src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.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,
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  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 #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_pt.h"
  35 #include "draw/draw_vs.h"
  36 #include "draw/draw_gs.h"
  37
  38
  39 struct fetch_pipeline_middle_end {
  40    struct draw_pt_middle_end base;
  41    struct draw_context *draw;
  42
  43    struct pt_emit *emit;
  44    struct pt_so_emit *so_emit;
  45    struct pt_fetch *fetch;
  46    struct pt_post_vs *post_vs;
  47
  48    unsigned vertex_data_offset;
  49    unsigned vertex_size;
  50    unsigned input_prim;
  51    unsigned opt;
  52 };
  53
  54 static void fetch_pipeline_prepare( struct draw_pt_middle_end *middle,
  55                                     unsigned prim,
  56                                     unsigned opt,
  57                                     unsigned *max_vertices )
  58 {
  59    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
  60    struct draw_context *draw = fpme->draw;
  61    struct draw_vertex_shader *vs = draw->vs.vertex_shader;
  62    unsigned i;
  63    unsigned instance_id_index = ~0;
  64
  65    unsigned gs_out_prim = (draw->gs.geometry_shader ?
  66                            draw->gs.geometry_shader->output_primitive :
  67                            prim);
  68
  69    /* Add one to num_outputs because the pipeline occasionally tags on
  70     * an additional texcoord, eg for AA lines.
  71     */
  72    unsigned nr = MAX2( vs->info.num_inputs,
  73                        vs->info.num_outputs + 1 );
  74
  75    /* Scan for instanceID system value.
  76     */
  77    for (i = 0; i < vs->info.num_inputs; i++) {
  78       if (vs->info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
  79          instance_id_index = i;
  80          break;
  81       }
  82    }
  83
  84    fpme->input_prim = prim;
  85    fpme->opt = opt;
  86
  87    /* Always leave room for the vertex header whether we need it or
  88     * not.  It's hard to get rid of it in particular because of the
  89     * viewport code in draw_pt_post_vs.c.
  90     */
  91    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
  92
  93
  94
  95    draw_pt_fetch_prepare( fpme->fetch,
  96                           vs->info.num_inputs,
  97                           fpme->vertex_size,
  98                           instance_id_index );
  99    /* XXX: it's not really gl rasterization rules we care about here,
 100     * but gl vs dx9 clip spaces.
 101     */
 102    draw_pt_post_vs_prepare( fpme->post_vs,
 103                             draw->clip_xy,
 104                             draw->clip_z,
 105                             draw->clip_user,
 106                             draw->identity_viewport,
 107                             (boolean)draw->rasterizer->gl_rasterization_rules,
 108                             (draw->vs.edgeflag_output ? TRUE : FALSE) );
 109
 110    draw_pt_so_emit_prepare( fpme->so_emit );
 111
 112    if (!(opt & PT_PIPELINE)) {
 113       draw_pt_emit_prepare( fpme->emit,
 114                             gs_out_prim,
 115                             max_vertices );
 116
 117       *max_vertices = MAX2( *max_vertices, 4096 );
 118    }
 119    else {
 120       /* limit max fetches by limiting max_vertices */
 121       *max_vertices = 4096;
 122    }
 123
 124    /* No need to prepare the shader.
 125     */
 126    vs->prepare(vs, draw);
 127 }
 128
 129
 130 static void fetch( struct pt_fetch *fetch,
 131                    const struct draw_fetch_info *fetch_info,
 132                    char *output)
 133 {
 134    if (fetch_info->linear) {
 135       draw_pt_fetch_run_linear( fetch,
 136                                 fetch_info->start,
 137                                 fetch_info->count,
 138                                 output );
 139    }
 140    else {
 141       draw_pt_fetch_run( fetch,
 142                          fetch_info->elts,
 143                          fetch_info->count,
 144                          output );
 145    }
 146 }
 147
 148
 149 static void pipeline(struct fetch_pipeline_middle_end *fpme,
 150                      const struct draw_vertex_info *vert_info,
 151                      const struct draw_prim_info *prim_info)
 152 {
 153    if (prim_info->linear)
 154       draw_pipeline_run_linear( fpme->draw,
 155                                 vert_info,
 156                                 prim_info);
 157    else
 158       draw_pipeline_run( fpme->draw,
 159                          vert_info,
 160                          prim_info );
 161 }
 162
 163 static void emit(struct pt_emit *emit,
 164                  const struct draw_vertex_info *vert_info,
 165                  const struct draw_prim_info *prim_info)
 166 {
 167    if (prim_info->linear) {
 168       draw_pt_emit_linear(emit, vert_info, prim_info);
 169    }
 170    else {
 171       draw_pt_emit(emit, vert_info, prim_info);
 172    }
 173 }
 174
 175
 176 static void draw_vertex_shader_run(struct draw_vertex_shader *vshader,
 177                                    const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
 178                                    unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
 179                                    const struct draw_vertex_info *input_verts,
 180                                    struct draw_vertex_info *output_verts )
 181 {
 182    output_verts->vertex_size = input_verts->vertex_size;
 183    output_verts->stride = input_verts->vertex_size;
 184    output_verts->count = input_verts->count;
 185    output_verts->verts =
 186       (struct vertex_header *)MALLOC(output_verts->vertex_size *
 187                                      align(output_verts->count, 4));
 188
 189    vshader->run_linear(vshader,
 190                        (const float (*)[4])input_verts->verts->data,
 191                        (      float (*)[4])output_verts->verts->data,
 192                        constants,
 193                        const_size,
 194                        input_verts->count,
 195                        input_verts->vertex_size,
 196                        input_verts->vertex_size);
 197 }
 198
 199 static void fetch_pipeline_generic( struct draw_pt_middle_end *middle,
 200                                     const struct draw_fetch_info *fetch_info,
 201                                     const struct draw_prim_info *prim_info )
 202 {
 203    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 204    struct draw_context *draw = fpme->draw;
 205    struct draw_vertex_shader *vshader = draw->vs.vertex_shader;
 206    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 207    struct draw_prim_info gs_prim_info;
 208    struct draw_vertex_info fetched_vert_info;
 209    struct draw_vertex_info vs_vert_info;
 210    struct draw_vertex_info gs_vert_info;
 211    struct draw_vertex_info *vert_info;
 212    unsigned opt = fpme->opt;
 213
 214    fetched_vert_info.count = fetch_info->count;
 215    fetched_vert_info.vertex_size = fpme->vertex_size;
 216    fetched_vert_info.stride = fpme->vertex_size;
 217    fetched_vert_info.verts =
 218       (struct vertex_header *)MALLOC(fpme->vertex_size *
 219                                      align(fetch_info->count,  4));
 220    if (!fetched_vert_info.verts) {
 221       assert(0);
 222       return;
 223    }
 224
 225    /* Fetch into our vertex buffer.
 226     */
 227    fetch( fpme->fetch, fetch_info, (char *)fetched_vert_info.verts );
 228
 229    /* Finished with fetch:
 230     */
 231    fetch_info = NULL;
 232    vert_info = &fetched_vert_info;
 233
 234    /* Run the shader, note that this overwrites the data[] parts of
 235     * the pipeline verts.
 236     */
 237    if (fpme->opt & PT_SHADE) {
 238       draw_vertex_shader_run(vshader,
 239                              draw->pt.user.vs_constants,
 240                              draw->pt.user.vs_constants_size,
 241                              vert_info,
 242                              &vs_vert_info);
 243
 244       FREE(vert_info->verts);
 245       vert_info = &vs_vert_info;
 246    }
 247
 248    if ((fpme->opt & PT_SHADE) && gshader) {
 249       draw_geometry_shader_run(gshader,
 250                                draw->pt.user.gs_constants,
 251                                draw->pt.user.gs_constants_size,
 252                                vert_info,
 253                                prim_info,
 254                                &gs_vert_info,
 255                                &gs_prim_info);
 256
 257       FREE(vert_info->verts);
 258       vert_info = &gs_vert_info;
 259       prim_info = &gs_prim_info;
 260    }
 261
 262
 263    /* Stream output needs to be done before clipping.
 264     *
 265     * XXX: Stream output surely needs to respect the prim_info->elt
 266     *      lists.
 267     */
 268    draw_pt_so_emit( fpme->so_emit,
 269                     vert_info,
 270                     prim_info );
 271
 272    if (draw_pt_post_vs_run( fpme->post_vs,
 273                             vert_info ))
 274    {
 275       opt |= PT_PIPELINE;
 276    }
 277
 278    /* Do we need to run the pipeline?
 279     */
 280    if (opt & PT_PIPELINE) {
 281       pipeline( fpme,
 282                 vert_info,
 283                 prim_info );
 284    }
 285    else {
 286       emit( fpme->emit,
 287             vert_info,
 288             prim_info );
 289    }
 290    FREE(vert_info->verts);
 291 }
 292
 293 static void fetch_pipeline_run( struct draw_pt_middle_end *middle,
 294                                 const unsigned *fetch_elts,
 295                                 unsigned fetch_count,
 296                                 const ushort *draw_elts,
 297                                 unsigned draw_count,
 298                                 unsigned prim_flags )
 299 {
 300    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 301    struct draw_fetch_info fetch_info;
 302    struct draw_prim_info prim_info;
 303
 304    fetch_info.linear = FALSE;
 305    fetch_info.start = 0;
 306    fetch_info.elts = fetch_elts;
 307    fetch_info.count = fetch_count;
 308
 309    prim_info.linear = FALSE;
 310    prim_info.start = 0;
 311    prim_info.count = draw_count;
 312    prim_info.elts = draw_elts;
 313    prim_info.prim = fpme->input_prim;
 314    prim_info.flags = prim_flags;
 315    prim_info.primitive_count = 1;
 316    prim_info.primitive_lengths = &draw_count;
 317
 318    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 319 }
 320
 321
 322 static void fetch_pipeline_linear_run( struct draw_pt_middle_end *middle,
 323                                        unsigned start,
 324                                        unsigned count,
 325                                        unsigned prim_flags)
 326 {
 327    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 328    struct draw_fetch_info fetch_info;
 329    struct draw_prim_info prim_info;
 330
 331    fetch_info.linear = TRUE;
 332    fetch_info.start = start;
 333    fetch_info.count = count;
 334    fetch_info.elts = NULL;
 335
 336    prim_info.linear = TRUE;
 337    prim_info.start = 0;
 338    prim_info.count = count;
 339    prim_info.elts = NULL;
 340    prim_info.prim = fpme->input_prim;
 341    prim_info.flags = prim_flags;
 342    prim_info.primitive_count = 1;
 343    prim_info.primitive_lengths = &count;
 344
 345    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 346 }
 347
 348
 349
 350 static boolean fetch_pipeline_linear_run_elts( struct draw_pt_middle_end *middle,
 351                                                unsigned start,
 352                                                unsigned count,
 353                                                const ushort *draw_elts,
 354                                                unsigned draw_count,
 355                                                unsigned prim_flags )
 356 {
 357    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 358    struct draw_fetch_info fetch_info;
 359    struct draw_prim_info prim_info;
 360
 361    fetch_info.linear = TRUE;
 362    fetch_info.start = start;
 363    fetch_info.count = count;
 364    fetch_info.elts = NULL;
 365
 366    prim_info.linear = FALSE;
 367    prim_info.start = 0;
 368    prim_info.count = draw_count;
 369    prim_info.elts = draw_elts;
 370    prim_info.prim = fpme->input_prim;
 371    prim_info.flags = prim_flags;
 372    prim_info.primitive_count = 1;
 373    prim_info.primitive_lengths = &draw_count;
 374
 375    fetch_pipeline_generic( middle, &fetch_info, &prim_info );
 376
 377    return TRUE;
 378 }
 379
 380
 381
 382 static void fetch_pipeline_finish( struct draw_pt_middle_end *middle )
 383 {
 384    /* nothing to do */
 385 }
 386
 387 static void fetch_pipeline_destroy( struct draw_pt_middle_end *middle )
 388 {
 389    struct fetch_pipeline_middle_end *fpme = (struct fetch_pipeline_middle_end *)middle;
 390
 391    if (fpme->fetch)
 392       draw_pt_fetch_destroy( fpme->fetch );
 393
 394    if (fpme->emit)
 395       draw_pt_emit_destroy( fpme->emit );
 396
 397    if (fpme->so_emit)
 398       draw_pt_so_emit_destroy( fpme->so_emit );
 399
 400    if (fpme->post_vs)
 401       draw_pt_post_vs_destroy( fpme->post_vs );
 402
 403    FREE(middle);
 404 }
 405
 406
 407 struct draw_pt_middle_end *draw_pt_fetch_pipeline_or_emit( struct draw_context *draw )
 408 {
 409    struct fetch_pipeline_middle_end *fpme = CALLOC_STRUCT( fetch_pipeline_middle_end );
 410    if (!fpme)
 411       goto fail;
 412
 413    fpme->base.prepare        = fetch_pipeline_prepare;
 414    fpme->base.run            = fetch_pipeline_run;
 415    fpme->base.run_linear     = fetch_pipeline_linear_run;
 416    fpme->base.run_linear_elts = fetch_pipeline_linear_run_elts;
 417    fpme->base.finish         = fetch_pipeline_finish;
 418    fpme->base.destroy        = fetch_pipeline_destroy;
 419
 420    fpme->draw = draw;
 421
 422    fpme->fetch = draw_pt_fetch_create( draw );
 423    if (!fpme->fetch)
 424       goto fail;
 425
 426    fpme->post_vs = draw_pt_post_vs_create( draw );
 427    if (!fpme->post_vs)
 428       goto fail;
 429
 430    fpme->emit = draw_pt_emit_create( draw );
 431    if (!fpme->emit)
 432       goto fail;
 433
 434    fpme->so_emit = draw_pt_so_emit_create( draw );
 435    if (!fpme->so_emit)
 436       goto fail;
 437
 438    return &fpme->base;
 439
 440  fail:
 441    if (fpme)
 442       fetch_pipeline_destroy( &fpme->base );
 443
 444    return NULL;
 445 }