src/gallium/auxiliary/util/u_surfaces.h

   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 struct pipe_surface *util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size, struct pipe_screen *pscreen, struct pipe_resource *pt, unsigned face, unsigned level, unsigned zslice, unsigned flags);
  46
  47 /* fast inline path for the very common case */
  48 static INLINE struct pipe_surface *
  49 util_surfaces_get(struct util_surfaces *us, unsigned surface_struct_size, struct pipe_screen *pscreen, struct pipe_resource *pt, unsigned face, unsigned level, unsigned zslice, unsigned flags)
  50 {
  51    if(likely((pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT) && us->u.array))
  52    {
  53       struct pipe_surface *ps = us->u.array[level];
  54       if(ps)
  55       {
  56          p_atomic_inc(&ps->reference.count);
  57          return ps;
  58       }
  59    }
  60
  61    return util_surfaces_do_get(us, surface_struct_size, pscreen, pt, face, level, zslice, flags);
  62 }
  63
  64 static INLINE struct pipe_surface *
  65 util_surfaces_peek(struct util_surfaces *us, struct pipe_resource *pt, unsigned face, unsigned level, unsigned zslice)
  66 {
  67    if(!us->u.pv)
  68       return 0;
  69
  70    if(unlikely(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE))
  71       return cso_hash_iter_data(cso_hash_find(us->u.hash, ((zslice + face) << 8) | level));
  72    else
  73       return us->u.array[level];
  74 }
  75
  76 void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
  77
  78 static INLINE void
  79 util_surfaces_detach(struct util_surfaces *us, struct pipe_surface *ps)
  80 {
  81    if(likely(ps->texture->target == PIPE_TEXTURE_2D || ps->texture->target == PIPE_TEXTURE_RECT))
  82    {
  83       us->u.array[ps->level] = 0;
  84       return;
  85    }
  86
  87    util_surfaces_do_detach(us, ps);
  88 }
  89
  90 void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
  91
  92 #endif