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
  34 #include "draw/draw_context.h"
  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 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 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 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    softpipe->dirty |= SP_NEW_SAMPLER;
 121 }
 122
 123
 124 struct pipe_sampler_view *
 125 softpipe_create_sampler_view(struct pipe_context *pipe,
 126                              struct pipe_texture *texture,
 127                              const struct pipe_sampler_view *templ)
 128 {
 129    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 130
 131    *view = *templ;
 132    view->reference.count = 1;
 133    view->texture = NULL;
 134    pipe_texture_reference(&view->texture, texture);
 135    view->context = pipe;
 136
 137    return view;
 138 }
 139
 140
 141 void
 142 softpipe_sampler_view_destroy(struct pipe_context *pipe,
 143                               struct pipe_sampler_view *view)
 144 {
 145    pipe_texture_reference(&view->texture, NULL);
 146    FREE(view);
 147 }
 148
 149
 150 void
 151 softpipe_set_sampler_views(struct pipe_context *pipe,
 152                            unsigned num,
 153                            struct pipe_sampler_view **views)
 154 {
 155    struct softpipe_context *softpipe = softpipe_context(pipe);
 156    uint i;
 157
 158    assert(num <= PIPE_MAX_SAMPLERS);
 159
 160    /* Check for no-op */
 161    if (num == softpipe->num_sampler_views &&
 162        !memcmp(softpipe->sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 163       return;
 164
 165    draw_flush(softpipe->draw);
 166
 167    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 168       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 169
 170       pipe_sampler_view_reference(&softpipe->sampler_views[i], view);
 171       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[i], view);
 172    }
 173
 174    softpipe->num_sampler_views = num;
 175
 176    softpipe->dirty |= SP_NEW_TEXTURE;
 177 }
 178
 179
 180 void
 181 softpipe_set_vertex_sampler_views(struct pipe_context *pipe,
 182                                   unsigned num,
 183                                   struct pipe_sampler_view **views)
 184 {
 185    struct softpipe_context *softpipe = softpipe_context(pipe);
 186    uint i;
 187
 188    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 189
 190    /* Check for no-op */
 191    if (num == softpipe->num_vertex_sampler_views &&
 192        !memcmp(softpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 193       return;
 194    }
 195
 196    draw_flush(softpipe->draw);
 197
 198    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 199       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 200
 201       pipe_sampler_view_reference(&softpipe->vertex_sampler_views[i], view);
 202       sp_tex_tile_cache_set_sampler_view(softpipe->vertex_tex_cache[i], view);
 203    }
 204
 205    softpipe->num_vertex_sampler_views = num;
 206
 207    softpipe->dirty |= SP_NEW_TEXTURE;
 208 }
 209
 210
 211 /**
 212  * Find/create an sp_sampler_varient object for sampling the given texture,
 213  * sampler and tex unit.
 214  *
 215  * Note that the tex unit is significant.  We can't re-use a sampler
 216  * varient for multiple texture units because the sampler varient contains
 217  * the texture object pointer.  If the texture object pointer were stored
 218  * somewhere outside the sampler varient, we could re-use samplers for
 219  * multiple texture units.
 220  */
 221 static struct sp_sampler_varient *
 222 get_sampler_varient( unsigned unit,
 223                      struct sp_sampler *sampler,
 224                      struct pipe_texture *texture,
 225                      unsigned processor )
 226 {
 227    struct softpipe_texture *sp_texture = softpipe_texture(texture);
 228    struct sp_sampler_varient *v = NULL;
 229    union sp_sampler_key key;
 230
 231    /* if this fails, widen the key.unit field and update this assertion */
 232    assert(PIPE_MAX_SAMPLERS <= 16);
 233
 234    key.bits.target = sp_texture->base.target;
 235    key.bits.is_pot = sp_texture->pot;
 236    key.bits.processor = processor;
 237    key.bits.unit = unit;
 238    key.bits.pad = 0;
 239
 240    if (sampler->current &&
 241        key.value == sampler->current->key.value) {
 242       v = sampler->current;
 243    }
 244
 245    if (v == NULL) {
 246       for (v = sampler->varients; v; v = v->next)
 247          if (v->key.value == key.value)
 248             break;
 249
 250       if (v == NULL) {
 251          v = sp_create_sampler_varient( &sampler->base, key );
 252          v->next = sampler->varients;
 253          sampler->varients = v;
 254       }
 255    }
 256
 257    sampler->current = v;
 258    return v;
 259 }
 260
 261
 262
 263
 264 void
 265 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 266 {
 267    int i;
 268
 269    /* It's a bit hard to build these samplers ahead of time -- don't
 270     * really know which samplers are going to be used for vertex and
 271     * fragment programs.
 272     */
 273    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 274       if (softpipe->vertex_samplers[i]) {
 275          struct pipe_texture *texture = NULL;
 276
 277          if (softpipe->vertex_sampler_views[i]) {
 278             texture = softpipe->vertex_sampler_views[i]->texture;
 279          }
 280
 281          softpipe->tgsi.vert_samplers_list[i] =
 282             get_sampler_varient( i,
 283                                  sp_sampler(softpipe->vertex_samplers[i]),
 284                                  texture,
 285                                  TGSI_PROCESSOR_VERTEX );
 286
 287          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 288                                           softpipe->vertex_tex_cache[i],
 289                                           texture );
 290       }
 291    }
 292
 293    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 294       if (softpipe->sampler[i]) {
 295          struct pipe_texture *texture = NULL;
 296
 297          if (softpipe->sampler_views[i]) {
 298             texture = softpipe->sampler_views[i]->texture;
 299          }
 300
 301          softpipe->tgsi.frag_samplers_list[i] =
 302             get_sampler_varient( i,
 303                                  sp_sampler(softpipe->sampler[i]),
 304                                  texture,
 305                                  TGSI_PROCESSOR_FRAGMENT );
 306
 307          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 308                                           softpipe->tex_cache[i],
 309                                           texture );
 310       }
 311    }
 312 }
 313
 314
 315
 316 void
 317 softpipe_delete_sampler_state(struct pipe_context *pipe,
 318                               void *sampler)
 319 {
 320    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 321    struct sp_sampler_varient *v, *tmp;
 322
 323    for (v = sp_sampler->varients; v; v = tmp) {
 324       tmp = v->next;
 325       sp_sampler_varient_destroy(v);
 326    }
 327
 328    FREE( sampler );
 329 }
 330
 331
 332