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 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 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 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    softpipe->dirty |= SP_NEW_SAMPLER;
 122 }
 123
 124
 125 struct pipe_sampler_view *
 126 softpipe_create_sampler_view(struct pipe_context *pipe,
 127                              struct pipe_resource *resource,
 128                              const struct pipe_sampler_view *templ)
 129 {
 130    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 131
 132    if (view) {
 133       *view = *templ;
 134       view->reference.count = 1;
 135       view->texture = NULL;
 136       pipe_resource_reference(&view->texture, resource);
 137       view->context = pipe;
 138    }
 139
 140    return view;
 141 }
 142
 143
 144 void
 145 softpipe_sampler_view_destroy(struct pipe_context *pipe,
 146                               struct pipe_sampler_view *view)
 147 {
 148    pipe_resource_reference(&view->texture, NULL);
 149    FREE(view);
 150 }
 151
 152
 153 void
 154 softpipe_set_sampler_views(struct pipe_context *pipe,
 155                            unsigned num,
 156                            struct pipe_sampler_view **views)
 157 {
 158    struct softpipe_context *softpipe = softpipe_context(pipe);
 159    uint i;
 160
 161    assert(num <= PIPE_MAX_SAMPLERS);
 162
 163    /* Check for no-op */
 164    if (num == softpipe->num_sampler_views &&
 165        !memcmp(softpipe->sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 166       return;
 167
 168    draw_flush(softpipe->draw);
 169
 170    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 171       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 172
 173       pipe_sampler_view_reference(&softpipe->sampler_views[i], view);
 174       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[i], view);
 175    }
 176
 177    softpipe->num_sampler_views = num;
 178
 179    softpipe->dirty |= SP_NEW_TEXTURE;
 180 }
 181
 182
 183 void
 184 softpipe_set_vertex_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_VERTEX_SAMPLERS);
 192
 193    /* Check for no-op */
 194    if (num == softpipe->num_vertex_sampler_views &&
 195        !memcmp(softpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 196       return;
 197    }
 198
 199    draw_flush(softpipe->draw);
 200
 201    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 202       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 203
 204       pipe_sampler_view_reference(&softpipe->vertex_sampler_views[i], view);
 205       sp_tex_tile_cache_set_sampler_view(softpipe->vertex_tex_cache[i], view);
 206    }
 207
 208    softpipe->num_vertex_sampler_views = num;
 209
 210    softpipe->dirty |= SP_NEW_TEXTURE;
 211 }
 212
 213
 214 /**
 215  * Find/create an sp_sampler_varient object for sampling the given texture,
 216  * sampler and tex unit.
 217  *
 218  * Note that the tex unit is significant.  We can't re-use a sampler
 219  * varient for multiple texture units because the sampler varient contains
 220  * the texture object pointer.  If the texture object pointer were stored
 221  * somewhere outside the sampler varient, we could re-use samplers for
 222  * multiple texture units.
 223  */
 224 static struct sp_sampler_varient *
 225 get_sampler_varient( unsigned unit,
 226                      struct sp_sampler *sampler,
 227                      struct pipe_resource *resource,
 228                      unsigned processor )
 229 {
 230    struct softpipe_resource *sp_texture = softpipe_resource(resource);
 231    struct sp_sampler_varient *v = NULL;
 232    union sp_sampler_key key;
 233
 234    /* if this fails, widen the key.unit field and update this assertion */
 235    assert(PIPE_MAX_SAMPLERS <= 16);
 236
 237    key.bits.target = sp_texture->base.target;
 238    key.bits.is_pot = sp_texture->pot;
 239    key.bits.processor = processor;
 240    key.bits.unit = unit;
 241    key.bits.pad = 0;
 242
 243    if (sampler->current &&
 244        key.value == sampler->current->key.value) {
 245       v = sampler->current;
 246    }
 247
 248    if (v == NULL) {
 249       for (v = sampler->varients; v; v = v->next)
 250          if (v->key.value == key.value)
 251             break;
 252
 253       if (v == NULL) {
 254          v = sp_create_sampler_varient( &sampler->base, key );
 255          v->next = sampler->varients;
 256          sampler->varients = v;
 257       }
 258    }
 259
 260    sampler->current = v;
 261    return v;
 262 }
 263
 264
 265
 266
 267 void
 268 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 269 {
 270    int i;
 271
 272    /* It's a bit hard to build these samplers ahead of time -- don't
 273     * really know which samplers are going to be used for vertex and
 274     * fragment programs.
 275     */
 276    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 277       if (softpipe->vertex_samplers[i]) {
 278          struct pipe_resource *texture = NULL;
 279
 280          if (softpipe->vertex_sampler_views[i]) {
 281             texture = softpipe->vertex_sampler_views[i]->texture;
 282          }
 283
 284          softpipe->tgsi.vert_samplers_list[i] =
 285             get_sampler_varient( i,
 286                                  sp_sampler(softpipe->vertex_samplers[i]),
 287                                  texture,
 288                                  TGSI_PROCESSOR_VERTEX );
 289
 290          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 291                                           softpipe->vertex_tex_cache[i],
 292                                           texture );
 293       }
 294    }
 295
 296    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 297       if (softpipe->sampler[i]) {
 298          struct pipe_resource *texture = NULL;
 299
 300          if (softpipe->sampler_views[i]) {
 301             texture = softpipe->sampler_views[i]->texture;
 302          }
 303
 304          softpipe->tgsi.frag_samplers_list[i] =
 305             get_sampler_varient( i,
 306                                  sp_sampler(softpipe->sampler[i]),
 307                                  texture,
 308                                  TGSI_PROCESSOR_FRAGMENT );
 309
 310          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 311                                           softpipe->tex_cache[i],
 312                                           texture );
 313       }
 314    }
 315 }
 316
 317
 318
 319 void
 320 softpipe_delete_sampler_state(struct pipe_context *pipe,
 321                               void *sampler)
 322 {
 323    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 324    struct sp_sampler_varient *v, *tmp;
 325
 326    for (v = sp_sampler->varients; v; v = tmp) {
 327       tmp = v->next;
 328       sp_sampler_varient_destroy(v);
 329    }
 330
 331    FREE( sampler );
 332 }
 333
 334
 335