src/gallium/auxiliary/util/u_surfaces.c

   1 #include "u_surfaces.h"
   2 #include "util/u_hash_table.h"
   3 #include "util/u_inlines.h"
   4 #include "util/u_memory.h"
   5
   6 struct pipe_surface *
   7 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)
   8 {
   9    struct pipe_surface *ps;
  10
  11    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  12    {    /* or 2D array */
  13       if(!us->u.hash)
  14          us->u.hash = cso_hash_create();
  15
  16       ps = cso_hash_iter_data(cso_hash_find(us->u.hash, ((zslice + face) << 8) | level));
  17    }
  18    else
  19    {
  20       if(!us->u.array)
  21          us->u.array = CALLOC(pt->last_level + 1, sizeof(struct pipe_surface *));
  22       ps = us->u.array[level];
  23    }
  24
  25    if(ps)
  26    {
  27       p_atomic_inc(&ps->reference.count);
  28       return ps;
  29    }
  30
  31    ps = (struct pipe_surface *)CALLOC(1, surface_struct_size);
  32    if(!ps)
  33       return NULL;
  34
  35    pipe_surface_init(ps, pt, face, level, zslice, flags);
  36    ps->offset = ~0;
  37
  38    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  39       cso_hash_insert(us->u.hash, ((zslice + face) << 8) | level, ps);
  40    else
  41       us->u.array[level] = ps;
  42
  43    return ps;
  44 }
  45
  46 void
  47 util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps)
  48 {
  49    struct pipe_resource *pt = ps->texture;
  50    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  51    {    /* or 2D array */
  52       cso_hash_erase(us->u.hash, cso_hash_find(us->u.hash, ((ps->zslice + ps->face) << 8) | ps->level));
  53    }
  54    else
  55       us->u.array[ps->level] = 0;
  56 }
  57
  58 void
  59 util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *))
  60 {
  61    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  62    {    /* or 2D array */
  63       if(us->u.hash)
  64       {
  65          struct cso_hash_iter iter;
  66          iter = cso_hash_first_node(us->u.hash);
  67          while (!cso_hash_iter_is_null(iter)) {
  68             destroy_surface(cso_hash_iter_data(iter));
  69             iter = cso_hash_iter_next(iter);
  70          }
  71
  72          cso_hash_delete(us->u.hash);
  73          us->u.hash = NULL;
  74       }
  75    }
  76    else
  77    {
  78       if(us->u.array)
  79       {
  80          unsigned i;
  81          for(i = 0; i <= pt->last_level; ++i)
  82          {
  83             struct pipe_surface *ps = us->u.array[i];
  84             if(ps)
  85                destroy_surface(ps);
  86          }
  87          FREE(us->u.array);
  88          us->u.array = NULL;
  89       }
  90    }
  91 }