src/gallium/drivers/softpipe/sp_tile_cache.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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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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  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
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  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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  26  **************************************************************************/
  27
  28 #ifndef SP_TILE_CACHE_H
  29 #define SP_TILE_CACHE_H
  30
  31 #define TILE_CLEAR_OPTIMIZATION 1
  32
  33
  34 #include "pipe/p_compiler.h"
  35
  36
  37 struct softpipe_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 64
  44
  45
  46 /* If we need to support > 4096, just expand this to be a 64 bit
  47  * union, or consider tiling in Z as well.
  48  */
  49 union tile_address {
  50    struct {
  51       unsigned x:6;             /* 4096 / TILE_SIZE */
  52       unsigned y:6;             /* 4096 / TILE_SIZE */
  53       unsigned invalid:1;
  54       unsigned pad:19;
  55    } bits;
  56    unsigned value;
  57 };
  58
  59
  60 struct softpipe_cached_tile
  61 {
  62    union tile_address addr;
  63    union {
  64       float color[TILE_SIZE][TILE_SIZE][4];
  65       uint color32[TILE_SIZE][TILE_SIZE];
  66       uint depth32[TILE_SIZE][TILE_SIZE];
  67       ushort depth16[TILE_SIZE][TILE_SIZE];
  68       ubyte stencil8[TILE_SIZE][TILE_SIZE];
  69       ubyte any[1];
  70    } data;
  71 };
  72
  73 #define NUM_ENTRIES 50
  74
  75
  76 /** XXX move these */
  77 #define MAX_WIDTH 4096
  78 #define MAX_HEIGHT 4096
  79
  80
  81 struct softpipe_tile_cache
  82 {
  83    struct pipe_context *pipe;
  84    struct pipe_surface *surface;  /**< the surface we're caching */
  85    struct pipe_transfer *transfer;
  86    void *transfer_map;
  87
  88    struct softpipe_cached_tile entries[NUM_ENTRIES];
  89    uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
  90    float clear_color[4];  /**< for color bufs */
  91    uint clear_val;        /**< for z+stencil, or packed color clear value */
  92    boolean depth_stencil; /**< Is the surface a depth/stencil format? */
  93
  94    struct softpipe_cached_tile tile;  /**< scratch tile for clears */
  95
  96    struct softpipe_cached_tile *last_tile;  /**< most recently retrieved tile */
  97 };
  98
  99
 100 extern struct softpipe_tile_cache *
 101 sp_create_tile_cache( struct pipe_context *pipe );
 102
 103 extern void
 104 sp_destroy_tile_cache(struct softpipe_tile_cache *tc);
 105
 106 extern void
 107 sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
 108                           struct pipe_surface *sps);
 109
 110 extern struct pipe_surface *
 111 sp_tile_cache_get_surface(struct softpipe_tile_cache *tc);
 112
 113 extern void
 114 sp_tile_cache_map_transfers(struct softpipe_tile_cache *tc);
 115
 116 extern void
 117 sp_tile_cache_unmap_transfers(struct softpipe_tile_cache *tc);
 118
 119 extern void
 120 sp_flush_tile_cache(struct softpipe_tile_cache *tc);
 121
 122 extern void
 123 sp_tile_cache_clear(struct softpipe_tile_cache *tc, const float *rgba,
 124                     uint clearValue);
 125
 126 extern struct softpipe_cached_tile *
 127 sp_find_cached_tile(struct softpipe_tile_cache *tc,
 128                     union tile_address addr );
 129
 130
 131 static INLINE union tile_address
 132 tile_address( unsigned x,
 133               unsigned y )
 134 {
 135    union tile_address addr;
 136
 137    addr.value = 0;
 138    addr.bits.x = x / TILE_SIZE;
 139    addr.bits.y = y / TILE_SIZE;
 140
 141    return addr;
 142 }
 143
 144 /* Quickly retrieve tile if it matches last lookup.
 145  */
 146 static INLINE struct softpipe_cached_tile *
 147 sp_get_cached_tile(struct softpipe_tile_cache *tc,
 148                    int x, int y )
 149 {
 150    union tile_address addr = tile_address( x, y );
 151
 152    if (tc->last_tile->addr.value == addr.value)
 153       return tc->last_tile;
 154
 155    return sp_find_cached_tile( tc, addr );
 156 }
 157
 158
 159
 160
 161 #endif /* SP_TILE_CACHE_H */
 162