src/gallium/drivers/llvmpipe/lp_tex_cache.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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   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:
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  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.
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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  26  **************************************************************************/
  27
  28 #ifndef LP_TEX_CACHE_H
  29 #define LP_TEX_CACHE_H
  30
  31
  32 #include "pipe/p_compiler.h"
  33
  34
  35 struct llvmpipe_context;
  36 struct llvmpipe_tex_tile_cache;
  37
  38
  39 /**
  40  * Cache tile size (width and height). This needs to be a power of two.
  41  */
  42 #define TEX_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 / TEX_TILE_SIZE */
  51       unsigned y:6;             /* 4096 / TEX_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 llvmpipe_cached_tex_tile
  62 {
  63    union tex_tile_address addr;
  64    uint8_t color[TEX_TILE_SIZE][TEX_TILE_SIZE][4];
  65 };
  66
  67 #define NUM_ENTRIES 50
  68
  69
  70 /** XXX move these */
  71 #define MAX_TEX_WIDTH 2048
  72 #define MAX_TEX_HEIGHT 2048
  73
  74
  75 struct llvmpipe_tex_tile_cache
  76 {
  77    struct pipe_screen *screen;
  78    struct pipe_surface *surface;  /**< the surface we're caching */
  79    struct pipe_transfer *transfer;
  80    void *transfer_map;
  81
  82    struct pipe_texture *texture;  /**< if caching a texture */
  83    unsigned timestamp;
  84
  85    struct llvmpipe_cached_tex_tile entries[NUM_ENTRIES];
  86
  87    struct pipe_transfer *tex_trans;
  88    void *tex_trans_map;
  89    int tex_face, tex_level, tex_z;
  90
  91    struct llvmpipe_cached_tex_tile *last_tile;  /**< most recently retrieved tile */
  92 };
  93
  94
  95 extern struct llvmpipe_tex_tile_cache *
  96 lp_create_tex_tile_cache( struct pipe_screen *screen );
  97
  98 extern void
  99 lp_destroy_tex_tile_cache(struct llvmpipe_tex_tile_cache *tc);
 100
 101 extern void
 102 lp_tex_tile_cache_map_transfers(struct llvmpipe_tex_tile_cache *tc);
 103
 104 extern void
 105 lp_tex_tile_cache_unmap_transfers(struct llvmpipe_tex_tile_cache *tc);
 106
 107 extern void
 108 lp_tex_tile_cache_set_texture(struct llvmpipe_tex_tile_cache *tc,
 109                           struct pipe_texture *texture);
 110
 111 void
 112 lp_tex_tile_cache_validate_texture(struct llvmpipe_tex_tile_cache *tc);
 113
 114 extern const struct llvmpipe_cached_tex_tile *
 115 lp_find_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
 116                         union tex_tile_address addr );
 117
 118 static INLINE const union tex_tile_address
 119 tex_tile_address( unsigned x,
 120                   unsigned y,
 121                   unsigned z,
 122                   unsigned face,
 123                   unsigned level )
 124 {
 125    union tex_tile_address addr;
 126
 127    addr.value = 0;
 128    addr.bits.x = x / TEX_TILE_SIZE;
 129    addr.bits.y = y / TEX_TILE_SIZE;
 130    addr.bits.z = z;
 131    addr.bits.face = face;
 132    addr.bits.level = level;
 133
 134    return addr;
 135 }
 136
 137 /* Quickly retrieve tile if it matches last lookup.
 138  */
 139 static INLINE const struct llvmpipe_cached_tex_tile *
 140 lp_get_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
 141                        union tex_tile_address addr )
 142 {
 143    if (tc->last_tile->addr.value == addr.value)
 144       return tc->last_tile;
 145
 146    return lp_find_cached_tex_tile( tc, addr );
 147 }
 148
 149
 150 #endif /* LP_TEX_CACHE_H */
 151