src/gallium/drivers/softpipe/sp_state_sampler.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 /* Authors:
  29  *  Brian Paul
  30  */
  31
  32 #include "util/u_memory.h"
  33 #include "util/u_inlines.h"
  34
  35 #include "draw/draw_context.h"
  36 #include "draw/draw_context.h"
  37
  38 #include "sp_context.h"
  39 #include "sp_state.h"
  40 #include "sp_texture.h"
  41 #include "sp_tex_sample.h"
  42 #include "sp_tex_tile_cache.h"
  43
  44
  45 struct sp_sampler {
  46    struct pipe_sampler_state base;
  47    struct sp_sampler_varient *varients;
  48    struct sp_sampler_varient *current;
  49 };
  50
  51 static struct sp_sampler *sp_sampler( struct pipe_sampler_state *sampler )
  52 {
  53    return (struct sp_sampler *)sampler;
  54 }
  55
  56
  57 static void *
  58 softpipe_create_sampler_state(struct pipe_context *pipe,
  59                               const struct pipe_sampler_state *sampler)
  60 {
  61    struct sp_sampler *sp_sampler = CALLOC_STRUCT(sp_sampler);
  62
  63    sp_sampler->base = *sampler;
  64    sp_sampler->varients = NULL;
  65
  66    return (void *)sp_sampler;
  67 }
  68
  69
  70 static void
  71 softpipe_bind_sampler_states(struct pipe_context *pipe,
  72                              unsigned num, void **sampler)
  73 {
  74    struct softpipe_context *softpipe = softpipe_context(pipe);
  75    unsigned i;
  76
  77    assert(num <= PIPE_MAX_SAMPLERS);
  78
  79    /* Check for no-op */
  80    if (num == softpipe->num_samplers &&
  81        !memcmp(softpipe->sampler, sampler, num * sizeof(void *)))
  82       return;
  83
  84    draw_flush(softpipe->draw);
  85
  86    for (i = 0; i < num; ++i)
  87       softpipe->sampler[i] = sampler[i];
  88    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
  89       softpipe->sampler[i] = NULL;
  90
  91    softpipe->num_samplers = num;
  92
  93    softpipe->dirty |= SP_NEW_SAMPLER;
  94 }
  95
  96
  97 static void
  98 softpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
  99                                     unsigned num_samplers,
 100                                     void **samplers)
 101 {
 102    struct softpipe_context *softpipe = softpipe_context(pipe);
 103    unsigned i;
 104
 105    assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);
 106
 107    /* Check for no-op */
 108    if (num_samplers == softpipe->num_vertex_samplers &&
 109        !memcmp(softpipe->vertex_samplers, samplers, num_samplers * sizeof(void *)))
 110       return;
 111
 112    draw_flush(softpipe->draw);
 113
 114    for (i = 0; i < num_samplers; ++i)
 115       softpipe->vertex_samplers[i] = samplers[i];
 116    for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 117       softpipe->vertex_samplers[i] = NULL;
 118
 119    softpipe->num_vertex_samplers = num_samplers;
 120
 121    draw_set_samplers(softpipe->draw,
 122                      softpipe->vertex_samplers,
 123                      softpipe->num_vertex_samplers);
 124
 125    softpipe->dirty |= SP_NEW_SAMPLER;
 126 }
 127
 128 static void
 129 softpipe_bind_geometry_sampler_states(struct pipe_context *pipe,
 130                                       unsigned num_samplers,
 131                                       void **samplers)
 132 {
 133    struct softpipe_context *softpipe = softpipe_context(pipe);
 134    unsigned i;
 135
 136    assert(num_samplers <= PIPE_MAX_GEOMETRY_SAMPLERS);
 137
 138    /* Check for no-op */
 139    if (num_samplers == softpipe->num_geometry_samplers &&
 140        !memcmp(softpipe->geometry_samplers, samplers, num_samplers * sizeof(void *)))
 141       return;
 142
 143    draw_flush(softpipe->draw);
 144
 145    for (i = 0; i < num_samplers; ++i)
 146       softpipe->geometry_samplers[i] = samplers[i];
 147    for (i = num_samplers; i < PIPE_MAX_GEOMETRY_SAMPLERS; ++i)
 148       softpipe->geometry_samplers[i] = NULL;
 149
 150    softpipe->num_geometry_samplers = num_samplers;
 151
 152    softpipe->dirty |= SP_NEW_SAMPLER;
 153 }
 154
 155
 156 static struct pipe_sampler_view *
 157 softpipe_create_sampler_view(struct pipe_context *pipe,
 158                              struct pipe_resource *resource,
 159                              const struct pipe_sampler_view *templ)
 160 {
 161    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 162
 163    if (view) {
 164       *view = *templ;
 165       view->reference.count = 1;
 166       view->texture = NULL;
 167       pipe_resource_reference(&view->texture, resource);
 168       view->context = pipe;
 169    }
 170
 171    return view;
 172 }
 173
 174
 175 static void
 176 softpipe_sampler_view_destroy(struct pipe_context *pipe,
 177                               struct pipe_sampler_view *view)
 178 {
 179    pipe_resource_reference(&view->texture, NULL);
 180    FREE(view);
 181 }
 182
 183
 184 static void
 185 softpipe_set_sampler_views(struct pipe_context *pipe,
 186                            unsigned num,
 187                            struct pipe_sampler_view **views)
 188 {
 189    struct softpipe_context *softpipe = softpipe_context(pipe);
 190    uint i;
 191
 192    assert(num <= PIPE_MAX_SAMPLERS);
 193
 194    /* Check for no-op */
 195    if (num == softpipe->num_sampler_views &&
 196        !memcmp(softpipe->sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 197       return;
 198
 199    draw_flush(softpipe->draw);
 200
 201    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 202       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 203
 204       pipe_sampler_view_reference(&softpipe->sampler_views[i], view);
 205       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[i], view);
 206    }
 207
 208    softpipe->num_sampler_views = num;
 209
 210    softpipe->dirty |= SP_NEW_TEXTURE;
 211 }
 212
 213
 214 static void
 215 softpipe_set_vertex_sampler_views(struct pipe_context *pipe,
 216                                   unsigned num,
 217                                   struct pipe_sampler_view **views)
 218 {
 219    struct softpipe_context *softpipe = softpipe_context(pipe);
 220    uint i;
 221
 222    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 223
 224    /* Check for no-op */
 225    if (num == softpipe->num_vertex_sampler_views &&
 226        !memcmp(softpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 227       return;
 228    }
 229
 230    draw_flush(softpipe->draw);
 231
 232    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 233       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 234
 235       pipe_sampler_view_reference(&softpipe->vertex_sampler_views[i], view);
 236       sp_tex_tile_cache_set_sampler_view(softpipe->vertex_tex_cache[i], view);
 237    }
 238
 239    softpipe->num_vertex_sampler_views = num;
 240
 241    draw_set_sampler_views(softpipe->draw,
 242                           softpipe->vertex_sampler_views,
 243                           softpipe->num_vertex_sampler_views);
 244
 245    softpipe->dirty |= SP_NEW_TEXTURE;
 246 }
 247
 248
 249 static void
 250 softpipe_set_geometry_sampler_views(struct pipe_context *pipe,
 251                                     unsigned num,
 252                                     struct pipe_sampler_view **views)
 253 {
 254    struct softpipe_context *softpipe = softpipe_context(pipe);
 255    uint i;
 256
 257    assert(num <= PIPE_MAX_GEOMETRY_SAMPLERS);
 258
 259    /* Check for no-op */
 260    if (num == softpipe->num_geometry_sampler_views &&
 261        !memcmp(softpipe->geometry_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 262       return;
 263    }
 264
 265    draw_flush(softpipe->draw);
 266
 267    for (i = 0; i < PIPE_MAX_GEOMETRY_SAMPLERS; i++) {
 268       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 269
 270       pipe_sampler_view_reference(&softpipe->geometry_sampler_views[i], view);
 271       sp_tex_tile_cache_set_sampler_view(softpipe->geometry_tex_cache[i], view);
 272    }
 273
 274    softpipe->num_geometry_sampler_views = num;
 275
 276    softpipe->dirty |= SP_NEW_TEXTURE;
 277 }
 278
 279
 280 /**
 281  * Find/create an sp_sampler_varient object for sampling the given texture,
 282  * sampler and tex unit.
 283  *
 284  * Note that the tex unit is significant.  We can't re-use a sampler
 285  * varient for multiple texture units because the sampler varient contains
 286  * the texture object pointer.  If the texture object pointer were stored
 287  * somewhere outside the sampler varient, we could re-use samplers for
 288  * multiple texture units.
 289  */
 290 static struct sp_sampler_varient *
 291 get_sampler_varient( unsigned unit,
 292                      struct sp_sampler *sampler,
 293                      struct pipe_resource *resource,
 294                      unsigned processor )
 295 {
 296    struct softpipe_resource *sp_texture = softpipe_resource(resource);
 297    struct sp_sampler_varient *v = NULL;
 298    union sp_sampler_key key;
 299
 300    /* if this fails, widen the key.unit field and update this assertion */
 301    assert(PIPE_MAX_SAMPLERS <= 16);
 302
 303    key.bits.target = sp_texture->base.target;
 304    key.bits.is_pot = sp_texture->pot;
 305    key.bits.processor = processor;
 306    key.bits.unit = unit;
 307    key.bits.pad = 0;
 308
 309    if (sampler->current &&
 310        key.value == sampler->current->key.value) {
 311       v = sampler->current;
 312    }
 313
 314    if (v == NULL) {
 315       for (v = sampler->varients; v; v = v->next)
 316          if (v->key.value == key.value)
 317             break;
 318
 319       if (v == NULL) {
 320          v = sp_create_sampler_varient( &sampler->base, key );
 321          v->next = sampler->varients;
 322          sampler->varients = v;
 323       }
 324    }
 325
 326    sampler->current = v;
 327    return v;
 328 }
 329
 330
 331 void
 332 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 333 {
 334    int i;
 335
 336    /* It's a bit hard to build these samplers ahead of time -- don't
 337     * really know which samplers are going to be used for vertex and
 338     * fragment programs.
 339     */
 340    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 341       if (softpipe->vertex_samplers[i]) {
 342          struct pipe_resource *texture = NULL;
 343
 344          if (softpipe->vertex_sampler_views[i]) {
 345             texture = softpipe->vertex_sampler_views[i]->texture;
 346          }
 347
 348          softpipe->tgsi.vert_samplers_list[i] =
 349             get_sampler_varient( i,
 350                                  sp_sampler(softpipe->vertex_samplers[i]),
 351                                  texture,
 352                                  TGSI_PROCESSOR_VERTEX );
 353
 354          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 355                                           softpipe->vertex_tex_cache[i],
 356                                           texture );
 357       }
 358    }
 359
 360    if (softpipe->gs) {
 361       for (i = 0; i <= softpipe->gs->max_sampler; i++) {
 362          if (softpipe->geometry_samplers[i]) {
 363             struct pipe_resource *texture = NULL;
 364
 365             if (softpipe->geometry_sampler_views[i]) {
 366                texture = softpipe->geometry_sampler_views[i]->texture;
 367             }
 368
 369             softpipe->tgsi.geom_samplers_list[i] =
 370                get_sampler_varient(
 371                   i,
 372                   sp_sampler(softpipe->geometry_samplers[i]),
 373                   texture,
 374                   TGSI_PROCESSOR_GEOMETRY );
 375
 376             sp_sampler_varient_bind_texture(
 377                softpipe->tgsi.geom_samplers_list[i],
 378                softpipe->geometry_tex_cache[i],
 379                texture );
 380          }
 381       }
 382    }
 383
 384    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 385       if (softpipe->sampler[i]) {
 386          struct pipe_resource *texture = NULL;
 387
 388          if (softpipe->sampler_views[i]) {
 389             texture = softpipe->sampler_views[i]->texture;
 390          }
 391
 392          softpipe->tgsi.frag_samplers_list[i] =
 393             get_sampler_varient( i,
 394                                  sp_sampler(softpipe->sampler[i]),
 395                                  texture,
 396                                  TGSI_PROCESSOR_FRAGMENT );
 397
 398          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 399                                           softpipe->tex_cache[i],
 400                                           texture );
 401       }
 402    }
 403 }
 404
 405 static void
 406 softpipe_delete_sampler_state(struct pipe_context *pipe,
 407                               void *sampler)
 408 {
 409    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 410    struct sp_sampler_varient *v, *tmp;
 411
 412    for (v = sp_sampler->varients; v; v = tmp) {
 413       tmp = v->next;
 414       sp_sampler_varient_destroy(v);
 415    }
 416
 417    FREE( sampler );
 418 }
 419
 420
 421 void
 422 softpipe_init_sampler_funcs(struct pipe_context *pipe)
 423 {
 424    pipe->create_sampler_state = softpipe_create_sampler_state;
 425    pipe->bind_fragment_sampler_states  = softpipe_bind_sampler_states;
 426    pipe->bind_vertex_sampler_states = softpipe_bind_vertex_sampler_states;
 427    pipe->bind_geometry_sampler_states = softpipe_bind_geometry_sampler_states;
 428    pipe->delete_sampler_state = softpipe_delete_sampler_state;
 429
 430    pipe->set_fragment_sampler_views = softpipe_set_sampler_views;
 431    pipe->set_vertex_sampler_views = softpipe_set_vertex_sampler_views;
 432    pipe->set_geometry_sampler_views = softpipe_set_geometry_sampler_views;
 433
 434    pipe->create_sampler_view = softpipe_create_sampler_view;
 435    pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
 436 }
 437