src/mesa/main/program.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.0
   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
  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 static struct program * _mesa_init_program_struct( GLcontext *ctx,
 142                                                    struct program *prog,
 143                                                    GLenum target, GLuint id)
 144 {
 145    if (prog) {
 146       prog->Id = id;
 147       prog->Target = target;
 148       prog->Resident = GL_TRUE;
 149       prog->RefCount = 1;
 150    }
 151
 152    fprintf(stderr, "%s %x %x\n", __FUNCTION__, target, prog);
 153    return prog;
 154 }
 155
 156 struct program * _mesa_init_fragment_program( GLcontext *ctx,
 157                                               struct fragment_program *prog,
 158                                               GLenum target, GLuint id)
 159 {
 160    if (prog)
 161       return _mesa_init_program_struct( ctx, &prog->Base, target, id );
 162    else
 163       return NULL;
 164 }
 165
 166 struct program * _mesa_init_vertex_program( GLcontext *ctx,
 167                                             struct vertex_program *prog,
 168                                             GLenum target, GLuint id)
 169 {
 170    if (prog)
 171       return _mesa_init_program_struct( ctx, &prog->Base, target, id );
 172    else
 173       return NULL;
 174 }
 175
 176
 177 /**
 178  * Allocate and initialize a new fragment/vertex program object but
 179  * don't put it into the program hash table.  Called via
 180  * ctx->Driver.NewProgram.  May be overridden (ie. replaced) by a
 181  * device driver function to implement OO deriviation with additional
 182  * types not understood by this function.
 183  *
 184  * \param ctx  context
 185  * \param id   program id/number
 186  * \param target  program target/type
 187  * \return  pointer to new program object
 188  */
 189 struct program *
 190 _mesa_new_program(GLcontext *ctx, GLenum target, GLuint id)
 191 {
 192    fprintf(stderr, "%s\n", __FUNCTION__);
 193    switch (target) {
 194    case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
 195       return _mesa_init_vertex_program( ctx, CALLOC_STRUCT(vertex_program),
 196                                         target, id );
 197
 198    case GL_FRAGMENT_PROGRAM_NV:
 199    case GL_FRAGMENT_PROGRAM_ARB:
 200       return _mesa_init_fragment_program( ctx, CALLOC_STRUCT(fragment_program),
 201                                           target, id );
 202
 203    default:
 204       _mesa_problem(ctx, "bad target in _mesa_new_program");
 205       return NULL;
 206    }
 207 }
 208
 209
 210 /**
 211  * Delete a program and remove it from the hash table, ignoring the
 212  * reference count.
 213  * Called via ctx->Driver.DeleteProgram.  May be wrapped (OO deriviation)
 214  * by a device driver function.
 215  */
 216 void
 217 _mesa_delete_program(GLcontext *ctx, struct program *prog)
 218 {
 219    ASSERT(prog);
 220
 221    if (prog->String)
 222       _mesa_free(prog->String);
 223    if (prog->Target == GL_VERTEX_PROGRAM_NV ||
 224        prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
 225       struct vertex_program *vprog = (struct vertex_program *) prog;
 226       if (vprog->Instructions)
 227          _mesa_free(vprog->Instructions);
 228    }
 229    else if (prog->Target == GL_FRAGMENT_PROGRAM_NV ||
 230             prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
 231       struct fragment_program *fprog = (struct fragment_program *) prog;
 232       if (fprog->Instructions)
 233          _mesa_free(fprog->Instructions);
 234       if (fprog->Parameters) {
 235          _mesa_free_parameter_list(fprog->Parameters);
 236       }
 237    }
 238    _mesa_free(prog);
 239 }
 240
 241
 242
 243 /**********************************************************************/
 244 /* Program parameter functions                                        */
 245 /**********************************************************************/
 246
 247 struct program_parameter_list *
 248 _mesa_new_parameter_list(void)
 249 {
 250    return (struct program_parameter_list *)
 251       _mesa_calloc(sizeof(struct program_parameter_list));
 252 }
 253
 254
 255 /**
 256  * Free a parameter list and all its parameters
 257  */
 258 void
 259 _mesa_free_parameter_list(struct program_parameter_list *paramList)
 260 {
 261    _mesa_free_parameters(paramList);
 262    _mesa_free(paramList);
 263 }
 264
 265
 266 /**
 267  * Free all the parameters in the given list, but don't free the
 268  * paramList structure itself.
 269  */
 270 void
 271 _mesa_free_parameters(struct program_parameter_list *paramList)
 272 {
 273    GLuint i;
 274    for (i = 0; i < paramList->NumParameters; i++) {
 275       _mesa_free((void *) paramList->Parameters[i].Name);
 276    }
 277    _mesa_free(paramList->Parameters);
 278    paramList->NumParameters = 0;
 279    paramList->Parameters = NULL;
 280 }
 281
 282
 283 /**
 284  * Helper function used by the functions below.
 285  */
 286 static GLint
 287 add_parameter(struct program_parameter_list *paramList,
 288               const char *name, const GLfloat values[4],
 289               enum parameter_type type)
 290 {
 291    const GLuint n = paramList->NumParameters;
 292
 293    paramList->Parameters = (struct program_parameter *)
 294       _mesa_realloc(paramList->Parameters,
 295                     n * sizeof(struct program_parameter),
 296                     (n + 1) * sizeof(struct program_parameter));
 297    if (!paramList->Parameters) {
 298       /* out of memory */
 299       paramList->NumParameters = 0;
 300       return -1;
 301    }
 302    else {
 303       paramList->NumParameters = n + 1;
 304       paramList->Parameters[n].Name = _mesa_strdup(name);
 305       paramList->Parameters[n].Type = type;
 306       if (values)
 307          COPY_4V(paramList->Parameters[n].Values, values);
 308       return (GLint) n;
 309    }
 310 }
 311
 312
 313 /**
 314  * Add a new named program parameter (Ex: NV_fragment_program DEFINE statement)
 315  * \return index of the new entry in the parameter list
 316  */
 317 GLint
 318 _mesa_add_named_parameter(struct program_parameter_list *paramList,
 319                           const char *name, const GLfloat values[4])
 320 {
 321    return add_parameter(paramList, name, values, NAMED_PARAMETER);
 322 }
 323
 324
 325 /**
 326  * Add a new unnamed constant to the parameter list.
 327  * \param paramList - the parameter list
 328  * \param values - four float values
 329  * \return index of the new parameter.
 330  */
 331 GLint
 332 _mesa_add_named_constant(struct program_parameter_list *paramList,
 333                          const char *name, const GLfloat values[4])
 334 {
 335    return add_parameter(paramList, name, values, CONSTANT);
 336 }
 337
 338
 339 /**
 340  * Add a new unnamed constant to the parameter list.
 341  * \param paramList - the parameter list
 342  * \param values - four float values
 343  * \return index of the new parameter.
 344  */
 345 GLint
 346 _mesa_add_unnamed_constant(struct program_parameter_list *paramList,
 347                            const GLfloat values[4])
 348 {
 349    /* generate a new dummy name */
 350    static GLuint n = 0;
 351    char name[20];
 352    _mesa_sprintf(name, "constant%d", n);
 353    n++;
 354    /* store it */
 355    return add_parameter(paramList, name, values, CONSTANT);
 356 }
 357
 358
 359 /**
 360  * Add a new state reference to the parameter list.
 361  * \param paramList - the parameter list
 362  * \param state     - an array of 6 state tokens
 363  *
 364  * \return index of the new parameter.
 365  */
 366 GLint
 367 _mesa_add_state_reference(struct program_parameter_list *paramList,
 368                           GLint *stateTokens)
 369 {
 370    /* XXX Should we parse <stateString> here and produce the parameter's
 371     * list of STATE_* tokens here, or in the parser?
 372     */
 373    GLint a, idx;
 374
 375    idx = add_parameter(paramList, "Some State", NULL, STATE);
 376
 377    for (a=0; a<6; a++)
 378       paramList->Parameters[idx].StateIndexes[a] = (enum state_index) stateTokens[a];
 379
 380    return idx;
 381 }
 382
 383
 384 /**
 385  * Lookup a parameter value by name in the given parameter list.
 386  * \return pointer to the float[4] values.
 387  */
 388 GLfloat *
 389 _mesa_lookup_parameter_value(struct program_parameter_list *paramList,
 390                              GLsizei nameLen, const char *name)
 391 {
 392    GLuint i;
 393
 394    if (nameLen == -1) {
 395       /* name is null-terminated */
 396       for (i = 0; i < paramList->NumParameters; i++) {
 397          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 398             return paramList->Parameters[i].Values;
 399       }
 400    }
 401    else {
 402       /* name is not null-terminated, use nameLen */
 403       for (i = 0; i < paramList->NumParameters; i++) {
 404          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 405              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 406             return paramList->Parameters[i].Values;
 407       }
 408    }
 409    return NULL;
 410 }
 411
 412
 413 /**
 414  * Lookup a parameter index by name in the given parameter list.
 415  * \return index of parameter in the list.
 416  */
 417 GLint
 418 _mesa_lookup_parameter_index(struct program_parameter_list *paramList,
 419                              GLsizei nameLen, const char *name)
 420 {
 421    GLint i;
 422
 423    if (nameLen == -1) {
 424       /* name is null-terminated */
 425       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 426          if (_mesa_strcmp(paramList->Parameters[i].Name, name) == 0)
 427             return i;
 428       }
 429    }
 430    else {
 431       /* name is not null-terminated, use nameLen */
 432       for (i = 0; i < (GLint) paramList->NumParameters; i++) {
 433          if (_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
 434              && _mesa_strlen(paramList->Parameters[i].Name) == (size_t)nameLen)
 435             return i;
 436       }
 437    }
 438    return -1;
 439 }
 440
 441
 442 /**
 443  * Use the list of tokens in the state[] array to find global GL state
 444  * and return it in <value>.  Usually, four values are returned in <value>
 445  * but matrix queries may return as many as 16 values.
 446  * This function is used for ARB vertex/fragment programs.
 447  * The program parser will produce the state[] values.
 448  */
 449 static void
 450 _mesa_fetch_state(GLcontext *ctx, const enum state_index state[],
 451                   GLfloat *value)
 452 {
 453    switch (state[0]) {
 454    case STATE_MATERIAL:
 455       {
 456          /* state[1] is either 0=front or 1=back side */
 457          const GLuint face = (GLuint) state[1];
 458          /* state[2] is the material attribute */
 459          switch (state[2]) {
 460          case STATE_AMBIENT:
 461             if (face == 0)
 462                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT]);
 463             else
 464                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT]);
 465             return;
 466          case STATE_DIFFUSE:
 467             if (face == 0)
 468                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE]);
 469             else
 470                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE]);
 471             return;
 472          case STATE_SPECULAR:
 473             if (face == 0)
 474                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR]);
 475             else
 476                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SPECULAR]);
 477             return;
 478          case STATE_EMISSION:
 479             if (face == 0)
 480                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION]);
 481             else
 482                COPY_4V(value, ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION]);
 483             return;
 484          case STATE_SHININESS:
 485             if (face == 0)
 486                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SHININESS][0];
 487             else
 488                value[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_SHININESS][0];
 489             value[1] = 0.0F;
 490             value[2] = 0.0F;
 491             value[3] = 1.0F;
 492             return;
 493          default:
 494             _mesa_problem(ctx, "Invalid material state in fetch_state");
 495             return;
 496          }
 497       };
 498       return;
 499    case STATE_LIGHT:
 500       {
 501          /* state[1] is the light number */
 502          const GLuint ln = (GLuint) state[1];
 503          /* state[2] is the light attribute */
 504          switch (state[2]) {
 505          case STATE_AMBIENT:
 506             COPY_4V(value, ctx->Light.Light[ln].Ambient);
 507             return;
 508          case STATE_DIFFUSE:
 509             COPY_4V(value, ctx->Light.Light[ln].Diffuse);
 510             return;
 511          case STATE_SPECULAR:
 512             COPY_4V(value, ctx->Light.Light[ln].Specular);
 513             return;
 514          case STATE_POSITION:
 515             COPY_4V(value, ctx->Light.Light[ln].EyePosition);
 516             return;
 517          case STATE_ATTENUATION:
 518             value[0] = ctx->Light.Light[ln].ConstantAttenuation;
 519             value[1] = ctx->Light.Light[ln].LinearAttenuation;
 520             value[2] = ctx->Light.Light[ln].QuadraticAttenuation;
 521             value[3] = ctx->Light.Light[ln].SpotExponent;
 522             return;
 523          case STATE_SPOT_DIRECTION:
 524             COPY_4V(value, ctx->Light.Light[ln].EyeDirection);
 525             return;
 526          case STATE_HALF:
 527             {
 528                GLfloat eye_z[] = {0, 0, 1};
 529
 530                /* Compute infinite half angle vector:
 531                 *   half-vector = light_position + (0, 0, 1)
 532                 * and then normalize.  w = 0
 533                                          *
 534                                          * light.EyePosition.w should be 0 for infinite lights.
 535                 */
 536                                         ADD_3V(value, eye_z, ctx->Light.Light[ln].EyePosition);
 537                                         NORMALIZE_3FV(value);
 538                                         value[3] = 0;
 539             }
 540             return;
 541          default:
 542             _mesa_problem(ctx, "Invalid light state in fetch_state");
 543             return;
 544          }
 545       }
 546       return;
 547    case STATE_LIGHTMODEL_AMBIENT:
 548       COPY_4V(value, ctx->Light.Model.Ambient);
 549       return;
 550    case STATE_LIGHTMODEL_SCENECOLOR:
 551       if (state[1] == 0) {
 552          /* front */
 553          GLint i;
 554          for (i = 0; i < 4; i++) {
 555             value[i] = ctx->Light.Model.Ambient[i]
 556                * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]
 557                + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];
 558          }
 559       }
 560       else {
 561          /* back */
 562          GLint i;
 563          for (i = 0; i < 4; i++) {
 564             value[i] = ctx->Light.Model.Ambient[i]
 565                * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]
 566                + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];
 567          }
 568       }
 569       return;
 570    case STATE_LIGHTPROD:
 571       {
 572          const GLuint ln = (GLuint) state[1];
 573          const GLuint face = (GLuint) state[2];
 574          GLint i;
 575          ASSERT(face == 0 || face == 1);
 576          switch (state[3]) {
 577             case STATE_AMBIENT:
 578                for (i = 0; i < 3; i++) {
 579                   value[i] = ctx->Light.Light[ln].Ambient[i] *
 580                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];
 581                }
 582                /* [3] = material alpha */
 583                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 584                return;
 585             case STATE_DIFFUSE:
 586                for (i = 0; i < 3; i++) {
 587                   value[i] = ctx->Light.Light[ln].Diffuse[i] *
 588                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];
 589                }
 590                /* [3] = material alpha */
 591                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 592                return;
 593             case STATE_SPECULAR:
 594                for (i = 0; i < 3; i++) {
 595                   value[i] = ctx->Light.Light[ln].Specular[i] *
 596                      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];
 597                }
 598                /* [3] = material alpha */
 599                value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
 600                return;
 601             default:
 602                _mesa_problem(ctx, "Invalid lightprod state in fetch_state");
 603                return;
 604          }
 605       }
 606       return;
 607    case STATE_TEXGEN:
 608       {
 609          /* state[1] is the texture unit */
 610          const GLuint unit = (GLuint) state[1];
 611          /* state[2] is the texgen attribute */
 612          switch (state[2]) {
 613          case STATE_TEXGEN_EYE_S:
 614             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneS);
 615             return;
 616          case STATE_TEXGEN_EYE_T:
 617             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneT);
 618             return;
 619          case STATE_TEXGEN_EYE_R:
 620             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneR);
 621             return;
 622          case STATE_TEXGEN_EYE_Q:
 623             COPY_4V(value, ctx->Texture.Unit[unit].EyePlaneQ);
 624             return;
 625          case STATE_TEXGEN_OBJECT_S:
 626             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneS);
 627             return;
 628          case STATE_TEXGEN_OBJECT_T:
 629             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneT);
 630             return;
 631          case STATE_TEXGEN_OBJECT_R:
 632             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneR);
 633             return;
 634          case STATE_TEXGEN_OBJECT_Q:
 635             COPY_4V(value, ctx->Texture.Unit[unit].ObjectPlaneQ);
 636             return;
 637          default:
 638             _mesa_problem(ctx, "Invalid texgen state in fetch_state");
 639             return;
 640          }
 641       }
 642       return;
 643    case STATE_TEXENV_COLOR:
 644       {
 645          /* state[1] is the texture unit */
 646          const GLuint unit = (GLuint) state[1];
 647          COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);
 648       }
 649       return;
 650    case STATE_FOG_COLOR:
 651       COPY_4V(value, ctx->Fog.Color);
 652       return;
 653    case STATE_FOG_PARAMS:
 654       value[0] = ctx->Fog.Density;
 655       value[1] = ctx->Fog.Start;
 656       value[2] = ctx->Fog.End;
 657       value[3] = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
 658       return;
 659    case STATE_CLIPPLANE:
 660       {
 661          const GLuint plane = (GLuint) state[1];
 662          COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);
 663       }
 664       return;
 665    case STATE_POINT_SIZE:
 666       value[0] = ctx->Point.Size;
 667       value[1] = ctx->Point.MinSize;
 668       value[2] = ctx->Point.MaxSize;
 669       value[3] = ctx->Point.Threshold;
 670       return;
 671    case STATE_POINT_ATTENUATION:
 672       value[0] = ctx->Point.Params[0];
 673       value[1] = ctx->Point.Params[1];
 674       value[2] = ctx->Point.Params[2];
 675       value[3] = 1.0F;
 676       return;
 677    case STATE_MATRIX:
 678       {
 679          /* state[1] = modelview, projection, texture, etc. */
 680          /* state[2] = which texture matrix or program matrix */
 681          /* state[3] = first column to fetch */
 682          /* state[4] = last column to fetch */
 683          /* state[5] = transpose, inverse or invtrans */
 684
 685          const GLmatrix *matrix;
 686          const enum state_index mat = state[1];
 687          const GLuint index = (GLuint) state[2];
 688          const GLuint first = (GLuint) state[3];
 689          const GLuint last = (GLuint) state[4];
 690          const enum state_index modifier = state[5];
 691          const GLfloat *m;
 692          GLuint row, i;
 693          if (mat == STATE_MODELVIEW) {
 694             matrix = ctx->ModelviewMatrixStack.Top;
 695          }
 696          else if (mat == STATE_PROJECTION) {
 697             matrix = ctx->ProjectionMatrixStack.Top;
 698          }
 699          else if (mat == STATE_MVP) {
 700             matrix = &ctx->_ModelProjectMatrix;
 701          }
 702          else if (mat == STATE_TEXTURE) {
 703             matrix = ctx->TextureMatrixStack[index].Top;
 704          }
 705          else if (mat == STATE_PROGRAM) {
 706             matrix = ctx->ProgramMatrixStack[index].Top;
 707          }
 708          else {
 709             _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");
 710             return;
 711          }
 712          if (modifier == STATE_MATRIX_INVERSE ||
 713              modifier == STATE_MATRIX_INVTRANS) {
 714             /* XXX be sure inverse is up to date */
 715             m = matrix->inv;
 716          }
 717          else {
 718             m = matrix->m;
 719          }
 720          if (modifier == STATE_MATRIX_TRANSPOSE ||
 721              modifier == STATE_MATRIX_INVTRANS) {
 722             for (i = 0, row = first; row <= last; row++) {
 723                value[i++] = m[row * 4 + 0];
 724                value[i++] = m[row * 4 + 1];
 725                value[i++] = m[row * 4 + 2];
 726                value[i++] = m[row * 4 + 3];
 727             }
 728          }
 729          else {
 730             for (i = 0, row = first; row <= last; row++) {
 731                value[i++] = m[row + 0];
 732                value[i++] = m[row + 4];
 733                value[i++] = m[row + 8];
 734                value[i++] = m[row + 12];
 735             }
 736          }
 737       }
 738       return;
 739    case STATE_DEPTH_RANGE:
 740       value[0] = ctx->Viewport.Near;                     /* near       */
 741       value[1] = ctx->Viewport.Far;                      /* far        */
 742       value[2] = ctx->Viewport.Far - ctx->Viewport.Near; /* far - near */
 743       value[3] = 0;
 744       return;
 745    case STATE_FRAGMENT_PROGRAM:
 746       {
 747          /* state[1] = {STATE_ENV, STATE_LOCAL} */
 748          /* state[2] = parameter index          */
 749          int idx = state[2];
 750
 751          switch (state[1]) {
 752             case STATE_ENV:
 753                COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);
 754                break;
 755
 756             case STATE_LOCAL:
 757                COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]);
 758                break;
 759             default:
 760                _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
 761                return;
 762          }
 763       }
 764       return;
 765
 766    case STATE_VERTEX_PROGRAM:
 767       {
 768          /* state[1] = {STATE_ENV, STATE_LOCAL} */
 769          /* state[2] = parameter index          */
 770          int idx = state[2];
 771
 772          switch (state[1]) {
 773             case STATE_ENV:
 774                COPY_4V(value, ctx->VertexProgram.Parameters[idx]);
 775                break;
 776
 777             case STATE_LOCAL:
 778                COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]);
 779                break;
 780             default:
 781                _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
 782                return;
 783          }
 784       }
 785       return;
 786    default:
 787       _mesa_problem(ctx, "Invalid state in fetch_state");
 788       return;
 789    }
 790 }
 791
 792
 793 /**
 794  * Loop over all the parameters in a parameter list.  If the parameter
 795  * is a GL state reference, look up the current value of that state
 796  * variable and put it into the parameter's Value[4] array.
 797  * This would be called at glBegin time when using a fragment program.
 798  */
 799 void
 800 _mesa_load_state_parameters(GLcontext *ctx,
 801                             struct program_parameter_list *paramList)
 802 {
 803    GLuint i;
 804    for (i = 0; i < paramList->NumParameters; i++) {
 805       if (paramList->Parameters[i].Type == STATE) {
 806          _mesa_fetch_state(ctx, paramList->Parameters[i].StateIndexes,
 807                            paramList->Parameters[i].Values);
 808       }
 809    }
 810 }
 811
 812
 813
 814 /**********************************************************************/
 815 /* API functions                                                      */
 816 /**********************************************************************/
 817
 818
 819 /**
 820  * Bind a program (make it current)
 821  * \note Called from the GL API dispatcher by both glBindProgramNV
 822  * and glBindProgramARB.
 823  */
 824 void GLAPIENTRY
 825 _mesa_BindProgram(GLenum target, GLuint id)
 826 {
 827    struct program *prog;
 828    GET_CURRENT_CONTEXT(ctx);
 829    ASSERT_OUTSIDE_BEGIN_END(ctx);
 830
 831    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 832
 833    if ((target == GL_VERTEX_PROGRAM_NV
 834         && ctx->Extensions.NV_vertex_program) ||
 835        (target == GL_VERTEX_PROGRAM_ARB
 836         && ctx->Extensions.ARB_vertex_program)) {
 837       if (ctx->VertexProgram.Current &&
 838           ctx->VertexProgram.Current->Base.Id == id)
 839          return;
 840       /* decrement refcount on previously bound vertex program */
 841       if (ctx->VertexProgram.Current) {
 842          ctx->VertexProgram.Current->Base.RefCount--;
 843          /* and delete if refcount goes below one */
 844          if (ctx->VertexProgram.Current->Base.RefCount <= 0) {
 845             ctx->Driver.DeleteProgram(ctx, &(ctx->VertexProgram.Current->Base));
 846             _mesa_HashRemove(ctx->Shared->Programs, id);
 847          }
 848       }
 849    }
 850    else if ((target == GL_FRAGMENT_PROGRAM_NV
 851              && ctx->Extensions.NV_fragment_program) ||
 852             (target == GL_FRAGMENT_PROGRAM_ARB
 853              && ctx->Extensions.ARB_fragment_program)) {
 854       if (ctx->FragmentProgram.Current &&
 855           ctx->FragmentProgram.Current->Base.Id == id)
 856          return;
 857       /* decrement refcount on previously bound fragment program */
 858       if (ctx->FragmentProgram.Current) {
 859          ctx->FragmentProgram.Current->Base.RefCount--;
 860          /* and delete if refcount goes below one */
 861          if (ctx->FragmentProgram.Current->Base.RefCount <= 0) {
 862             ctx->Driver.DeleteProgram(ctx, &(ctx->FragmentProgram.Current->Base));
 863             _mesa_HashRemove(ctx->Shared->Programs, id);
 864          }
 865       }
 866    }
 867    else {
 868       _mesa_error(ctx, GL_INVALID_ENUM, "glBindProgramNV/ARB(target)");
 869       return;
 870    }
 871
 872    /* NOTE: binding to a non-existant program is not an error.
 873     * That's supposed to be caught in glBegin.
 874     */
 875    if (id == 0) {
 876       /* default program */
 877       prog = NULL;
 878       if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB)
 879          prog = ctx->Shared->DefaultVertexProgram;
 880       else
 881          prog = ctx->Shared->DefaultFragmentProgram;
 882    }
 883    else {
 884       prog = (struct program *) _mesa_HashLookup(ctx->Shared->Programs, id);
 885       if (prog) {
 886          if (prog->Target == 0) {
 887             /* prog was allocated with glGenProgramsNV */
 888             prog->Target = target;
 889          }
 890          else if (prog->Target != target) {
 891             _mesa_error(ctx, GL_INVALID_OPERATION,
 892                         "glBindProgramNV/ARB(target mismatch)");
 893             return;
 894          }
 895       }
 896       else {
 897          /* allocate a new program now */
 898          prog = ctx->Driver.NewProgram(ctx, target, id);
 899          if (!prog) {
 900             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindProgramNV/ARB");
 901             return;
 902          }
 903          prog->Id = id;
 904          prog->Target = target;
 905          prog->Resident = GL_TRUE;
 906          prog->RefCount = 1;
 907          _mesa_HashInsert(ctx->Shared->Programs, id, prog);
 908       }
 909    }
 910
 911    /* bind now */
 912    if (target == GL_VERTEX_PROGRAM_NV || target == GL_VERTEX_PROGRAM_ARB) {
 913       ctx->VertexProgram.Current = (struct vertex_program *) prog;
 914    }
 915    else if (target == GL_FRAGMENT_PROGRAM_NV || target == GL_FRAGMENT_PROGRAM_ARB) {
 916       ctx->FragmentProgram.Current = (struct fragment_program *) prog;
 917    }
 918
 919    if (prog)
 920       prog->RefCount++;
 921
 922    if (ctx->Driver.BindProgram)
 923       ctx->Driver.BindProgram(ctx, target, prog);
 924 }
 925
 926
 927 /**
 928  * Delete a list of programs.
 929  * \note Not compiled into display lists.
 930  * \note Called by both glDeleteProgramsNV and glDeleteProgramsARB.
 931  */
 932 void GLAPIENTRY
 933 _mesa_DeletePrograms(GLsizei n, const GLuint *ids)
 934 {
 935    GLint i;
 936    GET_CURRENT_CONTEXT(ctx);
 937    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 938
 939    if (n < 0) {
 940       _mesa_error( ctx, GL_INVALID_VALUE, "glDeleteProgramsNV" );
 941       return;
 942    }
 943
 944    for (i = 0; i < n; i++) {
 945       if (ids[i] != 0) {
 946          struct program *prog = (struct program *)
 947             _mesa_HashLookup(ctx->Shared->Programs, ids[i]);
 948          if (prog) {
 949             if (prog->Target == GL_VERTEX_PROGRAM_NV ||
 950                 prog->Target == GL_VERTEX_STATE_PROGRAM_NV) {
 951                if (ctx->VertexProgram.Current &&
 952                    ctx->VertexProgram.Current->Base.Id == ids[i]) {
 953                   /* unbind this currently bound program */
 954                   _mesa_BindProgram(prog->Target, 0);
 955                }
 956             }
 957             else if (prog->Target == GL_FRAGMENT_PROGRAM_NV ||
 958                      prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
 959                if (ctx->FragmentProgram.Current &&
 960                    ctx->FragmentProgram.Current->Base.Id == ids[i]) {
 961                   /* unbind this currently bound program */
 962                   _mesa_BindProgram(prog->Target, 0);
 963                }
 964             }
 965             else {
 966                _mesa_problem(ctx, "bad target in glDeleteProgramsNV");
 967                return;
 968             }
 969             prog->RefCount--;
 970             if (prog->RefCount <= 0) {
 971                ctx->Driver.DeleteProgram(ctx, prog);
 972             }
 973          }
 974          else {
 975             /* This is necessary as we can't tell from HashLookup
 976              * whether the entry exists with data == 0, or if it
 977              * doesn't exist at all.  As GenPrograms creates the first
 978              * case below, need to call Remove() to avoid memory leak:
 979              */
 980             _mesa_HashRemove(ctx->Shared->Programs, ids[i]);
 981          }
 982       }
 983    }
 984 }
 985
 986
 987 /**
 988  * Generate a list of new program identifiers.
 989  * \note Not compiled into display lists.
 990  * \note Called by both glGenProgramsNV and glGenProgramsARB.
 991  */
 992 void GLAPIENTRY
 993 _mesa_GenPrograms(GLsizei n, GLuint *ids)
 994 {
 995    GLuint first;
 996    GLuint i;
 997    GET_CURRENT_CONTEXT(ctx);
 998    ASSERT_OUTSIDE_BEGIN_END(ctx);
 999
1000    if (n < 0) {
1001       _mesa_error(ctx, GL_INVALID_VALUE, "glGenPrograms");
1002       return;
1003    }
1004
1005    if (!ids)
1006       return;
1007
1008    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->Programs, n);
1009
1010    for (i = 0; i < (GLuint) n; i++) {
1011       _mesa_HashInsert(ctx->Shared->Programs, first + i, 0);
1012    }
1013
1014    /* Return the program names */
1015    for (i = 0; i < (GLuint) n; i++) {
1016       ids[i] = first + i;
1017    }
1018 }
1019
1020
1021 /**
1022  * Determine if id names a program.
1023  * \note Not compiled into display lists.
1024  * \note Called from both glIsProgramNV and glIsProgramARB.
1025  * \param id is the program identifier
1026  * \return GL_TRUE if id is a program, else GL_FALSE.
1027  */
1028 GLboolean GLAPIENTRY
1029 _mesa_IsProgram(GLuint id)
1030 {
1031    GET_CURRENT_CONTEXT(ctx);
1032    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1033
1034    if (id == 0)
1035       return GL_FALSE;
1036
1037    if (_mesa_HashLookup(ctx->Shared->Programs, id))
1038       return GL_TRUE;
1039    else
1040       return GL_FALSE;
1041 }
1042
1043
1044
1045 /**********************************************************************/
1046 /* GL_MESA_program_debug extension                                    */
1047 /**********************************************************************/
1048
1049
1050 /* XXX temporary */
1051 void
1052 glProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
1053                       GLvoid *data)
1054 {
1055    _mesa_ProgramCallbackMESA(target, callback, data);
1056 }
1057
1058
1059 void
1060 _mesa_ProgramCallbackMESA(GLenum target, GLprogramcallbackMESA callback,
1061                           GLvoid *data)
1062 {
1063    GET_CURRENT_CONTEXT(ctx);
1064
1065    switch (target) {
1066       case GL_FRAGMENT_PROGRAM_ARB:
1067          if (!ctx->Extensions.ARB_fragment_program) {
1068             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1069             return;
1070          }
1071          ctx->FragmentProgram.Callback = callback;
1072          ctx->FragmentProgram.CallbackData = data;
1073          break;
1074       case GL_FRAGMENT_PROGRAM_NV:
1075          if (!ctx->Extensions.NV_fragment_program) {
1076             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1077             return;
1078          }
1079          ctx->FragmentProgram.Callback = callback;
1080          ctx->FragmentProgram.CallbackData = data;
1081          break;
1082       case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
1083          if (!ctx->Extensions.ARB_vertex_program &&
1084              !ctx->Extensions.NV_vertex_program) {
1085             _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1086             return;
1087          }
1088          ctx->VertexProgram.Callback = callback;
1089          ctx->VertexProgram.CallbackData = data;
1090          break;
1091       default:
1092          _mesa_error(ctx, GL_INVALID_ENUM, "glProgramCallbackMESA(target)");
1093          return;
1094    }
1095 }
1096
1097
1098 /* XXX temporary */
1099 void
1100 glGetProgramRegisterfvMESA(GLenum target,
1101                            GLsizei len, const GLubyte *registerName,
1102                            GLfloat *v)
1103 {
1104    _mesa_GetProgramRegisterfvMESA(target, len, registerName, v);
1105 }
1106
1107
1108 void
1109 _mesa_GetProgramRegisterfvMESA(GLenum target,
1110                                GLsizei len, const GLubyte *registerName,
1111                                GLfloat *v)
1112 {
1113    char reg[1000];
1114    GET_CURRENT_CONTEXT(ctx);
1115
1116    /* We _should_ be inside glBegin/glEnd */
1117 #if 0
1118    if (ctx->Driver.CurrentExecPrimitive == PRIM_OUTSIDE_BEGIN_END) {
1119       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramRegisterfvMESA");
1120       return;
1121    }
1122 #endif
1123
1124    /* make null-terminated copy of registerName */
1125    len = MIN2((unsigned int) len, sizeof(reg) - 1);
1126    _mesa_memcpy(reg, registerName, len);
1127    reg[len] = 0;
1128
1129    switch (target) {
1130       case GL_VERTEX_PROGRAM_NV:
1131          if (!ctx->Extensions.ARB_vertex_program &&
1132              !ctx->Extensions.NV_vertex_program) {
1133             _mesa_error(ctx, GL_INVALID_ENUM,
1134                         "glGetProgramRegisterfvMESA(target)");
1135             return;
1136          }
1137          if (!ctx->VertexProgram.Enabled) {
1138             _mesa_error(ctx, GL_INVALID_OPERATION,
1139                         "glGetProgramRegisterfvMESA");
1140             return;
1141          }
1142          /* GL_NV_vertex_program */
1143          if (reg[0] == 'R') {
1144             /* Temp register */
1145             GLint i = _mesa_atoi(reg + 1);
1146             if (i >= (GLint)ctx->Const.MaxVertexProgramTemps) {
1147                _mesa_error(ctx, GL_INVALID_VALUE,
1148                            "glGetProgramRegisterfvMESA(registerName)");
1149                return;
1150             }
1151             COPY_4V(v, ctx->VertexProgram.Temporaries[i]);
1152          }
1153          else if (reg[0] == 'v' && reg[1] == '[') {
1154             /* Vertex Input attribute */
1155             GLuint i;
1156             for (i = 0; i < ctx->Const.MaxVertexProgramAttribs; i++) {
1157                const char *name = _mesa_nv_vertex_input_register_name(i);
1158                char number[10];
1159                sprintf(number, "%d", i);
1160                if (_mesa_strncmp(reg + 2, name, 4) == 0 ||
1161                    _mesa_strncmp(reg + 2, number, _mesa_strlen(number)) == 0) {
1162                   COPY_4V(v, ctx->VertexProgram.Inputs[i]);
1163                   return;
1164                }
1165             }
1166             _mesa_error(ctx, GL_INVALID_VALUE,
1167                         "glGetProgramRegisterfvMESA(registerName)");
1168             return;
1169          }
1170          else if (reg[0] == 'o' && reg[1] == '[') {
1171             /* Vertex output attribute */
1172          }
1173          /* GL_ARB_vertex_program */
1174          else if (_mesa_strncmp(reg, "vertex.", 7) == 0) {
1175
1176          }
1177          else {
1178             _mesa_error(ctx, GL_INVALID_VALUE,
1179                         "glGetProgramRegisterfvMESA(registerName)");
1180             return;
1181          }
1182          break;
1183       case GL_FRAGMENT_PROGRAM_ARB:
1184          if (!ctx->Extensions.ARB_fragment_program) {
1185             _mesa_error(ctx, GL_INVALID_ENUM,
1186                         "glGetProgramRegisterfvMESA(target)");
1187             return;
1188          }
1189          if (!ctx->FragmentProgram.Enabled) {
1190             _mesa_error(ctx, GL_INVALID_OPERATION,
1191                         "glGetProgramRegisterfvMESA");
1192             return;
1193          }
1194          /* XXX to do */
1195          break;
1196       case GL_FRAGMENT_PROGRAM_NV:
1197          if (!ctx->Extensions.NV_fragment_program) {
1198             _mesa_error(ctx, GL_INVALID_ENUM,
1199                         "glGetProgramRegisterfvMESA(target)");
1200             return;
1201          }
1202          if (!ctx->FragmentProgram.Enabled) {
1203             _mesa_error(ctx, GL_INVALID_OPERATION,
1204                         "glGetProgramRegisterfvMESA");
1205             return;
1206          }
1207          if (reg[0] == 'R') {
1208             /* Temp register */
1209             GLint i = _mesa_atoi(reg + 1);
1210             if (i >= (GLint)ctx->Const.MaxFragmentProgramTemps) {
1211                _mesa_error(ctx, GL_INVALID_VALUE,
1212                            "glGetProgramRegisterfvMESA(registerName)");
1213                return;
1214             }
1215             COPY_4V(v, ctx->FragmentProgram.Machine.Temporaries[i]);
1216          }
1217          else if (reg[0] == 'f' && reg[1] == '[') {
1218             /* Fragment input attribute */
1219             GLuint i;
1220             for (i = 0; i < ctx->Const.MaxFragmentProgramAttribs; i++) {
1221                const char *name = _mesa_nv_fragment_input_register_name(i);
1222                if (_mesa_strncmp(reg + 2, name, 4) == 0) {
1223                   COPY_4V(v, ctx->FragmentProgram.Machine.Inputs[i]);
1224                   return;
1225                }
1226             }
1227             _mesa_error(ctx, GL_INVALID_VALUE,
1228                         "glGetProgramRegisterfvMESA(registerName)");
1229             return;
1230          }
1231          else if (_mesa_strcmp(reg, "o[COLR]") == 0) {
1232             /* Fragment output color */
1233             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLR]);
1234          }
1235          else if (_mesa_strcmp(reg, "o[COLH]") == 0) {
1236             /* Fragment output color */
1237             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_COLH]);
1238          }
1239          else if (_mesa_strcmp(reg, "o[DEPR]") == 0) {
1240             /* Fragment output depth */
1241             COPY_4V(v, ctx->FragmentProgram.Machine.Outputs[FRAG_OUTPUT_DEPR]);
1242          }
1243          else {
1244             /* try user-defined identifiers */
1245             const GLfloat *value = _mesa_lookup_parameter_value(
1246                        ctx->FragmentProgram.Current->Parameters, -1, reg);
1247             if (value) {
1248                COPY_4V(v, value);
1249             }
1250             else {
1251                _mesa_error(ctx, GL_INVALID_VALUE,
1252                            "glGetProgramRegisterfvMESA(registerName)");
1253                return;
1254             }
1255          }
1256          break;
1257       default:
1258          _mesa_error(ctx, GL_INVALID_ENUM,
1259                      "glGetProgramRegisterfvMESA(target)");
1260          return;
1261    }
1262
1263 }