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_variant *variants;
  47    struct sp_sampler_variant *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->variants = NULL;
  64
  65    return (void *)sp_sampler;
  66 }
  67
  68
  69 static void
  70 softpipe_bind_fragment_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_fragment_samplers &&
  80        !memcmp(softpipe->fragment_samplers, sampler, num * sizeof(void *)))
  81       return;
  82
  83    draw_flush(softpipe->draw);
  84
  85    for (i = 0; i < num; ++i)
  86       softpipe->fragment_samplers[i] = sampler[i];
  87    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
  88       softpipe->fragment_samplers[i] = NULL;
  89
  90    softpipe->num_fragment_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_fragment_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_fragment_sampler_views &&
 195        !memcmp(softpipe->fragment_sampler_views, views,
 196                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->fragment_sampler_views[i], view);
 205       sp_tex_tile_cache_set_sampler_view(softpipe->fragment_tex_cache[i], view);
 206    }
 207
 208    softpipe->num_fragment_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_variant 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  * variant for multiple texture units because the sampler variant contains
 286  * the texture object pointer.  If the texture object pointer were stored
 287  * somewhere outside the sampler variant, we could re-use samplers for
 288  * multiple texture units.
 289  */
 290 static struct sp_sampler_variant *
 291 get_sampler_variant( unsigned unit,
 292                      struct sp_sampler *sampler,
 293                      struct pipe_sampler_view *view,
 294                      unsigned processor )
 295 {
 296    struct softpipe_resource *sp_texture = softpipe_resource(view->texture);
 297    struct sp_sampler_variant *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.swizzle_r = view->swizzle_r;
 308    key.bits.swizzle_g = view->swizzle_g;
 309    key.bits.swizzle_b = view->swizzle_b;
 310    key.bits.swizzle_a = view->swizzle_a;
 311    key.bits.pad = 0;
 312
 313    if (sampler->current &&
 314        key.value == sampler->current->key.value) {
 315       v = sampler->current;
 316    }
 317
 318    if (v == NULL) {
 319       for (v = sampler->variants; v; v = v->next)
 320          if (v->key.value == key.value)
 321             break;
 322
 323       if (v == NULL) {
 324          v = sp_create_sampler_variant( &sampler->base, key );
 325          v->next = sampler->variants;
 326          sampler->variants = v;
 327       }
 328    }
 329
 330    sampler->current = v;
 331    return v;
 332 }
 333
 334
 335 void
 336 softpipe_reset_sampler_variants(struct softpipe_context *softpipe)
 337 {
 338    int i;
 339
 340    /* It's a bit hard to build these samplers ahead of time -- don't
 341     * really know which samplers are going to be used for vertex and
 342     * fragment programs.
 343     */
 344    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 345       if (softpipe->vertex_samplers[i]) {
 346          softpipe->tgsi.vert_samplers_list[i] =
 347             get_sampler_variant( i,
 348                                  sp_sampler(softpipe->vertex_samplers[i]),
 349                                  softpipe->vertex_sampler_views[i],
 350                                  TGSI_PROCESSOR_VERTEX );
 351
 352          sp_sampler_variant_bind_view( softpipe->tgsi.vert_samplers_list[i],
 353                                        softpipe->vertex_tex_cache[i],
 354                                        softpipe->vertex_sampler_views[i] );
 355       }
 356    }
 357
 358    if (softpipe->gs) {
 359       for (i = 0; i <= softpipe->gs->max_sampler; i++) {
 360          if (softpipe->geometry_samplers[i]) {
 361             softpipe->tgsi.geom_samplers_list[i] =
 362                get_sampler_variant(
 363                   i,
 364                   sp_sampler(softpipe->geometry_samplers[i]),
 365                   softpipe->geometry_sampler_views[i],
 366                   TGSI_PROCESSOR_GEOMETRY );
 367
 368             sp_sampler_variant_bind_view(
 369                softpipe->tgsi.geom_samplers_list[i],
 370                softpipe->geometry_tex_cache[i],
 371                softpipe->geometry_sampler_views[i] );
 372          }
 373       }
 374    }
 375
 376    for (i = 0; i <= softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 377       if (softpipe->fragment_samplers[i]) {
 378          assert(softpipe->fragment_sampler_views[i]->texture);
 379          softpipe->tgsi.frag_samplers_list[i] =
 380             get_sampler_variant( i,
 381                                  sp_sampler(softpipe->fragment_samplers[i]),
 382                                  softpipe->fragment_sampler_views[i],
 383                                  TGSI_PROCESSOR_FRAGMENT );
 384
 385          sp_sampler_variant_bind_view( softpipe->tgsi.frag_samplers_list[i],
 386                                        softpipe->fragment_tex_cache[i],
 387                                        softpipe->fragment_sampler_views[i] );
 388       }
 389    }
 390 }
 391
 392 static void
 393 softpipe_delete_sampler_state(struct pipe_context *pipe,
 394                               void *sampler)
 395 {
 396    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 397    struct sp_sampler_variant *v, *tmp;
 398
 399    for (v = sp_sampler->variants; v; v = tmp) {
 400       tmp = v->next;
 401       sp_sampler_variant_destroy(v);
 402    }
 403
 404    FREE( sampler );
 405 }
 406
 407
 408 void
 409 softpipe_init_sampler_funcs(struct pipe_context *pipe)
 410 {
 411    pipe->create_sampler_state = softpipe_create_sampler_state;
 412    pipe->bind_fragment_sampler_states  = softpipe_bind_fragment_sampler_states;
 413    pipe->bind_vertex_sampler_states = softpipe_bind_vertex_sampler_states;
 414    pipe->bind_geometry_sampler_states = softpipe_bind_geometry_sampler_states;
 415    pipe->delete_sampler_state = softpipe_delete_sampler_state;
 416
 417    pipe->set_fragment_sampler_views = softpipe_set_fragment_sampler_views;
 418    pipe->set_vertex_sampler_views = softpipe_set_vertex_sampler_views;
 419    pipe->set_geometry_sampler_views = softpipe_set_geometry_sampler_views;
 420
 421    pipe->create_sampler_view = softpipe_create_sampler_view;
 422    pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
 423 }
 424