src/gallium/auxiliary/draw/draw_tess.c

   1 /**************************************************************************
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   3  * Copyright 2020 Red Hat.
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   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
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  24  **************************************************************************/
  25 #include "draw_tess.h"
  26 #ifdef LLVM_AVAILABLE
  27 #include "draw_llvm.h"
  28 #endif
  29
  30 #include "tessellator/p_tessellator.h"
  31 #include "nir/nir_to_tgsi_info.h"
  32 #include "util/u_prim.h"
  33 #include "util/u_math.h"
  34 #include "util/u_memory.h"
  35
  36 static inline int
  37 draw_tes_get_input_index(int semantic, int index,
  38                          const struct tgsi_shader_info *input_info)
  39 {
  40    int i;
  41    const ubyte *input_semantic_names = input_info->output_semantic_name;
  42    const ubyte *input_semantic_indices = input_info->output_semantic_index;
  43    for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
  44       if (input_semantic_names[i] == semantic &&
  45           input_semantic_indices[i] == index)
  46          return i;
  47    }
  48    return -1;
  49 }
  50
  51 #ifdef LLVM_AVAILABLE
  52 #define DEBUG_INPUTS 0
  53 static void
  54 llvm_fetch_tcs_input(struct draw_tess_ctrl_shader *shader,
  55                      const struct draw_prim_info *input_prim_info,
  56                      unsigned prim_id,
  57                      unsigned num_vertices)
  58 {
  59    const float (*input_ptr)[4];
  60    float (*input_data)[32][NUM_TCS_INPUTS][TGSI_NUM_CHANNELS] = &shader->tcs_input->data;
  61    unsigned slot, i;
  62    int vs_slot;
  63    unsigned input_vertex_stride = shader->input_vertex_stride;
  64
  65    input_ptr = shader->input;
  66    for (i = 0; i < num_vertices; i++) {
  67       const float (*input)[4];
  68       int vertex_idx = prim_id * num_vertices + i;
  69       if (input_prim_info->linear == FALSE)
  70          vertex_idx = input_prim_info->elts[vertex_idx];
  71 #if DEBUG_INPUTS
  72       debug_printf("%d) tcs vertex index = %d (prim idx = %d)\n",
  73                    i, prim_id, 0);
  74 #endif
  75       input = (const float (*)[4])((const char *)input_ptr + (vertex_idx * input_vertex_stride));
  76       for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
  77          vs_slot = draw_tes_get_input_index(
  78                                             shader->info.input_semantic_name[slot],
  79                                             shader->info.input_semantic_index[slot],
  80                                             shader->input_info);
  81          if (vs_slot < 0) {
  82             debug_printf("VS/TCS signature mismatch!\n");
  83             (*input_data)[i][slot][0] = 0;
  84             (*input_data)[i][slot][1] = 0;
  85             (*input_data)[i][slot][2] = 0;
  86             (*input_data)[i][slot][3] = 0;
  87          } else {
  88             (*input_data)[i][slot][0] = input[vs_slot][0];
  89             (*input_data)[i][slot][1] = input[vs_slot][1];
  90             (*input_data)[i][slot][2] = input[vs_slot][2];
  91             (*input_data)[i][slot][3] = input[vs_slot][3];
  92 #if DEBUG_INPUTS
  93             debug_printf("\t\t%p = %f %f %f %f\n", &(*input_data)[i][slot][0],
  94                          (*input_data)[i][slot][0],
  95                          (*input_data)[i][slot][1],
  96                          (*input_data)[i][slot][2],
  97                          (*input_data)[i][slot][3]);
  98 #endif
  99             ++vs_slot;
 100          }
 101       }
 102    }
 103 }
 104
 105 #define DEBUG_OUTPUTS 0
 106 static void
 107 llvm_store_tcs_output(struct draw_tess_ctrl_shader *shader,
 108                       unsigned prim_id,
 109                       struct draw_vertex_info *output_verts,
 110                       unsigned vert_start)
 111 {
 112    float (*output_ptr)[4];
 113    float (*output_data)[32][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS] = &shader->tcs_output->data;
 114    unsigned slot, i;
 115    unsigned num_vertices = shader->vertices_out;
 116
 117    char *output = (char *)output_verts->verts->data;
 118    output += vert_start * output_verts->stride;
 119
 120    for (i = 0; i < num_vertices; i++) {
 121
 122 #if DEBUG_OUTPUTS
 123       debug_printf("%d) tcs store vertex index = %d (prim idx = %d)\n",
 124                    i, prim_id, 0);
 125 #endif
 126       output_ptr = (float(*)[4])(output + (i * output_verts->stride));
 127
 128       for (slot = 0; slot < shader->info.num_outputs; ++slot) {
 129          output_ptr[slot][0] = (*output_data)[i][slot][0];
 130          output_ptr[slot][1] = (*output_data)[i][slot][1];
 131          output_ptr[slot][2] = (*output_data)[i][slot][2];
 132          output_ptr[slot][3] = (*output_data)[i][slot][3];
 133 #if DEBUG_OUTPUTS
 134          debug_printf("\t\t%p = %f %f %f %f\n",
 135                       &output_ptr[slot][0],
 136                       output_ptr[slot][0],
 137                       output_ptr[slot][1],
 138                       output_ptr[slot][2],
 139                       output_ptr[slot][3]);
 140 #endif
 141       }
 142    }
 143 }
 144
 145 static void
 146 llvm_tcs_run(struct draw_tess_ctrl_shader *shader, uint32_t prim_id)
 147 {
 148    shader->current_variant->jit_func(shader->jit_context, shader->tcs_input->data, shader->tcs_output->data, prim_id,
 149       shader->draw->pt.vertices_per_patch);
 150 }
 151 #endif
 152
 153 /**
 154  * Execute tess ctrl shader.
 155  */
 156 int draw_tess_ctrl_shader_run(struct draw_tess_ctrl_shader *shader,
 157                               const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 158                               const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
 159                               const struct draw_vertex_info *input_verts,
 160                               const struct draw_prim_info *input_prim,
 161                               const struct tgsi_shader_info *input_info,
 162                               struct draw_vertex_info *output_verts,
 163                               struct draw_prim_info *output_prims )
 164 {
 165    const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
 166    unsigned num_outputs = draw_total_tcs_outputs(shader->draw);
 167    unsigned input_stride = input_verts->vertex_size;
 168    unsigned vertex_size = sizeof(struct vertex_header) + num_outputs * 4 * sizeof(float);
 169    unsigned num_patches = input_prim->count / shader->draw->pt.vertices_per_patch;
 170
 171    output_verts->vertex_size = vertex_size;
 172    output_verts->stride = output_verts->vertex_size;
 173    output_verts->verts = NULL;
 174    output_verts->count = 0;
 175    shader->input = input;
 176    shader->input_vertex_stride = input_stride;
 177    shader->input_info = input_info;
 178
 179    output_prims->linear = TRUE;
 180    output_prims->start = 0;
 181    output_prims->elts = NULL;
 182    output_prims->count = 0;
 183    output_prims->prim = PIPE_PRIM_PATCHES;
 184    output_prims->flags = 0;
 185    output_prims->primitive_lengths = NULL;
 186    output_prims->primitive_count = 0;
 187
 188 #ifdef LLVM_AVAILABLE
 189    for (unsigned i = 0; i < num_patches; i++) {
 190       uint32_t vert_start = output_verts->count;
 191
 192       output_verts->count += shader->vertices_out;
 193
 194       llvm_fetch_tcs_input(shader, input_prim, i, shader->draw->pt.vertices_per_patch);
 195
 196       llvm_tcs_run(shader, i);
 197
 198       uint32_t old_verts = util_align_npot(vert_start, 16);
 199       uint32_t new_verts = util_align_npot(output_verts->count, 16);
 200       uint32_t old_size = output_verts->vertex_size * old_verts;
 201       uint32_t new_size = output_verts->vertex_size * new_verts;
 202       output_verts->verts = REALLOC(output_verts->verts, old_size, new_size);
 203
 204       llvm_store_tcs_output(shader, i, output_verts, vert_start);
 205    }
 206 #endif
 207
 208    output_prims->primitive_count = num_patches;
 209    return 0;
 210 }
 211
 212 #ifdef LLVM_AVAILABLE
 213 #define DEBUG_INPUTS 0
 214 static void
 215 llvm_fetch_tes_input(struct draw_tess_eval_shader *shader,
 216                      const struct draw_prim_info *input_prim_info,
 217                      unsigned prim_id,
 218                      unsigned num_vertices)
 219 {
 220    const float (*input_ptr)[4];
 221    float (*input_data)[32][PIPE_MAX_SHADER_INPUTS][TGSI_NUM_CHANNELS] = &shader->tes_input->data;
 222    unsigned slot, i;
 223    int vs_slot;
 224    unsigned input_vertex_stride = shader->input_vertex_stride;
 225
 226    input_ptr = shader->input;
 227    for (i = 0; i < num_vertices; i++) {
 228       const float (*input)[4];
 229       int vertex_idx = prim_id * num_vertices + i;
 230
 231       if (input_prim_info->linear == FALSE)
 232          vertex_idx = input_prim_info->elts[vertex_idx];
 233 #if DEBUG_INPUTS
 234       debug_printf("%d) tes vertex index = %d (prim idx = %d)\n",
 235                    i, prim_id, 0);
 236 #endif
 237       input = (const float (*)[4])((const char *)input_ptr + (vertex_idx * input_vertex_stride));
 238       for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
 239          vs_slot = draw_tes_get_input_index(
 240                                             shader->info.input_semantic_name[slot],
 241                                             shader->info.input_semantic_index[slot],
 242                                             shader->input_info);
 243          if (vs_slot < 0) {
 244             debug_printf("TCS/TES signature mismatch!\n");
 245             (*input_data)[i][slot][0] = 0;
 246             (*input_data)[i][slot][1] = 0;
 247             (*input_data)[i][slot][2] = 0;
 248             (*input_data)[i][slot][3] = 0;
 249          } else {
 250             (*input_data)[i][slot][0] = input[vs_slot][0];
 251             (*input_data)[i][slot][1] = input[vs_slot][1];
 252             (*input_data)[i][slot][2] = input[vs_slot][2];
 253             (*input_data)[i][slot][3] = input[vs_slot][3];
 254 #if DEBUG_INPUTS
 255             debug_printf("\t\t%p = %f %f %f %f\n",
 256                          &input[vs_slot][0],
 257                          (*input_data)[i][slot][0],
 258                          (*input_data)[i][slot][1],
 259                          (*input_data)[i][slot][2],
 260                          (*input_data)[i][slot][3]);
 261 #endif
 262             ++vs_slot;
 263          }
 264       }
 265    }
 266 }
 267
 268 static void
 269 llvm_fetch_tess_factors(struct draw_tess_eval_shader *shader,
 270                         unsigned patch_id,
 271                         unsigned num_vertices,
 272                         struct pipe_tessellation_factors *factors)
 273 {
 274    int outer_slot = draw_tes_get_input_index(
 275       TGSI_SEMANTIC_TESSOUTER, 0, shader->input_info);
 276    int inner_slot = draw_tes_get_input_index(
 277       TGSI_SEMANTIC_TESSINNER, 0, shader->input_info);
 278    const float (*input_ptr)[4];
 279    const float (*input)[4];
 280    input_ptr = shader->input;
 281    input = (const float (*)[4])((const char *)input_ptr + ((patch_id * num_vertices) * shader->input_vertex_stride));
 282
 283    if (outer_slot != -1) {
 284       for (unsigned i = 0; i < 4; i++)
 285          factors->outer_tf[i] = input[outer_slot][i];
 286    } else {
 287       for (unsigned i = 0; i < 4; i++)
 288          factors->outer_tf[i] = shader->draw->default_outer_tess_level[i];
 289    }
 290    if (inner_slot != -1) {
 291       for (unsigned i = 0; i < 2; i++)
 292          factors->inner_tf[i] = input[inner_slot][i];
 293    } else {
 294       for (unsigned i = 0; i < 2; i++)
 295          factors->inner_tf[i] = shader->draw->default_inner_tess_level[i];
 296    }
 297 }
 298
 299 static void
 300 llvm_tes_run(struct draw_tess_eval_shader *shader,
 301              uint32_t prim_id,
 302              struct pipe_tessellator_data *tess_data,
 303              struct pipe_tessellation_factors *tess_factors,
 304              struct vertex_header *output)
 305 {
 306    shader->current_variant->jit_func(shader->jit_context, shader->tes_input->data, output, prim_id,
 307                                      tess_data->num_domain_points, tess_data->domain_points_u, tess_data->domain_points_v,
 308                                      tess_factors->outer_tf, tess_factors->inner_tf);
 309 }
 310 #endif
 311
 312 /**
 313  * Execute tess eval shader.
 314  */
 315 int draw_tess_eval_shader_run(struct draw_tess_eval_shader *shader,
 316                               const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 317                               const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS],
 318                               unsigned num_input_vertices_per_patch,
 319                               const struct draw_vertex_info *input_verts,
 320                               const struct draw_prim_info *input_prim,
 321                               const struct tgsi_shader_info *input_info,
 322                               struct draw_vertex_info *output_verts,
 323                               struct draw_prim_info *output_prims,
 324                               ushort **elts_out)
 325 {
 326    const float (*input)[4] = (const float (*)[4])input_verts->verts->data;
 327    unsigned num_outputs = draw_total_tes_outputs(shader->draw);
 328    unsigned input_stride = input_verts->vertex_size;
 329    unsigned vertex_size = sizeof(struct vertex_header) + num_outputs * 4 * sizeof(float);
 330    ushort *elts = NULL;
 331    output_verts->vertex_size = vertex_size;
 332    output_verts->stride = output_verts->vertex_size;
 333    output_verts->count = 0;
 334    output_verts->verts = NULL;
 335
 336    output_prims->linear = FALSE;
 337    output_prims->start = 0;
 338    output_prims->elts = NULL;
 339    output_prims->count = 0;
 340    output_prims->prim = get_tes_output_prim(shader);
 341    output_prims->flags = 0;
 342    output_prims->primitive_lengths = NULL;
 343    output_prims->primitive_count = 0;
 344
 345    shader->input = input;
 346    shader->input_vertex_stride = input_stride;
 347    shader->input_info = input_info;
 348
 349 #ifdef LLVM_AVAILABLE
 350    struct pipe_tessellation_factors factors;
 351    struct pipe_tessellator_data data = { 0 };
 352    struct pipe_tessellator *ptess = p_tess_init(shader->prim_mode,
 353                                                 shader->spacing,
 354                                                 !shader->vertex_order_cw,
 355                                                 shader->point_mode);
 356    for (unsigned i = 0; i < input_prim->primitive_count; i++) {
 357       uint32_t vert_start = output_verts->count;
 358       uint32_t prim_start = output_prims->primitive_count;
 359       uint32_t elt_start = output_prims->count;
 360
 361       llvm_fetch_tess_factors(shader, i, num_input_vertices_per_patch, &factors);
 362
 363       /* tessellate with the factors for this primitive */
 364       p_tessellate(ptess, &factors, &data);
 365
 366       if (data.num_domain_points == 0)
 367          continue;
 368
 369       uint32_t old_verts = vert_start;
 370       uint32_t new_verts = vert_start + util_align_npot(data.num_domain_points, 4);
 371       uint32_t old_size = output_verts->vertex_size * old_verts;
 372       uint32_t new_size = output_verts->vertex_size * new_verts;
 373       output_verts->verts = REALLOC(output_verts->verts, old_size, new_size);
 374
 375       output_verts->count += data.num_domain_points;
 376
 377       output_prims->count += data.num_indices;
 378       elts = REALLOC(elts, elt_start * sizeof(uint16_t),
 379                      output_prims->count * sizeof(uint16_t));
 380
 381       for (unsigned i = 0; i < data.num_indices; i++)
 382          elts[elt_start + i] = vert_start + data.indices[i];
 383
 384       llvm_fetch_tes_input(shader, input_prim, i, num_input_vertices_per_patch);
 385       /* run once per primitive? */
 386       char *output = (char *)output_verts->verts;
 387       output += vert_start * vertex_size;
 388       llvm_tes_run(shader, i, &data, &factors, (struct vertex_header *)output);
 389
 390       uint32_t prim_len = u_prim_vertex_count(output_prims->prim)->min;
 391       output_prims->primitive_count += data.num_indices / prim_len;
 392       output_prims->primitive_lengths = REALLOC(output_prims->primitive_lengths, prim_start * sizeof(uint32_t),
 393                                                 output_prims->primitive_count * sizeof(uint32_t));
 394       for (unsigned i = prim_start; i < output_prims->primitive_count; i++) {
 395          output_prims->primitive_lengths[i] = prim_len;
 396       }
 397    }
 398    p_tess_destroy(ptess);
 399 #endif
 400
 401    *elts_out = elts;
 402    output_prims->elts = elts;
 403    return 0;
 404 }
 405
 406 struct draw_tess_ctrl_shader *
 407 draw_create_tess_ctrl_shader(struct draw_context *draw,
 408                              const struct pipe_shader_state *state)
 409 {
 410 #ifdef LLVM_AVAILABLE
 411    boolean use_llvm = draw->llvm != NULL;
 412    struct llvm_tess_ctrl_shader *llvm_tcs = NULL;
 413 #endif
 414    struct draw_tess_ctrl_shader *tcs;
 415
 416 #ifdef LLVM_AVAILABLE
 417    if (use_llvm) {
 418       llvm_tcs = CALLOC_STRUCT(llvm_tess_ctrl_shader);
 419
 420       if (!llvm_tcs)
 421          return NULL;
 422
 423       tcs = &llvm_tcs->base;
 424
 425       make_empty_list(&llvm_tcs->variants);
 426    } else
 427 #endif
 428    {
 429       tcs = CALLOC_STRUCT(draw_tess_ctrl_shader);
 430    }
 431
 432    if (!tcs)
 433       return NULL;
 434
 435    tcs->draw = draw;
 436    tcs->state = *state;
 437
 438    nir_tgsi_scan_shader(state->ir.nir, &tcs->info, true);
 439
 440    tcs->vector_length = 4;
 441    tcs->vertices_out = tcs->info.properties[TGSI_PROPERTY_TCS_VERTICES_OUT];
 442 #ifdef LLVM_AVAILABLE
 443    if (use_llvm) {
 444
 445       tcs->tcs_input = align_malloc(sizeof(struct draw_tcs_inputs), 16);
 446       memset(tcs->tcs_input, 0, sizeof(struct draw_tcs_inputs));
 447
 448       tcs->tcs_output = align_malloc(sizeof(struct draw_tcs_outputs), 16);
 449       memset(tcs->tcs_output, 0, sizeof(struct draw_tcs_outputs));
 450
 451       tcs->jit_context = &draw->llvm->tcs_jit_context;
 452       llvm_tcs->variant_key_size =
 453          draw_tcs_llvm_variant_key_size(
 454                                         MAX2(tcs->info.file_max[TGSI_FILE_SAMPLER]+1,
 455                                              tcs->info.file_max[TGSI_FILE_SAMPLER_VIEW]+1),
 456                                         tcs->info.file_max[TGSI_FILE_IMAGE]+1);
 457    }
 458 #endif
 459    return tcs;
 460 }
 461
 462 void draw_bind_tess_ctrl_shader(struct draw_context *draw,
 463                                 struct draw_tess_ctrl_shader *dtcs)
 464 {
 465    draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 466    if (dtcs) {
 467       draw->tcs.tess_ctrl_shader = dtcs;
 468    } else {
 469       draw->tcs.tess_ctrl_shader = NULL;
 470    }
 471 }
 472
 473 void draw_delete_tess_ctrl_shader(struct draw_context *draw,
 474                                   struct draw_tess_ctrl_shader *dtcs)
 475 {
 476    if (!dtcs)
 477       return;
 478
 479 #ifdef LLVM_AVAILABLE
 480    if (draw->llvm) {
 481       struct llvm_tess_ctrl_shader *shader = llvm_tess_ctrl_shader(dtcs);
 482
 483       struct draw_tcs_llvm_variant_list_item *li;
 484
 485       li = first_elem(&shader->variants);
 486       while(!at_end(&shader->variants, li)) {
 487          struct draw_tcs_llvm_variant_list_item *next = next_elem(li);
 488          draw_tcs_llvm_destroy_variant(li->base);
 489          li = next;
 490       }
 491
 492       assert(shader->variants_cached == 0);
 493    }
 494 #endif
 495    FREE(dtcs);
 496 }
 497
 498 #ifdef LLVM_AVAILABLE
 499 void draw_tcs_set_current_variant(struct draw_tess_ctrl_shader *shader,
 500                                   struct draw_tcs_llvm_variant *variant)
 501 {
 502    shader->current_variant = variant;
 503 }
 504 #endif
 505
 506 struct draw_tess_eval_shader *
 507 draw_create_tess_eval_shader(struct draw_context *draw,
 508                              const struct pipe_shader_state *state)
 509 {
 510 #ifdef LLVM_AVAILABLE
 511    boolean use_llvm = draw->llvm != NULL;
 512    struct llvm_tess_eval_shader *llvm_tes = NULL;
 513 #endif
 514    struct draw_tess_eval_shader *tes;
 515
 516 #ifdef LLVM_AVAILABLE
 517    if (use_llvm) {
 518       llvm_tes = CALLOC_STRUCT(llvm_tess_eval_shader);
 519
 520       if (!llvm_tes)
 521          return NULL;
 522
 523       tes = &llvm_tes->base;
 524       make_empty_list(&llvm_tes->variants);
 525    } else
 526 #endif
 527    {
 528       tes = CALLOC_STRUCT(draw_tess_eval_shader);
 529    }
 530
 531    if (!tes)
 532       return NULL;
 533
 534    tes->draw = draw;
 535    tes->state = *state;
 536
 537    nir_tgsi_scan_shader(state->ir.nir, &tes->info, true);
 538
 539    tes->prim_mode = tes->info.properties[TGSI_PROPERTY_TES_PRIM_MODE];
 540    tes->spacing = tes->info.properties[TGSI_PROPERTY_TES_SPACING];
 541    tes->vertex_order_cw = tes->info.properties[TGSI_PROPERTY_TES_VERTEX_ORDER_CW];
 542    tes->point_mode = tes->info.properties[TGSI_PROPERTY_TES_POINT_MODE];
 543
 544    tes->vector_length = 4;
 545
 546    tes->position_output = -1;
 547    for (unsigned i = 0; i < tes->info.num_outputs; i++) {
 548       if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
 549           tes->info.output_semantic_index[i] == 0)
 550          tes->position_output = i;
 551       if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX)
 552          tes->viewport_index_output = i;
 553       if (tes->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
 554          debug_assert(tes->info.output_semantic_index[i] <
 555                       PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
 556          tes->ccdistance_output[tes->info.output_semantic_index[i]] = i;
 557       }
 558    }
 559
 560 #ifdef LLVM_AVAILABLE
 561    if (use_llvm) {
 562
 563       tes->tes_input = align_malloc(sizeof(struct draw_tes_inputs), 16);
 564       memset(tes->tes_input, 0, sizeof(struct draw_tes_inputs));
 565
 566       tes->jit_context = &draw->llvm->tes_jit_context;
 567       llvm_tes->variant_key_size =
 568          draw_tes_llvm_variant_key_size(
 569                                         MAX2(tes->info.file_max[TGSI_FILE_SAMPLER]+1,
 570                                              tes->info.file_max[TGSI_FILE_SAMPLER_VIEW]+1),
 571                                         tes->info.file_max[TGSI_FILE_IMAGE]+1);
 572    }
 573 #endif
 574    return tes;
 575 }
 576
 577 void draw_bind_tess_eval_shader(struct draw_context *draw,
 578                                 struct draw_tess_eval_shader *dtes)
 579 {
 580    draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
 581    if (dtes) {
 582       draw->tes.tess_eval_shader = dtes;
 583       draw->tes.position_output = dtes->position_output;
 584    } else {
 585       draw->tes.tess_eval_shader = NULL;
 586    }
 587 }
 588
 589 void draw_delete_tess_eval_shader(struct draw_context *draw,
 590                                   struct draw_tess_eval_shader *dtes)
 591 {
 592    if (!dtes)
 593       return;
 594
 595 #ifdef LLVM_AVAILABLE
 596    if (draw->llvm) {
 597       struct llvm_tess_eval_shader *shader = llvm_tess_eval_shader(dtes);
 598       struct draw_tes_llvm_variant_list_item *li;
 599
 600       li = first_elem(&shader->variants);
 601       while(!at_end(&shader->variants, li)) {
 602          struct draw_tes_llvm_variant_list_item *next = next_elem(li);
 603          draw_tes_llvm_destroy_variant(li->base);
 604          li = next;
 605       }
 606
 607       assert(shader->variants_cached == 0);
 608       align_free(dtes->tes_input);
 609    }
 610 #endif
 611    FREE(dtes);
 612 }
 613
 614 #ifdef LLVM_AVAILABLE
 615 void draw_tes_set_current_variant(struct draw_tess_eval_shader *shader,
 616                                   struct draw_tes_llvm_variant *variant)
 617 {
 618    shader->current_variant = variant;
 619 }
 620 #endif
 621
 622 enum pipe_prim_type get_tes_output_prim(struct draw_tess_eval_shader *shader)
 623 {
 624    if (shader->point_mode)
 625       return PIPE_PRIM_POINTS;
 626    else if (shader->prim_mode == PIPE_PRIM_LINES)
 627       return PIPE_PRIM_LINES;
 628    else
 629       return PIPE_PRIM_TRIANGLES;
 630 }