src/gallium/drivers/softpipe/sp_tex_tile_cache.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 /**
  29  * Texture tile caching.
  30  *
  31  * Author:
  32  *    Brian Paul
  33  */
  34
  35 #include "util/u_inlines.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_tile.h"
  38 #include "util/u_format.h"
  39 #include "util/u_math.h"
  40 #include "sp_context.h"
  41 #include "sp_texture.h"
  42 #include "sp_tex_tile_cache.h"
  43
  44
  45
  46 struct softpipe_tex_tile_cache *
  47 sp_create_tex_tile_cache( struct pipe_context *pipe )
  48 {
  49    struct softpipe_tex_tile_cache *tc;
  50    uint pos;
  51
  52    /* make sure max texture size works */
  53    assert((TILE_SIZE << TEX_ADDR_BITS) >= (1 << (SP_MAX_TEXTURE_2D_LEVELS-1)));
  54
  55    tc = CALLOC_STRUCT( softpipe_tex_tile_cache );
  56    if (tc) {
  57       tc->pipe = pipe;
  58       for (pos = 0; pos < NUM_ENTRIES; pos++) {
  59          tc->entries[pos].addr.bits.invalid = 1;
  60       }
  61       tc->last_tile = &tc->entries[0]; /* any tile */
  62    }
  63    return tc;
  64 }
  65
  66
  67 void
  68 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
  69 {
  70    if (tc) {
  71       uint pos;
  72
  73       for (pos = 0; pos < NUM_ENTRIES; pos++) {
  74          /*assert(tc->entries[pos].x < 0);*/
  75       }
  76       if (tc->transfer) {
  77          tc->pipe->transfer_destroy(tc->pipe, tc->transfer);
  78       }
  79       if (tc->tex_trans) {
  80          tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
  81       }
  82
  83       FREE( tc );
  84    }
  85 }
  86
  87
  88 /**
  89  * Invalidate all cached tiles for the cached texture.
  90  * Should be called when the texture is modified.
  91  */
  92 void
  93 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc)
  94 {
  95    unsigned i;
  96
  97    assert(tc);
  98    assert(tc->texture);
  99
 100    for (i = 0; i < NUM_ENTRIES; i++) {
 101       tc->entries[i].addr.bits.invalid = 1;
 102    }
 103 }
 104
 105 static boolean
 106 sp_tex_tile_is_compat_view(struct softpipe_tex_tile_cache *tc,
 107                            struct pipe_sampler_view *view)
 108 {
 109    if (!view)
 110       return FALSE;
 111    return (tc->texture == view->texture &&
 112            tc->format == view->format &&
 113            tc->swizzle_r == view->swizzle_r &&
 114            tc->swizzle_g == view->swizzle_g &&
 115            tc->swizzle_b == view->swizzle_b &&
 116            tc->swizzle_a == view->swizzle_a);
 117 }
 118
 119 /**
 120  * Specify the sampler view to cache.
 121  */
 122 void
 123 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
 124                                    struct pipe_sampler_view *view)
 125 {
 126    struct pipe_resource *texture = view ? view->texture : NULL;
 127    uint i;
 128
 129    assert(!tc->transfer);
 130
 131    if (!sp_tex_tile_is_compat_view(tc, view)) {
 132       pipe_resource_reference(&tc->texture, texture);
 133
 134       if (tc->tex_trans) {
 135          if (tc->tex_trans_map) {
 136             tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
 137             tc->tex_trans_map = NULL;
 138          }
 139
 140          tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
 141          tc->tex_trans = NULL;
 142       }
 143
 144       if (view) {
 145          tc->swizzle_r = view->swizzle_r;
 146          tc->swizzle_g = view->swizzle_g;
 147          tc->swizzle_b = view->swizzle_b;
 148          tc->swizzle_a = view->swizzle_a;
 149          tc->format = view->format;
 150       }
 151
 152       /* mark as entries as invalid/empty */
 153       /* XXX we should try to avoid this when the teximage hasn't changed */
 154       for (i = 0; i < NUM_ENTRIES; i++) {
 155          tc->entries[i].addr.bits.invalid = 1;
 156       }
 157
 158       tc->tex_face = -1; /* any invalid value here */
 159    }
 160 }
 161
 162
 163
 164
 165 /**
 166  * Flush the tile cache: write all dirty tiles back to the transfer.
 167  * any tiles "flagged" as cleared will be "really" cleared.
 168  */
 169 void
 170 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
 171 {
 172    int pos;
 173
 174    if (tc->texture) {
 175       /* caching a texture, mark all entries as empty */
 176       for (pos = 0; pos < NUM_ENTRIES; pos++) {
 177          tc->entries[pos].addr.bits.invalid = 1;
 178       }
 179       tc->tex_face = -1;
 180    }
 181
 182 }
 183
 184
 185 /**
 186  * Given the texture face, level, zslice, x and y values, compute
 187  * the cache entry position/index where we'd hope to find the
 188  * cached texture tile.
 189  * This is basically a direct-map cache.
 190  * XXX There's probably lots of ways in which we can improve this.
 191  */
 192 static INLINE uint
 193 tex_cache_pos( union tex_tile_address addr )
 194 {
 195    uint entry = (addr.bits.x +
 196                  addr.bits.y * 9 +
 197                  addr.bits.z * 3 +
 198                  addr.bits.face +
 199                  addr.bits.level * 7);
 200
 201    return entry % NUM_ENTRIES;
 202 }
 203
 204 /**
 205  * Similar to sp_get_cached_tile() but for textures.
 206  * Tiles are read-only and indexed with more params.
 207  */
 208 const struct softpipe_tex_cached_tile *
 209 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 210                         union tex_tile_address addr )
 211 {
 212    struct softpipe_tex_cached_tile *tile;
 213    boolean zs = util_format_is_depth_or_stencil(tc->format);
 214
 215    tile = tc->entries + tex_cache_pos( addr );
 216
 217    if (addr.value != tile->addr.value) {
 218
 219       /* cache miss.  Most misses are because we've invaldiated the
 220        * texture cache previously -- most commonly on binding a new
 221        * texture.  Currently we effectively flush the cache on texture
 222        * bind.
 223        */
 224 #if 0
 225       _debug_printf("miss at %u:  x=%d y=%d z=%d face=%d level=%d\n"
 226                     "   tile %u:  x=%d y=%d z=%d face=%d level=%d\n",
 227                     pos, x/TILE_SIZE, y/TILE_SIZE, z, face, level,
 228                     pos, tile->addr.bits.x, tile->addr.bits.y, tile->z, tile->face, tile->level);
 229 #endif
 230
 231       /* check if we need to get a new transfer */
 232       if (!tc->tex_trans ||
 233           tc->tex_face != addr.bits.face ||
 234           tc->tex_level != addr.bits.level ||
 235           tc->tex_z != addr.bits.z) {
 236          /* get new transfer (view into texture) */
 237          unsigned width, height, layer;
 238
 239          if (tc->tex_trans) {
 240             if (tc->tex_trans_map) {
 241                tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
 242                tc->tex_trans_map = NULL;
 243             }
 244
 245             tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
 246             tc->tex_trans = NULL;
 247          }
 248
 249          width = u_minify(tc->texture->width0, addr.bits.level);
 250          if (tc->texture->target == PIPE_TEXTURE_1D_ARRAY) {
 251             height = tc->texture->array_size;
 252             layer = 0;
 253          }
 254          else {
 255             height = u_minify(tc->texture->height0, addr.bits.level);
 256             layer = addr.bits.face + addr.bits.z;
 257          }
 258
 259          tc->tex_trans =
 260             pipe_get_transfer(tc->pipe, tc->texture,
 261                               addr.bits.level,
 262                               layer,
 263                               PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED,
 264                               0, 0, width, height);
 265
 266          tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
 267
 268          tc->tex_face = addr.bits.face;
 269          tc->tex_level = addr.bits.level;
 270          tc->tex_z = addr.bits.z;
 271       }
 272
 273       /* Get tile from the transfer (view into texture), explicitly passing
 274        * the image format.
 275        */
 276       if (!zs && util_format_is_pure_uint(tc->format)) {
 277          pipe_get_tile_ui_format(tc->pipe,
 278                                  tc->tex_trans,
 279                                  addr.bits.x * TILE_SIZE,
 280                                  addr.bits.y * TILE_SIZE,
 281                                  TILE_SIZE,
 282                                  TILE_SIZE,
 283                                  tc->format,
 284                                  (unsigned *) tile->data.colorui);
 285       } else if (!zs && util_format_is_pure_sint(tc->format)) {
 286          pipe_get_tile_i_format(tc->pipe,
 287                                 tc->tex_trans,
 288                                 addr.bits.x * TILE_SIZE,
 289                                 addr.bits.y * TILE_SIZE,
 290                                 TILE_SIZE,
 291                                  TILE_SIZE,
 292                                 tc->format,
 293                                 (int *) tile->data.colori);
 294       } else {
 295          pipe_get_tile_rgba_format(tc->pipe,
 296                                    tc->tex_trans,
 297                                    addr.bits.x * TILE_SIZE,
 298                                    addr.bits.y * TILE_SIZE,
 299                                    TILE_SIZE,
 300                                    TILE_SIZE,
 301                                    tc->format,
 302                                    (float *) tile->data.color);
 303       }
 304       tile->addr = addr;
 305    }
 306
 307    tc->last_tile = tile;
 308    return tile;
 309 }