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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
util_surfaces_get(struct util_surfaces * us,unsigned surface_struct_size,struct pipe_context * ctx,struct pipe_resource * pt,unsigned level,unsigned layer,struct pipe_surface ** res)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 *
util_surfaces_peek(struct util_surfaces * us,struct pipe_resource * pt,unsigned level,unsigned layer)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
util_surfaces_detach(struct util_surfaces * us,struct pipe_surface * ps)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