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/hash.h"
  36 #include "main/mfeatures.h"
  37 #include "main/mtypes.h"
  38 #include "program/prog_parameter.h"
  39 #include "program/prog_print.h"
  40 #include "program/programopt.h"
  41
  42 #include "pipe/p_context.h"
  43 #include "pipe/p_defines.h"
  44 #include "pipe/p_shader_tokens.h"
  45 #include "draw/draw_context.h"
  46 #include "tgsi/tgsi_dump.h"
  47 #include "tgsi/tgsi_ureg.h"
  48
  49 #include "st_debug.h"
  50 #include "st_cb_bitmap.h"
  51 #include "st_cb_drawpixels.h"
  52 #include "st_context.h"
  53 #include "st_program.h"
  54 #include "st_mesa_to_tgsi.h"
  55 #include "cso_cache/cso_context.h"
  56
  57
  58
  59 /**
  60  * Delete a vertex program variant.  Note the caller must unlink
  61  * the variant from the linked list.
  62  */
  63 static void
  64 delete_vp_variant(struct st_context *st, struct st_vp_variant *vpv)
  65 {
  66    if (vpv->driver_shader)
  67       cso_delete_vertex_shader(st->cso_context, vpv->driver_shader);
  68
  69    if (vpv->draw_shader)
  70       draw_delete_vertex_shader( st->draw, vpv->draw_shader );
  71
  72    if (vpv->tgsi.tokens)
  73       st_free_tokens(vpv->tgsi.tokens);
  74
  75    free( vpv );
  76 }
  77
  78
  79
  80 /**
  81  * Clean out any old compilations:
  82  */
  83 void
  84 st_release_vp_variants( struct st_context *st,
  85                         struct st_vertex_program *stvp )
  86 {
  87    struct st_vp_variant *vpv;
  88
  89    for (vpv = stvp->variants; vpv; ) {
  90       struct st_vp_variant *next = vpv->next;
  91       delete_vp_variant(st, vpv);
  92       vpv = next;
  93    }
  94
  95    stvp->variants = NULL;
  96 }
  97
  98
  99
 100 /**
 101  * Delete a fragment program variant.  Note the caller must unlink
 102  * the variant from the linked list.
 103  */
 104 static void
 105 delete_fp_variant(struct st_context *st, struct st_fp_variant *fpv)
 106 {
 107    if (fpv->driver_shader)
 108       cso_delete_fragment_shader(st->cso_context, fpv->driver_shader);
 109    if (fpv->parameters)
 110       _mesa_free_parameter_list(fpv->parameters);
 111    if (fpv->tgsi.tokens)
 112       st_free_tokens(fpv->tgsi.tokens);
 113    free(fpv);
 114 }
 115
 116
 117 /**
 118  * Free all variants of a fragment program.
 119  */
 120 void
 121 st_release_fp_variants(struct st_context *st, struct st_fragment_program *stfp)
 122 {
 123    struct st_fp_variant *fpv;
 124
 125    for (fpv = stfp->variants; fpv; ) {
 126       struct st_fp_variant *next = fpv->next;
 127       delete_fp_variant(st, fpv);
 128       fpv = next;
 129    }
 130
 131    stfp->variants = NULL;
 132 }
 133
 134
 135 /**
 136  * Delete a geometry program variant.  Note the caller must unlink
 137  * the variant from the linked list.
 138  */
 139 static void
 140 delete_gp_variant(struct st_context *st, struct st_gp_variant *gpv)
 141 {
 142    if (gpv->driver_shader)
 143       cso_delete_geometry_shader(st->cso_context, gpv->driver_shader);
 144
 145    free(gpv);
 146 }
 147
 148
 149 /**
 150  * Free all variants of a geometry program.
 151  */
 152 void
 153 st_release_gp_variants(struct st_context *st, struct st_geometry_program *stgp)
 154 {
 155    struct st_gp_variant *gpv;
 156
 157    for (gpv = stgp->variants; gpv; ) {
 158       struct st_gp_variant *next = gpv->next;
 159       delete_gp_variant(st, gpv);
 160       gpv = next;
 161    }
 162
 163    stgp->variants = NULL;
 164 }
 165
 166
 167
 168
 169 /**
 170  * Translate a Mesa vertex shader into a TGSI shader.
 171  * \param outputMapping  to map vertex program output registers (VARYING_SLOT_x)
 172  *       to TGSI output slots
 173  * \param tokensOut  destination for TGSI tokens
 174  * \return  pointer to cached pipe_shader object.
 175  */
 176 void
 177 st_prepare_vertex_program(struct gl_context *ctx,
 178                             struct st_vertex_program *stvp)
 179 {
 180    GLuint attr;
 181
 182    stvp->num_inputs = 0;
 183    stvp->num_outputs = 0;
 184
 185    if (stvp->Base.IsPositionInvariant)
 186       _mesa_insert_mvp_code(ctx, &stvp->Base);
 187
 188    if (!stvp->glsl_to_tgsi)
 189       assert(stvp->Base.Base.NumInstructions > 1);
 190
 191    /*
 192     * Determine number of inputs, the mappings between VERT_ATTRIB_x
 193     * and TGSI generic input indexes, plus input attrib semantic info.
 194     */
 195    for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 196       if ((stvp->Base.Base.InputsRead & BITFIELD64_BIT(attr)) != 0) {
 197          stvp->input_to_index[attr] = stvp->num_inputs;
 198          stvp->index_to_input[stvp->num_inputs] = attr;
 199          stvp->num_inputs++;
 200       }
 201    }
 202    /* bit of a hack, presetup potentially unused edgeflag input */
 203    stvp->input_to_index[VERT_ATTRIB_EDGEFLAG] = stvp->num_inputs;
 204    stvp->index_to_input[stvp->num_inputs] = VERT_ATTRIB_EDGEFLAG;
 205
 206    /* Compute mapping of vertex program outputs to slots.
 207     */
 208    for (attr = 0; attr < VARYING_SLOT_MAX; attr++) {
 209       if ((stvp->Base.Base.OutputsWritten & BITFIELD64_BIT(attr)) == 0) {
 210          stvp->result_to_output[attr] = ~0;
 211       }
 212       else {
 213          unsigned slot = stvp->num_outputs++;
 214
 215          stvp->result_to_output[attr] = slot;
 216
 217          switch (attr) {
 218          case VARYING_SLOT_POS:
 219             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 220             stvp->output_semantic_index[slot] = 0;
 221             break;
 222          case VARYING_SLOT_COL0:
 223             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 224             stvp->output_semantic_index[slot] = 0;
 225             break;
 226          case VARYING_SLOT_COL1:
 227             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 228             stvp->output_semantic_index[slot] = 1;
 229             break;
 230          case VARYING_SLOT_BFC0:
 231             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 232             stvp->output_semantic_index[slot] = 0;
 233             break;
 234          case VARYING_SLOT_BFC1:
 235             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 236             stvp->output_semantic_index[slot] = 1;
 237             break;
 238          case VARYING_SLOT_FOGC:
 239             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 240             stvp->output_semantic_index[slot] = 0;
 241             break;
 242          case VARYING_SLOT_PSIZ:
 243             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 244             stvp->output_semantic_index[slot] = 0;
 245             break;
 246          case VARYING_SLOT_CLIP_DIST0:
 247             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
 248             stvp->output_semantic_index[slot] = 0;
 249             break;
 250          case VARYING_SLOT_CLIP_DIST1:
 251             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
 252             stvp->output_semantic_index[slot] = 1;
 253             break;
 254          case VARYING_SLOT_EDGE:
 255             assert(0);
 256             break;
 257          case VARYING_SLOT_CLIP_VERTEX:
 258             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPVERTEX;
 259             stvp->output_semantic_index[slot] = 0;
 260             break;
 261
 262          case VARYING_SLOT_TEX0:
 263          case VARYING_SLOT_TEX1:
 264          case VARYING_SLOT_TEX2:
 265          case VARYING_SLOT_TEX3:
 266          case VARYING_SLOT_TEX4:
 267          case VARYING_SLOT_TEX5:
 268          case VARYING_SLOT_TEX6:
 269          case VARYING_SLOT_TEX7:
 270             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 271             stvp->output_semantic_index[slot] = attr - VARYING_SLOT_TEX0;
 272             break;
 273
 274          case VARYING_SLOT_VAR0:
 275          default:
 276             assert(attr < VARYING_SLOT_MAX);
 277             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 278             stvp->output_semantic_index[slot] = (FRAG_ATTRIB_VAR0 -
 279                                                 FRAG_ATTRIB_TEX0 +
 280                                                 attr -
 281                                                 VARYING_SLOT_VAR0);
 282             break;
 283          }
 284       }
 285    }
 286    /* similar hack to above, presetup potentially unused edgeflag output */
 287    stvp->result_to_output[VARYING_SLOT_EDGE] = stvp->num_outputs;
 288    stvp->output_semantic_name[stvp->num_outputs] = TGSI_SEMANTIC_EDGEFLAG;
 289    stvp->output_semantic_index[stvp->num_outputs] = 0;
 290 }
 291
 292
 293 /**
 294  * Translate a vertex program to create a new variant.
 295  */
 296 static struct st_vp_variant *
 297 st_translate_vertex_program(struct st_context *st,
 298                             struct st_vertex_program *stvp,
 299                             const struct st_vp_variant_key *key)
 300 {
 301    struct st_vp_variant *vpv = CALLOC_STRUCT(st_vp_variant);
 302    struct pipe_context *pipe = st->pipe;
 303    struct ureg_program *ureg;
 304    enum pipe_error error;
 305    unsigned num_outputs;
 306
 307    st_prepare_vertex_program(st->ctx, stvp);
 308
 309    if (!stvp->glsl_to_tgsi)
 310    {
 311       _mesa_remove_output_reads(&stvp->Base.Base, PROGRAM_OUTPUT);
 312    }
 313
 314    ureg = ureg_create( TGSI_PROCESSOR_VERTEX );
 315    if (ureg == NULL) {
 316       free(vpv);
 317       return NULL;
 318    }
 319
 320    vpv->key = *key;
 321
 322    vpv->num_inputs = stvp->num_inputs;
 323    num_outputs = stvp->num_outputs;
 324    if (key->passthrough_edgeflags) {
 325       vpv->num_inputs++;
 326       num_outputs++;
 327    }
 328
 329    if (ST_DEBUG & DEBUG_MESA) {
 330       _mesa_print_program(&stvp->Base.Base);
 331       _mesa_print_program_parameters(st->ctx, &stvp->Base.Base);
 332       debug_printf("\n");
 333    }
 334
 335    if (stvp->glsl_to_tgsi)
 336       error = st_translate_program(st->ctx,
 337                                    TGSI_PROCESSOR_VERTEX,
 338                                    ureg,
 339                                    stvp->glsl_to_tgsi,
 340                                    &stvp->Base.Base,
 341                                    /* inputs */
 342                                    stvp->num_inputs,
 343                                    stvp->input_to_index,
 344                                    NULL, /* input semantic name */
 345                                    NULL, /* input semantic index */
 346                                    NULL, /* interp mode */
 347                                    NULL, /* is centroid */
 348                                    /* outputs */
 349                                    stvp->num_outputs,
 350                                    stvp->result_to_output,
 351                                    stvp->output_semantic_name,
 352                                    stvp->output_semantic_index,
 353                                    key->passthrough_edgeflags,
 354                                    key->clamp_color);
 355    else
 356       error = st_translate_mesa_program(st->ctx,
 357                                         TGSI_PROCESSOR_VERTEX,
 358                                         ureg,
 359                                         &stvp->Base.Base,
 360                                         /* inputs */
 361                                         vpv->num_inputs,
 362                                         stvp->input_to_index,
 363                                         NULL, /* input semantic name */
 364                                         NULL, /* input semantic index */
 365                                         NULL,
 366                                         /* outputs */
 367                                         num_outputs,
 368                                         stvp->result_to_output,
 369                                         stvp->output_semantic_name,
 370                                         stvp->output_semantic_index,
 371                                         key->passthrough_edgeflags,
 372                                         key->clamp_color);
 373
 374    if (error)
 375       goto fail;
 376
 377    vpv->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 378    if (!vpv->tgsi.tokens)
 379       goto fail;
 380
 381    ureg_destroy( ureg );
 382
 383    if (stvp->glsl_to_tgsi) {
 384       st_translate_stream_output_info(stvp->glsl_to_tgsi,
 385                                       stvp->result_to_output,
 386                                       &vpv->tgsi.stream_output);
 387    }
 388
 389    vpv->driver_shader = pipe->create_vs_state(pipe, &vpv->tgsi);
 390
 391    if (ST_DEBUG & DEBUG_TGSI) {
 392       tgsi_dump( vpv->tgsi.tokens, 0 );
 393       debug_printf("\n");
 394    }
 395
 396    return vpv;
 397
 398 fail:
 399    debug_printf("%s: failed to translate Mesa program:\n", __FUNCTION__);
 400    _mesa_print_program(&stvp->Base.Base);
 401    debug_assert(0);
 402
 403    ureg_destroy( ureg );
 404    return NULL;
 405 }
 406
 407
 408 /**
 409  * Find/create a vertex program variant.
 410  */
 411 struct st_vp_variant *
 412 st_get_vp_variant(struct st_context *st,
 413                   struct st_vertex_program *stvp,
 414                   const struct st_vp_variant_key *key)
 415 {
 416    struct st_vp_variant *vpv;
 417
 418    /* Search for existing variant */
 419    for (vpv = stvp->variants; vpv; vpv = vpv->next) {
 420       if (memcmp(&vpv->key, key, sizeof(*key)) == 0) {
 421          break;
 422       }
 423    }
 424
 425    if (!vpv) {
 426       /* create now */
 427       vpv = st_translate_vertex_program(st, stvp, key);
 428       if (vpv) {
 429          /* insert into list */
 430          vpv->next = stvp->variants;
 431          stvp->variants = vpv;
 432       }
 433    }
 434
 435    return vpv;
 436 }
 437
 438
 439 static unsigned
 440 st_translate_interp(enum glsl_interp_qualifier glsl_qual, bool is_color)
 441 {
 442    switch (glsl_qual) {
 443    case INTERP_QUALIFIER_NONE:
 444       if (is_color)
 445          return TGSI_INTERPOLATE_COLOR;
 446       return TGSI_INTERPOLATE_PERSPECTIVE;
 447    case INTERP_QUALIFIER_SMOOTH:
 448       return TGSI_INTERPOLATE_PERSPECTIVE;
 449    case INTERP_QUALIFIER_FLAT:
 450       return TGSI_INTERPOLATE_CONSTANT;
 451    case INTERP_QUALIFIER_NOPERSPECTIVE:
 452       return TGSI_INTERPOLATE_LINEAR;
 453    default:
 454       assert(0 && "unexpected interp mode in st_translate_interp()");
 455       return TGSI_INTERPOLATE_PERSPECTIVE;
 456    }
 457 }
 458
 459
 460 /**
 461  * Translate a Mesa fragment shader into a TGSI shader using extra info in
 462  * the key.
 463  * \return  new fragment program variant
 464  */
 465 static struct st_fp_variant *
 466 st_translate_fragment_program(struct st_context *st,
 467                               struct st_fragment_program *stfp,
 468                               const struct st_fp_variant_key *key)
 469 {
 470    struct pipe_context *pipe = st->pipe;
 471    struct st_fp_variant *variant = CALLOC_STRUCT(st_fp_variant);
 472    GLboolean deleteFP = GL_FALSE;
 473
 474    GLuint outputMapping[FRAG_RESULT_MAX];
 475    GLuint inputMapping[FRAG_ATTRIB_MAX];
 476    GLuint interpMode[PIPE_MAX_SHADER_INPUTS];  /* XXX size? */
 477    GLuint attr;
 478    GLbitfield64 inputsRead;
 479    struct ureg_program *ureg;
 480
 481    GLboolean write_all = GL_FALSE;
 482
 483    ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
 484    ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
 485    GLboolean is_centroid[PIPE_MAX_SHADER_INPUTS];
 486    uint fs_num_inputs = 0;
 487
 488    ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 489    ubyte fs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 490    uint fs_num_outputs = 0;
 491
 492    if (!variant)
 493       return NULL;
 494
 495    assert(!(key->bitmap && key->drawpixels));
 496
 497    if (key->bitmap) {
 498       /* glBitmap drawing */
 499       struct gl_fragment_program *fp; /* we free this temp program below */
 500
 501       st_make_bitmap_fragment_program(st, &stfp->Base,
 502                                       &fp, &variant->bitmap_sampler);
 503
 504       variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
 505       stfp = st_fragment_program(fp);
 506       deleteFP = GL_TRUE;
 507    }
 508    else if (key->drawpixels) {
 509       /* glDrawPixels drawing */
 510       struct gl_fragment_program *fp; /* we free this temp program below */
 511
 512       if (key->drawpixels_z || key->drawpixels_stencil) {
 513          fp = st_make_drawpix_z_stencil_program(st, key->drawpixels_z,
 514                                                 key->drawpixels_stencil);
 515       }
 516       else {
 517          /* RGBA */
 518          st_make_drawpix_fragment_program(st, &stfp->Base, &fp);
 519          variant->parameters = _mesa_clone_parameter_list(fp->Base.Parameters);
 520          deleteFP = GL_TRUE;
 521       }
 522       stfp = st_fragment_program(fp);
 523    }
 524
 525    if (!stfp->glsl_to_tgsi)
 526       _mesa_remove_output_reads(&stfp->Base.Base, PROGRAM_OUTPUT);
 527
 528    /*
 529     * Convert Mesa program inputs to TGSI input register semantics.
 530     */
 531    inputsRead = stfp->Base.Base.InputsRead;
 532    for (attr = 0; attr < FRAG_ATTRIB_MAX; attr++) {
 533       if ((inputsRead & BITFIELD64_BIT(attr)) != 0) {
 534          const GLuint slot = fs_num_inputs++;
 535
 536          inputMapping[attr] = slot;
 537          is_centroid[slot] = (stfp->Base.IsCentroid & BITFIELD64_BIT(attr)) != 0;
 538
 539          switch (attr) {
 540          case FRAG_ATTRIB_WPOS:
 541             input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 542             input_semantic_index[slot] = 0;
 543             interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 544             break;
 545          case FRAG_ATTRIB_COL0:
 546             input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 547             input_semantic_index[slot] = 0;
 548             interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
 549                                                    TRUE);
 550             break;
 551          case FRAG_ATTRIB_COL1:
 552             input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 553             input_semantic_index[slot] = 1;
 554             interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
 555                                                    TRUE);
 556             break;
 557          case FRAG_ATTRIB_FOGC:
 558             input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 559             input_semantic_index[slot] = 0;
 560             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 561             break;
 562          case FRAG_ATTRIB_FACE:
 563             input_semantic_name[slot] = TGSI_SEMANTIC_FACE;
 564             input_semantic_index[slot] = 0;
 565             interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
 566             break;
 567          case FRAG_ATTRIB_CLIP_DIST0:
 568             input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
 569             input_semantic_index[slot] = 0;
 570             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 571             break;
 572          case FRAG_ATTRIB_CLIP_DIST1:
 573             input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
 574             input_semantic_index[slot] = 1;
 575             interpMode[slot] = TGSI_INTERPOLATE_PERSPECTIVE;
 576             break;
 577             /* In most cases, there is nothing special about these
 578              * inputs, so adopt a convention to use the generic
 579              * semantic name and the mesa FRAG_ATTRIB_ number as the
 580              * index.
 581              *
 582              * All that is required is that the vertex shader labels
 583              * its own outputs similarly, and that the vertex shader
 584              * generates at least every output required by the
 585              * fragment shader plus fixed-function hardware (such as
 586              * BFC).
 587              *
 588              * There is no requirement that semantic indexes start at
 589              * zero or be restricted to a particular range -- nobody
 590              * should be building tables based on semantic index.
 591              */
 592          case FRAG_ATTRIB_PNTC:
 593          case FRAG_ATTRIB_TEX0:
 594          case FRAG_ATTRIB_TEX1:
 595          case FRAG_ATTRIB_TEX2:
 596          case FRAG_ATTRIB_TEX3:
 597          case FRAG_ATTRIB_TEX4:
 598          case FRAG_ATTRIB_TEX5:
 599          case FRAG_ATTRIB_TEX6:
 600          case FRAG_ATTRIB_TEX7:
 601          case FRAG_ATTRIB_VAR0:
 602          default:
 603             /* Actually, let's try and zero-base this just for
 604              * readability of the generated TGSI.
 605              */
 606             assert(attr >= FRAG_ATTRIB_TEX0);
 607             input_semantic_index[slot] = (attr - FRAG_ATTRIB_TEX0);
 608             input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 609             if (attr == FRAG_ATTRIB_PNTC)
 610                interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
 611             else
 612                interpMode[slot] = st_translate_interp(stfp->Base.InterpQualifier[attr],
 613                                                       FALSE);
 614             break;
 615          }
 616       }
 617       else {
 618          inputMapping[attr] = -1;
 619       }
 620    }
 621
 622    /*
 623     * Semantics and mapping for outputs
 624     */
 625    {
 626       uint numColors = 0;
 627       GLbitfield64 outputsWritten = stfp->Base.Base.OutputsWritten;
 628
 629       /* if z is written, emit that first */
 630       if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
 631          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_POSITION;
 632          fs_output_semantic_index[fs_num_outputs] = 0;
 633          outputMapping[FRAG_RESULT_DEPTH] = fs_num_outputs;
 634          fs_num_outputs++;
 635          outputsWritten &= ~(1 << FRAG_RESULT_DEPTH);
 636       }
 637
 638       if (outputsWritten & BITFIELD64_BIT(FRAG_RESULT_STENCIL)) {
 639          fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_STENCIL;
 640          fs_output_semantic_index[fs_num_outputs] = 0;
 641          outputMapping[FRAG_RESULT_STENCIL] = fs_num_outputs;
 642          fs_num_outputs++;
 643          outputsWritten &= ~(1 << FRAG_RESULT_STENCIL);
 644       }
 645
 646       /* handle remaining outputs (color) */
 647       for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
 648          if (outputsWritten & BITFIELD64_BIT(attr)) {
 649             switch (attr) {
 650             case FRAG_RESULT_DEPTH:
 651             case FRAG_RESULT_STENCIL:
 652                /* handled above */
 653                assert(0);
 654                break;
 655             case FRAG_RESULT_COLOR:
 656                write_all = GL_TRUE; /* fallthrough */
 657             default:
 658                assert(attr == FRAG_RESULT_COLOR ||
 659                       (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
 660                fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
 661                fs_output_semantic_index[fs_num_outputs] = numColors;
 662                outputMapping[attr] = fs_num_outputs;
 663                numColors++;
 664                break;
 665             }
 666
 667             fs_num_outputs++;
 668          }
 669       }
 670    }
 671
 672    ureg = ureg_create( TGSI_PROCESSOR_FRAGMENT );
 673    if (ureg == NULL) {
 674       free(variant);
 675       return NULL;
 676    }
 677
 678    if (ST_DEBUG & DEBUG_MESA) {
 679       _mesa_print_program(&stfp->Base.Base);
 680       _mesa_print_program_parameters(st->ctx, &stfp->Base.Base);
 681       debug_printf("\n");
 682    }
 683    if (write_all == GL_TRUE)
 684       ureg_property_fs_color0_writes_all_cbufs(ureg, 1);
 685
 686    if (stfp->Base.FragDepthLayout != FRAG_DEPTH_LAYOUT_NONE) {
 687       switch (stfp->Base.FragDepthLayout) {
 688       case FRAG_DEPTH_LAYOUT_ANY:
 689          ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_ANY);
 690          break;
 691       case FRAG_DEPTH_LAYOUT_GREATER:
 692          ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_GREATER);
 693          break;
 694       case FRAG_DEPTH_LAYOUT_LESS:
 695          ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_LESS);
 696          break;
 697       case FRAG_DEPTH_LAYOUT_UNCHANGED:
 698          ureg_property_fs_depth_layout(ureg, TGSI_FS_DEPTH_LAYOUT_UNCHANGED);
 699          break;
 700       default:
 701          assert(0);
 702       }
 703    }
 704
 705    if (stfp->glsl_to_tgsi)
 706       st_translate_program(st->ctx,
 707                            TGSI_PROCESSOR_FRAGMENT,
 708                            ureg,
 709                            stfp->glsl_to_tgsi,
 710                            &stfp->Base.Base,
 711                            /* inputs */
 712                            fs_num_inputs,
 713                            inputMapping,
 714                            input_semantic_name,
 715                            input_semantic_index,
 716                            interpMode,
 717                            is_centroid,
 718                            /* outputs */
 719                            fs_num_outputs,
 720                            outputMapping,
 721                            fs_output_semantic_name,
 722                            fs_output_semantic_index, FALSE,
 723                            key->clamp_color );
 724    else
 725       st_translate_mesa_program(st->ctx,
 726                                 TGSI_PROCESSOR_FRAGMENT,
 727                                 ureg,
 728                                 &stfp->Base.Base,
 729                                 /* inputs */
 730                                 fs_num_inputs,
 731                                 inputMapping,
 732                                 input_semantic_name,
 733                                 input_semantic_index,
 734                                 interpMode,
 735                                 /* outputs */
 736                                 fs_num_outputs,
 737                                 outputMapping,
 738                                 fs_output_semantic_name,
 739                                 fs_output_semantic_index, FALSE,
 740                                 key->clamp_color);
 741
 742    variant->tgsi.tokens = ureg_get_tokens( ureg, NULL );
 743    ureg_destroy( ureg );
 744
 745    /* fill in variant */
 746    variant->driver_shader = pipe->create_fs_state(pipe, &variant->tgsi);
 747    variant->key = *key;
 748
 749    if (ST_DEBUG & DEBUG_TGSI) {
 750       tgsi_dump( variant->tgsi.tokens, 0/*TGSI_DUMP_VERBOSE*/ );
 751       debug_printf("\n");
 752    }
 753
 754    if (deleteFP) {
 755       /* Free the temporary program made above */
 756       struct gl_fragment_program *fp = &stfp->Base;
 757       _mesa_reference_fragprog(st->ctx, &fp, NULL);
 758    }
 759
 760    return variant;
 761 }
 762
 763
 764 /**
 765  * Translate fragment program if needed.
 766  */
 767 struct st_fp_variant *
 768 st_get_fp_variant(struct st_context *st,
 769                   struct st_fragment_program *stfp,
 770                   const struct st_fp_variant_key *key)
 771 {
 772    struct st_fp_variant *fpv;
 773
 774    /* Search for existing variant */
 775    for (fpv = stfp->variants; fpv; fpv = fpv->next) {
 776       if (memcmp(&fpv->key, key, sizeof(*key)) == 0) {
 777          break;
 778       }
 779    }
 780
 781    if (!fpv) {
 782       /* create new */
 783       fpv = st_translate_fragment_program(st, stfp, key);
 784       if (fpv) {
 785          /* insert into list */
 786          fpv->next = stfp->variants;
 787          stfp->variants = fpv;
 788       }
 789    }
 790
 791    return fpv;
 792 }
 793
 794
 795 /**
 796  * Translate a geometry program to create a new variant.
 797  */
 798 static struct st_gp_variant *
 799 st_translate_geometry_program(struct st_context *st,
 800                               struct st_geometry_program *stgp,
 801                               const struct st_gp_variant_key *key)
 802 {
 803    GLuint inputMapping[GEOM_ATTRIB_MAX];
 804    GLuint outputMapping[GEOM_RESULT_MAX];
 805    struct pipe_context *pipe = st->pipe;
 806    GLuint attr;
 807    GLbitfield64 inputsRead;
 808    GLuint vslot = 0;
 809    GLuint num_generic = 0;
 810
 811    uint gs_num_inputs = 0;
 812    uint gs_builtin_inputs = 0;
 813    uint gs_array_offset = 0;
 814
 815    ubyte gs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
 816    ubyte gs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
 817    uint gs_num_outputs = 0;
 818
 819    GLint i;
 820    GLuint maxSlot = 0;
 821    struct ureg_program *ureg;
 822
 823    struct st_gp_variant *gpv;
 824
 825    gpv = CALLOC_STRUCT(st_gp_variant);
 826    if (!gpv)
 827       return NULL;
 828
 829    _mesa_remove_output_reads(&stgp->Base.Base, PROGRAM_OUTPUT);
 830
 831    ureg = ureg_create( TGSI_PROCESSOR_GEOMETRY );
 832    if (ureg == NULL) {
 833       free(gpv);
 834       return NULL;
 835    }
 836
 837    /* which vertex output goes to the first geometry input */
 838    vslot = 0;
 839
 840    memset(inputMapping, 0, sizeof(inputMapping));
 841    memset(outputMapping, 0, sizeof(outputMapping));
 842
 843    /*
 844     * Convert Mesa program inputs to TGSI input register semantics.
 845     */
 846    inputsRead = stgp->Base.Base.InputsRead;
 847    for (attr = 0; attr < GEOM_ATTRIB_MAX; attr++) {
 848       if ((inputsRead & BITFIELD64_BIT(attr)) != 0) {
 849          const GLuint slot = gs_num_inputs;
 850
 851          gs_num_inputs++;
 852
 853          inputMapping[attr] = slot;
 854
 855          stgp->input_map[slot + gs_array_offset] = vslot - gs_builtin_inputs;
 856          stgp->input_to_index[attr] = vslot;
 857          stgp->index_to_input[vslot] = attr;
 858          ++vslot;
 859
 860          if (attr != GEOM_ATTRIB_PRIMITIVE_ID) {
 861             gs_array_offset += 2;
 862          } else
 863             ++gs_builtin_inputs;
 864
 865 #if 0
 866          debug_printf("input map at %d = %d\n",
 867                       slot + gs_array_offset, stgp->input_map[slot + gs_array_offset]);
 868 #endif
 869
 870          switch (attr) {
 871          case GEOM_ATTRIB_PRIMITIVE_ID:
 872             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
 873             stgp->input_semantic_index[slot] = 0;
 874             break;
 875          case GEOM_ATTRIB_POSITION:
 876             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 877             stgp->input_semantic_index[slot] = 0;
 878             break;
 879          case GEOM_ATTRIB_COLOR0:
 880             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 881             stgp->input_semantic_index[slot] = 0;
 882             break;
 883          case GEOM_ATTRIB_COLOR1:
 884             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 885             stgp->input_semantic_index[slot] = 1;
 886             break;
 887          case GEOM_ATTRIB_FOG_FRAG_COORD:
 888             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 889             stgp->input_semantic_index[slot] = 0;
 890             break;
 891          case GEOM_ATTRIB_TEX_COORD:
 892             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 893             stgp->input_semantic_index[slot] = num_generic++;
 894             break;
 895          case GEOM_ATTRIB_VAR0:
 896             /* fall-through */
 897          default:
 898             stgp->input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 899             stgp->input_semantic_index[slot] = num_generic++;
 900          }
 901       }
 902    }
 903
 904    /* initialize output semantics to defaults */
 905    for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
 906       gs_output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
 907       gs_output_semantic_index[i] = 0;
 908    }
 909
 910    num_generic = 0;
 911    /*
 912     * Determine number of outputs, the (default) output register
 913     * mapping and the semantic information for each output.
 914     */
 915    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 916       if (stgp->Base.Base.OutputsWritten & BITFIELD64_BIT(attr)) {
 917          GLuint slot;
 918
 919          slot = gs_num_outputs;
 920          gs_num_outputs++;
 921          outputMapping[attr] = slot;
 922
 923          switch (attr) {
 924          case GEOM_RESULT_POS:
 925             assert(slot == 0);
 926             gs_output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
 927             gs_output_semantic_index[slot] = 0;
 928             break;
 929          case GEOM_RESULT_COL0:
 930             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 931             gs_output_semantic_index[slot] = 0;
 932             break;
 933          case GEOM_RESULT_COL1:
 934             gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
 935             gs_output_semantic_index[slot] = 1;
 936             break;
 937          case GEOM_RESULT_SCOL0:
 938             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 939             gs_output_semantic_index[slot] = 0;
 940             break;
 941          case GEOM_RESULT_SCOL1:
 942             gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
 943             gs_output_semantic_index[slot] = 1;
 944             break;
 945          case GEOM_RESULT_FOGC:
 946             gs_output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
 947             gs_output_semantic_index[slot] = 0;
 948             break;
 949          case GEOM_RESULT_PSIZ:
 950             gs_output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
 951             gs_output_semantic_index[slot] = 0;
 952             break;
 953          case GEOM_RESULT_TEX0:
 954          case GEOM_RESULT_TEX1:
 955          case GEOM_RESULT_TEX2:
 956          case GEOM_RESULT_TEX3:
 957          case GEOM_RESULT_TEX4:
 958          case GEOM_RESULT_TEX5:
 959          case GEOM_RESULT_TEX6:
 960          case GEOM_RESULT_TEX7:
 961             /* fall-through */
 962          case GEOM_RESULT_VAR0:
 963             /* fall-through */
 964          default:
 965             assert(slot < Elements(gs_output_semantic_name));
 966             /* use default semantic info */
 967             gs_output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
 968             gs_output_semantic_index[slot] = num_generic++;
 969          }
 970       }
 971    }
 972
 973    assert(gs_output_semantic_name[0] == TGSI_SEMANTIC_POSITION);
 974
 975    /* find max output slot referenced to compute gs_num_outputs */
 976    for (attr = 0; attr < GEOM_RESULT_MAX; attr++) {
 977       if (outputMapping[attr] != ~0 && outputMapping[attr] > maxSlot)
 978          maxSlot = outputMapping[attr];
 979    }
 980    gs_num_outputs = maxSlot + 1;
 981
 982 #if 0 /* debug */
 983    {
 984       GLuint i;
 985       printf("outputMapping? %d\n", outputMapping ? 1 : 0);
 986       if (outputMapping) {
 987          printf("attr -> slot\n");
 988          for (i = 0; i < 16;  i++) {
 989             printf(" %2d       %3d\n", i, outputMapping[i]);
 990          }
 991       }
 992       printf("slot    sem_name  sem_index\n");
 993       for (i = 0; i < gs_num_outputs; i++) {
 994          printf(" %2d         %d         %d\n",
 995                 i,
 996                 gs_output_semantic_name[i],
 997                 gs_output_semantic_index[i]);
 998       }
 999    }
1000 #endif
1001
1002    /* free old shader state, if any */
1003    if (stgp->tgsi.tokens) {
1004       st_free_tokens(stgp->tgsi.tokens);
1005       stgp->tgsi.tokens = NULL;
1006    }
1007
1008    ureg_property_gs_input_prim(ureg, stgp->Base.InputType);
1009    ureg_property_gs_output_prim(ureg, stgp->Base.OutputType);
1010    ureg_property_gs_max_vertices(ureg, stgp->Base.VerticesOut);
1011
1012    st_translate_mesa_program(st->ctx,
1013                              TGSI_PROCESSOR_GEOMETRY,
1014                              ureg,
1015                              &stgp->Base.Base,
1016                              /* inputs */
1017                              gs_num_inputs,
1018                              inputMapping,
1019                              stgp->input_semantic_name,
1020                              stgp->input_semantic_index,
1021                              NULL,
1022                              /* outputs */
1023                              gs_num_outputs,
1024                              outputMapping,
1025                              gs_output_semantic_name,
1026                              gs_output_semantic_index,
1027                              FALSE,
1028                              FALSE);
1029
1030    stgp->num_inputs = gs_num_inputs;
1031    stgp->tgsi.tokens = ureg_get_tokens( ureg, NULL );
1032    ureg_destroy( ureg );
1033
1034    if (stgp->glsl_to_tgsi) {
1035       st_translate_stream_output_info(stgp->glsl_to_tgsi,
1036                                       outputMapping,
1037                                       &stgp->tgsi.stream_output);
1038    }
1039
1040    /* fill in new variant */
1041    gpv->driver_shader = pipe->create_gs_state(pipe, &stgp->tgsi);
1042    gpv->key = *key;
1043
1044    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
1045       _mesa_print_program(&stgp->Base.Base);
1046       debug_printf("\n");
1047    }
1048
1049    if (ST_DEBUG & DEBUG_TGSI) {
1050       tgsi_dump(stgp->tgsi.tokens, 0);
1051       debug_printf("\n");
1052    }
1053
1054    return gpv;
1055 }
1056
1057
1058 /**
1059  * Get/create geometry program variant.
1060  */
1061 struct st_gp_variant *
1062 st_get_gp_variant(struct st_context *st,
1063                   struct st_geometry_program *stgp,
1064                   const struct st_gp_variant_key *key)
1065 {
1066    struct st_gp_variant *gpv;
1067
1068    /* Search for existing variant */
1069    for (gpv = stgp->variants; gpv; gpv = gpv->next) {
1070       if (memcmp(&gpv->key, key, sizeof(*key)) == 0) {
1071          break;
1072       }
1073    }
1074
1075    if (!gpv) {
1076       /* create new */
1077       gpv = st_translate_geometry_program(st, stgp, key);
1078       if (gpv) {
1079          /* insert into list */
1080          gpv->next = stgp->variants;
1081          stgp->variants = gpv;
1082       }
1083    }
1084
1085    return gpv;
1086 }
1087
1088
1089
1090
1091 /**
1092  * Debug- print current shader text
1093  */
1094 void
1095 st_print_shaders(struct gl_context *ctx)
1096 {
1097    struct gl_shader_program *shProg[3] = {
1098       ctx->Shader.CurrentVertexProgram,
1099       ctx->Shader.CurrentGeometryProgram,
1100       ctx->Shader.CurrentFragmentProgram,
1101    };
1102    unsigned j;
1103
1104    for (j = 0; j < 3; j++) {
1105       unsigned i;
1106
1107       if (shProg[j] == NULL)
1108          continue;
1109
1110       for (i = 0; i < shProg[j]->NumShaders; i++) {
1111          struct gl_shader *sh;
1112
1113          switch (shProg[j]->Shaders[i]->Type) {
1114          case GL_VERTEX_SHADER:
1115             sh = (i != 0) ? NULL : shProg[j]->Shaders[i];
1116             break;
1117          case GL_GEOMETRY_SHADER_ARB:
1118             sh = (i != 1) ? NULL : shProg[j]->Shaders[i];
1119             break;
1120          case GL_FRAGMENT_SHADER:
1121             sh = (i != 2) ? NULL : shProg[j]->Shaders[i];
1122             break;
1123          default:
1124             assert(0);
1125             sh = NULL;
1126             break;
1127          }
1128
1129          if (sh != NULL) {
1130             printf("GLSL shader %u of %u:\n", i, shProg[j]->NumShaders);
1131             printf("%s\n", sh->Source);
1132          }
1133       }
1134    }
1135 }
1136
1137
1138 /**
1139  * Vert/Geom/Frag programs have per-context variants.  Free all the
1140  * variants attached to the given program which match the given context.
1141  */
1142 static void
1143 destroy_program_variants(struct st_context *st, struct gl_program *program)
1144 {
1145    if (!program || program == &_mesa_DummyProgram)
1146       return;
1147
1148    switch (program->Target) {
1149    case GL_VERTEX_PROGRAM_ARB:
1150       {
1151          struct st_vertex_program *stvp = (struct st_vertex_program *) program;
1152          struct st_vp_variant *vpv, **prevPtr = &stvp->variants;
1153
1154          for (vpv = stvp->variants; vpv; ) {
1155             struct st_vp_variant *next = vpv->next;
1156             if (vpv->key.st == st) {
1157                /* unlink from list */
1158                *prevPtr = next;
1159                /* destroy this variant */
1160                delete_vp_variant(st, vpv);
1161             }
1162             else {
1163                prevPtr = &vpv->next;
1164             }
1165             vpv = next;
1166          }
1167       }
1168       break;
1169    case GL_FRAGMENT_PROGRAM_ARB:
1170       {
1171          struct st_fragment_program *stfp =
1172             (struct st_fragment_program *) program;
1173          struct st_fp_variant *fpv, **prevPtr = &stfp->variants;
1174
1175          for (fpv = stfp->variants; fpv; ) {
1176             struct st_fp_variant *next = fpv->next;
1177             if (fpv->key.st == st) {
1178                /* unlink from list */
1179                *prevPtr = next;
1180                /* destroy this variant */
1181                delete_fp_variant(st, fpv);
1182             }
1183             else {
1184                prevPtr = &fpv->next;
1185             }
1186             fpv = next;
1187          }
1188       }
1189       break;
1190    case MESA_GEOMETRY_PROGRAM:
1191       {
1192          struct st_geometry_program *stgp =
1193             (struct st_geometry_program *) program;
1194          struct st_gp_variant *gpv, **prevPtr = &stgp->variants;
1195
1196          for (gpv = stgp->variants; gpv; ) {
1197             struct st_gp_variant *next = gpv->next;
1198             if (gpv->key.st == st) {
1199                /* unlink from list */
1200                *prevPtr = next;
1201                /* destroy this variant */
1202                delete_gp_variant(st, gpv);
1203             }
1204             else {
1205                prevPtr = &gpv->next;
1206             }
1207             gpv = next;
1208          }
1209       }
1210       break;
1211    default:
1212       _mesa_problem(NULL, "Unexpected program target 0x%x in "
1213                     "destroy_program_variants_cb()", program->Target);
1214    }
1215 }
1216
1217
1218 /**
1219  * Callback for _mesa_HashWalk.  Free all the shader's program variants
1220  * which match the given context.
1221  */
1222 static void
1223 destroy_shader_program_variants_cb(GLuint key, void *data, void *userData)
1224 {
1225    struct st_context *st = (struct st_context *) userData;
1226    struct gl_shader *shader = (struct gl_shader *) data;
1227
1228    switch (shader->Type) {
1229    case GL_SHADER_PROGRAM_MESA:
1230       {
1231          struct gl_shader_program *shProg = (struct gl_shader_program *) data;
1232          GLuint i;
1233
1234          for (i = 0; i < shProg->NumShaders; i++) {
1235             destroy_program_variants(st, shProg->Shaders[i]->Program);
1236          }
1237
1238          for (i = 0; i < Elements(shProg->_LinkedShaders); i++) {
1239             if (shProg->_LinkedShaders[i])
1240                destroy_program_variants(st, shProg->_LinkedShaders[i]->Program);
1241          }
1242       }
1243       break;
1244    case GL_VERTEX_SHADER:
1245    case GL_FRAGMENT_SHADER:
1246    case GL_GEOMETRY_SHADER:
1247       {
1248          destroy_program_variants(st, shader->Program);
1249       }
1250       break;
1251    default:
1252       assert(0);
1253    }
1254 }
1255
1256
1257 /**
1258  * Callback for _mesa_HashWalk.  Free all the program variants which match
1259  * the given context.
1260  */
1261 static void
1262 destroy_program_variants_cb(GLuint key, void *data, void *userData)
1263 {
1264    struct st_context *st = (struct st_context *) userData;
1265    struct gl_program *program = (struct gl_program *) data;
1266    destroy_program_variants(st, program);
1267 }
1268
1269
1270 /**
1271  * Walk over all shaders and programs to delete any variants which
1272  * belong to the given context.
1273  * This is called during context tear-down.
1274  */
1275 void
1276 st_destroy_program_variants(struct st_context *st)
1277 {
1278    /* ARB vert/frag program */
1279    _mesa_HashWalk(st->ctx->Shared->Programs,
1280                   destroy_program_variants_cb, st);
1281
1282    /* GLSL vert/frag/geom shaders */
1283    _mesa_HashWalk(st->ctx->Shared->ShaderObjects,
1284                   destroy_shader_program_variants_cb, st);
1285 }
1286
1287
1288 /**
1289  * For debugging, print/dump the current vertex program.
1290  */
1291 void
1292 st_print_current_vertex_program(void)
1293 {
1294    GET_CURRENT_CONTEXT(ctx);
1295
1296    if (ctx->VertexProgram._Current) {
1297       struct st_vertex_program *stvp =
1298          (struct st_vertex_program *) ctx->VertexProgram._Current;
1299       struct st_vp_variant *stv;
1300
1301       debug_printf("Vertex program %u\n", stvp->Base.Base.Id);
1302
1303       for (stv = stvp->variants; stv; stv = stv->next) {
1304          debug_printf("variant %p\n", stv);
1305          tgsi_dump(stv->tgsi.tokens, 0);
1306       }
1307    }
1308 }