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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 #ifndef SP_TEX_TILE_CACHE_H
     29 #define SP_TEX_TILE_CACHE_H
     30 
     31 
     32 #include "pipe/p_compiler.h"
     33 #include "sp_limits.h"
     34 
     35 
     36 struct softpipe_context;
     37 struct softpipe_tex_tile_cache;
     38 
     39 
     40 /**
     41  * Cache tile size (width and height). This needs to be a power of two.
     42  */
     43 #define TILE_SIZE_LOG2 6
     44 #define TILE_SIZE (1 << TILE_SIZE_LOG2)
     45 
     46 
     47 #define TEX_ADDR_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1 - TILE_SIZE_LOG2)
     48 #define TEX_Z_BITS (SP_MAX_TEXTURE_2D_LEVELS - 1)
     49 
     50 /**
     51  * Texture tile address as a union for fast compares.
     52  */
     53 union tex_tile_address {
     54    struct {
     55       unsigned x:TEX_ADDR_BITS;  /* 16K / TILE_SIZE */
     56       unsigned y:TEX_ADDR_BITS;  /* 16K / TILE_SIZE */
     57       unsigned z:TEX_Z_BITS;     /* 16K -- z not tiled */
     58       unsigned face:3;
     59       unsigned level:4;
     60       unsigned invalid:1;
     61    } bits;
     62    uint64_t value;
     63 };
     64 
     65 
     66 struct softpipe_tex_cached_tile
     67 {
     68    union tex_tile_address addr;
     69    union {
     70       float color[TILE_SIZE][TILE_SIZE][4];
     71       unsigned int colorui[TILE_SIZE][TILE_SIZE][4];
     72       int colori[TILE_SIZE][TILE_SIZE][4];
     73    } data;
     74 };
     75 
     76 #define NUM_ENTRIES 50
     77 
     78 struct softpipe_tex_tile_cache
     79 {
     80    struct pipe_context *pipe;
     81    struct pipe_transfer *transfer;
     82    void *transfer_map;
     83 
     84    struct pipe_resource *texture;  /**< if caching a texture */
     85    unsigned timestamp;
     86 
     87    struct softpipe_tex_cached_tile entries[NUM_ENTRIES];
     88 
     89    struct pipe_transfer *tex_trans;
     90    void *tex_trans_map;
     91    int tex_face, tex_level, tex_z;
     92 
     93    unsigned swizzle_r;
     94    unsigned swizzle_g;
     95    unsigned swizzle_b;
     96    unsigned swizzle_a;
     97    enum pipe_format format;
     98 
     99    struct softpipe_tex_cached_tile *last_tile;  /**< most recently retrieved tile */
    100 };
    101 
    102 
    103 extern struct softpipe_tex_tile_cache *
    104 sp_create_tex_tile_cache( struct pipe_context *pipe );
    105 
    106 extern void
    107 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
    108 
    109 
    110 extern void
    111 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
    112 
    113 extern void
    114 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
    115 
    116 extern void
    117 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
    118                                    struct pipe_sampler_view *view);
    119 
    120 void
    121 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
    122 
    123 extern void
    124 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
    125 
    126 
    127 
    128 extern const struct softpipe_tex_cached_tile *
    129 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
    130                          union tex_tile_address addr );
    131 
    132 static INLINE union tex_tile_address
    133 tex_tile_address( unsigned x,
    134                   unsigned y,
    135                   unsigned z,
    136                   unsigned face,
    137                   unsigned level )
    138 {
    139    union tex_tile_address addr;
    140 
    141    addr.value = 0;
    142    addr.bits.x = x / TILE_SIZE;
    143    addr.bits.y = y / TILE_SIZE;
    144    addr.bits.z = z;
    145    addr.bits.face = face;
    146    addr.bits.level = level;
    147 
    148    return addr;
    149 }
    150 
    151 /* Quickly retrieve tile if it matches last lookup.
    152  */
    153 static INLINE const struct softpipe_tex_cached_tile *
    154 sp_get_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
    155                          union tex_tile_address addr )
    156 {
    157    if (tc->last_tile->addr.value == addr.value)
    158       return tc->last_tile;
    159 
    160    return sp_find_cached_tile_tex( tc, addr );
    161 }
    162 
    163 
    164 #endif /* SP_TEX_TILE_CACHE_H */
    165 
    166