src/mesa/program/prog_parameter.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.3
   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  * THE AUTHORS 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  * \file prog_parameter.c
  27  * Program parameter lists and functions.
  28  * \author Brian Paul
  29  */
  30
  31
  32 #include "main/glheader.h"
  33 #include "main/imports.h"
  34 #include "main/macros.h"
  35 #include "prog_instruction.h"
  36 #include "prog_parameter.h"
  37 #include "prog_statevars.h"
  38
  39
  40 struct gl_program_parameter_list *
  41 _mesa_new_parameter_list(void)
  42 {
  43    return CALLOC_STRUCT(gl_program_parameter_list);
  44 }
  45
  46
  47 struct gl_program_parameter_list *
  48 _mesa_new_parameter_list_sized(unsigned size)
  49 {
  50    struct gl_program_parameter_list *p = _mesa_new_parameter_list();
  51
  52    if ((p != NULL) && (size != 0)) {
  53       p->Size = size;
  54
  55       /* alloc arrays */
  56       p->Parameters = (struct gl_program_parameter *)
  57          calloc(1, size * sizeof(struct gl_program_parameter));
  58
  59       p->ParameterValues = (gl_constant_value (*)[4])
  60          _mesa_align_malloc(size * 4 *sizeof(gl_constant_value), 16);
  61
  62
  63       if ((p->Parameters == NULL) || (p->ParameterValues == NULL)) {
  64          free(p->Parameters);
  65          _mesa_align_free(p->ParameterValues);
  66          free(p);
  67          p = NULL;
  68       }
  69    }
  70
  71    return p;
  72 }
  73
  74
  75 /**
  76  * Free a parameter list and all its parameters
  77  */
  78 void
  79 _mesa_free_parameter_list(struct gl_program_parameter_list *paramList)
  80 {
  81    GLuint i;
  82    for (i = 0; i < paramList->NumParameters; i++) {
  83       free((void *)paramList->Parameters[i].Name);
  84    }
  85    free(paramList->Parameters);
  86    if (paramList->ParameterValues)
  87       _mesa_align_free(paramList->ParameterValues);
  88    free(paramList);
  89 }
  90
  91
  92 /**
  93  * Add a new parameter to a parameter list.
  94  * Note that parameter values are usually 4-element GLfloat vectors.
  95  * When size > 4 we'll allocate a sequential block of parameters to
  96  * store all the values (in blocks of 4).
  97  *
  98  * \param paramList  the list to add the parameter to
  99  * \param type  type of parameter, such as
 100  * \param name  the parameter name, will be duplicated/copied!
 101  * \param size  number of elements in 'values' vector (1..4, or more)
 102  * \param datatype  GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
 103  * \param values  initial parameter value, up to 4 gl_constant_values, or NULL
 104  * \param state  state indexes, or NULL
 105  * \return  index of new parameter in the list, or -1 if error (out of mem)
 106  */
 107 GLint
 108 _mesa_add_parameter(struct gl_program_parameter_list *paramList,
 109                     gl_register_file type, const char *name,
 110                     GLuint size, GLenum datatype,
 111                     const gl_constant_value *values,
 112                     const gl_state_index state[STATE_LENGTH])
 113 {
 114    const GLuint oldNum = paramList->NumParameters;
 115    const GLuint sz4 = (size + 3) / 4; /* no. of new param slots needed */
 116
 117    assert(size > 0);
 118
 119    if (oldNum + sz4 > paramList->Size) {
 120       /* Need to grow the parameter list array (alloc some extra) */
 121       paramList->Size = paramList->Size + 4 * sz4;
 122
 123       /* realloc arrays */
 124       paramList->Parameters = (struct gl_program_parameter *)
 125          _mesa_realloc(paramList->Parameters,
 126                        oldNum * sizeof(struct gl_program_parameter),
 127                        paramList->Size * sizeof(struct gl_program_parameter));
 128
 129       paramList->ParameterValues = (gl_constant_value (*)[4])
 130          _mesa_align_realloc(paramList->ParameterValues,         /* old buf */
 131                              oldNum * 4 * sizeof(gl_constant_value),/* old sz */
 132                              paramList->Size*4*sizeof(gl_constant_value),/*new*/
 133                              16);
 134    }
 135
 136    if (!paramList->Parameters ||
 137        !paramList->ParameterValues) {
 138       /* out of memory */
 139       paramList->NumParameters = 0;
 140       paramList->Size = 0;
 141       return -1;
 142    }
 143    else {
 144       GLuint i, j;
 145
 146       paramList->NumParameters = oldNum + sz4;
 147
 148       memset(&paramList->Parameters[oldNum], 0,
 149              sz4 * sizeof(struct gl_program_parameter));
 150
 151       for (i = 0; i < sz4; i++) {
 152          struct gl_program_parameter *p = paramList->Parameters + oldNum + i;
 153          p->Name = name ? _mesa_strdup(name) : NULL;
 154          p->Type = type;
 155          p->Size = size;
 156          p->DataType = datatype;
 157          if (values) {
 158             COPY_4V(paramList->ParameterValues[oldNum + i], values);
 159             values += 4;
 160             p->Initialized = GL_TRUE;
 161          }
 162          else {
 163             /* silence valgrind */
 164             for (j = 0; j < 4; j++)
 165                 paramList->ParameterValues[oldNum + i][j].f = 0;
 166          }
 167          size -= 4;
 168       }
 169
 170       if (state) {
 171          for (i = 0; i < STATE_LENGTH; i++)
 172             paramList->Parameters[oldNum].StateIndexes[i] = state[i];
 173       }
 174
 175       return (GLint) oldNum;
 176    }
 177 }
 178
 179
 180 /**
 181  * Add a new named constant to the parameter list.
 182  * This will be used when the program contains something like this:
 183  *    PARAM myVals = { 0, 1, 2, 3 };
 184  *
 185  * \param paramList  the parameter list
 186  * \param name  the name for the constant
 187  * \param values  four float values
 188  * \return index/position of the new parameter in the parameter list
 189  */
 190 GLint
 191 _mesa_add_named_constant(struct gl_program_parameter_list *paramList,
 192                          const char *name, const gl_constant_value values[4],
 193                          GLuint size)
 194 {
 195    /* first check if this is a duplicate constant */
 196    GLint pos;
 197    for (pos = 0; pos < (GLint)paramList->NumParameters; pos++) {
 198       const gl_constant_value *pvals = paramList->ParameterValues[pos];
 199       if (pvals[0].u == values[0].u &&
 200           pvals[1].u == values[1].u &&
 201           pvals[2].u == values[2].u &&
 202           pvals[3].u == values[3].u &&
 203           strcmp(paramList->Parameters[pos].Name, name) == 0) {
 204          /* Same name and value is already in the param list - reuse it */
 205          return pos;
 206       }
 207    }
 208    /* not found, add new parameter */
 209    return _mesa_add_parameter(paramList, PROGRAM_CONSTANT, name,
 210                               size, GL_NONE, values, NULL);
 211 }
 212
 213
 214 /**
 215  * Add a new unnamed constant to the parameter list.  This will be used
 216  * when a fragment/vertex program contains something like this:
 217  *    MOV r, { 0, 1, 2, 3 };
 218  * If swizzleOut is non-null we'll search the parameter list for an
 219  * existing instance of the constant which matches with a swizzle.
 220  *
 221  * \param paramList  the parameter list
 222  * \param values  four float values
 223  * \param swizzleOut  returns swizzle mask for accessing the constant
 224  * \return index/position of the new parameter in the parameter list.
 225  */
 226 GLint
 227 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
 228                            const gl_constant_value values[4], GLuint size,
 229                            GLenum datatype, GLuint *swizzleOut)
 230 {
 231    GLint pos;
 232    ASSERT(size >= 1);
 233    ASSERT(size <= 4);
 234
 235    if (swizzleOut &&
 236        _mesa_lookup_parameter_constant(paramList, values,
 237                                        size, &pos, swizzleOut)) {
 238       return pos;
 239    }
 240
 241    /* Look for empty space in an already unnamed constant parameter
 242     * to add this constant.  This will only work for single-element
 243     * constants because we rely on smearing (i.e. .yyyy or .zzzz).
 244     */
 245    if (size == 1 && swizzleOut) {
 246       for (pos = 0; pos < (GLint) paramList->NumParameters; pos++) {
 247          struct gl_program_parameter *p = paramList->Parameters + pos;
 248          if (p->Type == PROGRAM_CONSTANT && p->Size + size <= 4) {
 249             /* ok, found room */
 250             gl_constant_value *pVal = paramList->ParameterValues[pos];
 251             GLuint swz = p->Size; /* 1, 2 or 3 for Y, Z, W */
 252             pVal[p->Size] = values[0];
 253             p->Size++;
 254             *swizzleOut = MAKE_SWIZZLE4(swz, swz, swz, swz);
 255             return pos;
 256          }
 257       }
 258    }
 259
 260    /* add a new parameter to store this constant */
 261    pos = _mesa_add_parameter(paramList, PROGRAM_CONSTANT, NULL,
 262                              size, datatype, values, NULL);
 263    if (pos >= 0 && swizzleOut) {
 264       if (size == 1)
 265          *swizzleOut = SWIZZLE_XXXX;
 266       else
 267          *swizzleOut = SWIZZLE_NOOP;
 268    }
 269    return pos;
 270 }
 271
 272 /**
 273  * Add a new unnamed constant to the parameter list.  This will be used
 274  * when a fragment/vertex program contains something like this:
 275  *    MOV r, { 0, 1, 2, 3 };
 276  * If swizzleOut is non-null we'll search the parameter list for an
 277  * existing instance of the constant which matches with a swizzle.
 278  *
 279  * \param paramList  the parameter list
 280  * \param values  four float values
 281  * \param swizzleOut  returns swizzle mask for accessing the constant
 282  * \return index/position of the new parameter in the parameter list.
 283  * \sa _mesa_add_typed_unnamed_constant
 284  */
 285 GLint
 286 _mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
 287                            const gl_constant_value values[4], GLuint size,
 288                            GLuint *swizzleOut)
 289 {
 290    return _mesa_add_typed_unnamed_constant(paramList, values, size, GL_NONE,
 291                                            swizzleOut);
 292 }
 293
 294 #if 0 /* not used yet */
 295 /**
 296  * Returns the number of 4-component registers needed to store a piece
 297  * of GL state.  For matrices this may be as many as 4 registers,
 298  * everything else needs
 299  * just 1 register.
 300  */
 301 static GLuint
 302 sizeof_state_reference(const GLint *stateTokens)
 303 {
 304    if (stateTokens[0] == STATE_MATRIX) {
 305       GLuint rows = stateTokens[4] - stateTokens[3] + 1;
 306       assert(rows >= 1);
 307       assert(rows <= 4);
 308       return rows;
 309    }
 310    else {
 311       return 1;
 312    }
 313 }
 314 #endif
 315
 316
 317 /**
 318  * Add a new state reference to the parameter list.
 319  * This will be used when the program contains something like this:
 320  *    PARAM ambient = state.material.front.ambient;
 321  *
 322  * \param paramList  the parameter list
 323  * \param stateTokens  an array of 5 (STATE_LENGTH) state tokens
 324  * \return index of the new parameter.
 325  */
 326 GLint
 327 _mesa_add_state_reference(struct gl_program_parameter_list *paramList,
 328                           const gl_state_index stateTokens[STATE_LENGTH])
 329 {
 330    const GLuint size = 4; /* XXX fix */
 331    char *name;
 332    GLint index;
 333
 334    /* Check if the state reference is already in the list */
 335    for (index = 0; index < (GLint) paramList->NumParameters; index++) {
 336       if (!memcmp(paramList->Parameters[index].StateIndexes,
 337                   stateTokens, STATE_LENGTH * sizeof(gl_state_index))) {
 338          return index;
 339       }
 340    }
 341
 342    name = _mesa_program_state_string(stateTokens);
 343    index = _mesa_add_parameter(paramList, PROGRAM_STATE_VAR, name,
 344                                size, GL_NONE,
 345                                NULL, (gl_state_index *) stateTokens);
 346    paramList->StateFlags |= _mesa_program_state_flags(stateTokens);
 347
 348    /* free name string here since we duplicated it in add_parameter() */
 349    free(name);
 350
 351    return index;
 352 }
 353
 354
 355 /**
 356  * Lookup a parameter value by name in the given parameter list.
 357  * \return pointer to the float[4] values.
 358  */
 359 gl_constant_value *
 360 _mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
 361                              GLsizei nameLen, const char *name)
 362 {
 363    GLint i = _mesa_lookup_parameter_index(paramList, nameLen, name);
 364    if (i < 0)
 365       return NULL;
 366    else
 367       return paramList->ParameterValues[i];
 368 }
 369
 370
 371 /**
 372  * Given a program parameter name, find its position in the list of parameters.
 373  * \param paramList  the parameter list to search
 374  * \param nameLen  length of name (in chars).
 375  *                 If length is negative, assume that name is null-terminated.
 376  * \param name  the name to search for
 377  * \return index of parameter in the list.
 378  */
 379 GLint
 380 _mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
 381                              GLsizei nameLen, const char *name)
 382 {
 383    GLint i;
 384
 385    if (!paramList)
 386       return -1;
 387
 388    if (nameLen == -1) {
 389       /* name is null-terminated */
 390       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 391          if (paramList->Parameters[i].Name &&
 392              strcmp(paramList->Parameters[i].Name, name) == 0)
 393             return i;
 394       }
 395    }
 396    else {
 397       /* name is not null-terminated, use nameLen */
 398       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 399          if (paramList->Parameters[i].Name &&
 400              strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 401              && strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 402             return i;
 403       }
 404    }
 405    return -1;
 406 }
 407
 408
 409 /**
 410  * Look for a float vector in the given parameter list.  The float vector
 411  * may be of length 1, 2, 3 or 4.  If swizzleOut is non-null, we'll try
 412  * swizzling to find a match.
 413  * \param list  the parameter list to search
 414  * \param v  the float vector to search for
 415  * \param vSize  number of element in v
 416  * \param posOut  returns the position of the constant, if found
 417  * \param swizzleOut  returns a swizzle mask describing location of the
 418  *                    vector elements if found.
 419  * \return GL_TRUE if found, GL_FALSE if not found
 420  */
 421 GLboolean
 422 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
 423                                 const gl_constant_value v[], GLuint vSize,
 424                                 GLint *posOut, GLuint *swizzleOut)
 425 {
 426    GLuint i;
 427
 428    assert(vSize >= 1);
 429    assert(vSize <= 4);
 430
 431    if (!list) {
 432       *posOut = -1;
 433       return GL_FALSE;
 434    }
 435
 436    for (i = 0; i < list->NumParameters; i++) {
 437       if (list->Parameters[i].Type == PROGRAM_CONSTANT) {
 438          if (!swizzleOut) {
 439             /* swizzle not allowed */
 440             GLuint j, match = 0;
 441             for (j = 0; j < vSize; j++) {
 442                if (v[j].u == list->ParameterValues[i][j].u)
 443                   match++;
 444             }
 445             if (match == vSize) {
 446                *posOut = i;
 447                return GL_TRUE;
 448             }
 449          }
 450          else {
 451             /* try matching w/ swizzle */
 452              if (vSize == 1) {
 453                 /* look for v[0] anywhere within float[4] value */
 454                 GLuint j;
 455                 for (j = 0; j < list->Parameters[i].Size; j++) {
 456                    if (list->ParameterValues[i][j].u == v[0].u) {
 457                       /* found it */
 458                       *posOut = i;
 459                       *swizzleOut = MAKE_SWIZZLE4(j, j, j, j);
 460                       return GL_TRUE;
 461                    }
 462                 }
 463              }
 464              else if (vSize <= list->Parameters[i].Size) {
 465                 /* see if we can match this constant (with a swizzle) */
 466                 GLuint swz[4];
 467                 GLuint match = 0, j, k;
 468                 for (j = 0; j < vSize; j++) {
 469                    if (v[j].u == list->ParameterValues[i][j].u) {
 470                       swz[j] = j;
 471                       match++;
 472                    }
 473                    else {
 474                       for (k = 0; k < list->Parameters[i].Size; k++) {
 475                          if (v[j].u == list->ParameterValues[i][k].u) {
 476                             swz[j] = k;
 477                             match++;
 478                             break;
 479                          }
 480                       }
 481                    }
 482                 }
 483                 /* smear last value to remaining positions */
 484                 for (; j < 4; j++)
 485                    swz[j] = swz[j-1];
 486
 487                 if (match == vSize) {
 488                    *posOut = i;
 489                    *swizzleOut = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
 490                    return GL_TRUE;
 491                 }
 492              }
 493          }
 494       }
 495    }
 496
 497    *posOut = -1;
 498    return GL_FALSE;
 499 }
 500
 501
 502 struct gl_program_parameter_list *
 503 _mesa_clone_parameter_list(const struct gl_program_parameter_list *list)
 504 {
 505    struct gl_program_parameter_list *clone;
 506    GLuint i;
 507
 508    clone = _mesa_new_parameter_list();
 509    if (!clone)
 510       return NULL;
 511
 512    /** Not too efficient, but correct */
 513    for (i = 0; i < list->NumParameters; i++) {
 514       struct gl_program_parameter *p = list->Parameters + i;
 515       struct gl_program_parameter *pCopy;
 516       GLuint size = MIN2(p->Size, 4);
 517       GLint j = _mesa_add_parameter(clone, p->Type, p->Name, size, p->DataType,
 518                                     list->ParameterValues[i], NULL);
 519       ASSERT(j >= 0);
 520       pCopy = clone->Parameters + j;
 521       /* copy state indexes */
 522       if (p->Type == PROGRAM_STATE_VAR) {
 523          GLint k;
 524          for (k = 0; k < STATE_LENGTH; k++) {
 525             pCopy->StateIndexes[k] = p->StateIndexes[k];
 526          }
 527       }
 528       else {
 529          clone->Parameters[j].Size = p->Size;
 530       }
 531
 532    }
 533
 534    clone->StateFlags = list->StateFlags;
 535
 536    return clone;
 537 }
 538
 539
 540 /**
 541  * Return a new parameter list which is listA + listB.
 542  */
 543 struct gl_program_parameter_list *
 544 _mesa_combine_parameter_lists(const struct gl_program_parameter_list *listA,
 545                               const struct gl_program_parameter_list *listB)
 546 {
 547    struct gl_program_parameter_list *list;
 548
 549    if (listA) {
 550       list = _mesa_clone_parameter_list(listA);
 551       if (list && listB) {
 552          GLuint i;
 553          for (i = 0; i < listB->NumParameters; i++) {
 554             struct gl_program_parameter *param = listB->Parameters + i;
 555             _mesa_add_parameter(list, param->Type, param->Name, param->Size,
 556                                 param->DataType,
 557                                 listB->ParameterValues[i],
 558                                 param->StateIndexes);
 559          }
 560       }
 561    }
 562    else if (listB) {
 563       list = _mesa_clone_parameter_list(listB);
 564    }
 565    else {
 566       list = NULL;
 567    }
 568    return list;
 569 }