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Diffstat (limited to 'src/mesa/state_tracker/st_cache.c')
-rw-r--r-- | src/mesa/state_tracker/st_cache.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cache.c b/src/mesa/state_tracker/st_cache.c new file mode 100644 index 0000000000..0205b1cab3 --- /dev/null +++ b/src/mesa/state_tracker/st_cache.c @@ -0,0 +1,61 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + /* + * Authors: + * Zack Rusin <zack@tungstengraphics.com> + */ + +#include "st_cache.h" + +#include "st_context.h" + +#include "pipe/p_state.h" + +#include "cso_cache/cso_cache.h" +#include "cso_cache/cso_hash.h" + +/* This function will either find the state of the given template + * in the cache or it will create a new state state from the given + * template, will insert it in the cache and return it. + */ +struct pipe_blend_state * st_cached_blend_state( + struct st_context *st, + const struct pipe_blend_state *blend) +{ + unsigned hash_key = cso_construct_key((void*)blend, sizeof(struct pipe_blend_state)); + struct cso_hash_iter iter = cso_find_state_template(st->cache, + hash_key, CSO_BLEND, + (void*)blend); + if (cso_hash_iter_is_null(iter)) { + const struct pipe_blend_state *created_state = st->pipe->create_blend_state( + st->pipe, blend); + iter = cso_insert_state(st->cache, hash_key, CSO_BLEND, + (void*)created_state); + } + return (struct pipe_blend_state*)(cso_hash_iter_data(iter)); +} |