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 #ifdef LLVM_AVAILABLE
  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->ccdistance_output[vs->info.output_semantic_index[i]] = i;
  94          }
  95       }
  96       if (!found_clipvertex)
  97          vs->clipvertex_output = vs->position_output;
  98    }
  99
 100    assert(vs);
 101    return vs;
 102 }
 103
 104
 105 void
 106 draw_bind_vertex_shader(struct draw_context *draw,
 107                         struct draw_vertex_shader *dvs)
 108 {
 109    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 110
 111    if (dvs)
 112    {
 113       draw->vs.vertex_shader = dvs;
 114       draw->vs.num_vs_outputs = dvs->info.num_outputs;
 115       draw->vs.position_output = dvs->position_output;
 116       draw->vs.edgeflag_output = dvs->edgeflag_output;
 117       draw->vs.clipvertex_output = dvs->clipvertex_output;
 118       draw->vs.ccdistance_output[0] = dvs->ccdistance_output[0];
 119       draw->vs.ccdistance_output[1] = dvs->ccdistance_output[1];
 120       dvs->prepare( dvs, draw );
 121       draw_update_clip_flags(draw);
 122       draw_update_viewport_flags(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    if (!draw->llvm) {
 153       draw->vs.tgsi.machine = tgsi_exec_machine_create(PIPE_SHADER_VERTEX);
 154       if (!draw->vs.tgsi.machine)
 155          return FALSE;
 156    }
 157
 158    draw->vs.emit_cache = translate_cache_create();
 159    if (!draw->vs.emit_cache)
 160       return FALSE;
 161
 162    draw->vs.fetch_cache = translate_cache_create();
 163    if (!draw->vs.fetch_cache)
 164       return FALSE;
 165
 166    return TRUE;
 167 }
 168
 169 void
 170 draw_vs_destroy( struct draw_context *draw )
 171 {
 172    if (draw->vs.fetch_cache)
 173       translate_cache_destroy(draw->vs.fetch_cache);
 174
 175    if (draw->vs.emit_cache)
 176       translate_cache_destroy(draw->vs.emit_cache);
 177
 178    if (!draw->llvm)
 179       tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
 180 }
 181
 182
 183 struct draw_vs_variant *
 184 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
 185                         const struct draw_vs_variant_key *key )
 186 {
 187    struct draw_vs_variant *variant;
 188    unsigned i;
 189
 190    /* Lookup existing variant:
 191     */
 192    for (i = 0; i < vs->nr_variants; i++)
 193       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
 194          return vs->variant[i];
 195
 196    /* Else have to create a new one:
 197     */
 198    variant = vs->create_variant( vs, key );
 199    if (!variant)
 200       return NULL;
 201
 202    /* Add it to our list, could be smarter:
 203     */
 204    if (vs->nr_variants < ARRAY_SIZE(vs->variant)) {
 205       vs->variant[vs->nr_variants++] = variant;
 206    }
 207    else {
 208       vs->last_variant++;
 209       vs->last_variant %= ARRAY_SIZE(vs->variant);
 210       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
 211       vs->variant[vs->last_variant] = variant;
 212    }
 213
 214    /* Done
 215     */
 216    return variant;
 217 }
 218
 219
 220 struct translate *
 221 draw_vs_get_fetch( struct draw_context *draw,
 222                    struct translate_key *key )
 223 {
 224    if (!draw->vs.fetch ||
 225        translate_key_compare(&draw->vs.fetch->key, key) != 0)
 226    {
 227       translate_key_sanitize(key);
 228       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
 229    }
 230
 231    return draw->vs.fetch;
 232 }
 233
 234 struct translate *
 235 draw_vs_get_emit( struct draw_context *draw,
 236                   struct translate_key *key )
 237 {
 238    if (!draw->vs.emit ||
 239        translate_key_compare(&draw->vs.emit->key, key) != 0)
 240    {
 241       translate_key_sanitize(key);
 242       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
 243    }
 244
 245    return draw->vs.emit;
 246 }
 247
 248 void
 249 draw_vs_attach_so(struct draw_vertex_shader *dvs,
 250                   const struct pipe_stream_output_info *info)
 251 {
 252    dvs->state.stream_output = *info;
 253 }
 254
 255 void
 256 draw_vs_reset_so(struct draw_vertex_shader *dvs)
 257 {
 258    memset(&dvs->state.stream_output, 0, sizeof(dvs->state.stream_output));
 259 }