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