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
35struct 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 */
46boolean
47util_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, unsigned flags,
50                     struct pipe_surface **res);
51
52/* fast inline path for the very common case */
53static INLINE boolean
54util_surfaces_get(struct util_surfaces *us, unsigned surface_struct_size,
55                  struct pipe_context *ctx, struct pipe_resource *pt,
56                  unsigned level, unsigned layer, unsigned flags,
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, flags, res);
71}
72
73static INLINE struct pipe_surface *
74util_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
85void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
86
87static INLINE void
88util_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
99void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
100
101#endif
102