summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/llvmpipe/lp_tex_cache.h
blob: f521b2ae0b93779ed64524143a74cfdb9a805a9e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#ifndef LP_TEX_CACHE_H
#define LP_TEX_CACHE_H


#include "pipe/p_compiler.h"


struct llvmpipe_context;
struct llvmpipe_tex_tile_cache;


/**
 * Cache tile size (width and height). This needs to be a power of two.
 */
#define TEX_TILE_SIZE 64


/* If we need to support > 4096, just expand this to be a 64 bit
 * union, or consider tiling in Z as well.
 */
union tex_tile_address {
   struct {
      unsigned x:6;             /* 4096 / TEX_TILE_SIZE */
      unsigned y:6;             /* 4096 / TEX_TILE_SIZE */
      unsigned z:12;            /* 4096 -- z not tiled */
      unsigned face:3;
      unsigned level:4;
      unsigned invalid:1;
   } bits;
   unsigned value;
};


struct llvmpipe_cached_tex_tile
{
   union tex_tile_address addr;
   float color[TEX_TILE_SIZE][TEX_TILE_SIZE][4];
};

#define NUM_ENTRIES 50


/** XXX move these */
#define MAX_TEX_WIDTH 2048
#define MAX_TEX_HEIGHT 2048


struct llvmpipe_tex_tile_cache
{
   struct pipe_screen *screen;
   struct pipe_surface *surface;  /**< the surface we're caching */
   struct pipe_transfer *transfer;
   void *transfer_map;

   struct pipe_texture *texture;  /**< if caching a texture */
   unsigned timestamp;

   struct llvmpipe_cached_tex_tile entries[NUM_ENTRIES];

   struct pipe_transfer *tex_trans;
   void *tex_trans_map;
   int tex_face, tex_level, tex_z;

   struct llvmpipe_cached_tex_tile *last_tile;  /**< most recently retrieved tile */
};


extern struct llvmpipe_tex_tile_cache *
lp_create_tex_tile_cache( struct pipe_screen *screen );

extern void
lp_destroy_tex_tile_cache(struct llvmpipe_tex_tile_cache *tc);

extern void
lp_tex_tile_cache_map_transfers(struct llvmpipe_tex_tile_cache *tc);

extern void
lp_tex_tile_cache_unmap_transfers(struct llvmpipe_tex_tile_cache *tc);

extern void
lp_tex_tile_cache_set_texture(struct llvmpipe_tex_tile_cache *tc,
                          struct pipe_texture *texture);

void
lp_tex_tile_cache_validate_texture(struct llvmpipe_tex_tile_cache *tc);

extern void
lp_flush_tex_tile_cache(struct llvmpipe_tex_tile_cache *tc);

extern const struct llvmpipe_cached_tex_tile *
lp_find_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
                        union tex_tile_address addr );

static INLINE const union tex_tile_address
tex_tile_address( unsigned x,
                  unsigned y,
                  unsigned z,
                  unsigned face,
                  unsigned level )
{
   union tex_tile_address addr;

   addr.value = 0;
   addr.bits.x = x / TEX_TILE_SIZE;
   addr.bits.y = y / TEX_TILE_SIZE;
   addr.bits.z = z;
   addr.bits.face = face;
   addr.bits.level = level;
      
   return addr;
}

/* Quickly retrieve tile if it matches last lookup.
 */
static INLINE const struct llvmpipe_cached_tex_tile *
lp_get_cached_tex_tile(struct llvmpipe_tex_tile_cache *tc,
                       union tex_tile_address addr )
{
   if (tc->last_tile->addr.value == addr.value)
      return tc->last_tile;

   return lp_find_cached_tex_tile( tc, addr );
}


#endif /* LP_TEX_CACHE_H */