src/gallium/drivers/softpipe/sp_tex_tile_cache.h

   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
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  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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef SP_TEX_TILE_CACHE_H
  29 #define SP_TEX_TILE_CACHE_H
  30
  31
  32 #include "pipe/p_compiler.h"
  33
  34
  35 struct softpipe_context;
  36 struct softpipe_tex_tile_cache;
  37
  38
  39 /**
  40  * Cache tile size (width and height). This needs to be a power of two.
  41  */
  42 #define TILE_SIZE 64
  43
  44
  45 /* If we need to support > 4096, just expand this to be a 64 bit
  46  * union, or consider tiling in Z as well.
  47  */
  48 union tex_tile_address {
  49    struct {
  50       unsigned x:6;             /* 4096 / TILE_SIZE */
  51       unsigned y:6;             /* 4096 / TILE_SIZE */
  52       unsigned z:12;            /* 4096 -- z not tiled */
  53       unsigned face:3;
  54       unsigned level:4;
  55       unsigned invalid:1;
  56    } bits;
  57    unsigned value;
  58 };
  59
  60
  61 struct softpipe_tex_cached_tile
  62 {
  63    union tex_tile_address addr;
  64    union {
  65       float color[TILE_SIZE][TILE_SIZE][4];
  66    } data;
  67 };
  68
  69 #define NUM_ENTRIES 50
  70
  71 struct softpipe_tex_tile_cache
  72 {
  73    struct pipe_screen *screen;
  74    struct pipe_transfer *transfer;
  75    void *transfer_map;
  76
  77    struct pipe_texture *texture;  /**< if caching a texture */
  78    unsigned timestamp;
  79
  80    struct softpipe_tex_cached_tile entries[NUM_ENTRIES];
  81
  82    struct pipe_transfer *tex_trans;
  83    void *tex_trans_map;
  84    int tex_face, tex_level, tex_z;
  85
  86    struct softpipe_tex_cached_tile *last_tile;  /**< most recently retrieved tile */
  87 };
  88
  89
  90 extern struct softpipe_tex_tile_cache *
  91 sp_create_tex_tile_cache( struct pipe_screen *screen );
  92
  93 extern void
  94 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
  95
  96
  97 extern void
  98 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
  99
 100 extern void
 101 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
 102
 103 extern void
 104 sp_tex_tile_cache_set_texture(struct softpipe_tex_tile_cache *tc,
 105                           struct pipe_texture *texture);
 106
 107 void
 108 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
 109
 110 extern void
 111 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
 112
 113
 114
 115 extern const struct softpipe_tex_cached_tile *
 116 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 117                          union tex_tile_address addr );
 118
 119 static INLINE union tex_tile_address
 120 tex_tile_address( unsigned x,
 121                   unsigned y,
 122                   unsigned z,
 123                   unsigned face,
 124                   unsigned level )
 125 {
 126    union tex_tile_address addr;
 127
 128    addr.value = 0;
 129    addr.bits.x = x / TILE_SIZE;
 130    addr.bits.y = y / TILE_SIZE;
 131    addr.bits.z = z;
 132    addr.bits.face = face;
 133    addr.bits.level = level;
 134
 135    return addr;
 136 }
 137
 138 /* Quickly retrieve tile if it matches last lookup.
 139  */
 140 static INLINE const struct softpipe_tex_cached_tile *
 141 sp_get_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 142                          union tex_tile_address addr )
 143 {
 144    if (tc->last_tile->addr.value == addr.value)
 145       return tc->last_tile;
 146
 147    return sp_find_cached_tile_tex( tc, addr );
 148 }
 149
 150
 151
 152
 153
 154 #endif /* SP_TEX_TILE_CACHE_H */
 155