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
   7  * copy of this software and associated documentation files (the
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  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
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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.vertex_buffer[i].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    if (fetch_count >= UNDEFINED_VERTEX_ID) {
 216       assert(0);
 217       return;
 218    }
 219
 220    draw->render->allocate_vertices( draw->render,
 221                                     (ushort)feme->translate->key.output_stride,
 222                                     (ushort)fetch_count );
 223
 224    hw_verts = draw->render->map_vertices( draw->render );
 225    if (!hw_verts) {
 226       assert(0);
 227       return;
 228    }
 229
 230
 231    /* Single routine to fetch vertices and emit HW verts.
 232     */
 233    feme->translate->run_elts( feme->translate,
 234                               fetch_elts,
 235                               fetch_count,
 236                               draw->instance_id,
 237                               hw_verts );
 238
 239    if (0) {
 240       unsigned i;
 241       for (i = 0; i < fetch_count; i++) {
 242          debug_printf("\n\nvertex %d:\n", i);
 243          draw_dump_emitted_vertex( feme->vinfo,
 244                                    (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
 245       }
 246    }
 247
 248    draw->render->unmap_vertices( draw->render,
 249                                  0,
 250                                  (ushort)(fetch_count - 1) );
 251
 252    /* XXX: Draw arrays path to avoid re-emitting index list again and
 253     * again.
 254     */
 255    draw->render->draw_elements( draw->render,
 256                                 draw_elts,
 257                                 draw_count );
 258
 259    /* Done -- that was easy, wasn't it:
 260     */
 261    draw->render->release_vertices( draw->render );
 262
 263 }
 264
 265
 266 static void fetch_emit_run_linear( struct draw_pt_middle_end *middle,
 267                                    unsigned start,
 268                                    unsigned count,
 269                                    unsigned prim_flags )
 270 {
 271    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 272    struct draw_context *draw = feme->draw;
 273    void *hw_verts;
 274
 275    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 276     */
 277    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 278
 279    if (count >= UNDEFINED_VERTEX_ID)
 280       goto fail;
 281
 282    if (!draw->render->allocate_vertices( draw->render,
 283                                          (ushort)feme->translate->key.output_stride,
 284                                          (ushort)count ))
 285       goto fail;
 286
 287    hw_verts = draw->render->map_vertices( draw->render );
 288    if (!hw_verts)
 289       goto fail;
 290
 291    /* Single routine to fetch vertices and emit HW verts.
 292     */
 293    feme->translate->run( feme->translate,
 294                          start,
 295                          count,
 296                          draw->instance_id,
 297                          hw_verts );
 298
 299    if (0) {
 300       unsigned i;
 301       for (i = 0; i < count; i++) {
 302          debug_printf("\n\nvertex %d:\n", i);
 303          draw_dump_emitted_vertex( feme->vinfo,
 304                                    (const uint8_t *)hw_verts + feme->vinfo->size * 4 * i );
 305       }
 306    }
 307
 308    draw->render->unmap_vertices( draw->render, 0, count - 1 );
 309
 310    /* XXX: Draw arrays path to avoid re-emitting index list again and
 311     * again.
 312     */
 313    draw->render->draw_arrays( draw->render, 0, count );
 314
 315    /* Done -- that was easy, wasn't it:
 316     */
 317    draw->render->release_vertices( draw->render );
 318    return;
 319
 320 fail:
 321    assert(0);
 322    return;
 323 }
 324
 325
 326 static boolean fetch_emit_run_linear_elts( struct draw_pt_middle_end *middle,
 327                                         unsigned start,
 328                                         unsigned count,
 329                                         const ushort *draw_elts,
 330                                         unsigned draw_count,
 331                                         unsigned prim_flags )
 332 {
 333    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 334    struct draw_context *draw = feme->draw;
 335    void *hw_verts;
 336
 337    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 338     */
 339    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 340
 341    if (count >= UNDEFINED_VERTEX_ID)
 342       return FALSE;
 343
 344    if (!draw->render->allocate_vertices( draw->render,
 345                                          (ushort)feme->translate->key.output_stride,
 346                                          (ushort)count ))
 347       return FALSE;
 348
 349    hw_verts = draw->render->map_vertices( draw->render );
 350    if (!hw_verts)
 351       return FALSE;
 352
 353    /* Single routine to fetch vertices and emit HW verts.
 354     */
 355    feme->translate->run( feme->translate,
 356                          start,
 357                          count,
 358                          draw->instance_id,
 359                          hw_verts );
 360
 361    draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
 362
 363    /* XXX: Draw arrays path to avoid re-emitting index list again and
 364     * again.
 365     */
 366    draw->render->draw_elements( draw->render,
 367                                 draw_elts,
 368                                 draw_count );
 369
 370    /* Done -- that was easy, wasn't it:
 371     */
 372    draw->render->release_vertices( draw->render );
 373
 374    return TRUE;
 375 }
 376
 377
 378
 379
 380 static void fetch_emit_finish( struct draw_pt_middle_end *middle )
 381 {
 382    /* nothing to do */
 383 }
 384
 385 static void fetch_emit_destroy( struct draw_pt_middle_end *middle )
 386 {
 387    struct fetch_emit_middle_end *feme = (struct fetch_emit_middle_end *)middle;
 388
 389    if (feme->cache)
 390       translate_cache_destroy(feme->cache);
 391
 392    FREE(middle);
 393 }
 394
 395
 396 struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw )
 397 {
 398    struct fetch_emit_middle_end *fetch_emit = CALLOC_STRUCT( fetch_emit_middle_end );
 399    if (fetch_emit == NULL)
 400       return NULL;
 401
 402    fetch_emit->cache = translate_cache_create();
 403    if (!fetch_emit->cache) {
 404       FREE(fetch_emit);
 405       return NULL;
 406    }
 407
 408    fetch_emit->base.prepare    = fetch_emit_prepare;
 409    fetch_emit->base.run        = fetch_emit_run;
 410    fetch_emit->base.run_linear = fetch_emit_run_linear;
 411    fetch_emit->base.run_linear_elts = fetch_emit_run_linear_elts;
 412    fetch_emit->base.finish     = fetch_emit_finish;
 413    fetch_emit->base.destroy    = fetch_emit_destroy;
 414
 415    fetch_emit->draw = draw;
 416
 417    return &fetch_emit->base;
 418 }
 419