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_set_sampler_textures(struct pipe_context *pipe,
  98                               unsigned num, struct pipe_texture **texture)
  99 {
 100    struct softpipe_context *softpipe = softpipe_context(pipe);
 101    uint i;
 102
 103    assert(num <= PIPE_MAX_SAMPLERS);
 104
 105    /* Check for no-op */
 106    if (num == softpipe->num_textures &&
 107        !memcmp(softpipe->texture, texture, num * sizeof(struct pipe_texture *)))
 108       return;
 109
 110    draw_flush(softpipe->draw);
 111
 112    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 113       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 114
 115       pipe_texture_reference(&softpipe->texture[i], tex);
 116       sp_tex_tile_cache_set_texture(softpipe->tex_cache[i], tex);
 117    }
 118
 119    softpipe->num_textures = num;
 120
 121    softpipe->dirty |= SP_NEW_TEXTURE;
 122 }
 123
 124
 125 /**
 126  * Find/create an sp_sampler_varient object for sampling the given texture,
 127  * sampler and tex unit.
 128  *
 129  * Note that the tex unit is significant.  We can't re-use a sampler
 130  * varient for multiple texture units because the sampler varient contains
 131  * the texture object pointer.  If the texture object pointer were stored
 132  * somewhere outside the sampler varient, we could re-use samplers for
 133  * multiple texture units.
 134  */
 135 static struct sp_sampler_varient *
 136 get_sampler_varient( unsigned unit,
 137                      struct sp_sampler *sampler,
 138                      struct pipe_texture *texture,
 139                      unsigned processor )
 140 {
 141    struct softpipe_texture *sp_texture = softpipe_texture(texture);
 142    struct sp_sampler_varient *v = NULL;
 143    union sp_sampler_key key;
 144
 145    /* if this fails, widen the key.unit field and update this assertion */
 146    assert(PIPE_MAX_SAMPLERS <= 16);
 147
 148    key.bits.target = sp_texture->base.target;
 149    key.bits.is_pot = sp_texture->pot;
 150    key.bits.processor = processor;
 151    key.bits.unit = unit;
 152    key.bits.pad = 0;
 153
 154    if (sampler->current &&
 155        key.value == sampler->current->key.value) {
 156       v = sampler->current;
 157    }
 158
 159    if (v == NULL) {
 160       for (v = sampler->varients; v; v = v->next)
 161          if (v->key.value == key.value)
 162             break;
 163
 164       if (v == NULL) {
 165          v = sp_create_sampler_varient( &sampler->base, key );
 166          v->next = sampler->varients;
 167          sampler->varients = v;
 168       }
 169    }
 170
 171    sampler->current = v;
 172    return v;
 173 }
 174
 175
 176
 177
 178 void
 179 softpipe_reset_sampler_varients(struct softpipe_context *softpipe)
 180 {
 181    int i;
 182
 183    /* It's a bit hard to build these samplers ahead of time -- don't
 184     * really know which samplers are going to be used for vertex and
 185     * fragment programs.
 186     */
 187    for (i = 0; i <= softpipe->vs->max_sampler; i++) {
 188       if (softpipe->sampler[i]) {
 189          softpipe->tgsi.vert_samplers_list[i] =
 190             get_sampler_varient( i,
 191                                  sp_sampler(softpipe->sampler[i]),
 192                                  softpipe->texture[i],
 193                                  TGSI_PROCESSOR_VERTEX );
 194
 195          sp_sampler_varient_bind_texture( softpipe->tgsi.vert_samplers_list[i],
 196                                           softpipe->tex_cache[i],
 197                                           softpipe->texture[i] );
 198       }
 199    }
 200
 201    for (i = 0; i <= softpipe->fs->info.file_max[TGSI_FILE_SAMPLER]; i++) {
 202       if (softpipe->sampler[i]) {
 203          softpipe->tgsi.frag_samplers_list[i] =
 204             get_sampler_varient( i,
 205                                  sp_sampler(softpipe->sampler[i]),
 206                                  softpipe->texture[i],
 207                                  TGSI_PROCESSOR_FRAGMENT );
 208
 209          sp_sampler_varient_bind_texture( softpipe->tgsi.frag_samplers_list[i],
 210                                           softpipe->tex_cache[i],
 211                                           softpipe->texture[i] );
 212       }
 213    }
 214 }
 215
 216
 217
 218 void
 219 softpipe_delete_sampler_state(struct pipe_context *pipe,
 220                               void *sampler)
 221 {
 222    struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
 223    struct sp_sampler_varient *v, *tmp;
 224
 225    for (v = sp_sampler->varients; v; v = tmp) {
 226       tmp = v->next;
 227       sp_sampler_varient_destroy(v);
 228    }
 229
 230    FREE( sampler );
 231 }
 232
 233
 234