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 void draw_vs_set_viewport( struct draw_context *draw,
  53                            const struct pipe_viewport_state *viewport )
  54 {
  55 }
  56
  57
  58
  59 struct draw_vertex_shader *
  60 draw_create_vertex_shader(struct draw_context *draw,
  61                           const struct pipe_shader_state *shader)
  62 {
  63    struct draw_vertex_shader *vs = NULL;
  64
  65    if (draw->dump_vs) {
  66       tgsi_dump(shader->tokens, 0);
  67    }
  68
  69 #if HAVE_LLVM
  70    if (draw->pt.middle.llvm) {
  71       vs = draw_create_vs_llvm(draw, shader);
  72    }
  73 #endif
  74
  75    if (!vs) {
  76       vs = draw_create_vs_exec( draw, shader );
  77    }
  78
  79    if (vs)
  80    {
  81       uint i;
  82       bool found_clipvertex = FALSE;
  83       vs->position_output = -1;
  84       for (i = 0; i < vs->info.num_outputs; i++) {
  85          if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
  86              vs->info.output_semantic_index[i] == 0)
  87             vs->position_output = i;
  88          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_EDGEFLAG &&
  89              vs->info.output_semantic_index[i] == 0)
  90             vs->edgeflag_output = i;
  91          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPVERTEX &&
  92                   vs->info.output_semantic_index[i] == 0) {
  93             found_clipvertex = TRUE;
  94             vs->clipvertex_output = i;
  95          } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
  96             if (vs->info.output_semantic_index[i] == 0)
  97                vs->clipdistance_output[0] = i;
  98             else
  99                vs->clipdistance_output[1] = i;
 100          }
 101       }
 102       if (!found_clipvertex)
 103          vs->clipvertex_output = vs->position_output;
 104    }
 105
 106    assert(vs);
 107    return vs;
 108 }
 109
 110
 111 void
 112 draw_bind_vertex_shader(struct draw_context *draw,
 113                         struct draw_vertex_shader *dvs)
 114 {
 115    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 116
 117    if (dvs)
 118    {
 119       draw->vs.vertex_shader = dvs;
 120       draw->vs.num_vs_outputs = dvs->info.num_outputs;
 121       draw->vs.position_output = dvs->position_output;
 122       draw->vs.edgeflag_output = dvs->edgeflag_output;
 123       draw->vs.clipvertex_output = dvs->clipvertex_output;
 124       draw->vs.clipdistance_output[0] = dvs->clipdistance_output[0];
 125       draw->vs.clipdistance_output[1] = dvs->clipdistance_output[1];
 126       dvs->prepare( dvs, 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    draw->vs.tgsi.machine = tgsi_exec_machine_create();
 157    if (!draw->vs.tgsi.machine)
 158       return FALSE;
 159
 160    draw->vs.emit_cache = translate_cache_create();
 161    if (!draw->vs.emit_cache)
 162       return FALSE;
 163
 164    draw->vs.fetch_cache = translate_cache_create();
 165    if (!draw->vs.fetch_cache)
 166       return FALSE;
 167
 168    return TRUE;
 169 }
 170
 171 void
 172 draw_vs_destroy( struct draw_context *draw )
 173 {
 174    if (draw->vs.fetch_cache)
 175       translate_cache_destroy(draw->vs.fetch_cache);
 176
 177    if (draw->vs.emit_cache)
 178       translate_cache_destroy(draw->vs.emit_cache);
 179
 180    tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
 181 }
 182
 183
 184 struct draw_vs_variant *
 185 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
 186                         const struct draw_vs_variant_key *key )
 187 {
 188    struct draw_vs_variant *variant;
 189    unsigned i;
 190
 191    /* Lookup existing variant:
 192     */
 193    for (i = 0; i < vs->nr_variants; i++)
 194       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
 195          return vs->variant[i];
 196
 197    /* Else have to create a new one:
 198     */
 199    variant = vs->create_variant( vs, key );
 200    if (variant == NULL)
 201       return NULL;
 202
 203    /* Add it to our list, could be smarter:
 204     */
 205    if (vs->nr_variants < Elements(vs->variant)) {
 206       vs->variant[vs->nr_variants++] = variant;
 207    }
 208    else {
 209       vs->last_variant++;
 210       vs->last_variant %= Elements(vs->variant);
 211       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
 212       vs->variant[vs->last_variant] = variant;
 213    }
 214
 215    /* Done
 216     */
 217    return variant;
 218 }
 219
 220
 221 struct translate *
 222 draw_vs_get_fetch( struct draw_context *draw,
 223                    struct translate_key *key )
 224 {
 225    if (!draw->vs.fetch ||
 226        translate_key_compare(&draw->vs.fetch->key, key) != 0)
 227    {
 228       translate_key_sanitize(key);
 229       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
 230    }
 231
 232    return draw->vs.fetch;
 233 }
 234
 235 struct translate *
 236 draw_vs_get_emit( struct draw_context *draw,
 237                   struct translate_key *key )
 238 {
 239    if (!draw->vs.emit ||
 240        translate_key_compare(&draw->vs.emit->key, key) != 0)
 241    {
 242       translate_key_sanitize(key);
 243       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
 244    }
 245
 246    return draw->vs.emit;
 247 }