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 /* make sure max texture size works */
52 assert((TILE_SIZE << TEX_ADDR_BITS) >= (1 << (SP_MAX_TEXTURE_2D_LEVELS-1)));
54 tc = CALLOC_STRUCT( softpipe_tex_tile_cache );
57 for (pos = 0; pos < NUM_ENTRIES; pos++) {
58 tc->entries[pos].addr.bits.invalid = 1;
60 tc->last_tile = &tc->entries[0]; /* any tile */
67 sp_destroy_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
72 for (pos = 0; pos < NUM_ENTRIES; pos++) {
73 /*assert(tc->entries[pos].x < 0);*/
76 tc->pipe->transfer_destroy(tc->pipe, tc->transfer);
79 tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
90 sp_tex_tile_cache_map_transfers(struct softpipe_tex_tile_cache *tc)
92 if (tc->tex_trans && !tc->tex_trans_map)
93 tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
98 sp_tex_tile_cache_unmap_transfers(struct softpipe_tex_tile_cache *tc)
100 if (tc->tex_trans_map) {
101 tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
102 tc->tex_trans_map = NULL;
107 * Invalidate all cached tiles for the cached texture.
108 * Should be called when the texture is modified.
111 sp_tex_tile_cache_validate_texture(struct softpipe_tex_tile_cache *tc)
118 for (i = 0; i < NUM_ENTRIES; i++) {
119 tc->entries[i].addr.bits.invalid = 1;
124 sp_tex_tile_is_compat_view(struct softpipe_tex_tile_cache *tc,
125 struct pipe_sampler_view *view)
129 return (tc->texture == view->texture &&
130 tc->format == view->format &&
131 tc->swizzle_r == view->swizzle_r &&
132 tc->swizzle_g == view->swizzle_g &&
133 tc->swizzle_b == view->swizzle_b &&
134 tc->swizzle_a == view->swizzle_a);
138 * Specify the sampler view to cache.
141 sp_tex_tile_cache_set_sampler_view(struct softpipe_tex_tile_cache *tc,
142 struct pipe_sampler_view *view)
144 struct pipe_resource *texture = view ? view->texture : NULL;
147 assert(!tc->transfer);
149 if (!sp_tex_tile_is_compat_view(tc, view)) {
150 pipe_resource_reference(&tc->texture, texture);
153 if (tc->tex_trans_map) {
154 tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
155 tc->tex_trans_map = NULL;
158 tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
159 tc->tex_trans = NULL;
163 tc->swizzle_r = view->swizzle_r;
164 tc->swizzle_g = view->swizzle_g;
165 tc->swizzle_b = view->swizzle_b;
166 tc->swizzle_a = view->swizzle_a;
167 tc->format = view->format;
170 /* mark as entries as invalid/empty */
171 /* XXX we should try to avoid this when the teximage hasn't changed */
172 for (i = 0; i < NUM_ENTRIES; i++) {
173 tc->entries[i].addr.bits.invalid = 1;
176 tc->tex_face = -1; /* any invalid value here */
184 * Flush the tile cache: write all dirty tiles back to the transfer.
185 * any tiles "flagged" as cleared will be "really" cleared.
188 sp_flush_tex_tile_cache(struct softpipe_tex_tile_cache *tc)
193 /* caching a texture, mark all entries as empty */
194 for (pos = 0; pos < NUM_ENTRIES; pos++) {
195 tc->entries[pos].addr.bits.invalid = 1;
204 * Given the texture face, level, zslice, x and y values, compute
205 * the cache entry position/index where we'd hope to find the
206 * cached texture tile.
207 * This is basically a direct-map cache.
208 * XXX There's probably lots of ways in which we can improve this.
211 tex_cache_pos( union tex_tile_address addr )
213 uint entry = (addr.bits.x +
217 addr.bits.level * 7);
219 return entry % NUM_ENTRIES;
223 * Similar to sp_get_cached_tile() but for textures.
224 * Tiles are read-only and indexed with more params.
226 const struct softpipe_tex_cached_tile *
227 sp_find_cached_tile_tex(struct softpipe_tex_tile_cache *tc,
228 union tex_tile_address addr )
230 struct softpipe_tex_cached_tile *tile;
232 tile = tc->entries + tex_cache_pos( addr );
234 if (addr.value != tile->addr.value) {
236 /* cache miss. Most misses are because we've invaldiated the
237 * texture cache previously -- most commonly on binding a new
238 * texture. Currently we effectively flush the cache on texture
242 _debug_printf("miss at %u: x=%d y=%d z=%d face=%d level=%d\n"
243 " tile %u: x=%d y=%d z=%d face=%d level=%d\n",
244 pos, x/TILE_SIZE, y/TILE_SIZE, z, face, level,
245 pos, tile->addr.bits.x, tile->addr.bits.y, tile->z, tile->face, tile->level);
248 /* check if we need to get a new transfer */
249 if (!tc->tex_trans ||
250 tc->tex_face != addr.bits.face ||
251 tc->tex_level != addr.bits.level ||
252 tc->tex_z != addr.bits.z) {
253 /* get new transfer (view into texture) */
254 unsigned width, height, layer;
257 if (tc->tex_trans_map) {
258 tc->pipe->transfer_unmap(tc->pipe, tc->tex_trans);
259 tc->tex_trans_map = NULL;
262 tc->pipe->transfer_destroy(tc->pipe, tc->tex_trans);
263 tc->tex_trans = NULL;
266 width = u_minify(tc->texture->width0, addr.bits.level);
267 if (tc->texture->target == PIPE_TEXTURE_1D_ARRAY) {
268 height = tc->texture->array_size;
272 height = u_minify(tc->texture->height0, addr.bits.level);
273 layer = addr.bits.face + addr.bits.z;
277 pipe_get_transfer(tc->pipe, tc->texture,
280 PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED,
281 0, 0, width, height);
283 tc->tex_trans_map = tc->pipe->transfer_map(tc->pipe, tc->tex_trans);
285 tc->tex_face = addr.bits.face;
286 tc->tex_level = addr.bits.level;
287 tc->tex_z = addr.bits.z;
290 /* Get tile from the transfer (view into texture), explicitly passing
293 pipe_get_tile_rgba_format(tc->pipe,
295 addr.bits.x * TILE_SIZE,
296 addr.bits.y * TILE_SIZE,
300 (float *) tile->data.color);
305 tc->last_tile = tile;