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             /* In most cases, there is nothing special about these
 342              * inputs, so adopt a convention to use the generic
 343              * semantic name and the mesa FRAG_ATTRIB_ number as the
 344              * index.
 345              *
 346              * All that is required is that the vertex shader labels
 347              * its own outputs similarly, and that the vertex shader
 348              * generates at least every output required by the
 349              * fragment shader plus fixed-function hardware (such as
 350              * BFC).
 351              *
 352              * There is no requirement that semantic indexes start at
 353              * zero or be restricted to a particular range -- nobody
 354              * should be building tables based on semantic index.
 355              */
 356          case FRAG_ATTRIB_PNTC:
 357          case FRAG_ATTRIB_TEX0:
 358          case FRAG_ATTRIB_TEX1:
 359          case FRAG_ATTRIB_TEX2:
 360          case FRAG_ATTRIB_TEX3:
 361          case FRAG_ATTRIB_TEX4:
 362          case FRAG_ATTRIB_TEX5:
 363          case FRAG_ATTRIB_TEX6:
 364          case FRAG_ATTRIB_TEX7:
 365          case FRAG_ATTRIB_VAR0:
 366          default:
 367             /* Actually, let's try and zero-base this just for
 368              * readability of the generated TGSI.
 369              */
 370             assert(attr >= FRAG_ATTRIB_TEX0);
 371             input_semantic_index[slot] = (attr - FRAG_ATTRIB_TEX0);
 372             input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 373             if (attr == FRAG_ATTRIB_PNTC)
 374                interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 375             else
 376                interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 377             break;
 378          }
 379       }
 380       else {
 381          inputMapping[attr] = -1;
 382       }
 383    }
 384
 385    /*
 386     * Semantics and mapping for outputs
 387     */
 388    {
 389       uint numColors = 0;
 390       GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;
 391
 392       /* if z is written, emit that first */
 393       if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
 394          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
 395          fs_output_semantic_index[fs_num_outputs] = 0;
 396          outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
 397          fs_num_outputs++;
 398          outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
 399       }
 400
 401       if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_STENCIL)) {
 402          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_STENCIL;
 403          fs_output_semantic_index[fs_num_outputs] = 0;
 404          outputMapping[FRAG_RESULT_STENCIL] = fs_num_outputs;
 405          fs_num_outputs++;
 406          outputsWritten &= ~(1 << FRAG_RESULT_STENCIL);
 407       }
 408
 409       /* handle remaning outputs (color) */
 410       for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
 411          if (outputsWritten & BITFIELD64_BIT(attr)) {
 412             switch (attr) {
 413             case FRAG_RESULT_DEPTH:
 414             case FRAG_RESULT_STENCIL:
 415                /* handled above */
 416                assert(0);
 417                break;
 418             default:
 419                assert(attr == FRAG_RESULT_COLOR ||
 420                       (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
 421                fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
 422                fs_output_semantic_index[fs_num_outputs] = numColors;
 423                outputMapping[attr] = fs_num_outputs;
 424                numColors++;
 425                break;
 426             }
 427
 428             fs_num_outputs++;
 429          }
 430       }
 431    }
 432
 433    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 434    if (ureg == NULL)
 435       return;
 436
 437    if (ST_DEBUG & DEBUG_MESA) {
 438       _mesa_print_program(&stfp->Base.Base);
 439       _mesa_print_program_parameters(st->ctx, &stfp->Base.Base);
 440       debug_printf("\n");
 441    }
 442
 443    error =
 444       st_translate_mesa_program(st->ctx,
 445                                 TGSI_PROCESSOR_FRAGMENT,
 446                                 ureg,
 447                                 &stfp->Base.Base,
 448                                 /* inputs */
 449                                 fs_num_inputs,
 450                                 inputMapping,
 451                                 input_semantic_name,
 452                                 input_semantic_index,
 453                                 interpMode,
 454                                 /* outputs */
 455                                 fs_num_outputs,
 456                                 outputMapping,
 457                                 fs_output_semantic_name,
 458                                 fs_output_semantic_index, FALSE );
 459
 460    stfp->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 461    ureg_destroy( ureg );
 462    stfp->driver_shader = pipe->create_fs_state(pipe, &stfp->tgsi);
 463
 464    if (ST_DEBUG & DEBUG_TGSI) {
 465       tgsi_dump( stfp->tgsi.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
 466       debug_printf("\n");
 467    }
 468 }
 469
 470 void
 471 st_translate_geometry_program(struct st_context *st,
 472                               struct st_geometry_program *stgp)
 473 {
 474    GLuint inputMapping[GEOM_ATTRIB_MAX];
 475    GLuint outputMapping[GEOM_RESULT_MAX];
 476    struct pipe_context *pipe = st->pipe;
 477    enum pipe_error error;
 478    GLuint attr;
 479    const GLbitfield inputsRead = stgp->Base.Base.InputsRead;
 480    GLuint vslot = 0;
 481    GLuint num_generic = 0;
 482
 483    uint gs_num_inputs = 0;
 484    uint gs_builtin_inputs = 0;
 485    uint gs_array_offset = 0;
 486
 487    ubyte gs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 488    ubyte gs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 489    uint gs_num_outputs = 0;
 490
 491    GLint i;
 492    GLuint maxSlot = 0;
 493    struct ureg_program *ureg;
 494
 495    _mesa_remove_output_reads(&stgp->Base.Base, PROGRAM_OUTPUT);
 496    _mesa_remove_output_reads(&stgp->Base.Base, PROGRAM_VARYING);
 497
 498    ureg = ureg_create( TGSI_PROCESSOR_GEOMETRY );
 499    if (ureg == NULL) {
 500       return;
 501    }
 502
 503    /* which vertex output goes to the first geometry input */
 504    vslot = 0;
 505
 506    memset(inputMapping, 0, sizeof(inputMapping));
 507    memset(outputMapping, 0, sizeof(outputMapping));
 508
 509    /*
 510     * Convert Mesa program inputs to TGSI input register semantics.
 511     */
 512    for (attr = 0; attr < GEOM_ATTRIB_MAX; attr++) {
 513       if (inputsRead & (1 << attr)) {
 514          const GLuint slot = gs_num_inputs;
 515
 516          gs_num_inputs++;
 517
 518          inputMapping[attr] = slot;
 519
 520          stgp->input_map[slot + gs_array_offset] = vslot - gs_builtin_inputs;
 521          stgp->input_to_index[attr] = vslot;
 522          stgp->index_to_input[vslot] = attr;
 523          ++vslot;
 524
 525          if (attr != GEOM_ATTRIB_PRIMITIVE_ID) {
 526             gs_array_offset += 2;
 527          } else
 528             ++gs_builtin_inputs;
 529
 530 #if 1
 531          debug_printf("input map at %d = %d\n",
 532                       slot + gs_array_offset, stgp->input_map[slot + gs_array_offset]);
 533 #endif
 534
 535          switch (attr) {
 536          case GEOM_ATTRIB_PRIMITIVE_ID:
 537             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
 538             stgp->input_semantic_index[slot] = 0;
 539             break;
 540          case GEOM_ATTRIB_POSITION:
 541             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 542             stgp->input_semantic_index[slot] = 0;
 543             break;
 544          case GEOM_ATTRIB_COLOR0:
 545             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 546             stgp->input_semantic_index[slot] = 0;
 547             break;
 548          case GEOM_ATTRIB_COLOR1:
 549             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 550             stgp->input_semantic_index[slot] = 1;
 551             break;
 552          case GEOM_ATTRIB_FOG_FRAG_COORD:
 553             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 554             stgp->input_semantic_index[slot] = 0;
 555             break;
 556          case GEOM_ATTRIB_TEX_COORD:
 557             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 558             stgp->input_semantic_index[slot] = num_generic++;
 559             break;
 560          case GEOM_ATTRIB_VAR0:
 561             /* fall-through */
 562          default:
 563             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 564             stgp->input_semantic_index[slot] = num_generic++;
 565          }
 566       }
 567    }
 568
 569    /* initialize output semantics to defaults */
 570    for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
 571       gs_output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
 572       gs_output_semantic_index[i] = 0;
 573    }
 574
 575    num_generic = 0;
 576    /*
 577     * Determine number of outputs, the (default) output register
 578     * mapping and the semantic information for each output.
 579     */
 580    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 581       if (stgp->Base.Base.OutputsWritten & (1 << attr)) {
 582          GLuint slot;
 583
 584          slot = gs_num_outputs;
 585          gs_num_outputs++;
 586          outputMapping[attr] = slot;
 587
 588          switch (attr) {
 589          case GEOM_RESULT_POS:
 590             assert(slot == 0);
 591             gs_output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 592             gs_output_semantic_index[slot] = 0;
 593             break;
 594          case GEOM_RESULT_COL0:
 595             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 596             gs_output_semantic_index[slot] = 0;
 597             break;
 598          case GEOM_RESULT_COL1:
 599             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 600             gs_output_semantic_index[slot] = 1;
 601             break;
 602          case GEOM_RESULT_SCOL0:
 603             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 604             gs_output_semantic_index[slot] = 0;
 605             break;
 606          case GEOM_RESULT_SCOL1:
 607             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 608             gs_output_semantic_index[slot] = 1;
 609             break;
 610          case GEOM_RESULT_FOGC:
 611             gs_output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 612             gs_output_semantic_index[slot] = 0;
 613             break;
 614          case GEOM_RESULT_PSIZ:
 615             gs_output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 616             gs_output_semantic_index[slot] = 0;
 617             break;
 618          case GEOM_RESULT_TEX0:
 619          case GEOM_RESULT_TEX1:
 620          case GEOM_RESULT_TEX2:
 621          case GEOM_RESULT_TEX3:
 622          case GEOM_RESULT_TEX4:
 623          case GEOM_RESULT_TEX5:
 624          case GEOM_RESULT_TEX6:
 625          case GEOM_RESULT_TEX7:
 626             /* fall-through */
 627          case GEOM_RESULT_VAR0:
 628             /* fall-through */
 629          default:
 630             assert(slot < Elements(gs_output_semantic_name));
 631             /* use default semantic info */
 632             gs_output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 633             gs_output_semantic_index[slot] = num_generic++;
 634          }
 635       }
 636    }
 637
 638    assert(gs_output_semantic_name[0] == TGSI_SEMANTIC_POSITION);
 639
 640    /* find max output slot referenced to compute gs_num_outputs */
 641    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 642       if (outputMapping[attr] != ~0 && outputMapping[attr] > maxSlot)
 643          maxSlot = outputMapping[attr];
 644    }
 645    gs_num_outputs = maxSlot + 1;
 646
 647 #if 0 /* debug */
 648    {
 649       GLuint i;
 650       printf("outputMapping? %d\n", outputMapping ? 1 : 0);
 651       if (outputMapping) {
 652          printf("attr -> slot\n");
 653          for (i = 0; i < 16;  i++) {
 654             printf(" %2d       %3d\n", i, outputMapping[i]);
 655          }
 656       }
 657       printf("slot    sem_name  sem_index\n");
 658       for (i = 0; i < gs_num_outputs; i++) {
 659          printf(" %2d         %d         %d\n",
 660                 i,
 661                 gs_output_semantic_name[i],
 662                 gs_output_semantic_index[i]);
 663       }
 664    }
 665 #endif
 666
 667    /* free old shader state, if any */
 668    if (stgp->tgsi.tokens) {
 669       st_free_tokens(stgp->tgsi.tokens);
 670       stgp->tgsi.tokens = NULL;
 671    }
 672    if (stgp->driver_shader) {
 673       cso_delete_geometry_shader(st->cso_context, stgp->driver_shader);
 674       stgp->driver_shader = NULL;
 675    }
 676
 677    ureg_property_gs_input_prim(ureg, stgp->Base.InputType);
 678    ureg_property_gs_output_prim(ureg, stgp->Base.OutputType);
 679    ureg_property_gs_max_vertices(ureg, stgp->Base.VerticesOut);
 680
 681    error  = st_translate_mesa_program(st->ctx,
 682                                       TGSI_PROCESSOR_GEOMETRY,
 683                                       ureg,
 684                                       &stgp->Base.Base,
 685                                       /* inputs */
 686                                       gs_num_inputs,
 687                                       inputMapping,
 688                                       stgp->input_semantic_name,
 689                                       stgp->input_semantic_index,
 690                                       NULL,
 691                                       /* outputs */
 692                                       gs_num_outputs,
 693                                       outputMapping,
 694                                       gs_output_semantic_name,
 695                                       gs_output_semantic_index,
 696                                       FALSE);
 697
 698
 699    stgp->num_inputs = gs_num_inputs;
 700    stgp->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 701    ureg_destroy( ureg );
 702    stgp->driver_shader = pipe->create_gs_state(pipe, &stgp->tgsi);
 703
 704    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
 705       _mesa_print_program(&stgp->Base.Base);
 706       debug_printf("\n");
 707    }
 708
 709    if (ST_DEBUG & DEBUG_TGSI) {
 710       tgsi_dump(stgp->tgsi.tokens, 0);
 711       debug_printf("\n");
 712    }
 713 }
 714
 715 /**
 716  * Debug- print current shader text
 717  */
 718 void
 719 st_print_shaders(struct gl_context *ctx)
 720 {
 721    struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 722    if (shProg) {
 723       GLuint i;
 724       for (i = 0; i < shProg->NumShaders; i++) {
 725          printf("GLSL shader %u of %u:\n", i, shProg->NumShaders);
 726          printf("%s\n", shProg->Shaders[i]->Source);
 727       }
 728    }
 729 }