src/gallium/auxiliary/util/u_surfaces.c

   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 #include "u_surfaces.h"
  28 #include "util/u_hash_table.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31
  32 struct pipe_surface *
  33 util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size,
  34                      struct pipe_screen *pscreen, struct pipe_resource *pt,
  35                      unsigned level, unsigned layer, unsigned flags)
  36 {
  37    struct pipe_surface *ps;
  38
  39    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  40    {    /* or 2D array */
  41       if(!us->u.hash)
  42          us->u.hash = cso_hash_create();
  43
  44       ps = cso_hash_iter_data(cso_hash_find(us->u.hash, (layer << 8) | level));
  45    }
  46    else
  47    {
  48       if(!us->u.array)
  49          us->u.array = CALLOC(pt->last_level + 1, sizeof(struct pipe_surface *));
  50       ps = us->u.array[level];
  51    }
  52
  53    if(ps)
  54    {
  55       p_atomic_inc(&ps->reference.count);
  56       return ps;
  57    }
  58
  59    ps = (struct pipe_surface *)CALLOC(1, surface_struct_size);
  60    if(!ps)
  61       return NULL;
  62
  63    pipe_surface_init(ps, pt, level, layer, flags);
  64
  65    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  66       cso_hash_insert(us->u.hash, (layer << 8) | level, ps);
  67    else
  68       us->u.array[level] = ps;
  69
  70    return ps;
  71 }
  72
  73 void
  74 util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps)
  75 {
  76    struct pipe_resource *pt = ps->texture;
  77    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  78    {    /* or 2D array */
  79       cso_hash_erase(us->u.hash, cso_hash_find(us->u.hash, (ps->u.tex.first_layer << 8) | ps->u.tex.level));
  80    }
  81    else
  82       us->u.array[ps->u.tex.level] = 0;
  83 }
  84
  85 void
  86 util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *))
  87 {
  88    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  89    {    /* or 2D array */
  90       if(us->u.hash)
  91       {
  92          struct cso_hash_iter iter;
  93          iter = cso_hash_first_node(us->u.hash);
  94          while (!cso_hash_iter_is_null(iter)) {
  95             destroy_surface(cso_hash_iter_data(iter));
  96             iter = cso_hash_iter_next(iter);
  97          }
  98
  99          cso_hash_delete(us->u.hash);
 100          us->u.hash = NULL;
 101       }
 102    }
 103    else
 104    {
 105       if(us->u.array)
 106       {
 107          unsigned i;
 108          for(i = 0; i <= pt->last_level; ++i)
 109          {
 110             struct pipe_surface *ps = us->u.array[i];
 111             if(ps)
 112                destroy_surface(ps);
 113          }
 114          FREE(us->u.array);
 115          us->u.array = NULL;
 116       }
 117    }
 118 }