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    if (view) {
 132       *view = *templ;
 133       view->reference.count = 1;
 134       view->texture = NULL;
 135       pipe_texture_reference(&view->texture, texture);
 136       view->context = pipe;
 137    }
 138
 139    return view;
 140 }
 141
 142
 143 void
 144 softpipe_sampler_view_destroy(struct pipe_context *pipe,
 145                               struct pipe_sampler_view *view)
 146 {
 147    pipe_texture_reference(&view->texture, NULL);
 148    FREE(view);
 149 }
 150
 151
 152 void
 153 softpipe_set_sampler_views(struct pipe_context *pipe,
 154                            unsigned num,
 155                            struct pipe_sampler_view **views)
 156 {
 157    struct softpipe_context *softpipe = softpipe_context(pipe);
 158    uint i;
 159
 160    assert(num <= PIPE_MAX_SAMPLERS);
 161
 162    /* Check for no-op */
 163    if (num == softpipe->num_sampler_views &&
 164        !memcmp(softpipe->sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 165       return;
 166
 167    draw_flush(softpipe->draw);
 168
 169    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 170       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 171
 172       pipe_sampler_view_reference(&softpipe->sampler_views[i], view);
 173       sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[i], view);
 174    }
 175
 176    softpipe->num_sampler_views = num;
 177
 178    softpipe->dirty |= SP_NEW_TEXTURE;
 179 }
 180
 181
 182 void
 183 softpipe_set_vertex_sampler_views(struct pipe_context *pipe,
 184                                   unsigned num,
 185                                   struct pipe_sampler_view **views)
 186 {
 187    struct softpipe_context *softpipe = softpipe_context(pipe);
 188    uint i;
 189
 190    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 191
 192    /* Check for no-op */
 193    if (num == softpipe->num_vertex_sampler_views &&
 194        !memcmp(softpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 195       return;
 196    }
 197
 198    draw_flush(softpipe->draw);
 199
 200    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 201       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 202
 203       pipe_sampler_view_reference(&softpipe->vertex_sampler_views[i], view);
 204       sp_tex_tile_cache_set_sampler_view(softpipe->vertex_tex_cache[i], view);
 205    }
 206
 207    softpipe->num_vertex_sampler_views = num;
 208
 209    softpipe->dirty |= SP_NEW_TEXTURE;
 210 }
 211
 212
 213 /**
 214  * Find/create an sp_sampler_varient object for sampling the given texture,
 215  * sampler and tex unit.
 216  *
 217  * Note that the tex unit is significant.  We can't re-use a sampler
 218  * varient for multiple texture units because the sampler varient contains
 219  * the texture object pointer.  If the texture object pointer were stored
 220  * somewhere outside the sampler varient, we could re-use samplers for
 221  * multiple texture units.
 222  */
 223 static struct sp_sampler_varient *
 224 get_sampler_varient( unsigned unit,
 225                      struct sp_sampler *sampler,
 226                      struct pipe_texture *texture,
 227                      unsigned processor )
 228 {
 229    struct softpipe_texture *sp_texture = softpipe_texture(texture);
 230    struct sp_sampler_varient *v = NULL;
 231    union sp_sampler_key key;
 232
 233    /* if this fails, widen the key.unit field and update this assertion */
 234    assert(PIPE_MAX_SAMPLERS <= 16);
 235
 236    key.bits.target = sp_texture->base.target;
 237    key.bits.is_pot = sp_texture->pot;
 238    key.bits.processor = processor;
 239    key.bits.unit = unit;
 240    key.bits.pad = 0;
 241
 242    if (sampler->current &&
 243        key.value == sampler->current->key.value) {
 244       v = sampler->current;
 245    }
 246
 247    if (v == NULL) {
 248       for (v = sampler->varients; v; v = v->next)
 249          if (v->key.value == key.value)
 250             break;
 251
 252       if (v == NULL) {
 253          v = sp_create_sampler_varient( &sampler->base, key );
 254          v->next = sampler->varients;
 255          sampler->varients = v;
 256       }
 257    }
 258
 259    sampler->current = v;
 260    return v;
 261 }
 262
 263
 264
 265
 266 void
 267 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 268 {
 269    int i;
 270
 271    /* It's a bit hard to build these samplers ahead of time -- don't
 272     * really know which samplers are going to be used for vertex and
 273     * fragment programs.
 274     */
 275    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 276       if (softpipe->vertex_samplers[i]) {
 277          struct pipe_texture *texture = NULL;
 278
 279          if (softpipe->vertex_sampler_views[i]) {
 280             texture = softpipe->vertex_sampler_views[i]->texture;
 281          }
 282
 283          softpipe->tgsi.vert_samplers_list[i] =
 284             get_sampler_varient( i,
 285                                  sp_sampler(softpipe->vertex_samplers[i]),
 286                                  texture,
 287                                  TGSI_PROCESSOR_VERTEX );
 288
 289          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 290                                           softpipe->vertex_tex_cache[i],
 291                                           texture );
 292       }
 293    }
 294
 295    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 296       if (softpipe->sampler[i]) {
 297          struct pipe_texture *texture = NULL;
 298
 299          if (softpipe->sampler_views[i]) {
 300             texture = softpipe->sampler_views[i]->texture;
 301          }
 302
 303          softpipe->tgsi.frag_samplers_list[i] =
 304             get_sampler_varient( i,
 305                                  sp_sampler(softpipe->sampler[i]),
 306                                  texture,
 307                                  TGSI_PROCESSOR_FRAGMENT );
 308
 309          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 310                                           softpipe->tex_cache[i],
 311                                           texture );
 312       }
 313    }
 314 }
 315
 316
 317
 318 void
 319 softpipe_delete_sampler_state(struct pipe_context *pipe,
 320                               void *sampler)
 321 {
 322    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 323    struct sp_sampler_varient *v, *tmp;
 324
 325    for (v = sp_sampler->varients; v; v = tmp) {
 326       tmp = v->next;
 327       sp_sampler_varient_destroy(v);
 328    }
 329
 330    FREE( sampler );
 331 }
 332
 333
 334