1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 #ifndef SP_TEX_TILE_CACHE_H
29 #define SP_TEX_TILE_CACHE_H
32 #include "pipe/p_compiler.h"
33 #include "sp_limits.h"
36 struct softpipe_context;
37 struct softpipe_tex_tile_cache;
41 * Cache tile size (width and height). This needs to be a power of two.
43 #define TILE_SIZE_LOG2 6
44 #define TILE_SIZE (1 << TILE_SIZE_LOG2)
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)
51 * Texture tile address as a union for fast compares.
53 union tex_tile_address {
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 */
66 struct softpipe_tex_cached_tile
68 union tex_tile_address addr;
70 float color[TILE_SIZE][TILE_SIZE][4];
74 #define NUM_ENTRIES 50
76 struct softpipe_tex_tile_cache
78 struct pipe_context *pipe;
79 struct pipe_transfer *transfer;
82 struct pipe_resource *texture; /**< if caching a texture */
85 struct softpipe_tex_cached_tile entries[NUM_ENTRIES];
87 struct pipe_transfer *tex_trans;
89 int tex_face, tex_level, tex_z;
95 enum pipe_format format;
97 struct softpipe_tex_cached_tile *last_tile; /**< most recently retrieved tile */
101 extern struct softpipe_tex_tile_cache *
102 sp_create_tex_tile_cache( struct pipe_context *pipe );
105 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
109 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc);
112 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc);
115 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
116 struct pipe_sampler_view *view);
119 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc);
122 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc);
126 extern const struct softpipe_tex_cached_tile *
127 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
128 union tex_tile_address addr );
130 static INLINE union tex_tile_address
131 tex_tile_address( unsigned x,
137 union tex_tile_address addr;
140 addr.bits.x = x / TILE_SIZE;
141 addr.bits.y = y / TILE_SIZE;
143 addr.bits.face = face;
144 addr.bits.level = level;
149 /* Quickly retrieve tile if it matches last lookup.
151 static INLINE const struct softpipe_tex_cached_tile *
152 sp_get_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
153 union tex_tile_address addr )
155 if (tc->last_tile->addr.value == addr.value)
156 return tc->last_tile;
158 return sp_find_cached_tile_tex( tc, addr );
162 #endif /* SP_TEX_TILE_CACHE_H */