src/gallium/auxiliary/draw/draw_vs.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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36
  37 #include "pipe/p_shader_tokens.h"
  38
  39 #include "draw_private.h"
  40 #include "draw_context.h"
  41 #include "draw_vs.h"
  42
  43 #include "translate/translate.h"
  44 #include "translate/translate_cache.h"
  45
  46 #include "tgsi/tgsi_dump.h"
  47 #include "tgsi/tgsi_exec.h"
  48
  49 DEBUG_GET_ONCE_BOOL_OPTION(gallium_dump_vs, "GALLIUM_DUMP_VS", FALSE)
  50
  51
  52 struct draw_vertex_shader *
  53 draw_create_vertex_shader(struct draw_context *draw,
  54                           const struct pipe_shader_state *shader)
  55 {
  56    struct draw_vertex_shader *vs = NULL;
  57
  58    if (draw->dump_vs) {
  59       tgsi_dump(shader->tokens, 0);
  60    }
  61
  62 #if HAVE_LLVM
  63    if (draw->pt.middle.llvm) {
  64       vs = draw_create_vs_llvm(draw, shader);
  65    }
  66 #endif
  67
  68    if (!vs) {
  69       vs = draw_create_vs_exec( draw, shader );
  70    }
  71
  72    if (vs)
  73    {
  74       uint i;
  75       bool found_clipvertex = FALSE;
  76       vs->position_output = -1;
  77       for (i = 0; i < vs->info.num_outputs; i++) {
  78          if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
  79              vs->info.output_semantic_index[i] == 0)
  80             vs->position_output = i;
  81          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_EDGEFLAG &&
  82              vs->info.output_semantic_index[i] == 0)
  83             vs->edgeflag_output = i;
  84          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPVERTEX &&
  85                   vs->info.output_semantic_index[i] == 0) {
  86             found_clipvertex = TRUE;
  87             vs->clipvertex_output = i;
  88          } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
  89             if (vs->info.output_semantic_index[i] == 0)
  90                vs->clipdistance_output[0] = i;
  91             else
  92                vs->clipdistance_output[1] = i;
  93          }
  94       }
  95       if (!found_clipvertex)
  96          vs->clipvertex_output = vs->position_output;
  97    }
  98
  99    assert(vs);
 100    return vs;
 101 }
 102
 103
 104 void
 105 draw_bind_vertex_shader(struct draw_context *draw,
 106                         struct draw_vertex_shader *dvs)
 107 {
 108    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 109
 110    if (dvs)
 111    {
 112       draw->vs.vertex_shader = dvs;
 113       draw->vs.num_vs_outputs = dvs->info.num_outputs;
 114       draw->vs.position_output = dvs->position_output;
 115       draw->vs.edgeflag_output = dvs->edgeflag_output;
 116       draw->vs.clipvertex_output = dvs->clipvertex_output;
 117       draw->vs.clipdistance_output[0] = dvs->clipdistance_output[0];
 118       draw->vs.clipdistance_output[1] = dvs->clipdistance_output[1];
 119       dvs->prepare( dvs, draw );
 120    }
 121    else {
 122       draw->vs.vertex_shader = NULL;
 123       draw->vs.num_vs_outputs = 0;
 124    }
 125 }
 126
 127
 128 void
 129 draw_delete_vertex_shader(struct draw_context *draw,
 130                           struct draw_vertex_shader *dvs)
 131 {
 132    unsigned i;
 133
 134    for (i = 0; i < dvs->nr_variants; i++)
 135       dvs->variant[i]->destroy( dvs->variant[i] );
 136
 137    dvs->nr_variants = 0;
 138
 139    dvs->delete( dvs );
 140 }
 141
 142
 143
 144 boolean
 145 draw_vs_init( struct draw_context *draw )
 146 {
 147    draw->dump_vs = debug_get_option_gallium_dump_vs();
 148
 149    draw->vs.tgsi.machine = tgsi_exec_machine_create();
 150    if (!draw->vs.tgsi.machine)
 151       return FALSE;
 152
 153    draw->vs.emit_cache = translate_cache_create();
 154    if (!draw->vs.emit_cache)
 155       return FALSE;
 156
 157    draw->vs.fetch_cache = translate_cache_create();
 158    if (!draw->vs.fetch_cache)
 159       return FALSE;
 160
 161    return TRUE;
 162 }
 163
 164 void
 165 draw_vs_destroy( struct draw_context *draw )
 166 {
 167    if (draw->vs.fetch_cache)
 168       translate_cache_destroy(draw->vs.fetch_cache);
 169
 170    if (draw->vs.emit_cache)
 171       translate_cache_destroy(draw->vs.emit_cache);
 172
 173    tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
 174 }
 175
 176
 177 struct draw_vs_variant *
 178 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
 179                         const struct draw_vs_variant_key *key )
 180 {
 181    struct draw_vs_variant *variant;
 182    unsigned i;
 183
 184    /* Lookup existing variant:
 185     */
 186    for (i = 0; i < vs->nr_variants; i++)
 187       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
 188          return vs->variant[i];
 189
 190    /* Else have to create a new one:
 191     */
 192    variant = vs->create_variant( vs, key );
 193    if (variant == NULL)
 194       return NULL;
 195
 196    /* Add it to our list, could be smarter:
 197     */
 198    if (vs->nr_variants < Elements(vs->variant)) {
 199       vs->variant[vs->nr_variants++] = variant;
 200    }
 201    else {
 202       vs->last_variant++;
 203       vs->last_variant %= Elements(vs->variant);
 204       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
 205       vs->variant[vs->last_variant] = variant;
 206    }
 207
 208    /* Done
 209     */
 210    return variant;
 211 }
 212
 213
 214 struct translate *
 215 draw_vs_get_fetch( struct draw_context *draw,
 216                    struct translate_key *key )
 217 {
 218    if (!draw->vs.fetch ||
 219        translate_key_compare(&draw->vs.fetch->key, key) != 0)
 220    {
 221       translate_key_sanitize(key);
 222       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
 223    }
 224
 225    return draw->vs.fetch;
 226 }
 227
 228 struct translate *
 229 draw_vs_get_emit( struct draw_context *draw,
 230                   struct translate_key *key )
 231 {
 232    if (!draw->vs.emit ||
 233        translate_key_compare(&draw->vs.emit->key, key) != 0)
 234    {
 235       translate_key_sanitize(key);
 236       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
 237    }
 238
 239    return draw->vs.emit;
 240 }
 241
 242 void
 243 draw_vs_attach_so(struct draw_vertex_shader *dvs,
 244                   const struct pipe_stream_output_info *info)
 245 {
 246    dvs->state.stream_output = *info;
 247 }
 248
 249 void
 250 draw_vs_reset_so(struct draw_vertex_shader *dvs)
 251 {
 252    memset(&dvs->state.stream_output, 0, sizeof(dvs->state.stream_output));
 253 }