summaryrefslogtreecommitdiffstats
path: root/src/mesa/shader/prog_parameter.c
blob: 505c5016ac2ff9826bfada30868d737d45a2da90 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
/*
 * Mesa 3-D graphics library
 * Version:  6.5.3
 *
 * Copyright (C) 1999-2007  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 prog_parameter.c
 * Program parameter lists and functions.
 * \author Brian Paul
 */


#include "glheader.h"
#include "imports.h"
#include "macros.h"
#include "prog_instruction.h"
#include "prog_parameter.h"
#include "prog_statevars.h"


struct gl_program_parameter_list *
_mesa_new_parameter_list(void)
{
   return (struct gl_program_parameter_list *)
      _mesa_calloc(sizeof(struct gl_program_parameter_list));
}


/**
 * Free a parameter list and all its parameters
 */
void
_mesa_free_parameter_list(struct gl_program_parameter_list *paramList)
{
   GLuint i;
   for (i = 0; i < paramList->NumParameters; i++) {
      if (paramList->Parameters[i].Name)
	 _mesa_free((void *) paramList->Parameters[i].Name);
   }
   _mesa_free(paramList->Parameters);
   if (paramList->ParameterValues)
      _mesa_align_free(paramList->ParameterValues);
   _mesa_free(paramList);
}



/**
 * Add a new parameter to a parameter list.
 * Note that parameter values are usually 4-element GLfloat vectors.
 * When size > 4 we'll allocate a sequential block of parameters to
 * store all the values (in blocks of 4).
 *
 * \param paramList  the list to add the parameter to
 * \param type  type of parameter, such as 
 * \param name  the parameter name, will be duplicated/copied!
 * \param size  number of elements in 'values' vector (1..4, or more)
 * \param values  initial parameter value, up to 4 GLfloats, or NULL
 * \param state  state indexes, or NULL
 * \return  index of new parameter in the list, or -1 if error (out of mem)
 */
GLint
_mesa_add_parameter(struct gl_program_parameter_list *paramList,
                    enum register_file type, const char *name,
                    GLuint size, const GLfloat *values,
                    const gl_state_index state[STATE_LENGTH])
{
   const GLuint oldNum = paramList->NumParameters;
   const GLuint sz4 = (size + 3) / 4; /* no. of new param slots needed */

   assert(size > 0);
   assert(size <= 16);  /* XXX anything larger than a matrix??? */

   if (oldNum + sz4 > paramList->Size) {
      /* Need to grow the parameter list array (alloc some extra) */
      paramList->Size = paramList->Size + 4 * sz4;

      /* realloc arrays */
      paramList->Parameters = (struct gl_program_parameter *)
	 _mesa_realloc(paramList->Parameters,
		       oldNum * sizeof(struct gl_program_parameter),
		       paramList->Size * sizeof(struct gl_program_parameter));

      paramList->ParameterValues = (GLfloat (*)[4])
         _mesa_align_realloc(paramList->ParameterValues,         /* old buf */
                             oldNum * 4 * sizeof(GLfloat),      /* old size */
                             paramList->Size * 4 *sizeof(GLfloat), /* new sz */
                             16);
   }

   if (!paramList->Parameters ||
       !paramList->ParameterValues) {
      /* out of memory */
      paramList->NumParameters = 0;
      paramList->Size = 0;
      return -1;
   }
   else {
      GLuint i;

      paramList->NumParameters = oldNum + sz4;

      _mesa_memset(&paramList->Parameters[oldNum], 0, 
		   sz4 * sizeof(struct gl_program_parameter));

      for (i = 0; i < sz4; i++) {
         struct gl_program_parameter *p = paramList->Parameters + oldNum + i;
         p->Name = name ? _mesa_strdup(name) : NULL;
         p->Type = type;
         p->Size = size;
         if (values) {
            COPY_4V(paramList->ParameterValues[oldNum + i], values);
            values += 4;
         }
         else {
            /* silence valgrind */
            ASSIGN_4V(paramList->ParameterValues[oldNum + i], 0, 0, 0, 0);
         }
         size -= 4;
      }

      if (state) {
         for (i = 0; i < STATE_LENGTH; i++)
            paramList->Parameters[oldNum].StateIndexes[i] = state[i];
      }

      return (GLint) oldNum;
   }
}


/**
 * Add a new named program parameter (Ex: NV_fragment_program DEFINE statement)
 * \return index of the new entry in the parameter list
 */
GLint
_mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
                          const char *name, const GLfloat values[4])
{
   return _mesa_add_parameter(paramList, PROGRAM_NAMED_PARAM, name,
                              4, values, NULL);
                              
}


/**
 * Add a new named constant to the parameter list.
 * This will be used when the program contains something like this:
 *    PARAM myVals = { 0, 1, 2, 3 };
 *
 * \param paramList  the parameter list
 * \param name  the name for the constant
 * \param values  four float values
 * \return index/position of the new parameter in the parameter list
 */
GLint
_mesa_add_named_constant(struct gl_program_parameter_list *paramList,
                         const char *name, const GLfloat values[4],
                         GLuint size)
{
#if 0 /* disable this for now -- we need to save the name! */
   GLint pos;
   GLuint swizzle;
   ASSERT(size == 4); /* XXX future feature */
   /* check if we already have this constant */
   if (_mesa_lookup_parameter_constant(paramList, values, 4, &pos, &swizzle)) {
      return pos;
   }
#endif
   size = 4; /** XXX fix */
   return _mesa_add_parameter(paramList, PROGRAM_CONSTANT, name,
                              size, values, NULL);
}


/**
 * Add a new unnamed constant to the parameter list.
 * This will be used when the program contains something like this:
 *    MOV r, { 0, 1, 2, 3 };
 *
 * \param paramList  the parameter list
 * \param values  four float values
 * \param swizzleOut  returns swizzle mask for accessing the constant
 * \return index/position of the new parameter in the parameter list.
 */
GLint
_mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
                           const GLfloat values[4], GLuint size,
                           GLuint *swizzleOut)
{
   GLint pos;
   ASSERT(size >= 1);
   ASSERT(size <= 4);

   if (_mesa_lookup_parameter_constant(paramList, values,
                                       size, &pos, swizzleOut)) {
      return pos;
   }

   /* Look for empty space in an already unnamed constant parameter
    * to add this constant.  This will only work for single-element
    * constants because we rely on smearing (i.e. .yyyy or .zzzz).
    */
   if (size == 1) {
      for (pos = 0; pos < (GLint) paramList->NumParameters; pos++) {
         struct gl_program_parameter *p = paramList->Parameters + pos;
         if (p->Type == PROGRAM_CONSTANT && p->Size + size <= 4) {
            /* ok, found room */
            GLfloat *pVal = paramList->ParameterValues[pos];
            GLuint swz = p->Size; /* 1, 2 or 3 for Y, Z, W */
            pVal[p->Size] = values[0];
            p->Size++;
            *swizzleOut = MAKE_SWIZZLE4(swz, swz, swz, swz);
            return pos;
         }
      }
   }

   /* add a new parameter to store this constant */
   pos = _mesa_add_parameter(paramList, PROGRAM_CONSTANT, NULL,
                             size, values, NULL);
   if (pos >= 0) {
      if (size == 1)
         *swizzleOut = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X,
                                     SWIZZLE_X, SWIZZLE_X);
      else
         *swizzleOut = SWIZZLE_NOOP;
   }
   return pos;
}


GLint
_mesa_add_uniform(struct gl_program_parameter_list *paramList,
                  const char *name, GLuint size)
{
   GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
   if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_UNIFORM) {
      /* already in list */
      return i;
   }
   else {
      i = _mesa_add_parameter(paramList, PROGRAM_UNIFORM, name,
                              size, NULL, NULL);
                              
      return i;
   }
}


GLint
_mesa_add_sampler(struct gl_program_parameter_list *paramList,
                  const char *name)
{
   GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
   if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_SAMPLER) {
      /* already in list */
      return i;
   }
   else {
      const GLint size = 1;
      i = _mesa_add_parameter(paramList, PROGRAM_SAMPLER, name,
                              size, NULL, NULL);
      return i;
   }
}


/**
 * Add parameter representing a varying variable.
 */
GLint
_mesa_add_varying(struct gl_program_parameter_list *paramList,
                  const char *name, GLuint size)
{
   GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
   if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_VARYING) {
      /* already in list */
      return i;
   }
   else {
      assert(size == 4);
      i = _mesa_add_parameter(paramList, PROGRAM_VARYING, name,
                              size, NULL, NULL);
      return i;
   }
}


/**
 * Add parameter representing a vertex program attribute.
 * \param size  size of attribute (in floats), may be -1 if unknown
 * \param attrib  the attribute index, or -1 if unknown
 */
GLint
_mesa_add_attribute(struct gl_program_parameter_list *paramList,
                    const char *name, GLint size, GLint attrib)
{
   GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
   if (i >= 0) {
      /* replace */
      if (attrib < 0)
         attrib = i;
      paramList->Parameters[i].StateIndexes[0] = attrib;
   }
   else {
      /* add */
      gl_state_index state[STATE_LENGTH];
      state[0] = (gl_state_index) attrib;
      if (size < 0)
         size = 4;
      i = _mesa_add_parameter(paramList, PROGRAM_INPUT, name,
                              size, NULL, state);
   }
   return i;
}



#if 0 /* not used yet */
/**
 * Returns the number of 4-component registers needed to store a piece
 * of GL state.  For matrices this may be as many as 4 registers,
 * everything else needs
 * just 1 register.
 */
static GLuint
sizeof_state_reference(const GLint *stateTokens)
{
   if (stateTokens[0] == STATE_MATRIX) {
      GLuint rows = stateTokens[4] - stateTokens[3] + 1;
      assert(rows >= 1);
      assert(rows <= 4);
      return rows;
   }
   else {
      return 1;
   }
}
#endif


/**
 * Add a new state reference to the parameter list.
 * This will be used when the program contains something like this:
 *    PARAM ambient = state.material.front.ambient;
 *
 * \param paramList  the parameter list
 * \param state  an array of 6 (STATE_LENGTH) state tokens
 * \return index of the new parameter.
 */
GLint
_mesa_add_state_reference(struct gl_program_parameter_list *paramList,
                          const GLint stateTokens[STATE_LENGTH])
{
   const GLuint size = 4; /* XXX fix */
   const char *name;
   GLint index;

   /* Check if the state reference is already in the list */
   for (index = 0; index < (GLint) paramList->NumParameters; index++) {
      GLuint i, match = 0;
      for (i = 0; i < STATE_LENGTH; i++) {
         if (paramList->Parameters[index].StateIndexes[i] == stateTokens[i]) {
            match++;
         }
         else {
            break;
         }
      }
      if (match == STATE_LENGTH) {
         /* this state reference is already in the parameter list */
         return index;
      }
   }

   name = _mesa_program_state_string(stateTokens);
   index = _mesa_add_parameter(paramList, PROGRAM_STATE_VAR, name,
                               size, NULL, (gl_state_index *) stateTokens);
   paramList->StateFlags |= _mesa_program_state_flags(stateTokens);

   /* free name string here since we duplicated it in add_parameter() */
   _mesa_free((void *) name);

   return index;
}


/**
 * Lookup a parameter value by name in the given parameter list.
 * \return pointer to the float[4] values.
 */
GLfloat *
_mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
                             GLsizei nameLen, const char *name)
{
   GLuint i = _mesa_lookup_parameter_index(paramList, nameLen, name);
   if (i < 0)
      return NULL;
   else
      return paramList->ParameterValues[i];
}


/**
 * Given a program parameter name, find its position in the list of parameters.
 * \param paramList  the parameter list to search
 * \param nameLen  length of name (in chars).
 *                 If length is negative, assume that name is null-terminated.
 * \param name  the name to search for
 * \return index of parameter in the list.
 */
GLint
_mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
                             GLsizei nameLen, const char *name)
{
   GLint i;

   if (!paramList)
      return -1;

   if (nameLen == -1) {
      /* name is null-terminated */
      for (i = 0; i < (GLint) paramList->NumParameters; i++) {
         if (paramList->Parameters[i].Name &&
	     _mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
            return i;
      }
   }
   else {
      /* name is not null-terminated, use nameLen */
      for (i = 0; i < (GLint) paramList->NumParameters; i++) {
         if (paramList->Parameters[i].Name &&
	     _mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
             && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
            return i;
      }
   }
   return -1;
}


/**
 * Look for a float vector in the given parameter list.  The float vector
 * may be of length 1, 2, 3 or 4.
 * \param list  the parameter list to search
 * \param v  the float vector to search for
 * \param size  number of element in v
 * \param posOut  returns the position of the constant, if found
 * \param swizzleOut  returns a swizzle mask describing location of the
 *                    vector elements if found
 * \return GL_TRUE if found, GL_FALSE if not found
 */
GLboolean
_mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
                                const GLfloat v[], GLuint vSize,
                                GLint *posOut, GLuint *swizzleOut)
{
   GLuint i;

   assert(vSize >= 1);
   assert(vSize <= 4);

   if (!list)
      return -1;

   for (i = 0; i < list->NumParameters; i++) {
      if (list->Parameters[i].Type == PROGRAM_CONSTANT) {
         if (vSize == 1) {
            /* look for v[0] anywhere within float[4] value */
            GLuint j;
            for (j = 0; j < 4; j++) {
               if (list->ParameterValues[i][j] == v[0]) {
                  /* found it */
                  *posOut = i;
                  *swizzleOut = MAKE_SWIZZLE4(j, j, j, j);
                  return GL_TRUE;
               }
            }
         }
         else if (vSize <= list->Parameters[i].Size) {
            /* see if we can match this constant (with a swizzle) */
            GLuint swz[4];
            GLuint match = 0, j, k;
            for (j = 0; j < vSize; j++) {
               if (v[j] == list->ParameterValues[i][j]) {
                  swz[j] = j;
                  match++;
               }
               else {
                  for (k = 0; k < list->Parameters[i].Size; k++) {
                     if (v[j] == list->ParameterValues[i][k]) {
                        swz[j] = k;
                        match++;
                        break;
                     }
                  }
               }
            }
            if (match == vSize) {
               *posOut = i;
               *swizzleOut = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
               return GL_TRUE;
            }
         }
      }
   }

   *posOut = -1;
   return GL_FALSE;
}


struct gl_program_parameter_list *
_mesa_clone_parameter_list(const struct gl_program_parameter_list *list)
{
   struct gl_program_parameter_list *clone;
   GLuint i;

   clone = _mesa_new_parameter_list();
   if (!clone)
      return NULL;

   /** Not too efficient, but correct */
   for (i = 0; i < list->NumParameters; i++) {
      struct gl_program_parameter *p = list->Parameters + i;
      GLuint size = MIN2(p->Size, 4);
      GLint j = _mesa_add_parameter(clone, p->Type, p->Name,
                                    size, list->ParameterValues[i], NULL);
      ASSERT(j >= 0);
      /* copy state indexes */
      if (p->Type == PROGRAM_STATE_VAR) {
         GLint k;
         struct gl_program_parameter *q = clone->Parameters + j;
         for (k = 0; k < STATE_LENGTH; k++) {
            q->StateIndexes[k] = p->StateIndexes[k];
         }
      }
      else {
         clone->Parameters[j].Size = p->Size;
      }
   }

   return clone;
}


/**
 * Find longest name of any parameter in list.
 */
GLuint
_mesa_parameter_longest_name(const struct gl_program_parameter_list *list)
{
   GLuint i, maxLen = 0;
   if (!list)
      return 0;
   for (i = 0; i < list->NumParameters; i++) {
      GLuint len = _mesa_strlen(list->Parameters[i].Name);
      if (len > maxLen)
         maxLen = len;
   }
   return maxLen;
}