src/gallium/auxiliary/draw/draw_pt_fetch_emit.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
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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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #include "util/u_memory.h"
  34 #include "draw/draw_context.h"
  35 #include "draw/draw_private.h"
  36 #include "draw/draw_vbuf.h"
  37 #include "draw/draw_vertex.h"
  38 #include "draw/draw_pt.h"
  39 #include "draw/draw_gs.h"
  40 #include "translate/translate.h"
  41 #include "translate/translate_cache.h"
  42
  43 /* The simplest 'middle end' in the new vertex code.
  44  *
  45  * The responsibilities of a middle end are to:
  46  *  - perform vertex fetch using
  47  *       - draw vertex element/buffer state
  48  *       - a list of fetch indices we received as an input
  49  *  - run the vertex shader
  50  *  - cliptest,
  51  *  - clip coord calculation
  52  *  - viewport transformation
  53  *  - if necessary, run the primitive pipeline, passing it:
  54  *       - a linear array of vertex_header vertices constructed here
  55  *       - a set of draw indices we received as an input
  56  *  - otherwise, drive the hw backend,
  57  *       - allocate space for hardware format vertices
  58  *       - translate the vertex-shader output vertices to hw format
  59  *       - calling the backend draw functions.
  60  *
  61  * For convenience, we provide a helper function to drive the hardware
  62  * backend given similar inputs to those required to run the pipeline.
  63  *
  64  * In the case of passthrough mode, many of these actions are disabled
  65  * or noops, so we end up doing:
  66  *
  67  *  - perform vertex fetch
  68  *  - drive the hw backend
  69  *
  70  * IE, basically just vertex fetch to post-vs-format vertices,
  71  * followed by a call to the backend helper function.
  72  */
  73
  74
  75 struct fetch_emit_middle_end {
  76    struct draw_pt_middle_end base;
  77    struct draw_context *draw;
  78
  79    struct translate *translate;
  80    const struct vertex_info *vinfo;
  81
  82    /* Cache point size somewhere it's address won't change:
  83     */
  84    float point_size;
  85
  86    struct translate_cache *cache;
  87 };
  88
  89
  90
  91
  92 static void fetch_emit_prepare( struct draw_pt_middle_end *middle,
  93                                 unsigned prim,
  94                                 unsigned opt,
  95                                 unsigned *max_vertices )
  96 {
  97    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
  98    struct draw_context *draw = feme->draw;
  99    const struct vertex_info *vinfo;
 100    unsigned i, dst_offset;
 101    boolean ok;
 102    struct translate_key key;
 103
 104    unsigned gs_out_prim = (draw->gs.geometry_shader ?
 105                            draw->gs.geometry_shader->output_primitive :
 106                            prim);
 107
 108
 109
 110    ok = draw->render->set_primitive( draw->render,
 111                                      gs_out_prim );
 112    if (!ok) {
 113       assert(0);
 114       return;
 115    }
 116
 117    /* Must do this after set_primitive() above:
 118     */
 119    vinfo = feme->vinfo = draw->render->get_vertex_info(draw->render);
 120
 121
 122
 123    /* Transform from API vertices to HW vertices, skipping the
 124     * pipeline_vertex intermediate step.
 125     */
 126    dst_offset = 0;
 127    memset(&key, 0, sizeof(key));
 128
 129    for (i = 0; i < vinfo->num_attribs; i++) {
 130       const struct pipe_vertex_element *src = &draw->pt.vertex_element[vinfo->attrib[i].src_index];
 131
 132       unsigned emit_sz = 0;
 133       unsigned input_format = src->src_format;
 134       unsigned input_buffer = src->vertex_buffer_index;
 135       unsigned input_offset = src->src_offset;
 136       unsigned output_format;
 137
 138       output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
 139       emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
 140
 141       if (vinfo->attrib[i].emit == EMIT_OMIT)
 142          continue;
 143
 144       if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
 145          input_format = PIPE_FORMAT_R32_FLOAT;
 146          input_buffer = draw->pt.nr_vertex_buffers;
 147          input_offset = 0;
 148       }
 149
 150       key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
 151       key.element[i].input_format = input_format;
 152       key.element[i].input_buffer = input_buffer;
 153       key.element[i].input_offset = input_offset;
 154       key.element[i].instance_divisor = src->instance_divisor;
 155       key.element[i].output_format = output_format;
 156       key.element[i].output_offset = dst_offset;
 157
 158       dst_offset += emit_sz;
 159    }
 160
 161    key.nr_elements = vinfo->num_attribs;
 162    key.output_stride = vinfo->size * 4;
 163
 164    /* Don't bother with caching at this stage:
 165     */
 166    if (!feme->translate ||
 167        translate_key_compare(&feme->translate->key, &key) != 0)
 168    {
 169       translate_key_sanitize(&key);
 170       feme->translate = translate_cache_find(feme->cache,
 171                                              &key);
 172
 173
 174       feme->translate->set_buffer(feme->translate,
 175                                   draw->pt.nr_vertex_buffers,
 176                                   &feme->point_size,
 177                                   0,
 178                                   ~0);
 179    }
 180
 181    feme->point_size = draw->rasterizer->point_size;
 182
 183    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 184       feme->translate->set_buffer(feme->translate,
 185                                   i,
 186                                   ((char *)draw->pt.user.vbuffer[i] +
 187                                    draw->pt.vertex_buffer[i].buffer_offset),
 188                                   draw->pt.vertex_buffer[i].stride,
 189                                   draw->pt.max_index);
 190    }
 191
 192    *max_vertices = (draw->render->max_vertex_buffer_bytes /
 193                     (vinfo->size * 4));
 194 }
 195
 196
 197
 198
 199
 200 static void fetch_emit_run( struct draw_pt_middle_end *middle,
 201                             const unsigned *fetch_elts,
 202                             unsigned fetch_count,
 203                             const ushort *draw_elts,
 204                             unsigned draw_count,
 205                             unsigned prim_flags )
 206 {
 207    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 208    struct draw_context *draw = feme->draw;
 209    void *hw_verts;
 210
 211    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 212     */
 213    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 214
 215    draw->render->allocate_vertices( draw->render,
 216                                     (ushort)feme->translate->key.output_stride,
 217                                     (ushort)fetch_count );
 218
 219    hw_verts = draw->render->map_vertices( draw->render );
 220    if (!hw_verts) {
 221       assert(0);
 222       return;
 223    }
 224
 225
 226    /* Single routine to fetch vertices and emit HW verts.
 227     */
 228    feme->translate->run_elts( feme->translate,
 229                               fetch_elts,
 230                               fetch_count,
 231                               draw->instance_id,
 232                               hw_verts );
 233
 234    if (0) {
 235       unsigned i;
 236       for (i = 0; i < fetch_count; i++) {
 237          debug_printf("\n\nvertex %d:\n", i);
 238          draw_dump_emitted_vertex( feme->vinfo,
 239                                    (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
 240       }
 241    }
 242
 243    draw->render->unmap_vertices( draw->render,
 244                                  0,
 245                                  (ushort)(fetch_count - 1) );
 246
 247    /* XXX: Draw arrays path to avoid re-emitting index list again and
 248     * again.
 249     */
 250    draw->render->draw_elements( draw->render,
 251                                 draw_elts,
 252                                 draw_count );
 253
 254    /* Done -- that was easy, wasn't it:
 255     */
 256    draw->render->release_vertices( draw->render );
 257
 258 }
 259
 260
 261 static void fetch_emit_run_linear( struct draw_pt_middle_end *middle,
 262                                    unsigned start,
 263                                    unsigned count,
 264                                    unsigned prim_flags )
 265 {
 266    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 267    struct draw_context *draw = feme->draw;
 268    void *hw_verts;
 269
 270    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 271     */
 272    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 273
 274    if (!draw->render->allocate_vertices( draw->render,
 275                                          (ushort)feme->translate->key.output_stride,
 276                                          (ushort)count ))
 277       goto fail;
 278
 279    hw_verts = draw->render->map_vertices( draw->render );
 280    if (!hw_verts)
 281       goto fail;
 282
 283    /* Single routine to fetch vertices and emit HW verts.
 284     */
 285    feme->translate->run( feme->translate,
 286                          start,
 287                          count,
 288                          draw->instance_id,
 289                          hw_verts );
 290
 291    if (0) {
 292       unsigned i;
 293       for (i = 0; i < count; i++) {
 294          debug_printf("\n\nvertex %d:\n", i);
 295          draw_dump_emitted_vertex( feme->vinfo,
 296                                    (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
 297       }
 298    }
 299
 300    draw->render->unmap_vertices( draw->render, 0, count - 1 );
 301
 302    /* XXX: Draw arrays path to avoid re-emitting index list again and
 303     * again.
 304     */
 305    draw->render->draw_arrays( draw->render, 0, count );
 306
 307    /* Done -- that was easy, wasn't it:
 308     */
 309    draw->render->release_vertices( draw->render );
 310    return;
 311
 312 fail:
 313    assert(0);
 314    return;
 315 }
 316
 317
 318 static boolean fetch_emit_run_linear_elts( struct draw_pt_middle_end *middle,
 319                                         unsigned start,
 320                                         unsigned count,
 321                                         const ushort *draw_elts,
 322                                         unsigned draw_count,
 323                                         unsigned prim_flags )
 324 {
 325    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 326    struct draw_context *draw = feme->draw;
 327    void *hw_verts;
 328
 329    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 330     */
 331    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 332
 333    if (!draw->render->allocate_vertices( draw->render,
 334                                          (ushort)feme->translate->key.output_stride,
 335                                          (ushort)count ))
 336       return FALSE;
 337
 338    hw_verts = draw->render->map_vertices( draw->render );
 339    if (!hw_verts)
 340       return FALSE;
 341
 342    /* Single routine to fetch vertices and emit HW verts.
 343     */
 344    feme->translate->run( feme->translate,
 345                          start,
 346                          count,
 347                          draw->instance_id,
 348                          hw_verts );
 349
 350    draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
 351
 352    /* XXX: Draw arrays path to avoid re-emitting index list again and
 353     * again.
 354     */
 355    draw->render->draw_elements( draw->render,
 356                                 draw_elts,
 357                                 draw_count );
 358
 359    /* Done -- that was easy, wasn't it:
 360     */
 361    draw->render->release_vertices( draw->render );
 362
 363    return TRUE;
 364 }
 365
 366
 367
 368
 369 static void fetch_emit_finish( struct draw_pt_middle_end *middle )
 370 {
 371    /* nothing to do */
 372 }
 373
 374 static void fetch_emit_destroy( struct draw_pt_middle_end *middle )
 375 {
 376    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 377
 378    if (feme->cache)
 379       translate_cache_destroy(feme->cache);
 380
 381    FREE(middle);
 382 }
 383
 384
 385 struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw )
 386 {
 387    struct fetch_emit_middle_end *fetch_emit = CALLOC_STRUCT( fetch_emit_middle_end );
 388    if (fetch_emit == NULL)
 389       return NULL;
 390
 391    fetch_emit->cache = translate_cache_create();
 392    if (!fetch_emit->cache) {
 393       FREE(fetch_emit);
 394       return NULL;
 395    }
 396
 397    fetch_emit->base.prepare    = fetch_emit_prepare;
 398    fetch_emit->base.run        = fetch_emit_run;
 399    fetch_emit->base.run_linear = fetch_emit_run_linear;
 400    fetch_emit->base.run_linear_elts = fetch_emit_run_linear_elts;
 401    fetch_emit->base.finish     = fetch_emit_finish;
 402    fetch_emit->base.destroy    = fetch_emit_destroy;
 403
 404    fetch_emit->draw = draw;
 405
 406    return &fetch_emit->base;
 407 }
 408