src/mesa/main/arbprogram.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file arbprogram.c
  27  * ARB_vertex/fragment_program state management functions.
  28  * \author Brian Paul
  29  */
  30
  31
  32 #include "main/glheader.h"
  33 #include "main/context.h"
  34 #include "main/hash.h"
  35 #include "main/imports.h"
  36 #include "main/macros.h"
  37 #include "main/mtypes.h"
  38 #include "main/arbprogram.h"
  39 #include "program/arbprogparse.h"
  40 #include "program/program.h"
  41
  42
  43 /**
  44  * Bind a program (make it current)
  45  * \note Called from the GL API dispatcher by both glBindProgramNV
  46  * and glBindProgramARB.
  47  */
  48 void GLAPIENTRY
  49 _mesa_BindProgramARB(GLenum target, GLuint id)
  50 {
  51    struct gl_program *curProg, *newProg;
  52    GET_CURRENT_CONTEXT(ctx);
  53
  54    /* Error-check target and get curProg */
  55    if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
  56       curProg = &ctx->VertexProgram.Current->Base;
  57    }
  58    else if (target == GL_FRAGMENT_PROGRAM_ARB
  59             && ctx->Extensions.ARB_fragment_program) {
  60       curProg = &ctx->FragmentProgram.Current->Base;
  61    }
  62    else {
  63       _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramARB(target)");
  64       return;
  65    }
  66
  67    /*
  68     * Get pointer to new program to bind.
  69     * NOTE: binding to a non-existant program is not an error.
  70     * That's supposed to be caught in glBegin.
  71     */
  72    if (id == 0) {
  73       /* Bind a default program */
  74       newProg = NULL;
  75       if (target == GL_VERTEX_PROGRAM_ARB)
  76          newProg = &ctx->Shared->DefaultVertexProgram->Base;
  77       else
  78          newProg = &ctx->Shared->DefaultFragmentProgram->Base;
  79    }
  80    else {
  81       /* Bind a user program */
  82       newProg = _mesa_lookup_program(ctx, id);
  83       if (!newProg || newProg == &_mesa_DummyProgram) {
  84          /* allocate a new program now */
  85          newProg = ctx->Driver.NewProgram(ctx, target, id);
  86          if (!newProg) {
  87             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramARB");
  88             return;
  89          }
  90          _mesa_HashInsert(ctx->Shared->Programs, id, newProg);
  91       }
  92       else if (newProg->Target != target) {
  93          _mesa_error(ctx, GL_INVALID_OPERATION,
  94                      "glBindProgramARB(target mismatch)");
  95          return;
  96       }
  97    }
  98
  99    /** All error checking is complete now **/
 100
 101    if (curProg->Id == id) {
 102       /* binding same program - no change */
 103       return;
 104    }
 105
 106    /* signal new program (and its new constants) */
 107    FLUSH_VERTICES(ctx, _NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS);
 108
 109    /* bind newProg */
 110    if (target == GL_VERTEX_PROGRAM_ARB) {
 111       _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 112                                gl_vertex_program(newProg));
 113    }
 114    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 115       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
 116                                gl_fragment_program(newProg));
 117    }
 118
 119    /* Never null pointers */
 120    ASSERT(ctx->VertexProgram.Current);
 121    ASSERT(ctx->FragmentProgram.Current);
 122
 123    if (ctx->Driver.BindProgram)
 124       ctx->Driver.BindProgram(ctx, target, newProg);
 125 }
 126
 127
 128 /**
 129  * Delete a list of programs.
 130  * \note Not compiled into display lists.
 131  * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
 132  */
 133 void GLAPIENTRY
 134 _mesa_DeleteProgramsARB(GLsizei n, const GLuint *ids)
 135 {
 136    GLint i;
 137    GET_CURRENT_CONTEXT(ctx);
 138
 139    FLUSH_VERTICES(ctx, 0);
 140
 141    if (n < 0) {
 142       _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
 143       return;
 144    }
 145
 146    for (i = 0; i < n; i++) {
 147       if (ids[i] != 0) {
 148          struct gl_program *prog = _mesa_lookup_program(ctx, ids[i]);
 149          if (prog == &_mesa_DummyProgram) {
 150             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
 151          }
 152          else if (prog) {
 153             /* Unbind program if necessary */
 154             switch (prog->Target) {
 155             case GL_VERTEX_PROGRAM_ARB:
 156                if (ctx->VertexProgram.Current &&
 157                    ctx->VertexProgram.Current->Base.Id == ids[i]) {
 158                   /* unbind this currently bound program */
 159                   _mesa_BindProgramARB(prog->Target, 0);
 160                }
 161                break;
 162             case GL_FRAGMENT_PROGRAM_ARB:
 163                if (ctx->FragmentProgram.Current &&
 164                    ctx->FragmentProgram.Current->Base.Id == ids[i]) {
 165                   /* unbind this currently bound program */
 166                   _mesa_BindProgramARB(prog->Target, 0);
 167                }
 168                break;
 169             default:
 170                _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
 171                return;
 172             }
 173             /* The ID is immediately available for re-use now */
 174             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
 175             _mesa_reference_program(ctx, &prog, NULL);
 176          }
 177       }
 178    }
 179 }
 180
 181
 182 /**
 183  * Generate a list of new program identifiers.
 184  * \note Not compiled into display lists.
 185  * \note Called by both glGenProgramsNV and glGenProgramsARB.
 186  */
 187 void GLAPIENTRY
 188 _mesa_GenProgramsARB(GLsizei n, GLuint *ids)
 189 {
 190    GLuint first;
 191    GLuint i;
 192    GET_CURRENT_CONTEXT(ctx);
 193
 194    if (n < 0) {
 195       _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
 196       return;
 197    }
 198
 199    if (!ids)
 200       return;
 201
 202    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
 203
 204    /* Insert pointer to dummy program as placeholder */
 205    for (i = 0; i < (GLuint) n; i++) {
 206       _mesa_HashInsert(ctx->Shared->Programs, first + i, &_mesa_DummyProgram);
 207    }
 208
 209    /* Return the program names */
 210    for (i = 0; i < (GLuint) n; i++) {
 211       ids[i] = first + i;
 212    }
 213 }
 214
 215
 216 /**
 217  * Determine if id names a vertex or fragment program.
 218  * \note Not compiled into display lists.
 219  * \note Called from both glIsProgramNV and glIsProgramARB.
 220  * \param id is the program identifier
 221  * \return GL_TRUE if id is a program, else GL_FALSE.
 222  */
 223 GLboolean GLAPIENTRY
 224 _mesa_IsProgramARB(GLuint id)
 225 {
 226    struct gl_program *prog = NULL;
 227    GET_CURRENT_CONTEXT(ctx);
 228    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 229
 230    if (id == 0)
 231       return GL_FALSE;
 232
 233    prog = _mesa_lookup_program(ctx, id);
 234    if (prog && (prog != &_mesa_DummyProgram))
 235       return GL_TRUE;
 236    else
 237       return GL_FALSE;
 238 }
 239
 240 static GLboolean
 241 get_local_param_pointer(struct gl_context *ctx, const char *func,
 242                         GLenum target, GLuint index, GLfloat **param)
 243 {
 244    struct gl_program *prog;
 245    GLuint maxParams;
 246
 247    if (target == GL_VERTEX_PROGRAM_ARB
 248        && ctx->Extensions.ARB_vertex_program) {
 249       prog = &(ctx->VertexProgram.Current->Base);
 250       maxParams = ctx->Const.VertexProgram.MaxLocalParams;
 251    }
 252    else if (target == GL_FRAGMENT_PROGRAM_ARB
 253             && ctx->Extensions.ARB_fragment_program) {
 254       prog = &(ctx->FragmentProgram.Current->Base);
 255       maxParams = ctx->Const.FragmentProgram.MaxLocalParams;
 256    }
 257    else {
 258       _mesa_error(ctx, GL_INVALID_ENUM,
 259                   "%s(target)", func);
 260       return GL_FALSE;
 261    }
 262
 263    if (index >= maxParams) {
 264       _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 265       return GL_FALSE;
 266    }
 267
 268    if (!prog->LocalParams) {
 269       prog->LocalParams = calloc(maxParams, sizeof(float[4]));
 270       if (!prog->LocalParams)
 271          return GL_FALSE;
 272    }
 273
 274    *param = prog->LocalParams[index];
 275    return GL_TRUE;
 276 }
 277
 278
 279 static GLboolean
 280 get_env_param_pointer(struct gl_context *ctx, const char *func,
 281                       GLenum target, GLuint index, GLfloat **param)
 282 {
 283    if (target == GL_FRAGMENT_PROGRAM_ARB
 284        && ctx->Extensions.ARB_fragment_program) {
 285       if (index >= ctx->Const.FragmentProgram.MaxEnvParams) {
 286          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 287          return GL_FALSE;
 288       }
 289       *param = ctx->FragmentProgram.Parameters[index];
 290       return GL_TRUE;
 291    }
 292    else if (target == GL_VERTEX_PROGRAM_ARB &&
 293             ctx->Extensions.ARB_vertex_program) {
 294       if (index >= ctx->Const.VertexProgram.MaxEnvParams) {
 295          _mesa_error(ctx, GL_INVALID_VALUE, "%s(index)", func);
 296          return GL_FALSE;
 297       }
 298       *param = ctx->VertexProgram.Parameters[index];
 299       return GL_TRUE;
 300    } else {
 301       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
 302       return GL_FALSE;
 303    }
 304 }
 305
 306 void GLAPIENTRY
 307 _mesa_ProgramStringARB(GLenum target, GLenum format, GLsizei len,
 308                        const GLvoid *string)
 309 {
 310    struct gl_program *base;
 311    GET_CURRENT_CONTEXT(ctx);
 312
 313    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 314
 315    if (!ctx->Extensions.ARB_vertex_program
 316        && !ctx->Extensions.ARB_fragment_program) {
 317       _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramStringARB()");
 318       return;
 319    }
 320
 321    if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
 322       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
 323       return;
 324    }
 325
 326    if (target == GL_VERTEX_PROGRAM_ARB && ctx->Extensions.ARB_vertex_program) {
 327       struct gl_vertex_program *prog = ctx->VertexProgram.Current;
 328       _mesa_parse_arb_vertex_program(ctx, target, string, len, prog);
 329
 330       base = & prog->Base;
 331    }
 332    else if (target == GL_FRAGMENT_PROGRAM_ARB
 333             && ctx->Extensions.ARB_fragment_program) {
 334       struct gl_fragment_program *prog = ctx->FragmentProgram.Current;
 335       _mesa_parse_arb_fragment_program(ctx, target, string, len, prog);
 336
 337       base = & prog->Base;
 338    }
 339    else {
 340       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(target)");
 341       return;
 342    }
 343
 344    if (ctx->Program.ErrorPos == -1) {
 345       /* finally, give the program to the driver for translation/checking */
 346       if (!ctx->Driver.ProgramStringNotify(ctx, target, base)) {
 347          _mesa_error(ctx, GL_INVALID_OPERATION,
 348                      "glProgramStringARB(rejected by driver");
 349       }
 350    }
 351 }
 352
 353
 354 /**
 355  * Set a program env parameter register.
 356  * \note Called from the GL API dispatcher.
 357  */
 358 void GLAPIENTRY
 359 _mesa_ProgramEnvParameter4dARB(GLenum target, GLuint index,
 360                                GLdouble x, GLdouble y, GLdouble z, GLdouble w)
 361 {
 362    _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) x, (GLfloat) y,
 363                                   (GLfloat) z, (GLfloat) w);
 364 }
 365
 366
 367 /**
 368  * Set a program env parameter register.
 369  * \note Called from the GL API dispatcher.
 370  */
 371 void GLAPIENTRY
 372 _mesa_ProgramEnvParameter4dvARB(GLenum target, GLuint index,
 373                                 const GLdouble *params)
 374 {
 375    _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) params[0],
 376                                   (GLfloat) params[1], (GLfloat) params[2],
 377                                   (GLfloat) params[3]);
 378 }
 379
 380
 381 /**
 382  * Set a program env parameter register.
 383  * \note Called from the GL API dispatcher.
 384  */
 385 void GLAPIENTRY
 386 _mesa_ProgramEnvParameter4fARB(GLenum target, GLuint index,
 387                                GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 388 {
 389    GLfloat *param;
 390
 391    GET_CURRENT_CONTEXT(ctx);
 392
 393    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 394
 395    if (get_env_param_pointer(ctx, "glProgramEnvParameter",
 396                              target, index, &param)) {
 397       ASSIGN_4V(param, x, y, z, w);
 398    }
 399 }
 400
 401
 402
 403 /**
 404  * Set a program env parameter register.
 405  * \note Called from the GL API dispatcher.
 406  */
 407 void GLAPIENTRY
 408 _mesa_ProgramEnvParameter4fvARB(GLenum target, GLuint index,
 409                                 const GLfloat *params)
 410 {
 411    GLfloat *param;
 412
 413    GET_CURRENT_CONTEXT(ctx);
 414
 415    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 416
 417    if (get_env_param_pointer(ctx, "glProgramEnvParameter4fv",
 418                               target, index, &param)) {
 419       memcpy(param, params, 4 * sizeof(GLfloat));
 420    }
 421 }
 422
 423
 424 void GLAPIENTRY
 425 _mesa_ProgramEnvParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
 426                                  const GLfloat *params)
 427 {
 428    GET_CURRENT_CONTEXT(ctx);
 429    GLfloat * dest;
 430
 431    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 432
 433    if (count <= 0) {
 434       _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(count)");
 435    }
 436
 437    if (target == GL_FRAGMENT_PROGRAM_ARB
 438        && ctx->Extensions.ARB_fragment_program) {
 439       if ((index + count) > ctx->Const.FragmentProgram.MaxEnvParams) {
 440          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
 441          return;
 442       }
 443       dest = ctx->FragmentProgram.Parameters[index];
 444    }
 445    else if (target == GL_VERTEX_PROGRAM_ARB
 446        && ctx->Extensions.ARB_vertex_program) {
 447       if ((index + count) > ctx->Const.VertexProgram.MaxEnvParams) {
 448          _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
 449          return;
 450       }
 451       dest = ctx->VertexProgram.Parameters[index];
 452    }
 453    else {
 454       _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameters4fv(target)");
 455       return;
 456    }
 457
 458    memcpy(dest, params, count * 4 * sizeof(GLfloat));
 459 }
 460
 461
 462 void GLAPIENTRY
 463 _mesa_GetProgramEnvParameterdvARB(GLenum target, GLuint index,
 464                                   GLdouble *params)
 465 {
 466    GET_CURRENT_CONTEXT(ctx);
 467    GLfloat *fparam;
 468
 469    if (get_env_param_pointer(ctx, "glGetProgramEnvParameterdv",
 470                              target, index, &fparam)) {
 471       COPY_4V(params, fparam);
 472    }
 473 }
 474
 475
 476 void GLAPIENTRY
 477 _mesa_GetProgramEnvParameterfvARB(GLenum target, GLuint index,
 478                                   GLfloat *params)
 479 {
 480    GLfloat *param;
 481
 482    GET_CURRENT_CONTEXT(ctx);
 483
 484    if (get_env_param_pointer(ctx, "glGetProgramEnvParameterfv",
 485                               target, index, &param)) {
 486       COPY_4V(params, param);
 487    }
 488 }
 489
 490
 491 void GLAPIENTRY
 492 _mesa_ProgramLocalParameter4fARB(GLenum target, GLuint index,
 493                                  GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 494 {
 495    GET_CURRENT_CONTEXT(ctx);
 496    GLfloat *param;
 497
 498    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 499
 500    if (get_local_param_pointer(ctx, "glProgramLocalParameterARB",
 501                                target, index, &param)) {
 502       ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
 503       ASSIGN_4V(param, x, y, z, w);
 504    }
 505 }
 506
 507
 508 void GLAPIENTRY
 509 _mesa_ProgramLocalParameter4fvARB(GLenum target, GLuint index,
 510                                   const GLfloat *params)
 511 {
 512    _mesa_ProgramLocalParameter4fARB(target, index, params[0], params[1],
 513                                     params[2], params[3]);
 514 }
 515
 516
 517 void GLAPIENTRY
 518 _mesa_ProgramLocalParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
 519                                    const GLfloat *params)
 520 {
 521    GET_CURRENT_CONTEXT(ctx);
 522    GLfloat *dest;
 523
 524    FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
 525
 526    if (count <= 0) {
 527       _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameters4fv(count)");
 528    }
 529
 530    if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
 531                                target, index, &dest)) {
 532       GLuint maxParams = target == GL_FRAGMENT_PROGRAM_ARB ?
 533          ctx->Const.FragmentProgram.MaxLocalParams :
 534          ctx->Const.VertexProgram.MaxLocalParams;
 535
 536       if ((index + count) > maxParams) {
 537          _mesa_error(ctx, GL_INVALID_VALUE,
 538                      "glProgramLocalParameters4fvEXT(index + count)");
 539          return;
 540       }
 541
 542       memcpy(dest, params, count * 4 * sizeof(GLfloat));
 543    }
 544 }
 545
 546
 547 void GLAPIENTRY
 548 _mesa_ProgramLocalParameter4dARB(GLenum target, GLuint index,
 549                                  GLdouble x, GLdouble y,
 550                                  GLdouble z, GLdouble w)
 551 {
 552    _mesa_ProgramLocalParameter4fARB(target, index, (GLfloat) x, (GLfloat) y,
 553                                     (GLfloat) z, (GLfloat) w);
 554 }
 555
 556
 557 void GLAPIENTRY
 558 _mesa_ProgramLocalParameter4dvARB(GLenum target, GLuint index,
 559                                   const GLdouble *params)
 560 {
 561    _mesa_ProgramLocalParameter4fARB(target, index,
 562                                     (GLfloat) params[0], (GLfloat) params[1],
 563                                     (GLfloat) params[2], (GLfloat) params[3]);
 564 }
 565
 566
 567 void GLAPIENTRY
 568 _mesa_GetProgramLocalParameterfvARB(GLenum target, GLuint index,
 569                                     GLfloat *params)
 570 {
 571    GLfloat *param;
 572    GET_CURRENT_CONTEXT(ctx);
 573
 574    if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
 575                                 target, index, &param)) {
 576       COPY_4V(params, param);
 577    }
 578 }
 579
 580
 581 void GLAPIENTRY
 582 _mesa_GetProgramLocalParameterdvARB(GLenum target, GLuint index,
 583                                     GLdouble *params)
 584 {
 585    GLfloat *param;
 586    GET_CURRENT_CONTEXT(ctx);
 587
 588    if (get_local_param_pointer(ctx, "glProgramLocalParameters4fvEXT",
 589                                 target, index, &param)) {
 590       COPY_4V(params, param);
 591    }
 592 }
 593
 594
 595 void GLAPIENTRY
 596 _mesa_GetProgramivARB(GLenum target, GLenum pname, GLint *params)
 597 {
 598    const struct gl_program_constants *limits;
 599    struct gl_program *prog;
 600    GET_CURRENT_CONTEXT(ctx);
 601
 602    if (target == GL_VERTEX_PROGRAM_ARB
 603        && ctx->Extensions.ARB_vertex_program) {
 604       prog = &(ctx->VertexProgram.Current->Base);
 605       limits = &ctx->Const.VertexProgram;
 606    }
 607    else if (target == GL_FRAGMENT_PROGRAM_ARB
 608             && ctx->Extensions.ARB_fragment_program) {
 609       prog = &(ctx->FragmentProgram.Current->Base);
 610       limits = &ctx->Const.FragmentProgram;
 611    }
 612    else {
 613       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(target)");
 614       return;
 615    }
 616
 617    ASSERT(prog);
 618    ASSERT(limits);
 619
 620    /* Queries supported for both vertex and fragment programs */
 621    switch (pname) {
 622       case GL_PROGRAM_LENGTH_ARB:
 623          *params
 624             = prog->String ? (GLint) strlen((char *) prog->String) : 0;
 625          return;
 626       case GL_PROGRAM_FORMAT_ARB:
 627          *params = prog->Format;
 628          return;
 629       case GL_PROGRAM_BINDING_ARB:
 630          *params = prog->Id;
 631          return;
 632       case GL_PROGRAM_INSTRUCTIONS_ARB:
 633          *params = prog->NumInstructions;
 634          return;
 635       case GL_MAX_PROGRAM_INSTRUCTIONS_ARB:
 636          *params = limits->MaxInstructions;
 637          return;
 638       case GL_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
 639          *params = prog->NumNativeInstructions;
 640          return;
 641       case GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB:
 642          *params = limits->MaxNativeInstructions;
 643          return;
 644       case GL_PROGRAM_TEMPORARIES_ARB:
 645          *params = prog->NumTemporaries;
 646          return;
 647       case GL_MAX_PROGRAM_TEMPORARIES_ARB:
 648          *params = limits->MaxTemps;
 649          return;
 650       case GL_PROGRAM_NATIVE_TEMPORARIES_ARB:
 651          *params = prog->NumNativeTemporaries;
 652          return;
 653       case GL_MAX_PROGRAM_NATIVE_TEMPORARIES_ARB:
 654          *params = limits->MaxNativeTemps;
 655          return;
 656       case GL_PROGRAM_PARAMETERS_ARB:
 657          *params = prog->NumParameters;
 658          return;
 659       case GL_MAX_PROGRAM_PARAMETERS_ARB:
 660          *params = limits->MaxParameters;
 661          return;
 662       case GL_PROGRAM_NATIVE_PARAMETERS_ARB:
 663          *params = prog->NumNativeParameters;
 664          return;
 665       case GL_MAX_PROGRAM_NATIVE_PARAMETERS_ARB:
 666          *params = limits->MaxNativeParameters;
 667          return;
 668       case GL_PROGRAM_ATTRIBS_ARB:
 669          *params = prog->NumAttributes;
 670          return;
 671       case GL_MAX_PROGRAM_ATTRIBS_ARB:
 672          *params = limits->MaxAttribs;
 673          return;
 674       case GL_PROGRAM_NATIVE_ATTRIBS_ARB:
 675          *params = prog->NumNativeAttributes;
 676          return;
 677       case GL_MAX_PROGRAM_NATIVE_ATTRIBS_ARB:
 678          *params = limits->MaxNativeAttribs;
 679          return;
 680       case GL_PROGRAM_ADDRESS_REGISTERS_ARB:
 681          *params = prog->NumAddressRegs;
 682          return;
 683       case GL_MAX_PROGRAM_ADDRESS_REGISTERS_ARB:
 684          *params = limits->MaxAddressRegs;
 685          return;
 686       case GL_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
 687          *params = prog->NumNativeAddressRegs;
 688          return;
 689       case GL_MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB:
 690          *params = limits->MaxNativeAddressRegs;
 691          return;
 692       case GL_MAX_PROGRAM_LOCAL_PARAMETERS_ARB:
 693          *params = limits->MaxLocalParams;
 694          return;
 695       case GL_MAX_PROGRAM_ENV_PARAMETERS_ARB:
 696          *params = limits->MaxEnvParams;
 697          return;
 698       case GL_PROGRAM_UNDER_NATIVE_LIMITS_ARB:
 699          /*
 700           * XXX we may not really need a driver callback here.
 701           * If the number of native instructions, registers, etc. used
 702           * are all below the maximums, we could return true.
 703           * The spec says that even if this query returns true, there's
 704           * no guarantee that the program will run in hardware.
 705           */
 706          if (prog->Id == 0) {
 707             /* default/null program */
 708             *params = GL_FALSE;
 709          }
 710          else if (ctx->Driver.IsProgramNative) {
 711             /* ask the driver */
 712             *params = ctx->Driver.IsProgramNative( ctx, target, prog );
 713          }
 714          else {
 715             /* probably running in software */
 716             *params = GL_TRUE;
 717          }
 718          return;
 719       default:
 720          /* continue with fragment-program only queries below */
 721          break;
 722    }
 723
 724    /*
 725     * The following apply to fragment programs only (at this time)
 726     */
 727    if (target == GL_FRAGMENT_PROGRAM_ARB) {
 728       const struct gl_fragment_program *fp = ctx->FragmentProgram.Current;
 729       switch (pname) {
 730          case GL_PROGRAM_ALU_INSTRUCTIONS_ARB:
 731             *params = fp->Base.NumNativeAluInstructions;
 732             return;
 733          case GL_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
 734             *params = fp->Base.NumAluInstructions;
 735             return;
 736          case GL_PROGRAM_TEX_INSTRUCTIONS_ARB:
 737             *params = fp->Base.NumTexInstructions;
 738             return;
 739          case GL_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
 740             *params = fp->Base.NumNativeTexInstructions;
 741             return;
 742          case GL_PROGRAM_TEX_INDIRECTIONS_ARB:
 743             *params = fp->Base.NumTexIndirections;
 744             return;
 745          case GL_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
 746             *params = fp->Base.NumNativeTexIndirections;
 747             return;
 748          case GL_MAX_PROGRAM_ALU_INSTRUCTIONS_ARB:
 749             *params = limits->MaxAluInstructions;
 750             return;
 751          case GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB:
 752             *params = limits->MaxNativeAluInstructions;
 753             return;
 754          case GL_MAX_PROGRAM_TEX_INSTRUCTIONS_ARB:
 755             *params = limits->MaxTexInstructions;
 756             return;
 757          case GL_MAX_PROGRAM_NATIVE_TEX_INSTRUCTIONS_ARB:
 758             *params = limits->MaxNativeTexInstructions;
 759             return;
 760          case GL_MAX_PROGRAM_TEX_INDIRECTIONS_ARB:
 761             *params = limits->MaxTexIndirections;
 762             return;
 763          case GL_MAX_PROGRAM_NATIVE_TEX_INDIRECTIONS_ARB:
 764             *params = limits->MaxNativeTexIndirections;
 765             return;
 766          default:
 767             _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
 768             return;
 769       }
 770    } else {
 771       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramivARB(pname)");
 772       return;
 773    }
 774 }
 775
 776
 777 void GLAPIENTRY
 778 _mesa_GetProgramStringARB(GLenum target, GLenum pname, GLvoid *string)
 779 {
 780    const struct gl_program *prog;
 781    char *dst = (char *) string;
 782    GET_CURRENT_CONTEXT(ctx);
 783
 784    if (target == GL_VERTEX_PROGRAM_ARB) {
 785       prog = &(ctx->VertexProgram.Current->Base);
 786    }
 787    else if (target == GL_FRAGMENT_PROGRAM_ARB) {
 788       prog = &(ctx->FragmentProgram.Current->Base);
 789    }
 790    else {
 791       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramStringARB(target)");
 792       return;
 793    }
 794
 795    ASSERT(prog);
 796
 797    if (pname != GL_PROGRAM_STRING_ARB) {
 798       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramStringARB(pname)");
 799       return;
 800    }
 801
 802    if (prog->String)
 803       memcpy(dst, prog->String, strlen((char *) prog->String));
 804    else
 805       *dst = '\0';
 806 }