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softpipe: some improvements to texture tile cache

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Use a somewhat better function in tex_cache_pos() to get better caching.

Increase number of cache entries to 50.

Also fix a texture invalidation bug.  If texture is marked as modified,
invalidate all texture tiles.
This commit is contained in:
Brian Paul
2009-02-16 18:45:58 -07:00
parent b9de2089b1
commit 07855a1d76
1 changed files with 12 additions and 4 deletions
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16
src/gallium/drivers/softpipe/sp_tile_cache.c
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@@ -40,7 +40,7 @@
#include "sp_texture.h" #include "sp_texture.h"
#include "sp_tile_cache.h" #include "sp_tile_cache.h"
#define NUM_ENTRIES 32 #define NUM_ENTRIES 50
/** XXX move these */ /** XXX move these */
@@ -484,7 +484,7 @@ sp_get_cached_tile(struct softpipe_context *softpipe,
static INLINE uint static INLINE uint
tex_cache_pos(int x, int y, int z, int face, int level) tex_cache_pos(int x, int y, int z, int face, int level)
{ {
uint entry = x + y * 5 + z * 4 + face + level; uint entry = x + y * 9 + z * 3 + face + level * 7;
return entry % NUM_ENTRIES; return entry % NUM_ENTRIES;
} }
@@ -510,8 +510,12 @@ sp_get_cached_tile_tex(struct softpipe_context *sp,
if (tc->texture) { if (tc->texture) {
struct softpipe_texture *spt = softpipe_texture(tc->texture); struct softpipe_texture *spt = softpipe_texture(tc->texture);
if (spt->modified) { if (spt->modified) {
/* texture was modified, force a cache reload */ /* texture was modified, invalidate all cached tiles */
tile->x = -1; uint p;
for (p = 0; p < NUM_ENTRIES; p++) {
tile = tc->entries + p;
tile->x = -1;
}
spt->modified = FALSE; spt->modified = FALSE;
} }
} }
@@ -523,6 +527,10 @@ sp_get_cached_tile_tex(struct softpipe_context *sp,
level != tile->level) { level != tile->level) {
/* cache miss */ /* cache miss */
#if 0
printf("miss at %u x=%d y=%d z=%d face=%d level=%d\n", pos,
x/TILE_SIZE, y/TILE_SIZE, z, face, level);
#endif
/* check if we need to get a new surface */ /* check if we need to get a new surface */
if (!tc->tex_surf || if (!tc->tex_surf ||
tc->tex_face != face || tc->tex_face != face ||