src/gallium/auxiliary/draw/draw_pt_fetch_shade_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
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "draw/draw_context.h"
  37 #include "draw/draw_private.h"
  38 #include "draw/draw_vbuf.h"
  39 #include "draw/draw_vertex.h"
  40 #include "draw/draw_pt.h"
  41 #include "draw/draw_vs.h"
  42
  43
  44 struct fetch_shade_emit;
  45
  46
  47 /* Prototype fetch, shade, emit-hw-verts all in one go.
  48  */
  49 struct fetch_shade_emit {
  50    struct draw_pt_middle_end base;
  51    struct draw_context *draw;
  52
  53
  54    /* Temporaries:
  55     */
  56    const float *constants;
  57    unsigned pitch[PIPE_MAX_ATTRIBS];
  58    const ubyte *src[PIPE_MAX_ATTRIBS];
  59    unsigned prim;
  60
  61    struct draw_vs_variant_key key;
  62    struct draw_vs_variant *active;
  63
  64
  65    const struct vertex_info *vinfo;
  66 };
  67
  68
  69
  70 static void fse_prepare( struct draw_pt_middle_end *middle,
  71                          unsigned prim,
  72                          unsigned opt,
  73                          unsigned *max_vertices )
  74 {
  75    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
  76    struct draw_context *draw = fse->draw;
  77    unsigned num_vs_inputs = draw->vs.vertex_shader->info.num_inputs;
  78    const struct vertex_info *vinfo;
  79    unsigned i;
  80    unsigned nr_vbs = 0;
  81
  82    /* Can't support geometry shader on this path.
  83     */
  84    assert(!draw->gs.geometry_shader);
  85
  86    if (!draw->render->set_primitive( draw->render,
  87                                      prim )) {
  88       assert(0);
  89       return;
  90    }
  91
  92    /* Must do this after set_primitive() above:
  93     */
  94    fse->vinfo = vinfo = draw->render->get_vertex_info(draw->render);
  95
  96
  97    fse->key.output_stride = vinfo->size * 4;
  98    fse->key.nr_outputs = vinfo->num_attribs;
  99    fse->key.nr_inputs = num_vs_inputs;
 100
 101    fse->key.nr_elements = MAX2(fse->key.nr_outputs,     /* outputs - translate to hw format */
 102                                fse->key.nr_inputs);     /* inputs - fetch from api format */
 103
 104    fse->key.viewport = !draw->identity_viewport;
 105    fse->key.clip = draw->clip_xy || draw->clip_z || draw->clip_user;
 106    fse->key.const_vbuffers = 0;
 107
 108    memset(fse->key.element, 0,
 109           fse->key.nr_elements * sizeof(fse->key.element[0]));
 110
 111    for (i = 0; i < num_vs_inputs; i++) {
 112       const struct pipe_vertex_element *src = &draw->pt.vertex_element[i];
 113       fse->key.element[i].in.format = src->src_format;
 114
 115       /* Consider ignoring these, ie make generated programs
 116        * independent of this state:
 117        */
 118       fse->key.element[i].in.buffer = src->vertex_buffer_index;
 119       fse->key.element[i].in.offset = src->src_offset;
 120       nr_vbs = MAX2(nr_vbs, src->vertex_buffer_index + 1);
 121    }
 122
 123    for (i = 0; i < 5 && i < nr_vbs; i++) {
 124       if (draw->pt.vertex_buffer[i].stride == 0)
 125          fse->key.const_vbuffers |= (1<<i);
 126    }
 127
 128    if (0) debug_printf("%s: lookup const_vbuffers: %x\n", __FUNCTION__, fse->key.const_vbuffers);
 129
 130    {
 131       unsigned dst_offset = 0;
 132
 133       for (i = 0; i < vinfo->num_attribs; i++) {
 134          unsigned emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
 135
 136          /* doesn't handle EMIT_OMIT */
 137          assert(emit_sz != 0);
 138
 139          /* The elements in the key correspond to vertex shader output
 140           * numbers, not to positions in the hw vertex description --
 141           * that's handled by the output_offset field.
 142           */
 143          fse->key.element[i].out.format = vinfo->attrib[i].emit;
 144          fse->key.element[i].out.vs_output = vinfo->attrib[i].src_index;
 145          fse->key.element[i].out.offset = dst_offset;
 146
 147          dst_offset += emit_sz;
 148          assert(fse->key.output_stride >= dst_offset);
 149       }
 150    }
 151
 152
 153    fse->active = draw_vs_lookup_variant( draw->vs.vertex_shader,
 154                                          &fse->key );
 155
 156    if (!fse->active) {
 157       assert(0);
 158       return ;
 159    }
 160
 161    if (0) debug_printf("%s: found const_vbuffers: %x\n", __FUNCTION__,
 162                        fse->active->key.const_vbuffers);
 163
 164    /* Now set buffer pointers:
 165     */
 166    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 167       fse->active->set_buffer( fse->active,
 168                                i,
 169                                ((const ubyte *) draw->pt.user.vbuffer[i] +
 170                                 draw->pt.vertex_buffer[i].buffer_offset),
 171                               draw->pt.vertex_buffer[i].stride,
 172                               draw->pt.max_index );
 173    }
 174
 175    *max_vertices = (draw->render->max_vertex_buffer_bytes /
 176                     (vinfo->size * 4));
 177
 178    /* Probably need to do this somewhere (or fix exec shader not to
 179     * need it):
 180     */
 181    if (1) {
 182       struct draw_vertex_shader *vs = draw->vs.vertex_shader;
 183       vs->prepare(vs, draw);
 184    }
 185 }
 186
 187
 188
 189 static void fse_run_linear( struct draw_pt_middle_end *middle,
 190                             unsigned start,
 191                             unsigned count,
 192                             unsigned prim_flags )
 193 {
 194    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
 195    struct draw_context *draw = fse->draw;
 196    char *hw_verts;
 197
 198    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 199     */
 200    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 201
 202    if (!draw->render->allocate_vertices( draw->render,
 203                                          (ushort)fse->key.output_stride,
 204                                          (ushort)count ))
 205       goto fail;
 206
 207    hw_verts = draw->render->map_vertices( draw->render );
 208    if (!hw_verts)
 209       goto fail;
 210
 211    /* Single routine to fetch vertices, run shader and emit HW verts.
 212     * Clipping is done elsewhere -- either by the API or on hardware,
 213     * or for some other reason not required...
 214     */
 215    fse->active->run_linear( fse->active,
 216                             start, count,
 217                             hw_verts );
 218
 219
 220    if (0) {
 221       unsigned i;
 222       for (i = 0; i < count; i++) {
 223          debug_printf("\n\n%s vertex %d: (stride %d, offset %d)\n", __FUNCTION__, i,
 224                       fse->key.output_stride,
 225                       fse->key.output_stride * i);
 226
 227          draw_dump_emitted_vertex( fse->vinfo,
 228                                    (const uint8_t *)hw_verts + fse->key.output_stride * i );
 229       }
 230    }
 231
 232    draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
 233
 234    /* Draw arrays path to avoid re-emitting index list again and
 235     * again.
 236     */
 237    draw->render->draw_arrays( draw->render,
 238                               0,
 239                               count );
 240
 241
 242    draw->render->release_vertices( draw->render );
 243
 244    return;
 245
 246 fail:
 247    assert(0);
 248    return;
 249 }
 250
 251
 252 static void
 253 fse_run(struct draw_pt_middle_end *middle,
 254         const unsigned *fetch_elts,
 255         unsigned fetch_count,
 256         const ushort *draw_elts,
 257         unsigned draw_count,
 258         unsigned prim_flags )
 259 {
 260    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
 261    struct draw_context *draw = fse->draw;
 262    void *hw_verts;
 263
 264    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 265     */
 266    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 267
 268    if (!draw->render->allocate_vertices( draw->render,
 269                                          (ushort)fse->key.output_stride,
 270                                          (ushort)fetch_count ))
 271       goto fail;
 272
 273    hw_verts = draw->render->map_vertices( draw->render );
 274    if (!hw_verts)
 275       goto fail;
 276
 277
 278    /* Single routine to fetch vertices, run shader and emit HW verts.
 279     */
 280    fse->active->run_elts( fse->active,
 281                           fetch_elts,
 282                           fetch_count,
 283                           hw_verts );
 284
 285
 286    if (0) {
 287       unsigned i;
 288       for (i = 0; i < fetch_count; i++) {
 289          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 290          draw_dump_emitted_vertex( fse->vinfo,
 291                                    (const uint8_t *)hw_verts +
 292                                    fse->key.output_stride * i );
 293       }
 294    }
 295
 296    draw->render->unmap_vertices( draw->render, 0, (ushort)(fetch_count - 1) );
 297
 298    draw->render->draw_elements( draw->render,
 299                                 draw_elts,
 300                                 draw_count );
 301
 302
 303    draw->render->release_vertices( draw->render );
 304    return;
 305
 306 fail:
 307    assert(0);
 308    return;
 309 }
 310
 311
 312
 313 static boolean fse_run_linear_elts( struct draw_pt_middle_end *middle,
 314                                  unsigned start,
 315                                  unsigned count,
 316                                  const ushort *draw_elts,
 317                                  unsigned draw_count,
 318                                  unsigned prim_flags )
 319 {
 320    struct fetch_shade_emit *fse = (struct fetch_shade_emit *)middle;
 321    struct draw_context *draw = fse->draw;
 322    char *hw_verts;
 323
 324    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 325     */
 326    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 327
 328    if (!draw->render->allocate_vertices( draw->render,
 329                                          (ushort)fse->key.output_stride,
 330                                          (ushort)count ))
 331       return FALSE;
 332
 333    hw_verts = draw->render->map_vertices( draw->render );
 334    if (!hw_verts)
 335       return FALSE;
 336
 337    /* Single routine to fetch vertices, run shader and emit HW verts.
 338     * Clipping is done elsewhere -- either by the API or on hardware,
 339     * or for some other reason not required...
 340     */
 341    fse->active->run_linear( fse->active,
 342                             start, count,
 343                             hw_verts );
 344
 345
 346    draw->render->draw_elements( draw->render,
 347                                 draw_elts,
 348                                 draw_count );
 349
 350
 351    draw->render->unmap_vertices( draw->render, 0, (ushort)(count - 1) );
 352
 353    draw->render->release_vertices( draw->render );
 354
 355    return TRUE;
 356 }
 357
 358
 359
 360 static void fse_finish( struct draw_pt_middle_end *middle )
 361 {
 362 }
 363
 364
 365 static void
 366 fse_destroy( struct draw_pt_middle_end *middle )
 367 {
 368    FREE(middle);
 369 }
 370
 371 struct draw_pt_middle_end *draw_pt_middle_fse( struct draw_context *draw )
 372 {
 373    struct fetch_shade_emit *fse = CALLOC_STRUCT(fetch_shade_emit);
 374    if (!fse)
 375       return NULL;
 376
 377    fse->base.prepare = fse_prepare;
 378    fse->base.run = fse_run;
 379    fse->base.run_linear = fse_run_linear;
 380    fse->base.run_linear_elts = fse_run_linear_elts;
 381    fse->base.finish = fse_finish;
 382    fse->base.destroy = fse_destroy;
 383    fse->draw = draw;
 384
 385    return &fse->base;
 386 }