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/**************************************************************************
*
* 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));
}
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