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 **************************************************************************/
29 * Texture tile caching.
35 #include "util/u_inlines.h"
36 #include "util/u_memory.h"
37 #include "util/u_tile.h"
38 #include "util/u_math.h"
39 #include "sp_context.h"
40 #include "sp_texture.h"
41 #include "sp_tex_tile_cache.h"
45 struct softpipe_tex_tile_cache
*
46 sp_create_tex_tile_cache( struct pipe_context
*pipe
)
48 struct softpipe_tex_tile_cache
*tc
;
51 tc
= CALLOC_STRUCT( softpipe_tex_tile_cache
);
54 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
55 tc
->entries
[pos
].addr
.bits
.invalid
= 1;
57 tc
->last_tile
= &tc
->entries
[0]; /* any tile */
64 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache
*tc
)
68 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
69 /*assert(tc->entries[pos].x < 0);*/
72 tc
->pipe
->tex_transfer_destroy(tc
->pipe
, tc
->transfer
);
75 tc
->pipe
->tex_transfer_destroy(tc
->pipe
, tc
->tex_trans
);
85 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache
*tc
)
87 if (tc
->tex_trans
&& !tc
->tex_trans_map
)
88 tc
->tex_trans_map
= tc
->pipe
->transfer_map(tc
->pipe
, tc
->tex_trans
);
93 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache
*tc
)
95 if (tc
->tex_trans_map
) {
96 tc
->pipe
->transfer_unmap(tc
->pipe
, tc
->tex_trans
);
97 tc
->tex_trans_map
= NULL
;
102 * Invalidate all cached tiles for the cached texture.
103 * Should be called when the texture is modified.
106 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache
*tc
)
113 for (i
= 0; i
< NUM_ENTRIES
; i
++) {
114 tc
->entries
[i
].addr
.bits
.invalid
= 1;
119 * Specify the texture to cache.
122 sp_tex_tile_cache_set_texture(struct softpipe_tex_tile_cache
*tc
,
123 struct pipe_texture
*texture
)
127 assert(!tc
->transfer
);
129 if (tc
->texture
!= texture
) {
130 pipe_texture_reference(&tc
->texture
, texture
);
133 if (tc
->tex_trans_map
) {
134 tc
->pipe
->transfer_unmap(tc
->pipe
, tc
->tex_trans
);
135 tc
->tex_trans_map
= NULL
;
138 tc
->pipe
->tex_transfer_destroy(tc
->pipe
, tc
->tex_trans
);
139 tc
->tex_trans
= NULL
;
142 /* mark as entries as invalid/empty */
143 /* XXX we should try to avoid this when the teximage hasn't changed */
144 for (i
= 0; i
< NUM_ENTRIES
; i
++) {
145 tc
->entries
[i
].addr
.bits
.invalid
= 1;
148 tc
->tex_face
= -1; /* any invalid value here */
156 * Flush the tile cache: write all dirty tiles back to the transfer.
157 * any tiles "flagged" as cleared will be "really" cleared.
160 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache
*tc
)
165 /* caching a texture, mark all entries as empty */
166 for (pos
= 0; pos
< NUM_ENTRIES
; pos
++) {
167 tc
->entries
[pos
].addr
.bits
.invalid
= 1;
176 * Given the texture face, level, zslice, x and y values, compute
177 * the cache entry position/index where we'd hope to find the
178 * cached texture tile.
179 * This is basically a direct-map cache.
180 * XXX There's probably lots of ways in which we can improve this.
183 tex_cache_pos( union tex_tile_address addr
)
185 uint entry
= (addr
.bits
.x
+
189 addr
.bits
.level
* 7);
191 return entry
% NUM_ENTRIES
;
195 * Similar to sp_get_cached_tile() but for textures.
196 * Tiles are read-only and indexed with more params.
198 const struct softpipe_tex_cached_tile
*
199 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache
*tc
,
200 union tex_tile_address addr
)
202 struct softpipe_tex_cached_tile
*tile
;
204 tile
= tc
->entries
+ tex_cache_pos( addr
);
206 if (addr
.value
!= tile
->addr
.value
) {
208 /* cache miss. Most misses are because we've invaldiated the
209 * texture cache previously -- most commonly on binding a new
210 * texture. Currently we effectively flush the cache on texture
214 _debug_printf("miss at %u: x=%d y=%d z=%d face=%d level=%d\n"
215 " tile %u: x=%d y=%d z=%d face=%d level=%d\n",
216 pos
, x
/TILE_SIZE
, y
/TILE_SIZE
, z
, face
, level
,
217 pos
, tile
->addr
.bits
.x
, tile
->addr
.bits
.y
, tile
->z
, tile
->face
, tile
->level
);
220 /* check if we need to get a new transfer */
221 if (!tc
->tex_trans
||
222 tc
->tex_face
!= addr
.bits
.face
||
223 tc
->tex_level
!= addr
.bits
.level
||
224 tc
->tex_z
!= addr
.bits
.z
) {
225 /* get new transfer (view into texture) */
228 if (tc
->tex_trans_map
) {
229 tc
->pipe
->transfer_unmap(tc
->pipe
, tc
->tex_trans
);
230 tc
->tex_trans_map
= NULL
;
233 tc
->pipe
->tex_transfer_destroy(tc
->pipe
, tc
->tex_trans
);
234 tc
->tex_trans
= NULL
;
238 tc
->pipe
->get_tex_transfer(tc
->pipe
, tc
->texture
,
242 PIPE_TRANSFER_READ
, 0, 0,
243 u_minify(tc
->texture
->width0
, addr
.bits
.level
),
244 u_minify(tc
->texture
->height0
, addr
.bits
.level
));
246 tc
->tex_trans_map
= tc
->pipe
->transfer_map(tc
->pipe
, tc
->tex_trans
);
248 tc
->tex_face
= addr
.bits
.face
;
249 tc
->tex_level
= addr
.bits
.level
;
250 tc
->tex_z
= addr
.bits
.z
;
253 /* get tile from the transfer (view into texture) */
254 pipe_get_tile_rgba(tc
->pipe
,
256 addr
.bits
.x
* TILE_SIZE
,
257 addr
.bits
.y
* TILE_SIZE
,
258 TILE_SIZE
, TILE_SIZE
,
259 (float *) tile
->data
.color
);
263 tc
->last_tile
= tile
;