src/mesa/main/program.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  5.1
   4  *
   5  * Copyright (C) 1999-2003  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
  43
  44 /**********************************************************************/
  45 /* Utility functions                                                  */
  46 /**********************************************************************/
  47
  48
  49 /**
  50  * Init context's program state
  51  */
  52 void
  53 _mesa_init_program(GLcontext *ctx)
  54 {
  55    GLuint i;
  56
  57    ctx->Program.ErrorPos = -1;
  58    ctx->Program.ErrorString = _mesa_strdup("");
  59
  60 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
  61    ctx->VertexProgram.Enabled = GL_FALSE;
  62    ctx->VertexProgram.PointSizeEnabled = GL_FALSE;
  63    ctx->VertexProgram.TwoSideEnabled = GL_FALSE;
  64    ctx->VertexProgram.Current = NULL;
  65    ctx->VertexProgram.Current = (struct vertex_program *) ctx->Shared->DefaultVertexProgram;
  66    assert(ctx->VertexProgram.Current);
  67    ctx->VertexProgram.Current->Base.RefCount++;
  68    for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
  69       ctx->VertexProgram.TrackMatrix[i] = GL_NONE;
  70       ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV;
  71    }
  72 #endif
  73
  74 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
  75    ctx->FragmentProgram.Enabled = GL_FALSE;
  76    ctx->FragmentProgram.Current = (struct fragment_program *) ctx->Shared->DefaultFragmentProgram;
  77    assert(ctx->FragmentProgram.Current);
  78    ctx->FragmentProgram.Current->Base.RefCount++;
  79 #endif
  80 }
  81
  82
  83 /**
  84  * Set the vertex/fragment program error state (position and error string).
  85  * This is generally called from within the parsers.
  86  */
  87 void
  88 _mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string)
  89 {
  90    ctx->Program.ErrorPos = pos;
  91    _mesa_free((void *) ctx->Program.ErrorString);
  92    if (!string)
  93       string = "";
  94    ctx->Program.ErrorString = _mesa_strdup(string);
  95 }
  96
  97
  98 /**
  99  * Find the line number and column for 'pos' within 'string'.
 100  * Return a copy of the line which contains 'pos'.  Free the line with
 101  * _mesa_free().
 102  * \param string  the program string
 103  * \param pos     the position within the string
 104  * \param line    returns the line number corresponding to 'pos'.
 105  * \param col     returns the column number corresponding to 'pos'.
 106  * \return copy of the line containing 'pos'.
 107  */
 108 const GLubyte *
 109 _mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
 110                        GLint *line, GLint *col)
 111 {
 112    const GLubyte *lineStart = string;
 113    const GLubyte *p = string;
 114    GLubyte *s;
 115    int len;
 116
 117    *line = 1;
 118
 119    while (p != pos) {
 120       if (*p == (GLubyte) '\n') {
 121          (*line)++;
 122          lineStart = p + 1;
 123       }
 124       p++;
 125    }
 126
 127    *col = (pos - lineStart) + 1;
 128
 129    /* return copy of this line */
 130    while (*p != 0 && *p != '\n')
 131       p++;
 132    len = p - lineStart;
 133    s = (GLubyte *) _mesa_malloc(len + 1);
 134    _mesa_memcpy(s, lineStart, len);
 135    s[len] = 0;
 136
 137    return s;
 138 }
 139
 140
 141
 142 /**
 143  * Allocate and initialize a new fragment/vertex program object
 144  * \param ctx  context
 145  * \param id   program id/number
 146  * \param target  program target/type
 147  * \return  pointer to new program object
 148  */
 149 struct program *
 150 _mesa_alloc_program(GLcontext *ctx, GLenum target, GLuint id)
 151 {
 152    struct program *prog;
 153
 154    if (target == GL_VERTEX_PROGRAM_NV
 155        || target == GL_VERTEX_PROGRAM_ARB) {
 156       struct vertex_program *vprog = CALLOC_STRUCT(vertex_program);
 157       if (!vprog) {
 158          return NULL;
 159       }
 160       prog = &(vprog->Base);
 161    }
 162    else if (target == GL_FRAGMENT_PROGRAM_NV
 163             || target == GL_FRAGMENT_PROGRAM_ARB) {
 164       struct fragment_program *fprog = CALLOC_STRUCT(fragment_program);
 165       if (!fprog) {
 166          return NULL;
 167       }
 168       prog = &(fprog->Base);
 169    }
 170    else {
 171       _mesa_problem(ctx, "bad target in _mesa_alloc_program");
 172       return NULL;
 173    }
 174    prog->Id = id;
 175    prog->Target = target;
 176    prog->Resident = GL_TRUE;
 177    prog->RefCount = 1;
 178    return prog;
 179 }
 180
 181
 182 /**
 183  * Delete a program and remove it from the hash table, ignoring the
 184  * reference count.
 185  * \note Called from the GL API dispatcher.
 186  */
 187 void
 188 _mesa_delete_program(GLcontext *ctx, struct program *prog)
 189 {
 190    ASSERT(prog);
 191
 192    if (prog->String)
 193       _mesa_free(prog->String);
 194    if (prog->Target == GL_VERTEX_PROGRAM_NV ||
 195        prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
 196       struct vertex_program *vprog = (struct vertex_program *) prog;
 197       if (vprog->Instructions)
 198          _mesa_free(vprog->Instructions);
 199    }
 200    else if (prog->Target == GL_FRAGMENT_PROGRAM_NV) {
 201       struct fragment_program *fprog = (struct fragment_program *) prog;
 202       if (fprog->Instructions)
 203          _mesa_free(fprog->Instructions);
 204       if (fprog->Parameters) {
 205          _mesa_free_parameter_list(fprog->Parameters);
 206       }
 207    }
 208    _mesa_free(prog);
 209 }
 210
 211
 212
 213 /**********************************************************************/
 214 /* Program parameter functions                                        */
 215 /**********************************************************************/
 216
 217 struct program_parameter_list *
 218 _mesa_new_parameter_list(void)
 219 {
 220    return (struct program_parameter_list *)
 221       _mesa_calloc(sizeof(struct program_parameter_list));
 222 }
 223
 224
 225 /**
 226  * Free a parameter list and all its parameters
 227  */
 228 void
 229 _mesa_free_parameter_list(struct program_parameter_list *paramList)
 230 {
 231    _mesa_free_parameters(paramList);
 232    _mesa_free(paramList);
 233 }
 234
 235
 236 /**
 237  * Free all the parameters in the given list, but don't free the
 238  * paramList structure itself.
 239  */
 240 void
 241 _mesa_free_parameters(struct program_parameter_list *paramList)
 242 {
 243    GLuint i;
 244    for (i = 0; i < paramList->NumParameters; i++) {
 245       _mesa_free((void *) paramList->Parameters[i].Name);
 246    }
 247    _mesa_free(paramList->Parameters);
 248    paramList->NumParameters = 0;
 249    paramList->Parameters = NULL;
 250 }
 251
 252
 253 /**
 254  * Helper function used by the functions below.
 255  */
 256 static GLint
 257 add_parameter(struct program_parameter_list *paramList,
 258               const char *name, const GLfloat values[4],
 259               enum parameter_type type)
 260 {
 261    const GLuint n = paramList->NumParameters;
 262
 263    paramList->Parameters = _mesa_realloc(paramList->Parameters,
 264                                    n * sizeof(struct program_parameter),
 265                                    (n + 1) * sizeof(struct program_parameter));
 266    if (!paramList->Parameters) {
 267       /* out of memory */
 268       paramList->NumParameters = 0;
 269       return -1;
 270    }
 271    else {
 272       paramList->NumParameters = n + 1;
 273       paramList->Parameters[n].Name = _mesa_strdup(name);
 274       paramList->Parameters[n].Type = type;
 275       if (values)
 276          COPY_4V(paramList->Parameters[n].Values, values);
 277       return (GLint) n;
 278    }
 279 }
 280
 281
 282 /**
 283  * Add a new named program parameter (Ex: NV_fragment_program DEFINE statement)
 284  * \return index of the new entry in the parameter list
 285  */
 286 GLint
 287 _mesa_add_named_parameter(struct program_parameter_list *paramList,
 288                           const char *name, const GLfloat values[4])
 289 {
 290    return add_parameter(paramList, name, values, NAMED_PARAMETER);
 291 }
 292
 293
 294 /**
 295  * Add a new unnamed constant to the parameter list.
 296  * \param paramList - the parameter list
 297  * \param values - four float values
 298  * \return index of the new parameter.
 299  */
 300 GLint
 301 _mesa_add_named_constant(struct program_parameter_list *paramList,
 302                          const char *name, const GLfloat values[4])
 303 {
 304    return add_parameter(paramList, name, values, CONSTANT);
 305 }
 306
 307
 308 /**
 309  * Add a new unnamed constant to the parameter list.
 310  * \param paramList - the parameter list
 311  * \param values - four float values
 312  * \return index of the new parameter.
 313  */
 314 GLint
 315 _mesa_add_unnamed_constant(struct program_parameter_list *paramList,
 316                            const GLfloat values[4])
 317 {
 318    /* generate a new dummy name */
 319    static GLuint n = 0;
 320    char name[20];
 321    _mesa_sprintf(name, "constant%d", n);
 322    n++;
 323    /* store it */
 324    return add_parameter(paramList, name, values, CONSTANT);
 325 }
 326
 327
 328 /**
 329  * Add a new state reference to the parameter list.
 330  * \param paramList - the parameter list
 331  * \param values - four float values
 332  * \return index of the new parameter.
 333  */
 334 GLint
 335 _mesa_add_state_reference(struct program_parameter_list *paramList,
 336                           const char *stateString)
 337 {
 338    /* XXX Should we parse <stateString> here and produce the parameter's
 339     * list of STATE_* tokens here, or in the parser?
 340     */
 341    return add_parameter(paramList, stateString, NULL, STATE);
 342 }
 343
 344
 345 /**
 346  * Lookup a parameter value by name in the given parameter list.
 347  * \return pointer to the float[4] values.
 348  */
 349 GLfloat *
 350 _mesa_lookup_parameter_value(struct program_parameter_list *paramList,
 351                              GLsizei nameLen, const char *name)
 352 {
 353    GLuint i;
 354
 355    if (nameLen == -1) {
 356       /* name is null-terminated */
 357       for (i = 0; i < paramList->NumParameters; i++) {
 358          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 359             return paramList->Parameters[i].Values;
 360       }
 361    }
 362    else {
 363       /* name is not null-terminated, use nameLen */
 364       for (i = 0; i < paramList->NumParameters; i++) {
 365          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 366              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 367             return paramList->Parameters[i].Values;
 368       }
 369    }
 370    return NULL;
 371 }
 372
 373
 374 /**
 375  * Lookup a parameter index by name in the given parameter list.
 376  * \return index of parameter in the list.
 377  */
 378 GLint
 379 _mesa_lookup_parameter_index(struct program_parameter_list *paramList,
 380                              GLsizei nameLen, const char *name)
 381 {
 382    GLint i;
 383
 384    if (nameLen == -1) {
 385       /* name is null-terminated */
 386       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 387          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 388             return i;
 389       }
 390    }
 391    else {
 392       /* name is not null-terminated, use nameLen */
 393       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 394          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 395              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 396             return i;
 397       }
 398    }
 399    return -1;
 400 }
 401
 402
 403 /**
 404  * Use the list of tokens in the state[] array to find global GL state
 405  * and return it in <value>.  Usually, four values are returned in <value>
 406  * but matrix queries may return as many as 16 values.
 407  * This function is used for ARB vertex/fragment programs.
 408  * The program parser will produce the state[] values.
 409  */
 410 static void
 411 _mesa_fetch_state(GLcontext *ctx, const enum state_index state[],
 412                   GLfloat *value)
 413 {
 414    switch (state[0]) {
 415    case STATE_MATERIAL:
 416       {
 417          /* state[1] is either 0=front or 1=back side */
 418          const GLuint face = (GLuint) state[1];
 419          /* state[2] is the material attribute */
 420          switch (state[2]) {
 421          case STATE_AMBIENT:
 422             if (face == 0)
 423                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT]);
 424             else
 425                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT]);
 426             return;
 427          case STATE_DIFFUSE:
 428             if (face == 0)
 429                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE]);
 430             else
 431                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE]);
 432             return;
 433          case STATE_SPECULAR:
 434             if (face == 0)
 435                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR]);
 436             else
 437                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SPECULAR]);
 438             return;
 439          case STATE_EMISSION:
 440             if (face == 0)
 441                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION]);
 442             else
 443                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION]);
 444             return;
 445          case STATE_SHININESS:
 446             if (face == 0)
 447                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS][0];
 448             else
 449                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SHININESS][0];
 450             value[1] = 0.0F;
 451             value[2] = 0.0F;
 452             value[3] = 1.0F;
 453             return;
 454          default:
 455             _mesa_problem(ctx, "Invalid material state in fetch_state");
 456             return;
 457          }
 458       };
 459       return;
 460    case STATE_LIGHT:
 461       {
 462          /* state[1] is the light number */
 463          const GLuint ln = (GLuint) state[1];
 464          /* state[2] is the light attribute */
 465          switch (state[2]) {
 466          case STATE_AMBIENT:
 467             COPY_4V(value, ctx->Light.Light[ln].Ambient);
 468             return;
 469          case STATE_DIFFUSE:
 470             COPY_4V(value, ctx->Light.Light[ln].Diffuse);
 471             return;
 472          case STATE_SPECULAR:
 473             COPY_4V(value, ctx->Light.Light[ln].Specular);
 474             return;
 475          case STATE_POSITION:
 476             COPY_4V(value, ctx->Light.Light[ln].EyePosition);
 477             return;
 478          case STATE_ATTENUATION:
 479             value[0] = ctx->Light.Light[ln].ConstantAttenuation;
 480             value[1] = ctx->Light.Light[ln].LinearAttenuation;
 481             value[2] = ctx->Light.Light[ln].QuadraticAttenuation;
 482             value[3] = ctx->Light.Light[ln].SpotExponent;
 483             return;
 484          case STATE_SPOT_DIRECTION:
 485             COPY_4V(value, ctx->Light.Light[ln].EyeDirection);
 486             return;
 487          default:
 488             _mesa_problem(ctx, "Invalid light state in fetch_state");
 489             return;
 490          }
 491       }
 492       return;
 493    case STATE_LIGHTMODEL_AMBIENT:
 494       COPY_4V(value, ctx->Light.Model.Ambient);
 495       return;
 496    case STATE_LIGHTMODEL_SCENECOLOR:
 497       if (state[1] == 0) {
 498          /* front */
 499          GLint i;
 500          for (i = 0; i < 4; i++) {
 501             value[i] = ctx->Light.Model.Ambient[i]
 502                * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]
 503                + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];
 504          }
 505       }
 506       else {
 507          /* back */
 508          GLint i;
 509          for (i = 0; i < 4; i++) {
 510             value[i] = ctx->Light.Model.Ambient[i]
 511                * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]
 512                + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];
 513          }
 514       }
 515       return;
 516    case STATE_LIGHTPROD:
 517       {
 518          const GLuint ln = (GLuint) state[1];
 519          const GLuint face = (GLuint) state[2];
 520          GLint i;
 521          ASSERT(face == 0 || face == 1);
 522          switch (state[3]) {
 523             case STATE_AMBIENT:
 524                for (i = 0; i < 3; i++) {
 525                   value[i] = ctx->Light.Light[ln].Ambient[i] *
 526                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];
 527                }
 528                /* [3] = material alpha */
 529                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 530                return;
 531             case STATE_DIFFUSE:
 532                for (i = 0; i < 3; i++) {
 533                   value[i] = ctx->Light.Light[ln].Diffuse[i] *
 534                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];
 535                }
 536                /* [3] = material alpha */
 537                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 538                return;
 539             case STATE_SPECULAR:
 540                for (i = 0; i < 3; i++) {
 541                   value[i] = ctx->Light.Light[ln].Specular[i] *
 542                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];
 543                }
 544                /* [3] = material alpha */
 545                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 546                return;
 547             default:
 548                _mesa_problem(ctx, "Invalid lightprod state in fetch_state");
 549                return;
 550          }
 551       }
 552       return;
 553    case STATE_TEXGEN:
 554       {
 555          /* state[1] is the texture unit */
 556          const GLuint unit = (GLuint) state[1];
 557          /* state[2] is the texgen attribute */
 558          switch (state[2]) {
 559          case STATE_TEXGEN_EYE_S:
 560             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneS);
 561             return;
 562          case STATE_TEXGEN_EYE_T:
 563             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneT);
 564             return;
 565          case STATE_TEXGEN_EYE_R:
 566             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneR);
 567             return;
 568          case STATE_TEXGEN_EYE_Q:
 569             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneQ);
 570             return;
 571          case STATE_TEXGEN_OBJECT_S:
 572             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneS);
 573             return;
 574          case STATE_TEXGEN_OBJECT_T:
 575             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneT);
 576             return;
 577          case STATE_TEXGEN_OBJECT_R:
 578             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneR);
 579             return;
 580          case STATE_TEXGEN_OBJECT_Q:
 581             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneQ);
 582             return;
 583          default:
 584             _mesa_problem(ctx, "Invalid texgen state in fetch_state");
 585             return;
 586          }
 587       }
 588       return;
 589    case STATE_FOG_COLOR:
 590       COPY_4V(value, ctx->Fog.Color);
 591       return;
 592    case STATE_FOG_PARAMS:
 593       value[0] = ctx->Fog.Density;
 594       value[1] = ctx->Fog.Start;
 595       value[2] = ctx->Fog.End;
 596       value[3] = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
 597       return;
 598    case STATE_CLIPPLANE:
 599       {
 600          const GLuint plane = (GLuint) state[1];
 601          COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);
 602       }
 603       return;
 604    case STATE_POINT_SIZE:
 605       value[0] = ctx->Point.Size;
 606       value[1] = ctx->Point.MinSize;
 607       value[2] = ctx->Point.MaxSize;
 608       value[3] = ctx->Point.Threshold;
 609       return;
 610    case STATE_POINT_ATTENUATION:
 611       value[0] = ctx->Point.Params[0];
 612       value[1] = ctx->Point.Params[1];
 613       value[2] = ctx->Point.Params[2];
 614       value[3] = 1.0F;
 615       return;
 616    case STATE_MATRIX:
 617       {
 618          /* state[1] = modelview, projection, texture, etc. */
 619          /* state[2] = which texture matrix or program matrix */
 620          /* state[3] = first column to fetch */
 621          /* state[4] = last column to fetch */
 622          /* state[5] = transpose, inverse or invtrans */
 623
 624          const GLmatrix *matrix;
 625          const enum state_index mat = state[1];
 626          const GLuint index = (GLuint) state[2];
 627          const GLuint first = (GLuint) state[3];
 628          const GLuint last = (GLuint) state[4];
 629          const enum state_index modifier = state[5];
 630          const GLfloat *m;
 631          GLuint row, i;
 632          if (mat == STATE_MODELVIEW) {
 633             matrix = ctx->ModelviewMatrixStack.Top;
 634          }
 635          else if (mat == STATE_PROJECTION) {
 636             matrix = ctx->ProjectionMatrixStack.Top;
 637          }
 638          else if (mat == STATE_MVP) {
 639             matrix = &ctx->_ModelProjectMatrix;
 640          }
 641          else if (mat == STATE_TEXTURE) {
 642             matrix = ctx->TextureMatrixStack[index].Top;
 643          }
 644          else if (mat == STATE_PROGRAM) {
 645             matrix = ctx->ProgramMatrixStack[index].Top;
 646          }
 647          else {
 648             _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");
 649             return;
 650          }
 651          if (modifier == STATE_MATRIX_INVERSE ||
 652              modifier == STATE_MATRIX_INVTRANS) {
 653             /* XXX be sure inverse is up to date */
 654             m = matrix->inv;
 655          }
 656          else {
 657             m = matrix->m;
 658          }
 659          if (modifier == STATE_MATRIX_TRANSPOSE ||
 660              modifier == STATE_MATRIX_INVTRANS) {
 661             for (i = 0, row = first; row <= last; row++) {
 662                value[i++] = m[row * 4 + 0];
 663                value[i++] = m[row * 4 + 1];
 664                value[i++] = m[row * 4 + 2];
 665                value[i++] = m[row * 4 + 3];
 666             }
 667          }
 668          else {
 669             for (i = 0, row = first; row <= last; row++) {
 670                value[i++] = m[row + 0];
 671                value[i++] = m[row + 4];
 672                value[i++] = m[row + 8];
 673                value[i++] = m[row + 12];
 674             }
 675          }
 676       }
 677       return;
 678    default:
 679       _mesa_problem(ctx, "Invalid state in fetch_state");
 680       return;
 681    }
 682 }
 683
 684
 685 /**
 686  * Loop over all the parameters in a parameter list.  If the parameter
 687  * is a GL state reference, look up the current value of that state
 688  * variable and put it into the parameter's Value[4] array.
 689  * This would be called at glBegin time when using a fragment program.
 690  */
 691 void
 692 _mesa_load_state_parameters(GLcontext *ctx,
 693                             struct program_parameter_list *paramList)
 694 {
 695    GLuint i;
 696    for (i = 0; i < paramList->NumParameters; i++) {
 697       if (paramList->Parameters[i].Type == STATE) {
 698          _mesa_fetch_state(ctx, paramList->Parameters[i].StateIndexes,
 699                            paramList->Parameters[i].Values);
 700       }
 701    }
 702 }
 703
 704
 705
 706 /**********************************************************************/
 707 /* API functions                                                      */
 708 /**********************************************************************/
 709
 710
 711 /**
 712  * Bind a program (make it current)
 713  * \note Called from the GL API dispatcher by both glBindProgramNV
 714  * and glBindProgramARB.
 715  */
 716 void
 717 _mesa_BindProgram(GLenum target, GLuint id)
 718 {
 719    struct program *prog;
 720    GET_CURRENT_CONTEXT(ctx);
 721    ASSERT_OUTSIDE_BEGIN_END(ctx);
 722
 723    if ((target == GL_VERTEX_PROGRAM_NV
 724         && ctx->Extensions.NV_vertex_program) ||
 725        (target == GL_VERTEX_PROGRAM_ARB
 726         && ctx->Extensions.ARB_vertex_program)) {
 727       if (ctx->VertexProgram.Current &&
 728           ctx->VertexProgram.Current->Base.Id == id)
 729          return;
 730       /* decrement refcount on previously bound vertex program */
 731       if (ctx->VertexProgram.Current) {
 732          ctx->VertexProgram.Current->Base.RefCount--;
 733          /* and delete if refcount goes below one */
 734          if (ctx->VertexProgram.Current->Base.RefCount <= 0) {
 735             _mesa_delete_program(ctx, &(ctx->VertexProgram.Current->Base));
 736             _mesa_HashRemove(ctx->Shared->Programs, id);
 737          }
 738       }
 739    }
 740    else if ((target == GL_FRAGMENT_PROGRAM_NV
 741              && ctx->Extensions.NV_fragment_program) ||
 742             (target == GL_FRAGMENT_PROGRAM_ARB
 743              && ctx->Extensions.ARB_fragment_program)) {
 744       if (ctx->FragmentProgram.Current &&
 745           ctx->FragmentProgram.Current->Base.Id == id)
 746          return;
 747       /* decrement refcount on previously bound fragment program */
 748       if (ctx->FragmentProgram.Current) {
 749          ctx->FragmentProgram.Current->Base.RefCount--;
 750          /* and delete if refcount goes below one */
 751          if (ctx->FragmentProgram.Current->Base.RefCount <= 0) {
 752             _mesa_delete_program(ctx, &(ctx->FragmentProgram.Current->Base));
 753             _mesa_HashRemove(ctx->Shared->Programs, id);
 754          }
 755       }
 756    }
 757    else {
 758       _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramNV/ARB(target)");
 759       return;
 760    }
 761
 762    /* NOTE: binding to a non-existant program is not an error.
 763     * That's supposed to be caught in glBegin.
 764     */
 765    if (id == 0) {
 766       /* default program */
 767       prog = NULL;
 768       if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB)
 769          prog = ctx->Shared->DefaultVertexProgram;
 770       else
 771          prog = ctx->Shared->DefaultFragmentProgram;
 772    }
 773    else {
 774       prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, id);
 775       if (prog) {
 776          if (prog->Target == 0) {
 777             /* prog was allocated with glGenProgramsNV */
 778             prog->Target = target;
 779          }
 780          else if (prog->Target != target) {
 781             _mesa_error(ctx, GL_INVALID_OPERATION,
 782                         "glBindProgramNV/ARB(target mismatch)");
 783             return;
 784          }
 785       }
 786       else {
 787          /* allocate a new program now */
 788          prog = _mesa_alloc_program(ctx, target, id);
 789          if (!prog) {
 790             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramNV/ARB");
 791             return;
 792          }
 793          prog->Id = id;
 794          prog->Target = target;
 795          prog->Resident = GL_TRUE;
 796          prog->RefCount = 1;
 797          _mesa_HashInsert(ctx->Shared->Programs, id, prog);
 798       }
 799    }
 800
 801    /* bind now */
 802    if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB) {
 803       ctx->VertexProgram.Current = (struct vertex_program *) prog;
 804    }
 805    else if (target == GL_FRAGMENT_PROGRAM_NV || target == GL_FRAGMENT_PROGRAM_ARB) {
 806       ctx->FragmentProgram.Current = (struct fragment_program *) prog;
 807    }
 808
 809    if (prog)
 810       prog->RefCount++;
 811 }
 812
 813
 814 /**
 815  * Delete a list of programs.
 816  * \note Not compiled into display lists.
 817  * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
 818  */
 819 void
 820 _mesa_DeletePrograms(GLsizei n, const GLuint *ids)
 821 {
 822    GLint i;
 823    GET_CURRENT_CONTEXT(ctx);
 824    ASSERT_OUTSIDE_BEGIN_END(ctx);
 825
 826    if (n < 0) {
 827       _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
 828       return;
 829    }
 830
 831    for (i = 0; i < n; i++) {
 832       if (ids[i] != 0) {
 833          struct program *prog = (struct program *)
 834             _mesa_HashLookup(ctx->Shared->Programs, ids[i]);
 835          if (prog) {
 836             if (prog->Target == GL_VERTEX_PROGRAM_NV ||
 837                 prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
 838                if (ctx->VertexProgram.Current &&
 839                    ctx->VertexProgram.Current->Base.Id == ids[i]) {
 840                   /* unbind this currently bound program */
 841                   _mesa_BindProgram(prog->Target, 0);
 842                }
 843             }
 844             else if (prog->Target == GL_FRAGMENT_PROGRAM_NV) {
 845                if (ctx->FragmentProgram.Current &&
 846                    ctx->FragmentProgram.Current->Base.Id == ids[i]) {
 847                   /* unbind this currently bound program */
 848                   _mesa_BindProgram(prog->Target, 0);
 849                }
 850             }
 851             else {
 852                _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
 853                return;
 854             }
 855             prog->RefCount--;
 856             if (prog->RefCount <= 0) {
 857                _mesa_delete_program(ctx, prog);
 858             }
 859          }
 860       }
 861    }
 862 }
 863
 864
 865 /**
 866  * Generate a list of new program identifiers.
 867  * \note Not compiled into display lists.
 868  * \note Called by both glGenProgramsNV and glGenProgramsARB.
 869  */
 870 void
 871 _mesa_GenPrograms(GLsizei n, GLuint *ids)
 872 {
 873    GLuint first;
 874    GLuint i;
 875    GET_CURRENT_CONTEXT(ctx);
 876    ASSERT_OUTSIDE_BEGIN_END(ctx);
 877
 878    if (n < 0) {
 879       _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
 880       return;
 881    }
 882
 883    if (!ids)
 884       return;
 885
 886    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
 887
 888    for (i = 0; i < (GLuint) n; i++) {
 889       const int bytes = MAX2(sizeof(struct vertex_program),
 890                              sizeof(struct fragment_program));
 891       struct program *prog = (struct program *) _mesa_calloc(bytes);
 892       if (!prog) {
 893          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenPrograms");
 894          return;
 895       }
 896       prog->RefCount = 1;
 897       prog->Id = first + i;
 898       _mesa_HashInsert(ctx->Shared->Programs, first + i, prog);
 899    }
 900
 901    /* Return the program names */
 902    for (i = 0; i < (GLuint) n; i++) {
 903       ids[i] = first + i;
 904    }
 905 }
 906
 907
 908 /**
 909  * Determine if id names a program.
 910  * \note Not compiled into display lists.
 911  * \note Called from both glIsProgramNV and glIsProgramARB.
 912  * \param id is the program identifier
 913  * \return GL_TRUE if id is a program, else GL_FALSE.
 914  */
 915 GLboolean
 916 _mesa_IsProgram(GLuint id)
 917 {
 918    struct program *prog;
 919    GET_CURRENT_CONTEXT(ctx);
 920    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 921
 922    if (id == 0)
 923       return GL_FALSE;
 924
 925    prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, id);
 926    if (prog && prog->Target)
 927       return GL_TRUE;
 928    else
 929       return GL_FALSE;
 930 }
 931
 932
 933
 934 /**********************************************************************/
 935 /* GL_MESA_program_debug extension                                    */
 936 /**********************************************************************/
 937
 938
 939 /* XXX temporary */
 940 void
 941 glProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
 942                       GLvoid *data)
 943 {
 944    _mesa_ProgramCallbackMESA(target, callback, data);
 945 }
 946
 947
 948 void
 949 _mesa_ProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
 950                           GLvoid *data)
 951 {
 952    GET_CURRENT_CONTEXT(ctx);
 953
 954    switch (target) {
 955       case GL_FRAGMENT_PROGRAM_ARB:
 956          if (!ctx->Extensions.ARB_fragment_program) {
 957             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
 958             return;
 959          }
 960          ctx->FragmentProgram.Callback = callback;
 961          ctx->FragmentProgram.CallbackData = data;
 962          break;
 963       case GL_FRAGMENT_PROGRAM_NV:
 964          if (!ctx->Extensions.NV_fragment_program) {
 965             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
 966             return;
 967          }
 968          ctx->FragmentProgram.Callback = callback;
 969          ctx->FragmentProgram.CallbackData = data;
 970          break;
 971       case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
 972          if (!ctx->Extensions.ARB_vertex_program &&
 973              !ctx->Extensions.NV_vertex_program) {
 974             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
 975             return;
 976          }
 977          ctx->VertexProgram.Callback = callback;
 978          ctx->VertexProgram.CallbackData = data;
 979          break;
 980       default:
 981          _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
 982          return;
 983    }
 984 }
 985
 986
 987 /* XXX temporary */
 988 void
 989 glGetProgramRegisterfvMESA(GLenum target,
 990                            GLsizei len, const GLubyte *registerName,
 991                            GLfloat *v)
 992 {
 993    _mesa_GetProgramRegisterfvMESA(target, len, registerName, v);
 994 }
 995
 996
 997 void
 998 _mesa_GetProgramRegisterfvMESA(GLenum target,
 999                                GLsizei len, const GLubyte *registerName,
1000                                GLfloat *v)
1001 {
1002    char reg[1000];
1003    GET_CURRENT_CONTEXT(ctx);
1004
1005    /* We _should_ be inside glBegin/glEnd */
1006 #if 0
1007    if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
1008       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA");
1009       return;
1010    }
1011 #endif
1012
1013    /* make null-terminated copy of registerName */
1014    len = MIN2(len, sizeof(reg) - 1);
1015    _mesa_memcpy(reg, registerName, len);
1016    reg[len] = 0;
1017
1018    switch (target) {
1019       case GL_VERTEX_PROGRAM_NV:
1020          if (!ctx->Extensions.ARB_vertex_program &&
1021              !ctx->Extensions.NV_vertex_program) {
1022             _mesa_error(ctx, GL_INVALID_ENUM,
1023                         "glGetProgramRegisterfvMESA(target)");
1024             return;
1025          }
1026          if (!ctx->VertexProgram.Enabled) {
1027             _mesa_error(ctx, GL_INVALID_OPERATION,
1028                         "glGetProgramRegisterfvMESA");
1029             return;
1030          }
1031          /* GL_NV_vertex_program */
1032          if (reg[0] == 'R') {
1033             /* Temp register */
1034             GLint i = _mesa_atoi(reg + 1);
1035             if (i >= (GLint)ctx->Const.MaxVertexProgramTemps) {
1036                _mesa_error(ctx, GL_INVALID_VALUE,
1037                            "glGetProgramRegisterfvMESA(registerName)");
1038                return;
1039             }
1040             COPY_4V(v, ctx->VertexProgram.Temporaries[i]);
1041          }
1042          else if (reg[0] == 'v' && reg[1] == '[') {
1043             /* Vertex Input attribute */
1044             GLuint i;
1045             for (i = 0; i < ctx->Const.MaxVertexProgramAttribs; i++) {
1046                const char *name = _mesa_nv_vertex_input_register_name(i);
1047                char number[10];
1048                sprintf(number, "%d", i);
1049                if (_mesa_strncmp(reg + 2, name, 4) == 0 ||
1050                    _mesa_strncmp(reg + 2, number, _mesa_strlen(number)) == 0) {
1051                   COPY_4V(v, ctx->VertexProgram.Inputs[i]);
1052                   return;
1053                }
1054             }
1055             _mesa_error(ctx, GL_INVALID_VALUE,
1056                         "glGetProgramRegisterfvMESA(registerName)");
1057             return;
1058          }
1059          else if (reg[0] == 'o' && reg[1] == '[') {
1060             /* Vertex output attribute */
1061          }
1062          /* GL_ARB_vertex_program */
1063          else if (_mesa_strncmp(reg, "vertex.", 7) == 0) {
1064
1065          }
1066          else {
1067             _mesa_error(ctx, GL_INVALID_VALUE,
1068                         "glGetProgramRegisterfvMESA(registerName)");
1069             return;
1070          }
1071          break;
1072       case GL_FRAGMENT_PROGRAM_ARB:
1073          if (!ctx->Extensions.ARB_fragment_program) {
1074             _mesa_error(ctx, GL_INVALID_ENUM,
1075                         "glGetProgramRegisterfvMESA(target)");
1076             return;
1077          }
1078          if (!ctx->FragmentProgram.Enabled) {
1079             _mesa_error(ctx, GL_INVALID_OPERATION,
1080                         "glGetProgramRegisterfvMESA");
1081             return;
1082          }
1083          /* XXX to do */
1084          break;
1085       case GL_FRAGMENT_PROGRAM_NV:
1086          if (!ctx->Extensions.NV_fragment_program) {
1087             _mesa_error(ctx, GL_INVALID_ENUM,
1088                         "glGetProgramRegisterfvMESA(target)");
1089             return;
1090          }
1091          if (!ctx->FragmentProgram.Enabled) {
1092             _mesa_error(ctx, GL_INVALID_OPERATION,
1093                         "glGetProgramRegisterfvMESA");
1094             return;
1095          }
1096          if (reg[0] == 'R') {
1097             /* Temp register */
1098             GLint i = _mesa_atoi(reg + 1);
1099             if (i >= (GLint)ctx->Const.MaxFragmentProgramTemps) {
1100                _mesa_error(ctx, GL_INVALID_VALUE,
1101                            "glGetProgramRegisterfvMESA(registerName)");
1102                return;
1103             }
1104             COPY_4V(v, ctx->FragmentProgram.Machine.Temporaries[i]);
1105          }
1106          else if (reg[0] == 'f' && reg[1] == '[') {
1107             /* Fragment input attribute */
1108             GLuint i;
1109             for (i = 0; i < ctx->Const.MaxFragmentProgramAttribs; i++) {
1110                const char *name = _mesa_nv_fragment_input_register_name(i);
1111                if (_mesa_strncmp(reg + 2, name, 4) == 0) {
1112                   COPY_4V(v, ctx->FragmentProgram.Machine.Inputs[i]);
1113                   return;
1114                }
1115             }
1116             _mesa_error(ctx, GL_INVALID_VALUE,
1117                         "glGetProgramRegisterfvMESA(registerName)");
1118             return;
1119          }
1120          else if (_mesa_strcmp(reg, "o[COLR]") == 0) {
1121             /* Fragment output color */
1122             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLR]);
1123          }
1124          else if (_mesa_strcmp(reg, "o[COLH]") == 0) {
1125             /* Fragment output color */
1126             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLH]);
1127          }
1128          else if (_mesa_strcmp(reg, "o[DEPR]") == 0) {
1129             /* Fragment output depth */
1130             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_DEPR]);
1131          }
1132          else {
1133             /* try user-defined identifiers */
1134             const GLfloat *value = _mesa_lookup_parameter_value(
1135                        ctx->FragmentProgram.Current->Parameters, -1, reg);
1136             if (value) {
1137                COPY_4V(v, value);
1138             }
1139             else {
1140                _mesa_error(ctx, GL_INVALID_VALUE,
1141                            "glGetProgramRegisterfvMESA(registerName)");
1142                return;
1143             }
1144          }
1145          break;
1146       default:
1147          _mesa_error(ctx, GL_INVALID_ENUM,
1148                      "glGetProgramRegisterfvMESA(target)");
1149          return;
1150    }
1151
1152 }