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