src/mesa/shader/program.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.2
   4  *
   5  * Copyright (C) 1999-2004  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  * BRIAN PAUL 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 program.c
  27  * Vertex and fragment program support functions.
  28  * \author Brian Paul
  29  */
  30
  31
  32 #include "glheader.h"
  33 #include "context.h"
  34 #include "hash.h"
  35 #include "imports.h"
  36 #include "macros.h"
  37 #include "mtypes.h"
  38 #include "program.h"
  39 #include "nvfragparse.h"
  40 #include "nvfragprog.h"
  41 #include "nvvertparse.h"
  42 #include "nvvertprog.h"
  43
  44
  45 /**********************************************************************/
  46 /* Utility functions                                                  */
  47 /**********************************************************************/
  48
  49
  50 /* A pointer to this dummy program is put into the hash table when
  51  * glGenPrograms is called.
  52  */
  53 struct program _mesa_DummyProgram;
  54
  55
  56 /**
  57  * Init context's vertex/fragment program state
  58  */
  59 void
  60 _mesa_init_program(GLcontext *ctx)
  61 {
  62    GLuint i;
  63
  64    ctx->Program.ErrorPos = -1;
  65    ctx->Program.ErrorString = _mesa_strdup("");
  66
  67 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
  68    ctx->VertexProgram.Enabled = GL_FALSE;
  69    ctx->VertexProgram.PointSizeEnabled = GL_FALSE;
  70    ctx->VertexProgram.TwoSideEnabled = GL_FALSE;
  71    ctx->VertexProgram.Current = (struct vertex_program *) ctx->Shared->DefaultVertexProgram;
  72    assert(ctx->VertexProgram.Current);
  73    ctx->VertexProgram.Current->Base.RefCount++;
  74    for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
  75       ctx->VertexProgram.TrackMatrix[i] = GL_NONE;
  76       ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV;
  77    }
  78 #endif
  79
  80 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
  81    ctx->FragmentProgram.Enabled = GL_FALSE;
  82    ctx->FragmentProgram.Current = (struct fragment_program *) ctx->Shared->DefaultFragmentProgram;
  83    assert(ctx->FragmentProgram.Current);
  84    ctx->FragmentProgram.Current->Base.RefCount++;
  85 #endif
  86
  87 #if FEATURE_ATI_fragment_shader
  88    ctx->ATIFragmentShader.Enabled = GL_FALSE;
  89    ctx->ATIFragmentShader.Current = (struct ati_fragment_shader *) ctx->Shared->DefaultFragmentShader;
  90    assert(ctx->ATIFragmentShader.Current);
  91    ctx->ATIFragmentShader.Current->Base.RefCount++;
  92 #endif
  93 }
  94
  95
  96 /**
  97  * Free a context's vertex/fragment program state
  98  */
  99 void
 100 _mesa_free_program_data(GLcontext *ctx)
 101 {
 102 #if FEATURE_NV_vertex_program
 103    if (ctx->VertexProgram.Current) {
 104       ctx->VertexProgram.Current->Base.RefCount--;
 105       if (ctx->VertexProgram.Current->Base.RefCount <= 0)
 106          ctx->Driver.DeleteProgram(ctx, &(ctx->VertexProgram.Current->Base));
 107    }
 108 #endif
 109 #if FEATURE_NV_fragment_program
 110    if (ctx->FragmentProgram.Current) {
 111       ctx->FragmentProgram.Current->Base.RefCount--;
 112       if (ctx->FragmentProgram.Current->Base.RefCount <= 0)
 113          ctx->Driver.DeleteProgram(ctx, &(ctx->FragmentProgram.Current->Base));
 114    }
 115 #endif
 116 #if FEATURE_ATI_fragment_shader
 117    if (ctx->ATIFragmentShader.Current) {
 118       ctx->ATIFragmentShader.Current->Base.RefCount--;
 119       if (ctx->ATIFragmentShader.Current->Base.RefCount <= 0)
 120         ctx->Driver.DeleteProgram(ctx, &(ctx->ATIFragmentShader.Current->Base));
 121    }
 122 #endif
 123    _mesa_free((void *) ctx->Program.ErrorString);
 124 }
 125
 126
 127
 128
 129 /**
 130  * Set the vertex/fragment program error state (position and error string).
 131  * This is generally called from within the parsers.
 132  */
 133 void
 134 _mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string)
 135 {
 136    ctx->Program.ErrorPos = pos;
 137    _mesa_free((void *) ctx->Program.ErrorString);
 138    if (!string)
 139       string = "";
 140    ctx->Program.ErrorString = _mesa_strdup(string);
 141 }
 142
 143
 144 /**
 145  * Find the line number and column for 'pos' within 'string'.
 146  * Return a copy of the line which contains 'pos'.  Free the line with
 147  * _mesa_free().
 148  * \param string  the program string
 149  * \param pos     the position within the string
 150  * \param line    returns the line number corresponding to 'pos'.
 151  * \param col     returns the column number corresponding to 'pos'.
 152  * \return copy of the line containing 'pos'.
 153  */
 154 const GLubyte *
 155 _mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
 156                        GLint *line, GLint *col)
 157 {
 158    const GLubyte *lineStart = string;
 159    const GLubyte *p = string;
 160    GLubyte *s;
 161    int len;
 162
 163    *line = 1;
 164
 165    while (p != pos) {
 166       if (*p == (GLubyte) '\n') {
 167          (*line)++;
 168          lineStart = p + 1;
 169       }
 170       p++;
 171    }
 172
 173    *col = (pos - lineStart) + 1;
 174
 175    /* return copy of this line */
 176    while (*p != 0 && *p != '\n')
 177       p++;
 178    len = p - lineStart;
 179    s = (GLubyte *) _mesa_malloc(len + 1);
 180    _mesa_memcpy(s, lineStart, len);
 181    s[len] = 0;
 182
 183    return s;
 184 }
 185
 186
 187 /**
 188  * Initialize a new vertex/fragment program object.
 189  */
 190 static struct program *
 191 _mesa_init_program_struct( GLcontext *ctx, struct program *prog,
 192                            GLenum target, GLuint id)
 193 {
 194    (void) ctx;
 195    if (prog) {
 196       prog->Id = id;
 197       prog->Target = target;
 198       prog->Resident = GL_TRUE;
 199       prog->RefCount = 1;
 200    }
 201
 202    return prog;
 203 }
 204
 205
 206 /**
 207  * Initialize a new fragment program object.
 208  */
 209 struct program *
 210 _mesa_init_fragment_program( GLcontext *ctx, struct fragment_program *prog,
 211                              GLenum target, GLuint id)
 212 {
 213    if (prog)
 214       return _mesa_init_program_struct( ctx, &prog->Base, target, id );
 215    else
 216       return NULL;
 217 }
 218
 219
 220 /**
 221  * Initialize a new vertex program object.
 222  */
 223 struct program *
 224 _mesa_init_vertex_program( GLcontext *ctx, struct vertex_program *prog,
 225                            GLenum target, GLuint id)
 226 {
 227    if (prog)
 228       return _mesa_init_program_struct( ctx, &prog->Base, target, id );
 229    else
 230       return NULL;
 231 }
 232
 233 /**
 234  * Initialize a new ATI fragment shader object.
 235  */
 236 struct program *
 237 _mesa_init_ati_fragment_shader( GLcontext *ctx,
 238                                 struct ati_fragment_shader *prog,
 239                                 GLenum target, GLuint id )
 240 {
 241    if (prog)
 242       return _mesa_init_program_struct( ctx, &prog->Base, target, id );
 243    else
 244       return NULL;
 245 }
 246
 247
 248
 249 /**
 250  * Allocate and initialize a new fragment/vertex program object but
 251  * don't put it into the program hash table.  Called via
 252  * ctx->Driver.NewProgram.  May be overridden (ie. replaced) by a
 253  * device driver function to implement OO deriviation with additional
 254  * types not understood by this function.
 255  *
 256  * \param ctx  context
 257  * \param id   program id/number
 258  * \param target  program target/type
 259  * \return  pointer to new program object
 260  */
 261 struct program *
 262 _mesa_new_program(GLcontext *ctx, GLenum target, GLuint id)
 263 {
 264    switch (target) {
 265    case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
 266       return _mesa_init_vertex_program( ctx, CALLOC_STRUCT(vertex_program),
 267                                         target, id );
 268    case GL_FRAGMENT_PROGRAM_NV:
 269    case GL_FRAGMENT_PROGRAM_ARB:
 270       return _mesa_init_fragment_program( ctx, CALLOC_STRUCT(fragment_program),
 271                                           target, id );
 272    case GL_FRAGMENT_SHADER_ATI:
 273       return _mesa_init_ati_fragment_shader( ctx, CALLOC_STRUCT(ati_fragment_shader),
 274                                           target, id );
 275
 276    default:
 277       _mesa_problem(ctx, "bad target in _mesa_new_program");
 278       return NULL;
 279    }
 280 }
 281
 282
 283 /**
 284  * Delete a program and remove it from the hash table, ignoring the
 285  * reference count.
 286  * Called via ctx->Driver.DeleteProgram.  May be wrapped (OO deriviation)
 287  * by a device driver function.
 288  */
 289 void
 290 _mesa_delete_program(GLcontext *ctx, struct program *prog)
 291 {
 292    (void) ctx;
 293    ASSERT(prog);
 294
 295    if (prog->String)
 296       _mesa_free(prog->String);
 297    if (prog->Target == GL_VERTEX_PROGRAM_NV ||
 298        prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
 299       struct vertex_program *vprog = (struct vertex_program *) prog;
 300       if (vprog->Instructions) {
 301          GLuint i;
 302          for (i = 0; i < vprog->Base.NumInstructions; i++) {
 303             if (vprog->Instructions[i].Data)
 304                _mesa_free(vprog->Instructions[i].Data);
 305          }
 306          _mesa_free(vprog->Instructions);
 307       }
 308       if (vprog->Parameters)
 309          _mesa_free_parameter_list(vprog->Parameters);
 310    }
 311    else if (prog->Target == GL_FRAGMENT_PROGRAM_NV ||
 312             prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
 313       struct fragment_program *fprog = (struct fragment_program *) prog;
 314       if (fprog->Instructions) {
 315          GLuint i;
 316          for (i = 0; i < fprog->Base.NumInstructions; i++) {
 317             if (fprog->Instructions[i].Data)
 318                _mesa_free(fprog->Instructions[i].Data);
 319          }
 320          _mesa_free(fprog->Instructions);
 321       }
 322       if (fprog->Parameters)
 323          _mesa_free_parameter_list(fprog->Parameters);
 324    }
 325    else if (prog->Target == GL_FRAGMENT_SHADER_ATI) {
 326       struct ati_fragment_shader *atifs = (struct ati_fragment_shader *)prog;
 327       if (atifs->Instructions)
 328          _mesa_free(atifs->Instructions);
 329    }
 330
 331    _mesa_free(prog);
 332 }
 333
 334
 335
 336 /**********************************************************************/
 337 /* Program parameter functions                                        */
 338 /**********************************************************************/
 339
 340 struct program_parameter_list *
 341 _mesa_new_parameter_list(void)
 342 {
 343    return (struct program_parameter_list *)
 344       _mesa_calloc(sizeof(struct program_parameter_list));
 345 }
 346
 347
 348 /**
 349  * Free a parameter list and all its parameters
 350  */
 351 void
 352 _mesa_free_parameter_list(struct program_parameter_list *paramList)
 353 {
 354    _mesa_free_parameters(paramList);
 355    _mesa_free(paramList);
 356 }
 357
 358
 359 /**
 360  * Free all the parameters in the given list, but don't free the
 361  * paramList structure itself.
 362  */
 363 void
 364 _mesa_free_parameters(struct program_parameter_list *paramList)
 365 {
 366    GLuint i;
 367    for (i = 0; i < paramList->NumParameters; i++) {
 368       _mesa_free((void *) paramList->Parameters[i].Name);
 369    }
 370    _mesa_free(paramList->Parameters);
 371    _mesa_free(paramList->ParameterValues);
 372    paramList->NumParameters = 0;
 373    paramList->Parameters = NULL;
 374 }
 375
 376
 377 /**
 378  * Helper function used by the functions below.
 379  */
 380 static GLint
 381 add_parameter(struct program_parameter_list *paramList,
 382               const char *name, const GLfloat values[4],
 383               enum parameter_type type)
 384 {
 385    const GLuint n = paramList->NumParameters;
 386
 387    paramList->Parameters = (struct program_parameter *)
 388       _mesa_realloc(paramList->Parameters,
 389                     n * sizeof(struct program_parameter),
 390                     (n + 1) * sizeof(struct program_parameter));
 391    paramList->ParameterValues = (GLfloat (*)[4])
 392       _mesa_realloc(paramList->ParameterValues,
 393                     n * 4 * sizeof(GLfloat),
 394                     (n + 1) * 4 * sizeof(GLfloat));
 395
 396    if (!paramList->Parameters ||
 397        !paramList->ParameterValues) {
 398       /* out of memory */
 399       paramList->NumParameters = 0;
 400       return -1;
 401    }
 402    else {
 403       paramList->NumParameters = n + 1;
 404       paramList->Parameters[n].Name = _mesa_strdup(name);
 405       paramList->Parameters[n].Type = type;
 406       if (values)
 407          COPY_4V(paramList->ParameterValues[n], values);
 408       return (GLint) n;
 409    }
 410 }
 411
 412
 413 /**
 414  * Add a new named program parameter (Ex: NV_fragment_program DEFINE statement)
 415  * \return index of the new entry in the parameter list
 416  */
 417 GLint
 418 _mesa_add_named_parameter(struct program_parameter_list *paramList,
 419                           const char *name, const GLfloat values[4])
 420 {
 421    return add_parameter(paramList, name, values, NAMED_PARAMETER);
 422 }
 423
 424
 425 /**
 426  * Add a new unnamed constant to the parameter list.
 427  * \param paramList - the parameter list
 428  * \param values - four float values
 429  * \return index of the new parameter.
 430  */
 431 GLint
 432 _mesa_add_named_constant(struct program_parameter_list *paramList,
 433                          const char *name, const GLfloat values[4])
 434 {
 435    return add_parameter(paramList, name, values, CONSTANT);
 436 }
 437
 438
 439 /**
 440  * Add a new unnamed constant to the parameter list.
 441  * \param paramList - the parameter list
 442  * \param values - four float values
 443  * \return index of the new parameter.
 444  */
 445 GLint
 446 _mesa_add_unnamed_constant(struct program_parameter_list *paramList,
 447                            const GLfloat values[4])
 448 {
 449    /* generate a new dummy name */
 450    static GLuint n = 0;
 451    char name[20];
 452    _mesa_sprintf(name, "constant%d", n);
 453    n++;
 454    /* store it */
 455    return add_parameter(paramList, name, values, CONSTANT);
 456 }
 457
 458
 459 /**
 460  * Add a new state reference to the parameter list.
 461  * \param paramList - the parameter list
 462  * \param state     - an array of 6 state tokens
 463  *
 464  * \return index of the new parameter.
 465  */
 466 GLint
 467 _mesa_add_state_reference(struct program_parameter_list *paramList,
 468                           GLint *stateTokens)
 469 {
 470    /* XXX Should we parse <stateString> here and produce the parameter's
 471     * list of STATE_* tokens here, or in the parser?
 472     */
 473    GLint a, idx;
 474
 475    idx = add_parameter(paramList, "Some State", NULL, STATE);
 476
 477    for (a=0; a<6; a++)
 478       paramList->Parameters[idx].StateIndexes[a] = (enum state_index) stateTokens[a];
 479
 480    return idx;
 481 }
 482
 483
 484 /**
 485  * Lookup a parameter value by name in the given parameter list.
 486  * \return pointer to the float[4] values.
 487  */
 488 GLfloat *
 489 _mesa_lookup_parameter_value(struct program_parameter_list *paramList,
 490                              GLsizei nameLen, const char *name)
 491 {
 492    GLuint i;
 493
 494    if (!paramList)
 495       return NULL;
 496
 497    if (nameLen == -1) {
 498       /* name is null-terminated */
 499       for (i = 0; i < paramList->NumParameters; i++) {
 500          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 501             return paramList->ParameterValues[i];
 502       }
 503    }
 504    else {
 505       /* name is not null-terminated, use nameLen */
 506       for (i = 0; i < paramList->NumParameters; i++) {
 507          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 508              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 509             return paramList->ParameterValues[i];
 510       }
 511    }
 512    return NULL;
 513 }
 514
 515
 516 /**
 517  * Lookup a parameter index by name in the given parameter list.
 518  * \return index of parameter in the list.
 519  */
 520 GLint
 521 _mesa_lookup_parameter_index(struct program_parameter_list *paramList,
 522                              GLsizei nameLen, const char *name)
 523 {
 524    GLint i;
 525
 526    if (!paramList)
 527       return -1;
 528
 529    if (nameLen == -1) {
 530       /* name is null-terminated */
 531       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 532          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 533             return i;
 534       }
 535    }
 536    else {
 537       /* name is not null-terminated, use nameLen */
 538       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 539          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 540              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 541             return i;
 542       }
 543    }
 544    return -1;
 545 }
 546
 547
 548 /**
 549  * Use the list of tokens in the state[] array to find global GL state
 550  * and return it in <value>.  Usually, four values are returned in <value>
 551  * but matrix queries may return as many as 16 values.
 552  * This function is used for ARB vertex/fragment programs.
 553  * The program parser will produce the state[] values.
 554  */
 555 static void
 556 _mesa_fetch_state(GLcontext *ctx, const enum state_index state[],
 557                   GLfloat *value)
 558 {
 559    switch (state[0]) {
 560    case STATE_MATERIAL:
 561       {
 562          /* state[1] is either 0=front or 1=back side */
 563          const GLuint face = (GLuint) state[1];
 564          /* state[2] is the material attribute */
 565          switch (state[2]) {
 566          case STATE_AMBIENT:
 567             if (face == 0)
 568                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT]);
 569             else
 570                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT]);
 571             return;
 572          case STATE_DIFFUSE:
 573             if (face == 0)
 574                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE]);
 575             else
 576                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE]);
 577             return;
 578          case STATE_SPECULAR:
 579             if (face == 0)
 580                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR]);
 581             else
 582                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SPECULAR]);
 583             return;
 584          case STATE_EMISSION:
 585             if (face == 0)
 586                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION]);
 587             else
 588                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION]);
 589             return;
 590          case STATE_SHININESS:
 591             if (face == 0)
 592                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS][0];
 593             else
 594                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SHININESS][0];
 595             value[1] = 0.0F;
 596             value[2] = 0.0F;
 597             value[3] = 1.0F;
 598             return;
 599          default:
 600             _mesa_problem(ctx, "Invalid material state in fetch_state");
 601             return;
 602          }
 603       }
 604    case STATE_LIGHT:
 605       {
 606          /* state[1] is the light number */
 607          const GLuint ln = (GLuint) state[1];
 608          /* state[2] is the light attribute */
 609          switch (state[2]) {
 610          case STATE_AMBIENT:
 611             COPY_4V(value, ctx->Light.Light[ln].Ambient);
 612             return;
 613          case STATE_DIFFUSE:
 614             COPY_4V(value, ctx->Light.Light[ln].Diffuse);
 615             return;
 616          case STATE_SPECULAR:
 617             COPY_4V(value, ctx->Light.Light[ln].Specular);
 618             return;
 619          case STATE_POSITION:
 620             COPY_4V(value, ctx->Light.Light[ln].EyePosition);
 621             return;
 622          case STATE_ATTENUATION:
 623             value[0] = ctx->Light.Light[ln].ConstantAttenuation;
 624             value[1] = ctx->Light.Light[ln].LinearAttenuation;
 625             value[2] = ctx->Light.Light[ln].QuadraticAttenuation;
 626             value[3] = ctx->Light.Light[ln].SpotExponent;
 627             return;
 628          case STATE_SPOT_DIRECTION:
 629             COPY_3V(value, ctx->Light.Light[ln].EyeDirection);
 630             value[3] = ctx->Light.Light[ln]._CosCutoff;
 631             return;
 632          case STATE_HALF:
 633             {
 634                GLfloat eye_z[] = {0, 0, 1};
 635
 636                /* Compute infinite half angle vector:
 637                 *   half-vector = light_position + (0, 0, 1)
 638                 * and then normalize.  w = 0
 639                 *
 640                 * light.EyePosition.w should be 0 for infinite lights.
 641                 */
 642                ADD_3V(value, eye_z, ctx->Light.Light[ln].EyePosition);
 643                NORMALIZE_3FV(value);
 644                value[3] = 0;
 645             }
 646             return;
 647          case STATE_POSITION_NORMALIZED:
 648             COPY_4V(value, ctx->Light.Light[ln].EyePosition);
 649             NORMALIZE_3FV( value );
 650             return;
 651          default:
 652             _mesa_problem(ctx, "Invalid light state in fetch_state");
 653             return;
 654          }
 655       }
 656    case STATE_LIGHTMODEL_AMBIENT:
 657       COPY_4V(value, ctx->Light.Model.Ambient);
 658       return;
 659    case STATE_LIGHTMODEL_SCENECOLOR:
 660       if (state[1] == 0) {
 661          /* front */
 662          GLint i;
 663          for (i = 0; i < 3; i++) {
 664             value[i] = ctx->Light.Model.Ambient[i]
 665                * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]
 666                + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];
 667          }
 668          value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
 669       }
 670       else {
 671          /* back */
 672          GLint i;
 673          for (i = 0; i < 3; i++) {
 674             value[i] = ctx->Light.Model.Ambient[i]
 675                * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]
 676                + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];
 677          }
 678          value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
 679       }
 680       return;
 681    case STATE_LIGHTPROD:
 682       {
 683          const GLuint ln = (GLuint) state[1];
 684          const GLuint face = (GLuint) state[2];
 685          GLint i;
 686          ASSERT(face == 0 || face == 1);
 687          switch (state[3]) {
 688             case STATE_AMBIENT:
 689                for (i = 0; i < 3; i++) {
 690                   value[i] = ctx->Light.Light[ln].Ambient[i] *
 691                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];
 692                }
 693                /* [3] = material alpha */
 694                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 695                return;
 696             case STATE_DIFFUSE:
 697                for (i = 0; i < 3; i++) {
 698                   value[i] = ctx->Light.Light[ln].Diffuse[i] *
 699                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];
 700                }
 701                /* [3] = material alpha */
 702                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 703                return;
 704             case STATE_SPECULAR:
 705                for (i = 0; i < 3; i++) {
 706                   value[i] = ctx->Light.Light[ln].Specular[i] *
 707                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];
 708                }
 709                /* [3] = material alpha */
 710                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 711                return;
 712             default:
 713                _mesa_problem(ctx, "Invalid lightprod state in fetch_state");
 714                return;
 715          }
 716       }
 717    case STATE_TEXGEN:
 718       {
 719          /* state[1] is the texture unit */
 720          const GLuint unit = (GLuint) state[1];
 721          /* state[2] is the texgen attribute */
 722          switch (state[2]) {
 723          case STATE_TEXGEN_EYE_S:
 724             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneS);
 725             return;
 726          case STATE_TEXGEN_EYE_T:
 727             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneT);
 728             return;
 729          case STATE_TEXGEN_EYE_R:
 730             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneR);
 731             return;
 732          case STATE_TEXGEN_EYE_Q:
 733             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneQ);
 734             return;
 735          case STATE_TEXGEN_OBJECT_S:
 736             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneS);
 737             return;
 738          case STATE_TEXGEN_OBJECT_T:
 739             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneT);
 740             return;
 741          case STATE_TEXGEN_OBJECT_R:
 742             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneR);
 743             return;
 744          case STATE_TEXGEN_OBJECT_Q:
 745             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneQ);
 746             return;
 747          default:
 748             _mesa_problem(ctx, "Invalid texgen state in fetch_state");
 749             return;
 750          }
 751       }
 752    case STATE_TEXENV_COLOR:
 753       {
 754          /* state[1] is the texture unit */
 755          const GLuint unit = (GLuint) state[1];
 756          COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);
 757       }
 758       return;
 759    case STATE_FOG_COLOR:
 760       COPY_4V(value, ctx->Fog.Color);
 761       return;
 762    case STATE_FOG_PARAMS:
 763       value[0] = ctx->Fog.Density;
 764       value[1] = ctx->Fog.Start;
 765       value[2] = ctx->Fog.End;
 766       value[3] = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
 767       return;
 768    case STATE_CLIPPLANE:
 769       {
 770          const GLuint plane = (GLuint) state[1];
 771          COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);
 772       }
 773       return;
 774    case STATE_POINT_SIZE:
 775       value[0] = ctx->Point.Size;
 776       value[1] = ctx->Point.MinSize;
 777       value[2] = ctx->Point.MaxSize;
 778       value[3] = ctx->Point.Threshold;
 779       return;
 780    case STATE_POINT_ATTENUATION:
 781       value[0] = ctx->Point.Params[0];
 782       value[1] = ctx->Point.Params[1];
 783       value[2] = ctx->Point.Params[2];
 784       value[3] = 1.0F;
 785       return;
 786    case STATE_MATRIX:
 787       {
 788          /* state[1] = modelview, projection, texture, etc. */
 789          /* state[2] = which texture matrix or program matrix */
 790          /* state[3] = first column to fetch */
 791          /* state[4] = last column to fetch */
 792          /* state[5] = transpose, inverse or invtrans */
 793
 794          const GLmatrix *matrix;
 795          const enum state_index mat = state[1];
 796          const GLuint index = (GLuint) state[2];
 797          const GLuint first = (GLuint) state[3];
 798          const GLuint last = (GLuint) state[4];
 799          const enum state_index modifier = state[5];
 800          const GLfloat *m;
 801          GLuint row, i;
 802          if (mat == STATE_MODELVIEW) {
 803             matrix = ctx->ModelviewMatrixStack.Top;
 804          }
 805          else if (mat == STATE_PROJECTION) {
 806             matrix = ctx->ProjectionMatrixStack.Top;
 807          }
 808          else if (mat == STATE_MVP) {
 809             matrix = &ctx->_ModelProjectMatrix;
 810          }
 811          else if (mat == STATE_TEXTURE) {
 812             matrix = ctx->TextureMatrixStack[index].Top;
 813          }
 814          else if (mat == STATE_PROGRAM) {
 815             matrix = ctx->ProgramMatrixStack[index].Top;
 816          }
 817          else {
 818             _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");
 819             return;
 820          }
 821          if (modifier == STATE_MATRIX_INVERSE ||
 822              modifier == STATE_MATRIX_INVTRANS) {
 823             /* Be sure inverse is up to date:
 824              */
 825             _math_matrix_analyse( (GLmatrix*) matrix );
 826             m = matrix->inv;
 827          }
 828          else {
 829             m = matrix->m;
 830          }
 831          if (modifier == STATE_MATRIX_TRANSPOSE ||
 832              modifier == STATE_MATRIX_INVTRANS) {
 833             for (i = 0, row = first; row <= last; row++) {
 834                value[i++] = m[row * 4 + 0];
 835                value[i++] = m[row * 4 + 1];
 836                value[i++] = m[row * 4 + 2];
 837                value[i++] = m[row * 4 + 3];
 838             }
 839          }
 840          else {
 841             for (i = 0, row = first; row <= last; row++) {
 842                value[i++] = m[row + 0];
 843                value[i++] = m[row + 4];
 844                value[i++] = m[row + 8];
 845                value[i++] = m[row + 12];
 846             }
 847          }
 848       }
 849       return;
 850    case STATE_DEPTH_RANGE:
 851       value[0] = ctx->Viewport.Near;                     /* near       */
 852       value[1] = ctx->Viewport.Far;                      /* far        */
 853       value[2] = ctx->Viewport.Far - ctx->Viewport.Near; /* far - near */
 854       value[3] = 0;
 855       return;
 856    case STATE_FRAGMENT_PROGRAM:
 857       {
 858          /* state[1] = {STATE_ENV, STATE_LOCAL} */
 859          /* state[2] = parameter index          */
 860          const int idx = (int) state[2];
 861          switch (state[1]) {
 862             case STATE_ENV:
 863                COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);
 864                break;
 865             case STATE_LOCAL:
 866                COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]);
 867                break;
 868             default:
 869                _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
 870                return;
 871          }
 872       }
 873       return;
 874
 875    case STATE_VERTEX_PROGRAM:
 876       {
 877          /* state[1] = {STATE_ENV, STATE_LOCAL} */
 878          /* state[2] = parameter index          */
 879          const int idx = (int) state[2];
 880          switch (state[1]) {
 881             case STATE_ENV:
 882                COPY_4V(value, ctx->VertexProgram.Parameters[idx]);
 883                break;
 884             case STATE_LOCAL:
 885                COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]);
 886                break;
 887             default:
 888                _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
 889                return;
 890          }
 891       }
 892       return;
 893
 894    case STATE_INTERNAL:
 895       {
 896          switch (state[1]) {
 897             case STATE_NORMAL_SCALE:
 898                ASSIGN_4V(value, ctx->_ModelViewInvScale, 0, 0, 1);
 899                break;
 900             default:
 901                _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
 902                return;
 903          }
 904       }
 905       return;
 906
 907    default:
 908       _mesa_problem(ctx, "Invalid state in _mesa_fetch_state");
 909       return;
 910    }
 911 }
 912
 913
 914 /**
 915  * Loop over all the parameters in a parameter list.  If the parameter
 916  * is a GL state reference, look up the current value of that state
 917  * variable and put it into the parameter's Value[4] array.
 918  * This would be called at glBegin time when using a fragment program.
 919  */
 920 void
 921 _mesa_load_state_parameters(GLcontext *ctx,
 922                             struct program_parameter_list *paramList)
 923 {
 924    GLuint i;
 925
 926    if (!paramList)
 927       return;
 928
 929    for (i = 0; i < paramList->NumParameters; i++) {
 930       if (paramList->Parameters[i].Type == STATE) {
 931          _mesa_fetch_state(ctx,
 932                            paramList->Parameters[i].StateIndexes,
 933                            paramList->ParameterValues[i]);
 934       }
 935    }
 936 }
 937
 938
 939
 940 /**********************************************************************/
 941 /* API functions                                                      */
 942 /**********************************************************************/
 943
 944
 945 /**
 946  * Bind a program (make it current)
 947  * \note Called from the GL API dispatcher by both glBindProgramNV
 948  * and glBindProgramARB.
 949  */
 950 void GLAPIENTRY
 951 _mesa_BindProgram(GLenum target, GLuint id)
 952 {
 953    struct program *prog;
 954    GET_CURRENT_CONTEXT(ctx);
 955    ASSERT_OUTSIDE_BEGIN_END(ctx);
 956
 957    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 958
 959    if ((target == GL_VERTEX_PROGRAM_NV
 960         && ctx->Extensions.NV_vertex_program) ||
 961        (target == GL_VERTEX_PROGRAM_ARB
 962         && ctx->Extensions.ARB_vertex_program)) {
 963       /*** Vertex program binding ***/
 964       struct vertex_program *curProg = ctx->VertexProgram.Current;
 965       if (curProg->Base.Id == id) {
 966          /* binding same program - no change */
 967          return;
 968       }
 969       if (curProg->Base.Id != 0) {
 970          /* decrement refcount on previously bound vertex program */
 971          curProg->Base.RefCount--;
 972          /* and delete if refcount goes below one */
 973          if (curProg->Base.RefCount <= 0) {
 974             /* the program ID was already removed from the hash table */
 975             ctx->Driver.DeleteProgram(ctx, &(curProg->Base));
 976          }
 977       }
 978    }
 979    else if ((target == GL_FRAGMENT_PROGRAM_NV
 980              && ctx->Extensions.NV_fragment_program) ||
 981             (target == GL_FRAGMENT_PROGRAM_ARB
 982              && ctx->Extensions.ARB_fragment_program)) {
 983       /*** Fragment program binding ***/
 984       struct fragment_program *curProg = ctx->FragmentProgram.Current;
 985       if (curProg->Base.Id == id) {
 986          /* binding same program - no change */
 987          return;
 988       }
 989       if (curProg->Base.Id != 0) {
 990          /* decrement refcount on previously bound fragment program */
 991          curProg->Base.RefCount--;
 992          /* and delete if refcount goes below one */
 993          if (curProg->Base.RefCount <= 0) {
 994             /* the program ID was already removed from the hash table */
 995             ctx->Driver.DeleteProgram(ctx, &(curProg->Base));
 996          }
 997       }
 998    }
 999    else {
1000       _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramNV/ARB(target)");
1001       return;
1002    }
1003
1004    /* NOTE: binding to a non-existant program is not an error.
1005     * That's supposed to be caught in glBegin.
1006     */
1007    if (id == 0) {
1008       /* Bind default program */
1009       prog = NULL;
1010       if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB)
1011          prog = ctx->Shared->DefaultVertexProgram;
1012       else
1013          prog = ctx->Shared->DefaultFragmentProgram;
1014    }
1015    else {
1016       /* Bind user program */
1017       prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, id);
1018       if (!prog || prog == &_mesa_DummyProgram) {
1019          /* allocate a new program now */
1020          prog = ctx->Driver.NewProgram(ctx, target, id);
1021          if (!prog) {
1022             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramNV/ARB");
1023             return;
1024          }
1025          _mesa_HashInsert(ctx->Shared->Programs, id, prog);
1026       }
1027       else if (prog->Target != target) {
1028          _mesa_error(ctx, GL_INVALID_OPERATION,
1029                      "glBindProgramNV/ARB(target mismatch)");
1030          return;
1031       }
1032    }
1033
1034    /* bind now */
1035    if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB) {
1036       ctx->VertexProgram.Current = (struct vertex_program *) prog;
1037    }
1038    else if (target == GL_FRAGMENT_PROGRAM_NV || target == GL_FRAGMENT_PROGRAM_ARB) {
1039       ctx->FragmentProgram.Current = (struct fragment_program *) prog;
1040    }
1041
1042    /* Never null pointers */
1043    ASSERT(ctx->VertexProgram.Current);
1044    ASSERT(ctx->FragmentProgram.Current);
1045
1046    if (prog)
1047       prog->RefCount++;
1048
1049    if (ctx->Driver.BindProgram)
1050       ctx->Driver.BindProgram(ctx, target, prog);
1051 }
1052
1053
1054 /**
1055  * Delete a list of programs.
1056  * \note Not compiled into display lists.
1057  * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
1058  */
1059 void GLAPIENTRY
1060 _mesa_DeletePrograms(GLsizei n, const GLuint *ids)
1061 {
1062    GLint i;
1063    GET_CURRENT_CONTEXT(ctx);
1064    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1065
1066    if (n < 0) {
1067       _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
1068       return;
1069    }
1070
1071    for (i = 0; i < n; i++) {
1072       if (ids[i] != 0) {
1073          struct program *prog = (struct program *)
1074             _mesa_HashLookup(ctx->Shared->Programs, ids[i]);
1075          if (prog == &_mesa_DummyProgram) {
1076             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
1077          }
1078          else if (prog) {
1079             /* Unbind program if necessary */
1080             if (prog->Target == GL_VERTEX_PROGRAM_NV ||
1081                 prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
1082                if (ctx->VertexProgram.Current &&
1083                    ctx->VertexProgram.Current->Base.Id == ids[i]) {
1084                   /* unbind this currently bound program */
1085                   _mesa_BindProgram(prog->Target, 0);
1086                }
1087             }
1088             else if (prog->Target == GL_FRAGMENT_PROGRAM_NV ||
1089                      prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
1090                if (ctx->FragmentProgram.Current &&
1091                    ctx->FragmentProgram.Current->Base.Id == ids[i]) {
1092                   /* unbind this currently bound program */
1093                   _mesa_BindProgram(prog->Target, 0);
1094                }
1095             }
1096             else {
1097                _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
1098                return;
1099             }
1100             /* The ID is immediately available for re-use now */
1101             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
1102             prog->RefCount--;
1103             if (prog->RefCount <= 0) {
1104                ctx->Driver.DeleteProgram(ctx, prog);
1105             }
1106          }
1107       }
1108    }
1109 }
1110
1111
1112 /**
1113  * Generate a list of new program identifiers.
1114  * \note Not compiled into display lists.
1115  * \note Called by both glGenProgramsNV and glGenProgramsARB.
1116  */
1117 void GLAPIENTRY
1118 _mesa_GenPrograms(GLsizei n, GLuint *ids)
1119 {
1120    GLuint first;
1121    GLuint i;
1122    GET_CURRENT_CONTEXT(ctx);
1123    ASSERT_OUTSIDE_BEGIN_END(ctx);
1124
1125    if (n < 0) {
1126       _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
1127       return;
1128    }
1129
1130    if (!ids)
1131       return;
1132
1133    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
1134
1135    /* Insert pointer to dummy program as placeholder */
1136    for (i = 0; i < (GLuint) n; i++) {
1137       _mesa_HashInsert(ctx->Shared->Programs, first + i, &_mesa_DummyProgram);
1138    }
1139
1140    /* Return the program names */
1141    for (i = 0; i < (GLuint) n; i++) {
1142       ids[i] = first + i;
1143    }
1144 }
1145
1146
1147 /**
1148  * Determine if id names a vertex or fragment program.
1149  * \note Not compiled into display lists.
1150  * \note Called from both glIsProgramNV and glIsProgramARB.
1151  * \param id is the program identifier
1152  * \return GL_TRUE if id is a program, else GL_FALSE.
1153  */
1154 GLboolean GLAPIENTRY
1155 _mesa_IsProgram(GLuint id)
1156 {
1157    GET_CURRENT_CONTEXT(ctx);
1158    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1159
1160    if (id == 0)
1161       return GL_FALSE;
1162
1163    if (_mesa_HashLookup(ctx->Shared->Programs, id))
1164       return GL_TRUE;
1165    else
1166       return GL_FALSE;
1167 }
1168
1169
1170
1171 /**********************************************************************/
1172 /* GL_MESA_program_debug extension                                    */
1173 /**********************************************************************/
1174
1175
1176 /* XXX temporary */
1177 GLAPI void GLAPIENTRY
1178 glProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
1179                       GLvoid *data)
1180 {
1181    _mesa_ProgramCallbackMESA(target, callback, data);
1182 }
1183
1184
1185 void
1186 _mesa_ProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
1187                           GLvoid *data)
1188 {
1189    GET_CURRENT_CONTEXT(ctx);
1190
1191    switch (target) {
1192       case GL_FRAGMENT_PROGRAM_ARB:
1193          if (!ctx->Extensions.ARB_fragment_program) {
1194             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1195             return;
1196          }
1197          ctx->FragmentProgram.Callback = callback;
1198          ctx->FragmentProgram.CallbackData = data;
1199          break;
1200       case GL_FRAGMENT_PROGRAM_NV:
1201          if (!ctx->Extensions.NV_fragment_program) {
1202             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1203             return;
1204          }
1205          ctx->FragmentProgram.Callback = callback;
1206          ctx->FragmentProgram.CallbackData = data;
1207          break;
1208       case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
1209          if (!ctx->Extensions.ARB_vertex_program &&
1210              !ctx->Extensions.NV_vertex_program) {
1211             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1212             return;
1213          }
1214          ctx->VertexProgram.Callback = callback;
1215          ctx->VertexProgram.CallbackData = data;
1216          break;
1217       default:
1218          _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1219          return;
1220    }
1221 }
1222
1223
1224 /* XXX temporary */
1225 GLAPI void GLAPIENTRY
1226 glGetProgramRegisterfvMESA(GLenum target,
1227                            GLsizei len, const GLubyte *registerName,
1228                            GLfloat *v)
1229 {
1230    _mesa_GetProgramRegisterfvMESA(target, len, registerName, v);
1231 }
1232
1233
1234 void
1235 _mesa_GetProgramRegisterfvMESA(GLenum target,
1236                                GLsizei len, const GLubyte *registerName,
1237                                GLfloat *v)
1238 {
1239    char reg[1000];
1240    GET_CURRENT_CONTEXT(ctx);
1241
1242    /* We _should_ be inside glBegin/glEnd */
1243 #if 0
1244    if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
1245       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA");
1246       return;
1247    }
1248 #endif
1249
1250    /* make null-terminated copy of registerName */
1251    len = MIN2((unsigned int) len, sizeof(reg) - 1);
1252    _mesa_memcpy(reg, registerName, len);
1253    reg[len] = 0;
1254
1255    switch (target) {
1256       case GL_VERTEX_PROGRAM_NV:
1257          if (!ctx->Extensions.ARB_vertex_program &&
1258              !ctx->Extensions.NV_vertex_program) {
1259             _mesa_error(ctx, GL_INVALID_ENUM,
1260                         "glGetProgramRegisterfvMESA(target)");
1261             return;
1262          }
1263          if (!ctx->VertexProgram._Enabled) {
1264             _mesa_error(ctx, GL_INVALID_OPERATION,
1265                         "glGetProgramRegisterfvMESA");
1266             return;
1267          }
1268          /* GL_NV_vertex_program */
1269          if (reg[0] == 'R') {
1270             /* Temp register */
1271             GLint i = _mesa_atoi(reg + 1);
1272             if (i >= (GLint)ctx->Const.MaxVertexProgramTemps) {
1273                _mesa_error(ctx, GL_INVALID_VALUE,
1274                            "glGetProgramRegisterfvMESA(registerName)");
1275                return;
1276             }
1277             COPY_4V(v, ctx->VertexProgram.Temporaries[i]);
1278          }
1279          else if (reg[0] == 'v' && reg[1] == '[') {
1280             /* Vertex Input attribute */
1281             GLuint i;
1282             for (i = 0; i < ctx->Const.MaxVertexProgramAttribs; i++) {
1283                const char *name = _mesa_nv_vertex_input_register_name(i);
1284                char number[10];
1285                sprintf(number, "%d", i);
1286                if (_mesa_strncmp(reg + 2, name, 4) == 0 ||
1287                    _mesa_strncmp(reg + 2, number, _mesa_strlen(number)) == 0) {
1288                   COPY_4V(v, ctx->VertexProgram.Inputs[i]);
1289                   return;
1290                }
1291             }
1292             _mesa_error(ctx, GL_INVALID_VALUE,
1293                         "glGetProgramRegisterfvMESA(registerName)");
1294             return;
1295          }
1296          else if (reg[0] == 'o' && reg[1] == '[') {
1297             /* Vertex output attribute */
1298          }
1299          /* GL_ARB_vertex_program */
1300          else if (_mesa_strncmp(reg, "vertex.", 7) == 0) {
1301
1302          }
1303          else {
1304             _mesa_error(ctx, GL_INVALID_VALUE,
1305                         "glGetProgramRegisterfvMESA(registerName)");
1306             return;
1307          }
1308          break;
1309       case GL_FRAGMENT_PROGRAM_ARB:
1310          if (!ctx->Extensions.ARB_fragment_program) {
1311             _mesa_error(ctx, GL_INVALID_ENUM,
1312                         "glGetProgramRegisterfvMESA(target)");
1313             return;
1314          }
1315          if (!ctx->FragmentProgram._Enabled) {
1316             _mesa_error(ctx, GL_INVALID_OPERATION,
1317                         "glGetProgramRegisterfvMESA");
1318             return;
1319          }
1320          /* XXX to do */
1321          break;
1322       case GL_FRAGMENT_PROGRAM_NV:
1323          if (!ctx->Extensions.NV_fragment_program) {
1324             _mesa_error(ctx, GL_INVALID_ENUM,
1325                         "glGetProgramRegisterfvMESA(target)");
1326             return;
1327          }
1328          if (!ctx->FragmentProgram._Enabled) {
1329             _mesa_error(ctx, GL_INVALID_OPERATION,
1330                         "glGetProgramRegisterfvMESA");
1331             return;
1332          }
1333          if (reg[0] == 'R') {
1334             /* Temp register */
1335             GLint i = _mesa_atoi(reg + 1);
1336             if (i >= (GLint)ctx->Const.MaxFragmentProgramTemps) {
1337                _mesa_error(ctx, GL_INVALID_VALUE,
1338                            "glGetProgramRegisterfvMESA(registerName)");
1339                return;
1340             }
1341             COPY_4V(v, ctx->FragmentProgram.Machine.Temporaries[i]);
1342          }
1343          else if (reg[0] == 'f' && reg[1] == '[') {
1344             /* Fragment input attribute */
1345             GLuint i;
1346             for (i = 0; i < ctx->Const.MaxFragmentProgramAttribs; i++) {
1347                const char *name = _mesa_nv_fragment_input_register_name(i);
1348                if (_mesa_strncmp(reg + 2, name, 4) == 0) {
1349                   COPY_4V(v, ctx->FragmentProgram.Machine.Inputs[i]);
1350                   return;
1351                }
1352             }
1353             _mesa_error(ctx, GL_INVALID_VALUE,
1354                         "glGetProgramRegisterfvMESA(registerName)");
1355             return;
1356          }
1357          else if (_mesa_strcmp(reg, "o[COLR]") == 0) {
1358             /* Fragment output color */
1359             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLR]);
1360          }
1361          else if (_mesa_strcmp(reg, "o[COLH]") == 0) {
1362             /* Fragment output color */
1363             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLH]);
1364          }
1365          else if (_mesa_strcmp(reg, "o[DEPR]") == 0) {
1366             /* Fragment output depth */
1367             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_DEPR]);
1368          }
1369          else {
1370             /* try user-defined identifiers */
1371             const GLfloat *value = _mesa_lookup_parameter_value(
1372                        ctx->FragmentProgram.Current->Parameters, -1, reg);
1373             if (value) {
1374                COPY_4V(v, value);
1375             }
1376             else {
1377                _mesa_error(ctx, GL_INVALID_VALUE,
1378                            "glGetProgramRegisterfvMESA(registerName)");
1379                return;
1380             }
1381          }
1382          break;
1383       default:
1384          _mesa_error(ctx, GL_INVALID_ENUM,
1385                      "glGetProgramRegisterfvMESA(target)");
1386          return;
1387    }
1388
1389 }