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