src/gallium/drivers/llvmpipe/lp_tile_cache.h

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   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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  16  * of the Software.
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  27
  28 #ifndef LP_TILE_CACHE_H
  29 #define LP_TILE_CACHE_H
  30
  31 #define TILE_CLEAR_OPTIMIZATION 1
  32
  33
  34 #include "pipe/p_compiler.h"
  35
  36
  37 struct llvmpipe_context;
  38 struct llvmpipe_tile_cache;
  39
  40
  41 /**
  42  * Cache tile size (width and height). This needs to be a power of two.
  43  */
  44 #define TILE_SIZE 64
  45
  46
  47 /* If we need to support > 4096, just expand this to be a 64 bit
  48  * union, or consider tiling in Z as well.
  49  */
  50 union tile_address {
  51    struct {
  52       unsigned x:6;             /* 4096 / TILE_SIZE */
  53       unsigned y:6;             /* 4096 / TILE_SIZE */
  54       unsigned z:12;            /* 4096 -- z not tiled */
  55       unsigned face:3;
  56       unsigned level:4;
  57       unsigned invalid:1;
  58    } bits;
  59    unsigned value;
  60 };
  61
  62
  63 struct llvmpipe_cached_tile
  64 {
  65    union tile_address addr;
  66    union {
  67       float color[TILE_SIZE][TILE_SIZE][4];
  68       uint color32[TILE_SIZE][TILE_SIZE];
  69       uint depth32[TILE_SIZE][TILE_SIZE];
  70       ushort depth16[TILE_SIZE][TILE_SIZE];
  71       ubyte stencil8[TILE_SIZE][TILE_SIZE];
  72       ubyte any[1];
  73    } data;
  74 };
  75
  76 #define NUM_ENTRIES 50
  77
  78
  79 /** XXX move these */
  80 #define MAX_WIDTH 2048
  81 #define MAX_HEIGHT 2048
  82
  83
  84 struct llvmpipe_tile_cache
  85 {
  86    struct pipe_screen *screen;
  87    struct pipe_surface *surface;  /**< the surface we're caching */
  88    struct pipe_transfer *transfer;
  89    void *transfer_map;
  90
  91    struct pipe_texture *texture;  /**< if caching a texture */
  92    unsigned timestamp;
  93
  94    struct llvmpipe_cached_tile entries[NUM_ENTRIES];
  95    uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
  96    float clear_color[4];  /**< for color bufs */
  97    uint clear_val;        /**< for z+stencil, or packed color clear value */
  98    boolean depth_stencil; /**< Is the surface a depth/stencil format? */
  99
 100    struct pipe_transfer *tex_trans;
 101    void *tex_trans_map;
 102    int tex_face, tex_level, tex_z;
 103
 104    struct llvmpipe_cached_tile tile;  /**< scratch tile for clears */
 105
 106    struct llvmpipe_cached_tile *last_tile;  /**< most recently retrieved tile */
 107 };
 108
 109
 110 extern struct llvmpipe_tile_cache *
 111 lp_create_tile_cache( struct pipe_screen *screen );
 112
 113 extern void
 114 lp_destroy_tile_cache(struct llvmpipe_tile_cache *tc);
 115
 116 extern void
 117 lp_tile_cache_set_surface(struct llvmpipe_tile_cache *tc,
 118                           struct pipe_surface *lps);
 119
 120 extern struct pipe_surface *
 121 lp_tile_cache_get_surface(struct llvmpipe_tile_cache *tc);
 122
 123 extern void
 124 lp_tile_cache_map_transfers(struct llvmpipe_tile_cache *tc);
 125
 126 extern void
 127 lp_tile_cache_unmap_transfers(struct llvmpipe_tile_cache *tc);
 128
 129 extern void
 130 lp_flush_tile_cache(struct llvmpipe_tile_cache *tc);
 131
 132 extern void
 133 lp_tile_cache_clear(struct llvmpipe_tile_cache *tc, const float *rgba,
 134                     uint clearValue);
 135
 136 extern struct llvmpipe_cached_tile *
 137 lp_find_cached_tile(struct llvmpipe_tile_cache *tc,
 138                     union tile_address addr );
 139
 140 static INLINE const union tile_address
 141 tile_address( unsigned x,
 142               unsigned y,
 143               unsigned z,
 144               unsigned face,
 145               unsigned level )
 146 {
 147    union tile_address addr;
 148
 149    addr.value = 0;
 150    addr.bits.x = x / TILE_SIZE;
 151    addr.bits.y = y / TILE_SIZE;
 152    addr.bits.z = z;
 153    addr.bits.face = face;
 154    addr.bits.level = level;
 155
 156    return addr;
 157 }
 158
 159 /* Quickly retrieve tile if it matches last lookup.
 160  */
 161 static INLINE struct llvmpipe_cached_tile *
 162 lp_get_cached_tile(struct llvmpipe_tile_cache *tc,
 163                    int x, int y )
 164 {
 165    union tile_address addr = tile_address( x, y, 0, 0, 0 );
 166
 167    if (tc->last_tile->addr.value == addr.value)
 168       return tc->last_tile;
 169
 170    return lp_find_cached_tile( tc, addr );
 171 }
 172
 173
 174
 175
 176 #endif /* LP_TILE_CACHE_H */
 177