src/gallium/auxiliary/draw/draw_vs.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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 VMWARE 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 <keithw@vmware.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_VIEWPORT_INDEX)
  89             vs->viewport_index_output = i;
  90          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
  91             debug_assert(vs->info.output_semantic_index[i] <
  92                          PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
  93             vs->clipdistance_output[vs->info.output_semantic_index[i]] = i;
  94          } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CULLDIST) {
  95             debug_assert(vs->info.output_semantic_index[i] <
  96                          PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
  97             vs->culldistance_output[vs->info.output_semantic_index[i]] = i;
  98          }
  99       }
 100       if (!found_clipvertex)
 101          vs->clipvertex_output = vs->position_output;
 102    }
 103
 104    assert(vs);
 105    return vs;
 106 }
 107
 108
 109 void
 110 draw_bind_vertex_shader(struct draw_context *draw,
 111                         struct draw_vertex_shader *dvs)
 112 {
 113    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 114
 115    if (dvs)
 116    {
 117       draw->vs.vertex_shader = dvs;
 118       draw->vs.num_vs_outputs = dvs->info.num_outputs;
 119       draw->vs.position_output = dvs->position_output;
 120       draw->vs.edgeflag_output = dvs->edgeflag_output;
 121       draw->vs.clipvertex_output = dvs->clipvertex_output;
 122       draw->vs.clipdistance_output[0] = dvs->clipdistance_output[0];
 123       draw->vs.clipdistance_output[1] = dvs->clipdistance_output[1];
 124       dvs->prepare( dvs, draw );
 125       draw_update_clip_flags(draw);
 126       draw_update_viewport_flags(draw);
 127    }
 128    else {
 129       draw->vs.vertex_shader = NULL;
 130       draw->vs.num_vs_outputs = 0;
 131    }
 132 }
 133
 134
 135 void
 136 draw_delete_vertex_shader(struct draw_context *draw,
 137                           struct draw_vertex_shader *dvs)
 138 {
 139    unsigned i;
 140
 141    for (i = 0; i < dvs->nr_variants; i++)
 142       dvs->variant[i]->destroy( dvs->variant[i] );
 143
 144    dvs->nr_variants = 0;
 145
 146    dvs->delete( dvs );
 147 }
 148
 149
 150
 151 boolean
 152 draw_vs_init( struct draw_context *draw )
 153 {
 154    draw->dump_vs = debug_get_option_gallium_dump_vs();
 155
 156    if (!draw->llvm) {
 157       draw->vs.tgsi.machine = tgsi_exec_machine_create();
 158       if (!draw->vs.tgsi.machine)
 159          return FALSE;
 160    }
 161
 162    draw->vs.emit_cache = translate_cache_create();
 163    if (!draw->vs.emit_cache)
 164       return FALSE;
 165
 166    draw->vs.fetch_cache = translate_cache_create();
 167    if (!draw->vs.fetch_cache)
 168       return FALSE;
 169
 170    return TRUE;
 171 }
 172
 173 void
 174 draw_vs_destroy( struct draw_context *draw )
 175 {
 176    if (draw->vs.fetch_cache)
 177       translate_cache_destroy(draw->vs.fetch_cache);
 178
 179    if (draw->vs.emit_cache)
 180       translate_cache_destroy(draw->vs.emit_cache);
 181
 182    if (!draw->llvm)
 183       tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
 184 }
 185
 186
 187 struct draw_vs_variant *
 188 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
 189                         const struct draw_vs_variant_key *key )
 190 {
 191    struct draw_vs_variant *variant;
 192    unsigned i;
 193
 194    /* Lookup existing variant:
 195     */
 196    for (i = 0; i < vs->nr_variants; i++)
 197       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
 198          return vs->variant[i];
 199
 200    /* Else have to create a new one:
 201     */
 202    variant = vs->create_variant( vs, key );
 203    if (!variant)
 204       return NULL;
 205
 206    /* Add it to our list, could be smarter:
 207     */
 208    if (vs->nr_variants < Elements(vs->variant)) {
 209       vs->variant[vs->nr_variants++] = variant;
 210    }
 211    else {
 212       vs->last_variant++;
 213       vs->last_variant %= Elements(vs->variant);
 214       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
 215       vs->variant[vs->last_variant] = variant;
 216    }
 217
 218    /* Done
 219     */
 220    return variant;
 221 }
 222
 223
 224 struct translate *
 225 draw_vs_get_fetch( struct draw_context *draw,
 226                    struct translate_key *key )
 227 {
 228    if (!draw->vs.fetch ||
 229        translate_key_compare(&draw->vs.fetch->key, key) != 0)
 230    {
 231       translate_key_sanitize(key);
 232       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
 233    }
 234
 235    return draw->vs.fetch;
 236 }
 237
 238 struct translate *
 239 draw_vs_get_emit( struct draw_context *draw,
 240                   struct translate_key *key )
 241 {
 242    if (!draw->vs.emit ||
 243        translate_key_compare(&draw->vs.emit->key, key) != 0)
 244    {
 245       translate_key_sanitize(key);
 246       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
 247    }
 248
 249    return draw->vs.emit;
 250 }
 251
 252 void
 253 draw_vs_attach_so(struct draw_vertex_shader *dvs,
 254                   const struct pipe_stream_output_info *info)
 255 {
 256    dvs->state.stream_output = *info;
 257 }
 258
 259 void
 260 draw_vs_reset_so(struct draw_vertex_shader *dvs)
 261 {
 262    memset(&dvs->state.stream_output, 0, sizeof(dvs->state.stream_output));
 263 }