src/mesa/state_tracker/st_program.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Brian Paul
  31   */
  32
  33
  34 #include "main/imports.h"
  35 #include "main/mtypes.h"
  36 #include "program/prog_print.h"
  37 #include "program/programopt.h"
  38
  39 #include "pipe/p_context.h"
  40 #include "pipe/p_defines.h"
  41 #include "pipe/p_shader_tokens.h"
  42 #include "draw/draw_context.h"
  43 #include "tgsi/tgsi_dump.h"
  44 #include "tgsi/tgsi_ureg.h"
  45
  46 #include "st_debug.h"
  47 #include "st_context.h"
  48 #include "st_program.h"
  49 #include "st_mesa_to_tgsi.h"
  50 #include "cso_cache/cso_context.h"
  51
  52
  53
  54 /**
  55  * Clean out any old compilations:
  56  */
  57 void
  58 st_vp_release_varients( struct st_context *st,
  59                         struct st_vertex_program *stvp )
  60 {
  61    struct st_vp_varient *vpv;
  62
  63    for (vpv = stvp->varients; vpv; ) {
  64       struct st_vp_varient *next = vpv->next;
  65
  66       if (vpv->driver_shader)
  67          cso_delete_vertex_shader(st->cso_context, vpv->driver_shader);
  68
  69 #if FEATURE_feedback || FEATURE_rastpos
  70       if (vpv->draw_shader)
  71          draw_delete_vertex_shader( st->draw, vpv->draw_shader );
  72 #endif
  73
  74       if (vpv->tgsi.tokens)
  75          st_free_tokens(vpv->tgsi.tokens);
  76
  77       FREE( vpv );
  78
  79       vpv = next;
  80    }
  81
  82    stvp->varients = NULL;
  83 }
  84
  85
  86
  87
  88 /**
  89  * Translate a Mesa vertex shader into a TGSI shader.
  90  * \param outputMapping  to map vertex program output registers (VERT_RESULT_x)
  91  *       to TGSI output slots
  92  * \param tokensOut  destination for TGSI tokens
  93  * \return  pointer to cached pipe_shader object.
  94  */
  95 void
  96 st_prepare_vertex_program(struct st_context *st,
  97                             struct st_vertex_program *stvp)
  98 {
  99    GLuint attr;
 100
 101    stvp->num_inputs = 0;
 102    stvp->num_outputs = 0;
 103
 104    if (stvp->Base.IsPositionInvariant)
 105       _mesa_insert_mvp_code(st->ctx, &stvp->Base);
 106
 107    assert(stvp->Base.Base.NumInstructions > 1);
 108
 109    /*
 110     * Determine number of inputs, the mappings between VERT_ATTRIB_x
 111     * and TGSI generic input indexes, plus input attrib semantic info.
 112     */
 113    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 114       if (stvp->Base.Base.InputsRead & (1 << attr)) {
 115          stvp->input_to_index[attr] = stvp->num_inputs;
 116          stvp->index_to_input[stvp->num_inputs] = attr;
 117          stvp->num_inputs++;
 118       }
 119    }
 120    /* bit of a hack, presetup potentially unused edgeflag input */
 121    stvp->input_to_index[VERT_ATTRIB_EDGEFLAG] = stvp->num_inputs;
 122    stvp->index_to_input[stvp->num_inputs] = VERT_ATTRIB_EDGEFLAG;
 123
 124    /* Compute mapping of vertex program outputs to slots.
 125     */
 126    for (attr = 0; attr < VERT_RESULT_MAX; attr++) {
 127       if ((stvp->Base.Base.OutputsWritten & BITFIELD64_BIT(attr)) == 0) {
 128          stvp->result_to_output[attr] = ~0;
 129       }
 130       else {
 131          unsigned slot = stvp->num_outputs++;
 132
 133          stvp->result_to_output[attr] = slot;
 134
 135          switch (attr) {
 136          case VERT_RESULT_HPOS:
 137             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 138             stvp->output_semantic_index[slot] = 0;
 139             break;
 140          case VERT_RESULT_COL0:
 141             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 142             stvp->output_semantic_index[slot] = 0;
 143             break;
 144          case VERT_RESULT_COL1:
 145             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 146             stvp->output_semantic_index[slot] = 1;
 147             break;
 148          case VERT_RESULT_BFC0:
 149             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 150             stvp->output_semantic_index[slot] = 0;
 151             break;
 152          case VERT_RESULT_BFC1:
 153             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 154             stvp->output_semantic_index[slot] = 1;
 155             break;
 156          case VERT_RESULT_FOGC:
 157             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 158             stvp->output_semantic_index[slot] = 0;
 159             break;
 160          case VERT_RESULT_PSIZ:
 161             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 162             stvp->output_semantic_index[slot] = 0;
 163             break;
 164          case VERT_RESULT_EDGE:
 165             assert(0);
 166             break;
 167
 168          case VERT_RESULT_TEX0:
 169          case VERT_RESULT_TEX1:
 170          case VERT_RESULT_TEX2:
 171          case VERT_RESULT_TEX3:
 172          case VERT_RESULT_TEX4:
 173          case VERT_RESULT_TEX5:
 174          case VERT_RESULT_TEX6:
 175          case VERT_RESULT_TEX7:
 176             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 177             stvp->output_semantic_index[slot] = attr - VERT_RESULT_TEX0;
 178             break;
 179
 180          case VERT_RESULT_VAR0:
 181          default:
 182             assert(attr < VERT_RESULT_MAX);
 183             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 184             stvp->output_semantic_index[slot] = (FRAG_ATTRIB_VAR0 -
 185                                                 FRAG_ATTRIB_TEX0 +
 186                                                 attr -
 187                                                 VERT_RESULT_VAR0);
 188             break;
 189          }
 190       }
 191    }
 192    /* similar hack to above, presetup potentially unused edgeflag output */
 193    stvp->result_to_output[VERT_RESULT_EDGE] = stvp->num_outputs;
 194    stvp->output_semantic_name[stvp->num_outputs] = TGSI_SEMANTIC_EDGEFLAG;
 195    stvp->output_semantic_index[stvp->num_outputs] = 0;
 196 }
 197
 198
 199 struct st_vp_varient *
 200 st_translate_vertex_program(struct st_context *st,
 201                             struct st_vertex_program *stvp,
 202                             const struct st_vp_varient_key *key)
 203 {
 204    struct st_vp_varient *vpv = CALLOC_STRUCT(st_vp_varient);
 205    struct pipe_context *pipe = st->pipe;
 206    struct ureg_program *ureg;
 207    enum pipe_error error;
 208    unsigned num_outputs;
 209
 210    _mesa_remove_output_reads(&stvp->Base.Base, PROGRAM_OUTPUT);
 211    _mesa_remove_output_reads(&stvp->Base.Base, PROGRAM_VARYING);
 212
 213    ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
 214    if (ureg == NULL) {
 215       FREE(vpv);
 216       return NULL;
 217    }
 218
 219    vpv->num_inputs = stvp->num_inputs;
 220    num_outputs = stvp->num_outputs;
 221    if (key->passthrough_edgeflags) {
 222       vpv->num_inputs++;
 223       num_outputs++;
 224    }
 225
 226    if (ST_DEBUG & DEBUG_MESA) {
 227       _mesa_print_program(&stvp->Base.Base);
 228       _mesa_print_program_parameters(st->ctx, &stvp->Base.Base);
 229       debug_printf("\n");
 230    }
 231
 232    error =
 233       st_translate_mesa_program(st->ctx,
 234                                 TGSI_PROCESSOR_VERTEX,
 235                                 ureg,
 236                                 &stvp->Base.Base,
 237                                 /* inputs */
 238                                 vpv->num_inputs,
 239                                 stvp->input_to_index,
 240                                 NULL, /* input semantic name */
 241                                 NULL, /* input semantic index */
 242                                 NULL,
 243                                 /* outputs */
 244                                 num_outputs,
 245                                 stvp->result_to_output,
 246                                 stvp->output_semantic_name,
 247                                 stvp->output_semantic_index,
 248                                 key->passthrough_edgeflags );
 249
 250    if (error)
 251       goto fail;
 252
 253    vpv->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 254    if (!vpv->tgsi.tokens)
 255       goto fail;
 256
 257    ureg_destroy( ureg );
 258
 259    vpv->driver_shader = pipe->create_vs_state(pipe, &vpv->tgsi);
 260
 261    if (ST_DEBUG & DEBUG_TGSI) {
 262       tgsi_dump( vpv->tgsi.tokens, 0 );
 263       debug_printf("\n");
 264    }
 265
 266    return vpv;
 267
 268 fail:
 269    debug_printf("%s: failed to translate Mesa program:\n", __FUNCTION__);
 270    _mesa_print_program(&stvp->Base.Base);
 271    debug_assert(0);
 272
 273    ureg_destroy( ureg );
 274    return NULL;
 275 }
 276
 277
 278
 279 /**
 280  * Translate a Mesa fragment shader into a TGSI shader.
 281  * \return  pointer to cached pipe_shader object.
 282  */
 283 void
 284 st_translate_fragment_program(struct st_context *st,
 285                               struct st_fragment_program *stfp )
 286 {
 287    struct pipe_context *pipe = st->pipe;
 288    GLuint outputMapping[FRAG_RESULT_MAX];
 289    GLuint inputMapping[FRAG_ATTRIB_MAX];
 290    GLuint interpMode[PIPE_MAX_SHADER_INPUTS];  /* XXX size? */
 291    GLuint attr;
 292    enum pipe_error error;
 293    const GLbitfield inputsRead = stfp->Base.Base.InputsRead;
 294    struct ureg_program *ureg;
 295
 296    ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
 297    ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
 298    uint fs_num_inputs = 0;
 299
 300    ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 301    ubyte fs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 302    uint fs_num_outputs = 0;
 303
 304    _mesa_remove_output_reads(&stfp->Base.Base, PROGRAM_OUTPUT);
 305
 306    /*
 307     * Convert Mesa program inputs to TGSI input register semantics.
 308     */
 309    for (attr = 0; attr < FRAG_ATTRIB_MAX; attr++) {
 310       if (inputsRead & (1 << attr)) {
 311          const GLuint slot = fs_num_inputs++;
 312
 313          inputMapping[attr] = slot;
 314
 315          switch (attr) {
 316          case FRAG_ATTRIB_WPOS:
 317             input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 318             input_semantic_index[slot] = 0;
 319             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 320             break;
 321          case FRAG_ATTRIB_COL0:
 322             input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 323             input_semantic_index[slot] = 0;
 324             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 325             break;
 326          case FRAG_ATTRIB_COL1:
 327             input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 328             input_semantic_index[slot] = 1;
 329             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 330             break;
 331          case FRAG_ATTRIB_FOGC:
 332             input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 333             input_semantic_index[slot] = 0;
 334             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 335             break;
 336          case FRAG_ATTRIB_FACE:
 337             input_semantic_name[slot] = TGSI_SEMANTIC_FACE;
 338             input_semantic_index[slot] = 0;
 339             interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
 340             break;
 341          case FRAG_ATTRIB_PNTC:
 342             /* This is a hack.  We really need a new semantic label for
 343              * point coord.  The draw module needs to know which fragment
 344              * shader input is the point coord attribute so that it can set
 345              * up the right vertex attribute values.
 346              */
 347             input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 348             input_semantic_index[slot] = 0;
 349             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 350             break;
 351
 352             /* In most cases, there is nothing special about these
 353              * inputs, so adopt a convention to use the generic
 354              * semantic name and the mesa FRAG_ATTRIB_ number as the
 355              * index.
 356              *
 357              * All that is required is that the vertex shader labels
 358              * its own outputs similarly, and that the vertex shader
 359              * generates at least every output required by the
 360              * fragment shader plus fixed-function hardware (such as
 361              * BFC).
 362              *
 363              * There is no requirement that semantic indexes start at
 364              * zero or be restricted to a particular range -- nobody
 365              * should be building tables based on semantic index.
 366              */
 367          case FRAG_ATTRIB_TEX0:
 368          case FRAG_ATTRIB_TEX1:
 369          case FRAG_ATTRIB_TEX2:
 370          case FRAG_ATTRIB_TEX3:
 371          case FRAG_ATTRIB_TEX4:
 372          case FRAG_ATTRIB_TEX5:
 373          case FRAG_ATTRIB_TEX6:
 374          case FRAG_ATTRIB_TEX7:
 375          case FRAG_ATTRIB_VAR0:
 376          default:
 377             /* Actually, let's try and zero-base this just for
 378              * readability of the generated TGSI.
 379              */
 380             assert(attr >= FRAG_ATTRIB_TEX0);
 381             input_semantic_index[slot] = (attr - FRAG_ATTRIB_TEX0);
 382             input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 383             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 384             break;
 385          }
 386       }
 387       else {
 388          inputMapping[attr] = -1;
 389       }
 390    }
 391
 392    /*
 393     * Semantics and mapping for outputs
 394     */
 395    {
 396       uint numColors = 0;
 397       GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;
 398
 399       /* if z is written, emit that first */
 400       if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
 401          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
 402          fs_output_semantic_index[fs_num_outputs] = 0;
 403          outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
 404          fs_num_outputs++;
 405          outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
 406       }
 407
 408       /* handle remaning outputs (color) */
 409       for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
 410          if (outputsWritten & BITFIELD64_BIT(attr)) {
 411             switch (attr) {
 412             case FRAG_RESULT_DEPTH:
 413                /* handled above */
 414                assert(0);
 415                break;
 416             default:
 417                assert(attr == FRAG_RESULT_COLOR ||
 418                       (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
 419                fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
 420                fs_output_semantic_index[fs_num_outputs] = numColors;
 421                outputMapping[attr] = fs_num_outputs;
 422                numColors++;
 423                break;
 424             }
 425
 426             fs_num_outputs++;
 427          }
 428       }
 429    }
 430
 431    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 432    if (ureg == NULL)
 433       return;
 434
 435    if (ST_DEBUG & DEBUG_MESA) {
 436       _mesa_print_program(&stfp->Base.Base);
 437       _mesa_print_program_parameters(st->ctx, &stfp->Base.Base);
 438       debug_printf("\n");
 439    }
 440
 441    error =
 442       st_translate_mesa_program(st->ctx,
 443                                 TGSI_PROCESSOR_FRAGMENT,
 444                                 ureg,
 445                                 &stfp->Base.Base,
 446                                 /* inputs */
 447                                 fs_num_inputs,
 448                                 inputMapping,
 449                                 input_semantic_name,
 450                                 input_semantic_index,
 451                                 interpMode,
 452                                 /* outputs */
 453                                 fs_num_outputs,
 454                                 outputMapping,
 455                                 fs_output_semantic_name,
 456                                 fs_output_semantic_index, FALSE );
 457
 458    stfp->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 459    ureg_destroy( ureg );
 460    stfp->driver_shader = pipe->create_fs_state(pipe, &stfp->tgsi);
 461
 462    if (ST_DEBUG & DEBUG_TGSI) {
 463       tgsi_dump( stfp->tgsi.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
 464       debug_printf("\n");
 465    }
 466 }
 467
 468 void
 469 st_translate_geometry_program(struct st_context *st,
 470                               struct st_geometry_program *stgp)
 471 {
 472    GLuint inputMapping[GEOM_ATTRIB_MAX];
 473    GLuint outputMapping[GEOM_RESULT_MAX];
 474    struct pipe_context *pipe = st->pipe;
 475    enum pipe_error error;
 476    GLuint attr;
 477    const GLbitfield inputsRead = stgp->Base.Base.InputsRead;
 478    GLuint vslot = 0;
 479    GLuint num_generic = 0;
 480
 481    uint gs_num_inputs = 0;
 482    uint gs_builtin_inputs = 0;
 483    uint gs_array_offset = 0;
 484
 485    ubyte gs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 486    ubyte gs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 487    uint gs_num_outputs = 0;
 488
 489    GLint i;
 490    GLuint maxSlot = 0;
 491    struct ureg_program *ureg;
 492
 493    _mesa_remove_output_reads(&stgp->Base.Base, PROGRAM_OUTPUT);
 494    _mesa_remove_output_reads(&stgp->Base.Base, PROGRAM_VARYING);
 495
 496    ureg = ureg_create( TGSI_PROCESSOR_GEOMETRY );
 497    if (ureg == NULL) {
 498       return;
 499    }
 500
 501    /* which vertex output goes to the first geometry input */
 502    vslot = 0;
 503
 504    memset(inputMapping, 0, sizeof(inputMapping));
 505    memset(outputMapping, 0, sizeof(outputMapping));
 506
 507    /*
 508     * Convert Mesa program inputs to TGSI input register semantics.
 509     */
 510    for (attr = 0; attr < GEOM_ATTRIB_MAX; attr++) {
 511       if (inputsRead & (1 << attr)) {
 512          const GLuint slot = gs_num_inputs;
 513
 514          gs_num_inputs++;
 515
 516          inputMapping[attr] = slot;
 517
 518          stgp->input_map[slot + gs_array_offset] = vslot - gs_builtin_inputs;
 519          stgp->input_to_index[attr] = vslot;
 520          stgp->index_to_input[vslot] = attr;
 521          ++vslot;
 522
 523          if (attr != GEOM_ATTRIB_PRIMITIVE_ID) {
 524             gs_array_offset += 2;
 525          } else
 526             ++gs_builtin_inputs;
 527
 528 #if 1
 529          debug_printf("input map at %d = %d\n",
 530                       slot + gs_array_offset, stgp->input_map[slot + gs_array_offset]);
 531 #endif
 532
 533          switch (attr) {
 534          case GEOM_ATTRIB_PRIMITIVE_ID:
 535             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
 536             stgp->input_semantic_index[slot] = 0;
 537             break;
 538          case GEOM_ATTRIB_POSITION:
 539             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 540             stgp->input_semantic_index[slot] = 0;
 541             break;
 542          case GEOM_ATTRIB_COLOR0:
 543             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 544             stgp->input_semantic_index[slot] = 0;
 545             break;
 546          case GEOM_ATTRIB_COLOR1:
 547             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 548             stgp->input_semantic_index[slot] = 1;
 549             break;
 550          case GEOM_ATTRIB_FOG_FRAG_COORD:
 551             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 552             stgp->input_semantic_index[slot] = 0;
 553             break;
 554          case GEOM_ATTRIB_TEX_COORD:
 555             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 556             stgp->input_semantic_index[slot] = num_generic++;
 557             break;
 558          case GEOM_ATTRIB_VAR0:
 559             /* fall-through */
 560          default:
 561             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 562             stgp->input_semantic_index[slot] = num_generic++;
 563          }
 564       }
 565    }
 566
 567    /* initialize output semantics to defaults */
 568    for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
 569       gs_output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
 570       gs_output_semantic_index[i] = 0;
 571    }
 572
 573    num_generic = 0;
 574    /*
 575     * Determine number of outputs, the (default) output register
 576     * mapping and the semantic information for each output.
 577     */
 578    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 579       if (stgp->Base.Base.OutputsWritten & (1 << attr)) {
 580          GLuint slot;
 581
 582          slot = gs_num_outputs;
 583          gs_num_outputs++;
 584          outputMapping[attr] = slot;
 585
 586          switch (attr) {
 587          case GEOM_RESULT_POS:
 588             assert(slot == 0);
 589             gs_output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 590             gs_output_semantic_index[slot] = 0;
 591             break;
 592          case GEOM_RESULT_COL0:
 593             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 594             gs_output_semantic_index[slot] = 0;
 595             break;
 596          case GEOM_RESULT_COL1:
 597             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 598             gs_output_semantic_index[slot] = 1;
 599             break;
 600          case GEOM_RESULT_SCOL0:
 601             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 602             gs_output_semantic_index[slot] = 0;
 603             break;
 604          case GEOM_RESULT_SCOL1:
 605             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 606             gs_output_semantic_index[slot] = 1;
 607             break;
 608          case GEOM_RESULT_FOGC:
 609             gs_output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 610             gs_output_semantic_index[slot] = 0;
 611             break;
 612          case GEOM_RESULT_PSIZ:
 613             gs_output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 614             gs_output_semantic_index[slot] = 0;
 615             break;
 616          case GEOM_RESULT_TEX0:
 617          case GEOM_RESULT_TEX1:
 618          case GEOM_RESULT_TEX2:
 619          case GEOM_RESULT_TEX3:
 620          case GEOM_RESULT_TEX4:
 621          case GEOM_RESULT_TEX5:
 622          case GEOM_RESULT_TEX6:
 623          case GEOM_RESULT_TEX7:
 624             /* fall-through */
 625          case GEOM_RESULT_VAR0:
 626             /* fall-through */
 627          default:
 628             assert(slot < Elements(gs_output_semantic_name));
 629             /* use default semantic info */
 630             gs_output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 631             gs_output_semantic_index[slot] = num_generic++;
 632          }
 633       }
 634    }
 635
 636    assert(gs_output_semantic_name[0] == TGSI_SEMANTIC_POSITION);
 637
 638    /* find max output slot referenced to compute gs_num_outputs */
 639    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 640       if (outputMapping[attr] != ~0 && outputMapping[attr] > maxSlot)
 641          maxSlot = outputMapping[attr];
 642    }
 643    gs_num_outputs = maxSlot + 1;
 644
 645 #if 0 /* debug */
 646    {
 647       GLuint i;
 648       printf("outputMapping? %d\n", outputMapping ? 1 : 0);
 649       if (outputMapping) {
 650          printf("attr -> slot\n");
 651          for (i = 0; i < 16;  i++) {
 652             printf(" %2d       %3d\n", i, outputMapping[i]);
 653          }
 654       }
 655       printf("slot    sem_name  sem_index\n");
 656       for (i = 0; i < gs_num_outputs; i++) {
 657          printf(" %2d         %d         %d\n",
 658                 i,
 659                 gs_output_semantic_name[i],
 660                 gs_output_semantic_index[i]);
 661       }
 662    }
 663 #endif
 664
 665    /* free old shader state, if any */
 666    if (stgp->tgsi.tokens) {
 667       st_free_tokens(stgp->tgsi.tokens);
 668       stgp->tgsi.tokens = NULL;
 669    }
 670    if (stgp->driver_shader) {
 671       cso_delete_geometry_shader(st->cso_context, stgp->driver_shader);
 672       stgp->driver_shader = NULL;
 673    }
 674
 675    ureg_property_gs_input_prim(ureg, stgp->Base.InputType);
 676    ureg_property_gs_output_prim(ureg, stgp->Base.OutputType);
 677    ureg_property_gs_max_vertices(ureg, stgp->Base.VerticesOut);
 678
 679    error  = st_translate_mesa_program(st->ctx,
 680                                       TGSI_PROCESSOR_GEOMETRY,
 681                                       ureg,
 682                                       &stgp->Base.Base,
 683                                       /* inputs */
 684                                       gs_num_inputs,
 685                                       inputMapping,
 686                                       stgp->input_semantic_name,
 687                                       stgp->input_semantic_index,
 688                                       NULL,
 689                                       /* outputs */
 690                                       gs_num_outputs,
 691                                       outputMapping,
 692                                       gs_output_semantic_name,
 693                                       gs_output_semantic_index,
 694                                       FALSE);
 695
 696
 697    stgp->num_inputs = gs_num_inputs;
 698    stgp->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 699    ureg_destroy( ureg );
 700    stgp->driver_shader = pipe->create_gs_state(pipe, &stgp->tgsi);
 701
 702    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
 703       _mesa_print_program(&stgp->Base.Base);
 704       debug_printf("\n");
 705    }
 706
 707    if (ST_DEBUG & DEBUG_TGSI) {
 708       tgsi_dump(stgp->tgsi.tokens, 0);
 709       debug_printf("\n");
 710    }
 711 }
 712
 713 /**
 714  * Debug- print current shader text
 715  */
 716 void
 717 st_print_shaders(GLcontext *ctx)
 718 {
 719    struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 720    if (shProg) {
 721       GLuint i;
 722       for (i = 0; i < shProg->NumShaders; i++) {
 723          printf("GLSL shader %u of %u:\n", i, shProg->NumShaders);
 724          printf("%s\n", shProg->Shaders[i]->Source);
 725       }
 726    }
 727 }