
566#define NULL 0
567#endif
568
569
570
571#endif /*MACROS_H*/
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