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