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