src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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
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  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 VMWARE 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 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_prim.h"
  31 #include "draw/draw_context.h"
  32 #include "draw/draw_vbuf.h"
  33 #include "draw/draw_vertex.h"
  34 #include "draw/draw_prim_assembler.h"
  35 #include "draw/draw_pt.h"
  36 #include "draw/draw_vs.h"
  37 #include "draw/draw_gs.h"
  38
  39
  40 struct fetch_pipeline_middle_end {
  41    struct draw_pt_middle_end base;
  42    struct draw_context *draw;
  43
  44    struct pt_emit *emit;
  45    struct pt_so_emit *so_emit;
  46    struct pt_fetch *fetch;
  47    struct pt_post_vs *post_vs;
  48
  49    unsigned vertex_data_offset;
  50    unsigned vertex_size;
  51    unsigned input_prim;
  52    unsigned opt;
  53 };
  54
  55
  56 /**
  57  * Prepare/validate middle part of the vertex pipeline.
  58  * NOTE: if you change this function, also look at the LLVM
  59  * function llvm_middle_end_prepare() for similar changes.
  60  */
  61 static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
  62                                     unsigned prim,
  63                                     unsigned opt,
  64                                     unsigned *max_vertices )
  65 {
  66    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
  67    struct draw_context *draw = fpme->draw;
  68    struct draw_vertex_shader *vs = draw->vs.vertex_shader;
  69    struct draw_geometry_shader *gs = draw->gs.geometry_shader;
  70    unsigned i;
  71    unsigned instance_id_index = ~0;
  72
  73    const unsigned gs_out_prim = (gs ? gs->output_primitive :
  74                                  u_assembled_prim(prim));
  75    unsigned nr = MAX2(vs->info.num_inputs,
  76                       draw_total_vs_outputs(draw));
  77    unsigned point_clip = draw->rasterizer->fill_front == PIPE_POLYGON_MODE_POINT ||
  78                          gs_out_prim == PIPE_PRIM_POINTS;
  79
  80    if (gs) {
  81       nr = MAX2(nr, gs->info.num_outputs + 1);
  82    }
  83
  84    /* Scan for instanceID system value.
  85     */
  86    for (i = 0; i < vs->info.num_inputs; i++) {
  87       if (vs->info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
  88          instance_id_index = i;
  89          break;
  90       }
  91    }
  92
  93    fpme->input_prim = prim;
  94    fpme->opt = opt;
  95
  96    /* Always leave room for the vertex header whether we need it or
  97     * not.  It's hard to get rid of it in particular because of the
  98     * viewport code in draw_pt_post_vs.c.
  99     */
 100    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
 101
 102
 103    draw_pt_fetch_prepare( fpme->fetch,
 104                           vs->info.num_inputs,
 105                           fpme->vertex_size,
 106                           instance_id_index );
 107    draw_pt_post_vs_prepare( fpme->post_vs,
 108                             draw->clip_xy,
 109                             draw->clip_z,
 110                             draw->clip_user,
 111                             point_clip ? draw->guard_band_points_xy :
 112                                          draw->guard_band_xy,
 113                             draw->identity_viewport,
 114                             draw->rasterizer->clip_halfz,
 115                             (draw->vs.edgeflag_output ? TRUE : FALSE) );
 116
 117    draw_pt_so_emit_prepare( fpme->so_emit, FALSE );
 118
 119    if (!(opt & PT_PIPELINE)) {
 120       draw_pt_emit_prepare( fpme->emit,
 121                             gs_out_prim,
 122                             max_vertices );
 123
 124       *max_vertices = MAX2( *max_vertices, 4096 );
 125    }
 126    else {
 127       /* limit max fetches by limiting max_vertices */
 128       *max_vertices = 4096;
 129    }
 130
 131    /* No need to prepare the shader.
 132     */
 133    vs->prepare(vs, draw);
 134 }
 135
 136
 137 static void
 138 fetch_pipeline_bind_parameters(struct draw_pt_middle_end *middle)
 139 {
 140    /* No-op since the vertex shader executor and drawing pipeline
 141     * just grab the constants, viewport, etc. from the draw context state.
 142     */
 143 }
 144
 145
 146 static void fetch( struct pt_fetch *fetch,
 147                    const struct draw_fetch_info *fetch_info,
 148                    char *output)
 149 {
 150    if (fetch_info->linear) {
 151       draw_pt_fetch_run_linear( fetch,
 152                                 fetch_info->start,
 153                                 fetch_info->count,
 154                                 output );
 155    }
 156    else {
 157       draw_pt_fetch_run( fetch,
 158                          fetch_info->elts,
 159                          fetch_info->count,
 160                          output );
 161    }
 162 }
 163
 164
 165 static void pipeline(struct fetch_pipeline_middle_end *fpme,
 166                      const struct draw_vertex_info *vert_info,
 167                      const struct draw_prim_info *prim_info)
 168 {
 169    if (prim_info->linear)
 170       draw_pipeline_run_linear( fpme->draw,
 171                                 vert_info,
 172                                 prim_info);
 173    else
 174       draw_pipeline_run( fpme->draw,
 175                          vert_info,
 176                          prim_info );
 177 }
 178
 179 static void emit(struct pt_emit *emit,
 180                  const struct draw_vertex_info *vert_info,
 181                  const struct draw_prim_info *prim_info)
 182 {
 183    if (prim_info->linear) {
 184       draw_pt_emit_linear(emit, vert_info, prim_info);
 185    }
 186    else {
 187       draw_pt_emit(emit, vert_info, prim_info);
 188    }
 189 }
 190
 191
 192 static void draw_vertex_shader_run(struct draw_vertex_shader *vshader,
 193                                    const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 194                                    unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
 195                                    const struct draw_vertex_info *input_verts,
 196                                    struct draw_vertex_info *output_verts )
 197 {
 198    output_verts->vertex_size = input_verts->vertex_size;
 199    output_verts->stride = input_verts->vertex_size;
 200    output_verts->count = input_verts->count;
 201    output_verts->verts =
 202       (struct vertex_header *)MALLOC(output_verts->vertex_size *
 203                                      align(output_verts->count, 4));
 204
 205    vshader->run_linear(vshader,
 206                        (const float (*)[4])input_verts->verts->data,
 207                        (      float (*)[4])output_verts->verts->data,
 208                        constants,
 209                        const_size,
 210                        input_verts->count,
 211                        input_verts->vertex_size,
 212                        input_verts->vertex_size);
 213 }
 214
 215 static void fetch_pipeline_generic( struct draw_pt_middle_end *middle,
 216                                     const struct draw_fetch_info *fetch_info,
 217                                     const struct draw_prim_info *in_prim_info )
 218 {
 219    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 220    struct draw_context *draw = fpme->draw;
 221    struct draw_vertex_shader *vshader = draw->vs.vertex_shader;
 222    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 223    struct draw_prim_info gs_prim_info;
 224    struct draw_vertex_info fetched_vert_info;
 225    struct draw_vertex_info vs_vert_info;
 226    struct draw_vertex_info gs_vert_info;
 227    struct draw_vertex_info *vert_info;
 228    struct draw_prim_info ia_prim_info;
 229    struct draw_vertex_info ia_vert_info;
 230    const struct draw_prim_info *prim_info = in_prim_info;
 231    boolean free_prim_info = FALSE;
 232    unsigned opt = fpme->opt;
 233
 234    fetched_vert_info.count = fetch_info->count;
 235    fetched_vert_info.vertex_size = fpme->vertex_size;
 236    fetched_vert_info.stride = fpme->vertex_size;
 237    fetched_vert_info.verts =
 238       (struct vertex_header *)MALLOC(fpme->vertex_size *
 239                                      align(fetch_info->count,  4));
 240    if (!fetched_vert_info.verts) {
 241       assert(0);
 242       return;
 243    }
 244    if (draw->collect_statistics) {
 245       draw->statistics.ia_vertices += prim_info->count;
 246       draw->statistics.ia_primitives +=
 247          u_decomposed_prims_for_vertices(prim_info->prim, fetch_info->count);
 248       draw->statistics.vs_invocations += fetch_info->count;
 249    }
 250
 251    /* Fetch into our vertex buffer.
 252     */
 253    fetch( fpme->fetch, fetch_info, (char *)fetched_vert_info.verts );
 254
 255    /* Finished with fetch:
 256     */
 257    fetch_info = NULL;
 258    vert_info = &fetched_vert_info;
 259
 260    /* Run the shader, note that this overwrites the data[] parts of
 261     * the pipeline verts.
 262     */
 263    if (fpme->opt & PT_SHADE) {
 264       draw_vertex_shader_run(vshader,
 265                              draw->pt.user.vs_constants,
 266                              draw->pt.user.vs_constants_size,
 267                              vert_info,
 268                              &vs_vert_info);
 269
 270       FREE(vert_info->verts);
 271       vert_info = &vs_vert_info;
 272    }
 273
 274    if ((fpme->opt & PT_SHADE) && gshader) {
 275       draw_geometry_shader_run(gshader,
 276                                draw->pt.user.gs_constants,
 277                                draw->pt.user.gs_constants_size,
 278                                vert_info,
 279                                prim_info,
 280                                &vshader->info,
 281                                &gs_vert_info,
 282                                &gs_prim_info);
 283
 284       FREE(vert_info->verts);
 285       vert_info = &gs_vert_info;
 286       prim_info = &gs_prim_info;
 287    } else {
 288       if (draw_prim_assembler_is_required(draw, prim_info, vert_info)) {
 289          draw_prim_assembler_run(draw, prim_info, vert_info,
 290                                  &ia_prim_info, &ia_vert_info);
 291
 292          if (ia_vert_info.count) {
 293             FREE(vert_info->verts);
 294             vert_info = &ia_vert_info;
 295             prim_info = &ia_prim_info;
 296             free_prim_info = TRUE;
 297          }
 298       }
 299    }
 300    if (prim_info->count == 0) {
 301       debug_printf("GS/IA didn't emit any vertices!\n");
 302
 303       FREE(vert_info->verts);
 304       if (free_prim_info) {
 305          FREE(prim_info->primitive_lengths);
 306       }
 307       return;
 308    }
 309
 310
 311    /* Stream output needs to be done before clipping.
 312     *
 313     * XXX: Stream output surely needs to respect the prim_info->elt
 314     *      lists.
 315     */
 316    draw_pt_so_emit( fpme->so_emit, vert_info, prim_info );
 317
 318    draw_stats_clipper_primitives(draw, prim_info);
 319
 320    /*
 321     * if there's no position, need to stop now, or the latter stages
 322     * will try to access non-existent position output.
 323     */
 324    if (draw_current_shader_position_output(draw) != -1) {
 325
 326       if (draw_pt_post_vs_run( fpme->post_vs, vert_info, prim_info ))
 327       {
 328          opt |= PT_PIPELINE;
 329       }
 330
 331       /* Do we need to run the pipeline?
 332        */
 333       if (opt & PT_PIPELINE) {
 334          pipeline( fpme, vert_info, prim_info );
 335       }
 336       else {
 337          emit( fpme->emit, vert_info, prim_info );
 338       }
 339    }
 340    FREE(vert_info->verts);
 341    if (free_prim_info) {
 342       FREE(prim_info->primitive_lengths);
 343    }
 344 }
 345
 346 static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
 347                                 const unsigned *fetch_elts,
 348                                 unsigned fetch_count,
 349                                 const ushort *draw_elts,
 350                                 unsigned draw_count,
 351                                 unsigned prim_flags )
 352 {
 353    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 354    struct draw_fetch_info fetch_info;
 355    struct draw_prim_info prim_info;
 356
 357    fetch_info.linear = FALSE;
 358    fetch_info.start = 0;
 359    fetch_info.elts = fetch_elts;
 360    fetch_info.count = fetch_count;
 361
 362    prim_info.linear = FALSE;
 363    prim_info.start = 0;
 364    prim_info.count = draw_count;
 365    prim_info.elts = draw_elts;
 366    prim_info.prim = fpme->input_prim;
 367    prim_info.flags = prim_flags;
 368    prim_info.primitive_count = 1;
 369    prim_info.primitive_lengths = &draw_count;
 370
 371    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 372 }
 373
 374
 375 static void fetch_pipeline_linear_run( struct draw_pt_middle_end *middle,
 376                                        unsigned start,
 377                                        unsigned count,
 378                                        unsigned prim_flags)
 379 {
 380    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 381    struct draw_fetch_info fetch_info;
 382    struct draw_prim_info prim_info;
 383
 384    fetch_info.linear = TRUE;
 385    fetch_info.start = start;
 386    fetch_info.count = count;
 387    fetch_info.elts = NULL;
 388
 389    prim_info.linear = TRUE;
 390    prim_info.start = 0;
 391    prim_info.count = count;
 392    prim_info.elts = NULL;
 393    prim_info.prim = fpme->input_prim;
 394    prim_info.flags = prim_flags;
 395    prim_info.primitive_count = 1;
 396    prim_info.primitive_lengths = &count;
 397
 398    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 399 }
 400
 401
 402
 403 static boolean fetch_pipeline_linear_run_elts( struct draw_pt_middle_end *middle,
 404                                                unsigned start,
 405                                                unsigned count,
 406                                                const ushort *draw_elts,
 407                                                unsigned draw_count,
 408                                                unsigned prim_flags )
 409 {
 410    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 411    struct draw_fetch_info fetch_info;
 412    struct draw_prim_info prim_info;
 413
 414    fetch_info.linear = TRUE;
 415    fetch_info.start = start;
 416    fetch_info.count = count;
 417    fetch_info.elts = NULL;
 418
 419    prim_info.linear = FALSE;
 420    prim_info.start = 0;
 421    prim_info.count = draw_count;
 422    prim_info.elts = draw_elts;
 423    prim_info.prim = fpme->input_prim;
 424    prim_info.flags = prim_flags;
 425    prim_info.primitive_count = 1;
 426    prim_info.primitive_lengths = &draw_count;
 427
 428    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 429
 430    return TRUE;
 431 }
 432
 433
 434
 435 static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
 436 {
 437    /* nothing to do */
 438 }
 439
 440 static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
 441 {
 442    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 443
 444    if (fpme->fetch)
 445       draw_pt_fetch_destroy( fpme->fetch );
 446
 447    if (fpme->emit)
 448       draw_pt_emit_destroy( fpme->emit );
 449
 450    if (fpme->so_emit)
 451       draw_pt_so_emit_destroy( fpme->so_emit );
 452
 453    if (fpme->post_vs)
 454       draw_pt_post_vs_destroy( fpme->post_vs );
 455
 456    FREE(middle);
 457 }
 458
 459
 460 struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
 461 {
 462    struct fetch_pipeline_middle_end *fpme = CALLOC_STRUCT( fetch_pipeline_middle_end );
 463    if (!fpme)
 464       goto fail;
 465
 466    fpme->base.prepare        = fetch_pipeline_prepare;
 467    fpme->base.bind_parameters  = fetch_pipeline_bind_parameters;
 468    fpme->base.run            = fetch_pipeline_run;
 469    fpme->base.run_linear     = fetch_pipeline_linear_run;
 470    fpme->base.run_linear_elts = fetch_pipeline_linear_run_elts;
 471    fpme->base.finish         = fetch_pipeline_finish;
 472    fpme->base.destroy        = fetch_pipeline_destroy;
 473
 474    fpme->draw = draw;
 475
 476    fpme->fetch = draw_pt_fetch_create( draw );
 477    if (!fpme->fetch)
 478       goto fail;
 479
 480    fpme->post_vs = draw_pt_post_vs_create( draw );
 481    if (!fpme->post_vs)
 482       goto fail;
 483
 484    fpme->emit = draw_pt_emit_create( draw );
 485    if (!fpme->emit)
 486       goto fail;
 487
 488    fpme->so_emit = draw_pt_so_emit_create( draw );
 489    if (!fpme->so_emit)
 490       goto fail;
 491
 492    return &fpme->base;
 493
 494  fail:
 495    if (fpme)
 496       fetch_pipeline_destroy( &fpme->base );
 497
 498    return NULL;
 499 }