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_samplers[PIPE_SHADER_FRAGMENT] &&
  80        !memcmp(softpipe->samplers[PIPE_SHADER_FRAGMENT], sampler, num * sizeof(void *)))
  81       return;
  82
  83    draw_flush(softpipe->draw);
  84
  85    for (i = 0; i < num; ++i)
  86       softpipe->samplers[PIPE_SHADER_FRAGMENT][i] = sampler[i];
  87    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
  88       softpipe->samplers[PIPE_SHADER_FRAGMENT][i] = NULL;
  89
  90    softpipe->num_samplers[PIPE_SHADER_FRAGMENT] = 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_samplers[PIPE_SHADER_VERTEX] &&
 108        !memcmp(softpipe->samplers[PIPE_SHADER_VERTEX], samplers, num_samplers * sizeof(void *)))
 109       return;
 110
 111    draw_flush(softpipe->draw);
 112
 113    for (i = 0; i < num_samplers; ++i)
 114       softpipe->samplers[PIPE_SHADER_VERTEX][i] = samplers[i];
 115    for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 116       softpipe->samplers[PIPE_SHADER_VERTEX][i] = NULL;
 117
 118    softpipe->num_samplers[PIPE_SHADER_VERTEX] = num_samplers;
 119
 120    draw_set_samplers(softpipe->draw,
 121                      softpipe->samplers[PIPE_SHADER_VERTEX],
 122                      softpipe->num_samplers[PIPE_SHADER_VERTEX]);
 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_samplers[PIPE_SHADER_GEOMETRY] &&
 139        !memcmp(softpipe->samplers[PIPE_SHADER_GEOMETRY], samplers, num_samplers * sizeof(void *)))
 140       return;
 141
 142    draw_flush(softpipe->draw);
 143
 144    for (i = 0; i < num_samplers; ++i)
 145       softpipe->samplers[PIPE_SHADER_GEOMETRY][i] = samplers[i];
 146    for (i = num_samplers; i < PIPE_MAX_SAMPLERS; ++i)
 147       softpipe->samplers[PIPE_SHADER_GEOMETRY][i] = NULL;
 148
 149    softpipe->num_samplers[PIPE_SHADER_GEOMETRY] = 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_sampler_views[PIPE_SHADER_FRAGMENT] &&
 195        !memcmp(softpipe->sampler_views[PIPE_SHADER_FRAGMENT], 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->sampler_views[PIPE_SHADER_FRAGMENT][i], view);
 205       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[PIPE_SHADER_FRAGMENT][i], view);
 206    }
 207
 208    softpipe->num_sampler_views[PIPE_SHADER_FRAGMENT] = 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_sampler_views[PIPE_SHADER_VERTEX] &&
 226        !memcmp(softpipe->sampler_views[PIPE_SHADER_VERTEX],
 227                views, num * sizeof(struct pipe_sampler_view *))) {
 228       return;
 229    }
 230
 231    draw_flush(softpipe->draw);
 232
 233    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 234       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 235
 236       pipe_sampler_view_reference(&softpipe->sampler_views[PIPE_SHADER_VERTEX][i], view);
 237       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[PIPE_SHADER_VERTEX][i], view);
 238    }
 239
 240    softpipe->num_sampler_views[PIPE_SHADER_VERTEX] = num;
 241
 242    draw_set_sampler_views(softpipe->draw,
 243                           softpipe->sampler_views[PIPE_SHADER_VERTEX],
 244                           softpipe->num_sampler_views[PIPE_SHADER_VERTEX]);
 245
 246    softpipe->dirty |= SP_NEW_TEXTURE;
 247 }
 248
 249
 250 static void
 251 softpipe_set_geometry_sampler_views(struct pipe_context *pipe,
 252                                     unsigned num,
 253                                     struct pipe_sampler_view **views)
 254 {
 255    struct softpipe_context *softpipe = softpipe_context(pipe);
 256    uint i;
 257
 258    assert(num <= PIPE_MAX_GEOMETRY_SAMPLERS);
 259
 260    /* Check for no-op */
 261    if (num == softpipe->num_sampler_views[PIPE_SHADER_GEOMETRY] &&
 262        !memcmp(softpipe->sampler_views[PIPE_SHADER_GEOMETRY], views, num * sizeof(struct pipe_sampler_view *))) {
 263       return;
 264    }
 265
 266    draw_flush(softpipe->draw);
 267
 268    for (i = 0; i < PIPE_MAX_GEOMETRY_SAMPLERS; i++) {
 269       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 270
 271       pipe_sampler_view_reference(&softpipe->sampler_views[PIPE_SHADER_GEOMETRY][i], view);
 272       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[PIPE_SHADER_GEOMETRY][i], view);
 273    }
 274
 275    softpipe->num_sampler_views[PIPE_SHADER_GEOMETRY] = num;
 276
 277    softpipe->dirty |= SP_NEW_TEXTURE;
 278 }
 279
 280
 281 /**
 282  * Find/create an sp_sampler_variant object for sampling the given texture,
 283  * sampler and tex unit.
 284  *
 285  * Note that the tex unit is significant.  We can't re-use a sampler
 286  * variant for multiple texture units because the sampler variant contains
 287  * the texture object pointer.  If the texture object pointer were stored
 288  * somewhere outside the sampler variant, we could re-use samplers for
 289  * multiple texture units.
 290  */
 291 static struct sp_sampler_variant *
 292 get_sampler_variant( unsigned unit,
 293                      struct sp_sampler *sampler,
 294                      struct pipe_sampler_view *view,
 295                      unsigned processor )
 296 {
 297    struct softpipe_resource *sp_texture = softpipe_resource(view->texture);
 298    struct sp_sampler_variant *v = NULL;
 299    union sp_sampler_key key;
 300
 301    /* if this fails, widen the key.unit field and update this assertion */
 302    assert(PIPE_MAX_SAMPLERS <= 16);
 303
 304    key.bits.target = sp_texture->base.target;
 305    key.bits.is_pot = sp_texture->pot;
 306    key.bits.processor = processor;
 307    key.bits.unit = unit;
 308    key.bits.swizzle_r = view->swizzle_r;
 309    key.bits.swizzle_g = view->swizzle_g;
 310    key.bits.swizzle_b = view->swizzle_b;
 311    key.bits.swizzle_a = view->swizzle_a;
 312    key.bits.pad = 0;
 313
 314    if (sampler->current &&
 315        key.value == sampler->current->key.value) {
 316       v = sampler->current;
 317    }
 318
 319    if (v == NULL) {
 320       for (v = sampler->variants; v; v = v->next)
 321          if (v->key.value == key.value)
 322             break;
 323
 324       if (v == NULL) {
 325          v = sp_create_sampler_variant( &sampler->base, key );
 326          v->next = sampler->variants;
 327          sampler->variants = v;
 328       }
 329    }
 330
 331    sampler->current = v;
 332    return v;
 333 }
 334
 335
 336 /**
 337  * Reset the sampler variants for a shader stage (vert, frag, geom).
 338  */
 339 static void
 340 reset_sampler_variants(struct softpipe_context *softpipe,
 341                        unsigned shader,
 342                        unsigned tgsi_shader,
 343                        int max_sampler)
 344 {
 345    int i;
 346
 347    for (i = 0; i <= max_sampler; i++) {
 348       if (softpipe->samplers[shader][i]) {
 349          softpipe->tgsi.samplers_list[shader][i] =
 350             get_sampler_variant(i,
 351                                 sp_sampler(softpipe->samplers[shader][i]),
 352                                 softpipe->sampler_views[shader][i],
 353                                 tgsi_shader);
 354
 355          sp_sampler_variant_bind_view(softpipe->tgsi.samplers_list[shader][i],
 356                                       softpipe->tex_cache[shader][i],
 357                                       softpipe->sampler_views[shader][i]);
 358       }
 359    }
 360 }
 361
 362
 363 void
 364 softpipe_reset_sampler_variants(struct softpipe_context *softpipe)
 365 {
 366    /* It's a bit hard to build these samplers ahead of time -- don't
 367     * really know which samplers are going to be used for vertex and
 368     * fragment programs.
 369     */
 370
 371    /* XXX note: PIPE_SHADER_x != TGSI_PROCESSOR_x (fix that someday) */
 372    reset_sampler_variants(softpipe,
 373                           PIPE_SHADER_VERTEX,
 374                           TGSI_PROCESSOR_VERTEX,
 375                           softpipe->vs->max_sampler);
 376
 377    reset_sampler_variants(softpipe,
 378                           PIPE_SHADER_FRAGMENT,
 379                           TGSI_PROCESSOR_FRAGMENT,
 380                           softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
 381
 382    if (softpipe->gs) {
 383       reset_sampler_variants(softpipe,
 384                              PIPE_SHADER_GEOMETRY,
 385                              TGSI_PROCESSOR_GEOMETRY,
 386                              softpipe->gs->max_sampler);
 387    }
 388 }
 389
 390
 391 static void
 392 softpipe_delete_sampler_state(struct pipe_context *pipe,
 393                               void *sampler)
 394 {
 395    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 396    struct sp_sampler_variant *v, *tmp;
 397
 398    for (v = sp_sampler->variants; v; v = tmp) {
 399       tmp = v->next;
 400       sp_sampler_variant_destroy(v);
 401    }
 402
 403    FREE( sampler );
 404 }
 405
 406
 407 void
 408 softpipe_init_sampler_funcs(struct pipe_context *pipe)
 409 {
 410    pipe->create_sampler_state = softpipe_create_sampler_state;
 411    pipe->bind_fragment_sampler_states  = softpipe_bind_fragment_sampler_states;
 412    pipe->bind_vertex_sampler_states = softpipe_bind_vertex_sampler_states;
 413    pipe->bind_geometry_sampler_states = softpipe_bind_geometry_sampler_states;
 414    pipe->delete_sampler_state = softpipe_delete_sampler_state;
 415
 416    pipe->set_fragment_sampler_views = softpipe_set_fragment_sampler_views;
 417    pipe->set_vertex_sampler_views = softpipe_set_vertex_sampler_views;
 418    pipe->set_geometry_sampler_views = softpipe_set_geometry_sampler_views;
 419
 420    pipe->create_sampler_view = softpipe_create_sampler_view;
 421    pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
 422 }
 423