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
36struct softpipe_context;
37struct 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 */
53union 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
66struct 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
78struct 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
103extern struct softpipe_tex_tile_cache *
104sp_create_tex_tile_cache( struct pipe_context *pipe );
105
106extern void
107sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
108
109
110extern void
111sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
112
113extern void
114sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
115
116extern void
117sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
118                                   struct pipe_sampler_view *view);
119
120void
121sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
122
123extern void
124sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
125
126
127
128extern const struct softpipe_tex_cached_tile *
129sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
130                         union tex_tile_address addr );
131
132static INLINE union tex_tile_address
133tex_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 */
153static INLINE const struct softpipe_tex_cached_tile *
154sp_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