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      1 /**************************************************************************
      2  *
      3  * Copyright 2010 Luca Barbieri
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining
      6  * a copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sublicense, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial
     15  * portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  *
     25  **************************************************************************/
     26 
     27 #ifndef U_SURFACES_H_
     28 #define U_SURFACES_H_
     29 
     30 #include "pipe/p_compiler.h"
     31 #include "pipe/p_state.h"
     32 #include "util/u_atomic.h"
     33 #include "cso_cache/cso_hash.h"
     34 
     35 struct util_surfaces
     36 {
     37    union
     38    {
     39       struct cso_hash *hash;
     40       struct pipe_surface **array;
     41       void* pv;
     42    } u;
     43 };
     44 
     45 /* Return value indicates if the pipe surface result is new */
     46 boolean
     47 util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size,
     48                      struct pipe_context *ctx, struct pipe_resource *pt,
     49                      unsigned level, unsigned layer,
     50                      struct pipe_surface **res);
     51 
     52 /* fast inline path for the very common case */
     53 static inline boolean
     54 util_surfaces_get(struct util_surfaces *us, unsigned surface_struct_size,
     55                   struct pipe_context *ctx, struct pipe_resource *pt,
     56                   unsigned level, unsigned layer,
     57                   struct pipe_surface **res)
     58 {
     59    if(likely((pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT) && us->u.array))
     60    {
     61       struct pipe_surface *ps = us->u.array[level];
     62       if(ps && ps->context == ctx)
     63       {
     64 	 p_atomic_inc(&ps->reference.count);
     65 	 *res = ps;
     66 	 return FALSE;
     67       }
     68    }
     69 
     70    return util_surfaces_do_get(us, surface_struct_size, ctx, pt, level, layer, res);
     71 }
     72 
     73 static inline struct pipe_surface *
     74 util_surfaces_peek(struct util_surfaces *us, struct pipe_resource *pt, unsigned level, unsigned layer)
     75 {
     76    if(!us->u.pv)
     77       return 0;
     78 
     79    if(unlikely(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE))
     80       return cso_hash_iter_data(cso_hash_find(us->u.hash, (layer << 8) | level));
     81    else
     82       return us->u.array[level];
     83 }
     84 
     85 void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
     86 
     87 static inline void
     88 util_surfaces_detach(struct util_surfaces *us, struct pipe_surface *ps)
     89 {
     90    if(likely(ps->texture->target == PIPE_TEXTURE_2D || ps->texture->target == PIPE_TEXTURE_RECT))
     91    {
     92       us->u.array[ps->u.tex.level] = 0;
     93       return;
     94    }
     95 
     96    util_surfaces_do_detach(us, ps);
     97 }
     98 
     99 void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
    100 
    101 #endif
    102