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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
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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_context *pipe;
  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    unsigned swizzle_r;
  87    unsigned swizzle_g;
  88    unsigned swizzle_b;
  89    unsigned swizzle_a;
  90    unsigned format;
  91
  92    struct softpipe_tex_cached_tile *last_tile;  /**< most recently retrieved tile */
  93 };
  94
  95
  96 extern struct softpipe_tex_tile_cache *
  97 sp_create_tex_tile_cache( struct pipe_context *pipe );
  98
  99 extern void
 100 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
 101
 102
 103 extern void
 104 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
 105
 106 extern void
 107 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
 108
 109 extern void
 110 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
 111                                    struct pipe_sampler_view *view);
 112
 113 void
 114 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
 115
 116 extern void
 117 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
 118
 119
 120
 121 extern const struct softpipe_tex_cached_tile *
 122 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 123                          union tex_tile_address addr );
 124
 125 static INLINE union tex_tile_address
 126 tex_tile_address( unsigned x,
 127                   unsigned y,
 128                   unsigned z,
 129                   unsigned face,
 130                   unsigned level )
 131 {
 132    union tex_tile_address addr;
 133
 134    addr.value = 0;
 135    addr.bits.x = x / TILE_SIZE;
 136    addr.bits.y = y / TILE_SIZE;
 137    addr.bits.z = z;
 138    addr.bits.face = face;
 139    addr.bits.level = level;
 140
 141    return addr;
 142 }
 143
 144 /* Quickly retrieve tile if it matches last lookup.
 145  */
 146 static INLINE const struct softpipe_tex_cached_tile *
 147 sp_get_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
 148                          union tex_tile_address addr )
 149 {
 150    if (tc->last_tile->addr.value == addr.value)
 151       return tc->last_tile;
 152
 153    return sp_find_cached_tile_tex( tc, addr );
 154 }
 155
 156
 157
 158
 159
 160 #endif /* SP_TEX_TILE_CACHE_H */
 161