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  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((TEX_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 < Elements(tc->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 < Elements(tc->entries); pos++) {
  74.          /*assert(tc->entries[pos].x < 0);*/
  75.       }
  76.       if (tc->transfer) {
  77.          tc->pipe->transfer_unmap(tc->pipe, tc->transfer);
  78.       }
  79.       if (tc->tex_trans) {
  80.          tc->pipe->transfer_unmap(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 < Elements(tc->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_map) {
  135.          tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
  136.          tc->tex_trans = NULL;
  137.          tc->tex_trans_map = NULL;
  138.       }
  139.  
  140.       if (view) {
  141.          tc->swizzle_r = view->swizzle_r;
  142.          tc->swizzle_g = view->swizzle_g;
  143.          tc->swizzle_b = view->swizzle_b;
  144.          tc->swizzle_a = view->swizzle_a;
  145.          tc->format = view->format;
  146.       }
  147.  
  148.       /* mark as entries as invalid/empty */
  149.       /* XXX we should try to avoid this when the teximage hasn't changed */
  150.       for (i = 0; i < Elements(tc->entries); i++) {
  151.          tc->entries[i].addr.bits.invalid = 1;
  152.       }
  153.  
  154.       tc->tex_face = -1; /* any invalid value here */
  155.    }
  156. }
  157.  
  158.  
  159.  
  160.  
  161. /**
  162.  * Flush the tile cache: write all dirty tiles back to the transfer.
  163.  * any tiles "flagged" as cleared will be "really" cleared.
  164.  */
  165. void
  166. sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
  167. {
  168.    int pos;
  169.  
  170.    if (tc->texture) {
  171.       /* caching a texture, mark all entries as empty */
  172.       for (pos = 0; pos < Elements(tc->entries); pos++) {
  173.          tc->entries[pos].addr.bits.invalid = 1;
  174.       }
  175.       tc->tex_face = -1;
  176.    }
  177.  
  178. }
  179.  
  180.  
  181. /**
  182.  * Given the texture face, level, zslice, x and y values, compute
  183.  * the cache entry position/index where we'd hope to find the
  184.  * cached texture tile.
  185.  * This is basically a direct-map cache.
  186.  * XXX There's probably lots of ways in which we can improve this.
  187.  */
  188. static INLINE uint
  189. tex_cache_pos( union tex_tile_address addr )
  190. {
  191.    uint entry = (addr.bits.x +
  192.                  addr.bits.y * 9 +
  193.                  addr.bits.z * 3 +
  194.                  addr.bits.face +
  195.                  addr.bits.level * 7);
  196.  
  197.    return entry % NUM_TEX_TILE_ENTRIES;
  198. }
  199.  
  200. /**
  201.  * Similar to sp_get_cached_tile() but for textures.
  202.  * Tiles are read-only and indexed with more params.
  203.  */
  204. const struct softpipe_tex_cached_tile *
  205. sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
  206.                         union tex_tile_address addr )
  207. {
  208.    struct softpipe_tex_cached_tile *tile;
  209.    boolean zs = util_format_is_depth_or_stencil(tc->format);
  210.  
  211.    tile = tc->entries + tex_cache_pos( addr );
  212.  
  213.    if (addr.value != tile->addr.value) {
  214.  
  215.       /* cache miss.  Most misses are because we've invalidated the
  216.        * texture cache previously -- most commonly on binding a new
  217.        * texture.  Currently we effectively flush the cache on texture
  218.        * bind.
  219.        */
  220. #if 0
  221.       _debug_printf("miss at %u:  x=%d y=%d z=%d face=%d level=%d\n"
  222.                     "   tile %u:  x=%d y=%d z=%d face=%d level=%d\n",
  223.                     pos, x/TILE_SIZE, y/TILE_SIZE, z, face, level,
  224.                     pos, tile->addr.bits.x, tile->addr.bits.y, tile->z, tile->face, tile->level);
  225. #endif
  226.  
  227.       /* check if we need to get a new transfer */
  228.       if (!tc->tex_trans ||
  229.           tc->tex_face != addr.bits.face ||
  230.           tc->tex_level != addr.bits.level ||
  231.           tc->tex_z != addr.bits.z) {
  232.          /* get new transfer (view into texture) */
  233.          unsigned width, height, layer;
  234.  
  235.          if (tc->tex_trans_map) {
  236.             tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
  237.             tc->tex_trans = NULL;
  238.             tc->tex_trans_map = NULL;
  239.          }
  240.  
  241.          width = u_minify(tc->texture->width0, addr.bits.level);
  242.          if (tc->texture->target == PIPE_TEXTURE_1D_ARRAY) {
  243.             height = tc->texture->array_size;
  244.             layer = 0;
  245.          }
  246.          else {
  247.             height = u_minify(tc->texture->height0, addr.bits.level);
  248.             layer = addr.bits.face + addr.bits.z;
  249.          }
  250.  
  251.          tc->tex_trans_map =
  252.             pipe_transfer_map(tc->pipe, tc->texture,
  253.                               addr.bits.level,
  254.                               layer,
  255.                               PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED,
  256.                               0, 0, width, height, &tc->tex_trans);
  257.  
  258.          tc->tex_face = addr.bits.face;
  259.          tc->tex_level = addr.bits.level;
  260.          tc->tex_z = addr.bits.z;
  261.       }
  262.  
  263.       /* Get tile from the transfer (view into texture), explicitly passing
  264.        * the image format.
  265.        */
  266.       if (!zs && util_format_is_pure_uint(tc->format)) {
  267.          pipe_get_tile_ui_format(tc->tex_trans, tc->tex_trans_map,
  268.                                  addr.bits.x * TEX_TILE_SIZE,
  269.                                  addr.bits.y * TEX_TILE_SIZE,
  270.                                  TEX_TILE_SIZE,
  271.                                  TEX_TILE_SIZE,
  272.                                  tc->format,
  273.                                  (unsigned *) tile->data.colorui);
  274.       } else if (!zs && util_format_is_pure_sint(tc->format)) {
  275.          pipe_get_tile_i_format(tc->tex_trans, tc->tex_trans_map,
  276.                                 addr.bits.x * TEX_TILE_SIZE,
  277.                                 addr.bits.y * TEX_TILE_SIZE,
  278.                                 TEX_TILE_SIZE,
  279.                                 TEX_TILE_SIZE,
  280.                                 tc->format,
  281.                                 (int *) tile->data.colori);
  282.       } else {
  283.          pipe_get_tile_rgba_format(tc->tex_trans, tc->tex_trans_map,
  284.                                    addr.bits.x * TEX_TILE_SIZE,
  285.                                    addr.bits.y * TEX_TILE_SIZE,
  286.                                    TEX_TILE_SIZE,
  287.                                    TEX_TILE_SIZE,
  288.                                    tc->format,
  289.                                    (float *) tile->data.color);
  290.       }
  291.       tile->addr = addr;
  292.    }
  293.  
  294.    tc->last_tile = tile;
  295.    return tile;
  296. }
  297.