src/mesa/main/arbprogram.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.0
   4  *
   5  * Copyright (C) 1999-2007  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 OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file arbprogram.c
  28  * ARB_vertex/fragment_program state management functions.
  29  * \author Brian Paul
  30  */
  31
  32
  33 #include "main/glheader.h"
  34 #include "main/context.h"
  35 #include "main/hash.h"
  36 #include "main/imports.h"
  37 #include "main/macros.h"
  38 #include "main/mtypes.h"
  39 #include "main/arbprogram.h"
  40 #include "program/arbprogparse.h"
  41 #include "program/program.h"
  42
  43
  44 /**
  45  * Bind a program (make it current)
  46  * \note Called from the GL API dispatcher by both glBindProgramNV
  47  * and glBindProgramARB.
  48  */
  49 void GLAPIENTRY
  50 _mesa_BindProgramARB(GLenum target, GLuint id)
  51 {
  52    struct gl_program *curProg, *newProg;
  53    GET_CURRENT_CONTEXT(ctx);
  54
  55    /* Error-check target and get curProg */
  56    if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
  57       curProg = &ctx->VertexProgram.Current->Base;
  58    }
  59    else if (target == GL_FRAGMENT_PROGRAM_ARB
  60             && ctx->Extensions.ARB_fragment_program) {
  61       curProg = &ctx->FragmentProgram.Current->Base;
  62    }
  63    else {
  64       _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramARB(target)");
  65       return;
  66    }
  67
  68    /*
  69     * Get pointer to new program to bind.
  70     * NOTE: binding to a non-existant program is not an error.
  71     * That's supposed to be caught in glBegin.
  72     */
  73    if (id == 0) {
  74       /* Bind a default program */
  75       newProg = NULL;
  76       if (target == GL_VERTEX_PROGRAM_ARB)
  77          newProg = &ctx->Shared->DefaultVertexProgram->Base;
  78       else
  79          newProg = &ctx->Shared->DefaultFragmentProgram->Base;
  80    }
  81    else {
  82       /* Bind a user program */
  83       newProg = _mesa_lookup_program(ctx, id);
  84       if (!newProg || newProg == &_mesa_DummyProgram) {
  85          /* allocate a new program now */
  86          newProg = ctx->Driver.NewProgram(ctx, target, id);
  87          if (!newProg) {
  88             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramARB");
  89             return;
  90          }
  91          _mesa_HashInsert(ctx->Shared->Programs, id, newProg);
  92       }
  93       else if (newProg->Target != target) {
  94          _mesa_error(ctx, GL_INVALID_OPERATION,
  95                      "glBindProgramARB(target mismatch)");
  96          return;
  97       }
  98    }
  99
 100    /** All error checking is complete now **/
 101
 102    if (curProg->Id == id) {
 103       /* binding same program - no change */
 104       return;
 105    }
 106
 107    /* signal new program (and its new constants) */
 108    FLUSH_VERTICES(ctx, _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS);
 109
 110    /* bind newProg */
 111    if (target == GL_VERTEX_PROGRAM_ARB) {
 112       _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 113                                gl_vertex_program(newProg));
 114    }
 115    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 116       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
 117                                gl_fragment_program(newProg));
 118    }
 119
 120    /* Never null pointers */
 121    ASSERT(ctx->VertexProgram.Current);
 122    ASSERT(ctx->FragmentProgram.Current);
 123
 124    if (ctx->Driver.BindProgram)
 125       ctx->Driver.BindProgram(ctx, target, newProg);
 126 }
 127
 128
 129 /**
 130  * Delete a list of programs.
 131  * \note Not compiled into display lists.
 132  * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
 133  */
 134 void GLAPIENTRY
 135 _mesa_DeleteProgramsARB(GLsizei n, const GLuint *ids)
 136 {
 137    GLint i;
 138    GET_CURRENT_CONTEXT(ctx);
 139
 140    FLUSH_VERTICES(ctx, 0);
 141
 142    if (n < 0) {
 143       _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
 144       return;
 145    }
 146
 147    for (i = 0; i < n; i++) {
 148       if (ids[i] != 0) {
 149          struct gl_program *prog = _mesa_lookup_program(ctx, ids[i]);
 150          if (prog == &_mesa_DummyProgram) {
 151             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
 152          }
 153          else if (prog) {
 154             /* Unbind program if necessary */
 155             switch (prog->Target) {
 156             case GL_VERTEX_PROGRAM_ARB:
 157                if (ctx->VertexProgram.Current &&
 158                    ctx->VertexProgram.Current->Base.Id == ids[i]) {
 159                   /* unbind this currently bound program */
 160                   _mesa_BindProgramARB(prog->Target, 0);
 161                }
 162                break;
 163             case GL_FRAGMENT_PROGRAM_ARB:
 164                if (ctx->FragmentProgram.Current &&
 165                    ctx->FragmentProgram.Current->Base.Id == ids[i]) {
 166                   /* unbind this currently bound program */
 167                   _mesa_BindProgramARB(prog->Target, 0);
 168                }
 169                break;
 170             default:
 171                _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
 172                return;
 173             }
 174             /* The ID is immediately available for re-use now */
 175             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
 176             _mesa_reference_program(ctx, &prog, NULL);
 177          }
 178       }
 179    }
 180 }
 181
 182
 183 /**
 184  * Generate a list of new program identifiers.
 185  * \note Not compiled into display lists.
 186  * \note Called by both glGenProgramsNV and glGenProgramsARB.
 187  */
 188 void GLAPIENTRY
 189 _mesa_GenProgramsARB(GLsizei n, GLuint *ids)
 190 {
 191    GLuint first;
 192    GLuint i;
 193    GET_CURRENT_CONTEXT(ctx);
 194
 195    if (n < 0) {
 196       _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
 197       return;
 198    }
 199
 200    if (!ids)
 201       return;
 202
 203    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
 204
 205    /* Insert pointer to dummy program as placeholder */
 206    for (i = 0; i < (GLuint) n; i++) {
 207       _mesa_HashInsert(ctx->Shared->Programs, first + i, &_mesa_DummyProgram);
 208    }
 209
 210    /* Return the program names */
 211    for (i = 0; i < (GLuint) n; i++) {
 212       ids[i] = first + i;
 213    }
 214 }
 215
 216
 217 /**
 218  * Determine if id names a vertex or fragment program.
 219  * \note Not compiled into display lists.
 220  * \note Called from both glIsProgramNV and glIsProgramARB.
 221  * \param id is the program identifier
 222  * \return GL_TRUE if id is a program, else GL_FALSE.
 223  */
 224 GLboolean GLAPIENTRY
 225 _mesa_IsProgramARB(GLuint id)
 226 {
 227    struct gl_program *prog = NULL;
 228    GET_CURRENT_CONTEXT(ctx);
 229    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 230
 231    if (id == 0)
 232       return GL_FALSE;
 233
 234    prog = _mesa_lookup_program(ctx, id);
 235    if (prog && (prog != &_mesa_DummyProgram))
 236       return GL_TRUE;
 237    else
 238       return GL_FALSE;
 239 }
 240
 241 static GLboolean
 242 get_local_param_pointer(struct gl_context *ctx, const char *func,
 243                         GLenum target, GLuint index, GLfloat **param)
 244 {
 245    struct gl_program *prog;
 246    GLuint maxParams;
 247
 248    if (target == GL_VERTEX_PROGRAM_ARB
 249        && ctx->Extensions.ARB_vertex_program) {
 250       prog = &(ctx->VertexProgram.Current->Base);
 251       maxParams = ctx->Const.VertexProgram.MaxLocalParams;
 252    }
 253    else if (target == GL_FRAGMENT_PROGRAM_ARB
 254             && ctx->Extensions.ARB_fragment_program) {
 255       prog = &(ctx->FragmentProgram.Current->Base);
 256       maxParams = ctx->Const.FragmentProgram.MaxLocalParams;
 257    }
 258    else {
 259       _mesa_error(ctx, GL_INVALID_ENUM,
 260                   "%s(target)", func);
 261       return GL_FALSE;
 262    }
 263
 264    if (index >= maxParams) {
 265       _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 266       return GL_FALSE;
 267    }
 268
 269    *param = prog->LocalParams[index];
 270    return GL_TRUE;
 271 }
 272
 273
 274 static GLboolean
 275 get_env_param_pointer(struct gl_context *ctx, const char *func,
 276                       GLenum target, GLuint index, GLfloat **param)
 277 {
 278    if (target == GL_FRAGMENT_PROGRAM_ARB
 279        && ctx->Extensions.ARB_fragment_program) {
 280       if (index >= ctx->Const.FragmentProgram.MaxEnvParams) {
 281          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 282          return GL_FALSE;
 283       }
 284       *param = ctx->FragmentProgram.Parameters[index];
 285       return GL_TRUE;
 286    }
 287    else if (target == GL_VERTEX_PROGRAM_ARB &&
 288             ctx->Extensions.ARB_vertex_program) {
 289       if (index >= ctx->Const.VertexProgram.MaxEnvParams) {
 290          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 291          return GL_FALSE;
 292       }
 293       *param = ctx->VertexProgram.Parameters[index];
 294       return GL_TRUE;
 295    } else {
 296       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
 297       return GL_FALSE;
 298    }
 299 }
 300
 301 void GLAPIENTRY
 302 _mesa_ProgramStringARB(GLenum target, GLenum format, GLsizei len,
 303                        const GLvoid *string)
 304 {
 305    struct gl_program *base;
 306    GET_CURRENT_CONTEXT(ctx);
 307
 308    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 309
 310    if (!ctx->Extensions.ARB_vertex_program
 311        && !ctx->Extensions.ARB_fragment_program) {
 312       _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramStringARB()");
 313       return;
 314    }
 315
 316    if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
 317       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
 318       return;
 319    }
 320
 321    if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
 322       struct gl_vertex_program *prog = ctx->VertexProgram.Current;
 323       _mesa_parse_arb_vertex_program(ctx, target, string, len, prog);
 324
 325       base = & prog->Base;
 326    }
 327    else if (target == GL_FRAGMENT_PROGRAM_ARB
 328             && ctx->Extensions.ARB_fragment_program) {
 329       struct gl_fragment_program *prog = ctx->FragmentProgram.Current;
 330       _mesa_parse_arb_fragment_program(ctx, target, string, len, prog);
 331
 332       base = & prog->Base;
 333    }
 334    else {
 335       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(target)");
 336       return;
 337    }
 338
 339    if (ctx->Program.ErrorPos == -1) {
 340       /* finally, give the program to the driver for translation/checking */
 341       if (!ctx->Driver.ProgramStringNotify(ctx, target, base)) {
 342          _mesa_error(ctx, GL_INVALID_OPERATION,
 343                      "glProgramStringARB(rejected by driver");
 344       }
 345    }
 346 }
 347
 348
 349 /**
 350  * Set a program env parameter register.
 351  * \note Called from the GL API dispatcher.
 352  */
 353 void GLAPIENTRY
 354 _mesa_ProgramEnvParameter4dARB(GLenum target, GLuint index,
 355                                GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 356 {
 357    _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) x, (GLfloat) y,
 358                                   (GLfloat) z, (GLfloat) w);
 359 }
 360
 361
 362 /**
 363  * Set a program env parameter register.
 364  * \note Called from the GL API dispatcher.
 365  */
 366 void GLAPIENTRY
 367 _mesa_ProgramEnvParameter4dvARB(GLenum target, GLuint index,
 368                                 const GLdouble *params)
 369 {
 370    _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) params[0],
 371                                   (GLfloat) params[1], (GLfloat) params[2],
 372                                   (GLfloat) params[3]);
 373 }
 374
 375
 376 /**
 377  * Set a program env parameter register.
 378  * \note Called from the GL API dispatcher.
 379  */
 380 void GLAPIENTRY
 381 _mesa_ProgramEnvParameter4fARB(GLenum target, GLuint index,
 382                                GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 383 {
 384    GLfloat *param;
 385
 386    GET_CURRENT_CONTEXT(ctx);
 387
 388    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 389
 390    if (get_env_param_pointer(ctx, "glProgramEnvParameter",
 391                              target, index, &param)) {
 392       ASSIGN_4V(param, x, y, z, w);
 393    }
 394 }
 395
 396
 397
 398 /**
 399  * Set a program env parameter register.
 400  * \note Called from the GL API dispatcher.
 401  */
 402 void GLAPIENTRY
 403 _mesa_ProgramEnvParameter4fvARB(GLenum target, GLuint index,
 404                                 const GLfloat *params)
 405 {
 406    GLfloat *param;
 407
 408    GET_CURRENT_CONTEXT(ctx);
 409
 410    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 411
 412    if (get_env_param_pointer(ctx, "glProgramEnvParameter4fv",
 413                               target, index, &param)) {
 414       memcpy(param, params, 4 * sizeof(GLfloat));
 415    }
 416 }
 417
 418
 419 void GLAPIENTRY
 420 _mesa_ProgramEnvParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
 421                                  const GLfloat *params)
 422 {
 423    GET_CURRENT_CONTEXT(ctx);
 424    GLfloat * dest;
 425
 426    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 427
 428    if (count <= 0) {
 429       _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(count)");
 430    }
 431
 432    if (target == GL_FRAGMENT_PROGRAM_ARB
 433        && ctx->Extensions.ARB_fragment_program) {
 434       if ((index + count) > ctx->Const.FragmentProgram.MaxEnvParams) {
 435          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
 436          return;
 437       }
 438       dest = ctx->FragmentProgram.Parameters[index];
 439    }
 440    else if (target == GL_VERTEX_PROGRAM_ARB
 441        && ctx->Extensions.ARB_vertex_program) {
 442       if ((index + count) > ctx->Const.VertexProgram.MaxEnvParams) {
 443          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
 444          return;
 445       }
 446       dest = ctx->VertexProgram.Parameters[index];
 447    }
 448    else {
 449       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameters4fv(target)");
 450       return;
 451    }
 452
 453    memcpy(dest, params, count * 4 * sizeof(GLfloat));
 454 }
 455
 456
 457 void GLAPIENTRY
 458 _mesa_GetProgramEnvParameterdvARB(GLenum target, GLuint index,
 459                                   GLdouble *params)
 460 {
 461    GET_CURRENT_CONTEXT(ctx);
 462    GLfloat *fparam;
 463
 464    if (get_env_param_pointer(ctx, "glGetProgramEnvParameterdv",
 465                              target, index, &fparam)) {
 466       COPY_4V(params, fparam);
 467    }
 468 }
 469
 470
 471 void GLAPIENTRY
 472 _mesa_GetProgramEnvParameterfvARB(GLenum target, GLuint index,
 473                                   GLfloat *params)
 474 {
 475    GLfloat *param;
 476
 477    GET_CURRENT_CONTEXT(ctx);
 478
 479    if (get_env_param_pointer(ctx, "glGetProgramEnvParameterfv",
 480                               target, index, &param)) {
 481       COPY_4V(params, param);
 482    }
 483 }
 484
 485
 486 void GLAPIENTRY
 487 _mesa_ProgramLocalParameter4fARB(GLenum target, GLuint index,
 488                                  GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 489 {
 490    GET_CURRENT_CONTEXT(ctx);
 491    GLfloat *param;
 492
 493    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 494
 495    if (get_local_param_pointer(ctx, "glProgramLocalParameterARB",
 496                                target, index, &param)) {
 497       ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
 498       ASSIGN_4V(param, x, y, z, w);
 499    }
 500 }
 501
 502
 503 void GLAPIENTRY
 504 _mesa_ProgramLocalParameter4fvARB(GLenum target, GLuint index,
 505                                   const GLfloat *params)
 506 {
 507    _mesa_ProgramLocalParameter4fARB(target, index, params[0], params[1],
 508                                     params[2], params[3]);
 509 }
 510
 511
 512 void GLAPIENTRY
 513 _mesa_ProgramLocalParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
 514                                    const GLfloat *params)
 515 {
 516    GET_CURRENT_CONTEXT(ctx);
 517    GLfloat *dest;
 518
 519    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 520
 521    if (count <= 0) {
 522       _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fv(count)");
 523    }
 524
 525    if (target == GL_FRAGMENT_PROGRAM_ARB
 526        && ctx->Extensions.ARB_fragment_program) {
 527       if ((index + count) > ctx->Const.FragmentProgram.MaxLocalParams) {
 528          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fvEXT(index + count)");
 529          return;
 530       }
 531       dest = ctx->FragmentProgram.Current->Base.LocalParams[index];
 532    }
 533    else if (target == GL_VERTEX_PROGRAM_ARB
 534             && ctx->Extensions.ARB_vertex_program) {
 535       if ((index + count) > ctx->Const.VertexProgram.MaxLocalParams) {
 536          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fvEXT(index + count)");
 537          return;
 538       }
 539       dest = ctx->VertexProgram.Current->Base.LocalParams[index];
 540    }
 541    else {
 542       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramLocalParameters4fvEXT(target)");
 543       return;
 544    }
 545
 546    memcpy(dest, params, count * 4 * sizeof(GLfloat));
 547 }
 548
 549
 550 void GLAPIENTRY
 551 _mesa_ProgramLocalParameter4dARB(GLenum target, GLuint index,
 552                                  GLdouble x, GLdouble y,
 553                                  GLdouble z, GLdouble w)
 554 {
 555    _mesa_ProgramLocalParameter4fARB(target, index, (GLfloat) x, (GLfloat) y,
 556                                     (GLfloat) z, (GLfloat) w);
 557 }
 558
 559
 560 void GLAPIENTRY
 561 _mesa_ProgramLocalParameter4dvARB(GLenum target, GLuint index,
 562                                   const GLdouble *params)
 563 {
 564    _mesa_ProgramLocalParameter4fARB(target, index,
 565                                     (GLfloat) params[0], (GLfloat) params[1],
 566                                     (GLfloat) params[2], (GLfloat) params[3]);
 567 }
 568
 569
 570 void GLAPIENTRY
 571 _mesa_GetProgramLocalParameterfvARB(GLenum target, GLuint index,
 572                                     GLfloat *params)
 573 {
 574    GLfloat *param;
 575    GET_CURRENT_CONTEXT(ctx);
 576
 577    if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
 578                                 target, index, &param)) {
 579       COPY_4V(params, param);
 580    }
 581 }
 582
 583
 584 void GLAPIENTRY
 585 _mesa_GetProgramLocalParameterdvARB(GLenum target, GLuint index,
 586                                     GLdouble *params)
 587 {
 588    GLfloat *param;
 589    GET_CURRENT_CONTEXT(ctx);
 590
 591    if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
 592                                 target, index, &param)) {
 593       COPY_4V(params, param);
 594    }
 595 }
 596
 597
 598 void GLAPIENTRY
 599 _mesa_GetProgramivARB(GLenum target, GLenum pname, GLint *params)
 600 {
 601    const struct gl_program_constants *limits;
 602    struct gl_program *prog;
 603    GET_CURRENT_CONTEXT(ctx);
 604
 605    if (target == GL_VERTEX_PROGRAM_ARB
 606        && ctx->Extensions.ARB_vertex_program) {
 607       prog = &(ctx->VertexProgram.Current->Base);
 608       limits = &ctx->Const.VertexProgram;
 609    }
 610    else if (target == GL_FRAGMENT_PROGRAM_ARB
 611             && ctx->Extensions.ARB_fragment_program) {
 612       prog = &(ctx->FragmentProgram.Current->Base);
 613       limits = &ctx->Const.FragmentProgram;
 614    }
 615    else {
 616       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
 617       return;
 618    }
 619
 620    ASSERT(prog);
 621    ASSERT(limits);
 622
 623    /* Queries supported for both vertex and fragment programs */
 624    switch (pname) {
 625       case GL_PROGRAM_LENGTH_ARB:
 626          *params
 627             = prog->String ? (GLint) strlen((char *) prog->String) : 0;
 628          return;
 629       case GL_PROGRAM_FORMAT_ARB:
 630          *params = prog->Format;
 631          return;
 632       case GL_PROGRAM_BINDING_ARB:
 633          *params = prog->Id;
 634          return;
 635       case GL_PROGRAM_INSTRUCTIONS_ARB:
 636          *params = prog->NumInstructions;
 637          return;
 638       case GL_MAX_PROGRAM_INSTRUCTIONS_ARB:
 639          *params = limits->MaxInstructions;
 640          return;
 641       case GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
 642          *params = prog->NumNativeInstructions;
 643          return;
 644       case GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
 645          *params = limits->MaxNativeInstructions;
 646          return;
 647       case GL_PROGRAM_TEMPORARIES_ARB:
 648          *params = prog->NumTemporaries;
 649          return;
 650       case GL_MAX_PROGRAM_TEMPORARIES_ARB:
 651          *params = limits->MaxTemps;
 652          return;
 653       case GL_PROGRAM_NATIVE_TEMPORARIES_ARB:
 654          *params = prog->NumNativeTemporaries;
 655          return;
 656       case GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB:
 657          *params = limits->MaxNativeTemps;
 658          return;
 659       case GL_PROGRAM_PARAMETERS_ARB:
 660          *params = prog->NumParameters;
 661          return;
 662       case GL_MAX_PROGRAM_PARAMETERS_ARB:
 663          *params = limits->MaxParameters;
 664          return;
 665       case GL_PROGRAM_NATIVE_PARAMETERS_ARB:
 666          *params = prog->NumNativeParameters;
 667          return;
 668       case GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB:
 669          *params = limits->MaxNativeParameters;
 670          return;
 671       case GL_PROGRAM_ATTRIBS_ARB:
 672          *params = prog->NumAttributes;
 673          return;
 674       case GL_MAX_PROGRAM_ATTRIBS_ARB:
 675          *params = limits->MaxAttribs;
 676          return;
 677       case GL_PROGRAM_NATIVE_ATTRIBS_ARB:
 678          *params = prog->NumNativeAttributes;
 679          return;
 680       case GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB:
 681          *params = limits->MaxNativeAttribs;
 682          return;
 683       case GL_PROGRAM_ADDRESS_REGISTERS_ARB:
 684          *params = prog->NumAddressRegs;
 685          return;
 686       case GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB:
 687          *params = limits->MaxAddressRegs;
 688          return;
 689       case GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
 690          *params = prog->NumNativeAddressRegs;
 691          return;
 692       case GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
 693          *params = limits->MaxNativeAddressRegs;
 694          return;
 695       case GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB:
 696          *params = limits->MaxLocalParams;
 697          return;
 698       case GL_MAX_PROGRAM_ENV_PARAMETERS_ARB:
 699          *params = limits->MaxEnvParams;
 700          return;
 701       case GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB:
 702          /*
 703           * XXX we may not really need a driver callback here.
 704           * If the number of native instructions, registers, etc. used
 705           * are all below the maximums, we could return true.
 706           * The spec says that even if this query returns true, there's
 707           * no guarantee that the program will run in hardware.
 708           */
 709          if (prog->Id == 0) {
 710             /* default/null program */
 711             *params = GL_FALSE;
 712          }
 713          else if (ctx->Driver.IsProgramNative) {
 714             /* ask the driver */
 715             *params = ctx->Driver.IsProgramNative( ctx, target, prog );
 716          }
 717          else {
 718             /* probably running in software */
 719             *params = GL_TRUE;
 720          }
 721          return;
 722       default:
 723          /* continue with fragment-program only queries below */
 724          break;
 725    }
 726
 727    /*
 728     * The following apply to fragment programs only (at this time)
 729     */
 730    if (target == GL_FRAGMENT_PROGRAM_ARB) {
 731       const struct gl_fragment_program *fp = ctx->FragmentProgram.Current;
 732       switch (pname) {
 733          case GL_PROGRAM_ALU_INSTRUCTIONS_ARB:
 734             *params = fp->Base.NumNativeAluInstructions;
 735             return;
 736          case GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
 737             *params = fp->Base.NumAluInstructions;
 738             return;
 739          case GL_PROGRAM_TEX_INSTRUCTIONS_ARB:
 740             *params = fp->Base.NumTexInstructions;
 741             return;
 742          case GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
 743             *params = fp->Base.NumNativeTexInstructions;
 744             return;
 745          case GL_PROGRAM_TEX_INDIRECTIONS_ARB:
 746             *params = fp->Base.NumTexIndirections;
 747             return;
 748          case GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
 749             *params = fp->Base.NumNativeTexIndirections;
 750             return;
 751          case GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB:
 752             *params = limits->MaxAluInstructions;
 753             return;
 754          case GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
 755             *params = limits->MaxNativeAluInstructions;
 756             return;
 757          case GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB:
 758             *params = limits->MaxTexInstructions;
 759             return;
 760          case GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
 761             *params = limits->MaxNativeTexInstructions;
 762             return;
 763          case GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB:
 764             *params = limits->MaxTexIndirections;
 765             return;
 766          case GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
 767             *params = limits->MaxNativeTexIndirections;
 768             return;
 769          default:
 770             _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
 771             return;
 772       }
 773    } else {
 774       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
 775       return;
 776    }
 777 }
 778
 779
 780 void GLAPIENTRY
 781 _mesa_GetProgramStringARB(GLenum target, GLenum pname, GLvoid *string)
 782 {
 783    const struct gl_program *prog;
 784    char *dst = (char *) string;
 785    GET_CURRENT_CONTEXT(ctx);
 786
 787    if (target == GL_VERTEX_PROGRAM_ARB) {
 788       prog = &(ctx->VertexProgram.Current->Base);
 789    }
 790    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 791       prog = &(ctx->FragmentProgram.Current->Base);
 792    }
 793    else {
 794       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramStringARB(target)");
 795       return;
 796    }
 797
 798    ASSERT(prog);
 799
 800    if (pname != GL_PROGRAM_STRING_ARB) {
 801       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramStringARB(pname)");
 802       return;
 803    }
 804
 805    if (prog->String)
 806       memcpy(dst, prog->String, strlen((char *) prog->String));
 807    else
 808       *dst = '\0';
 809 }