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 /* TODO: ouch, util_hash_table should do these by default when passed a null function pointer
   7  * this indirect function call is quite bad
   8  */
   9 static unsigned
  10 hash(void *key)
  11 {
  12    return (unsigned)(uintptr_t)key;
  13 }
  14
  15 static int
  16 compare(void *key1, void *key2)
  17 {
  18    return (unsigned)(uintptr_t)key1 - (unsigned)(uintptr_t)key2;
  19 }
  20
  21 struct pipe_surface *
  22 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)
  23 {
  24    struct pipe_surface *ps;
  25    void *key = NULL;
  26
  27    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  28    {    /* or 2D array */
  29       if(!us->u.table)
  30          us->u.table = util_hash_table_create(hash, compare);
  31       key = (void *)(((zslice + face) << 8) | level);
  32       /* TODO: ouch, should have a get-reference function...
  33        * also, shouldn't allocate a two-pointer structure for each item... */
  34       ps = util_hash_table_get(us->u.table, key);
  35    }
  36    else
  37    {
  38       if(!us->u.array)
  39          us->u.array = CALLOC(pt->last_level + 1, sizeof(struct pipe_surface *));
  40       ps = us->u.array[level];
  41    }
  42
  43    if(ps)
  44    {
  45       p_atomic_inc(&ps->reference.count);
  46       return ps;
  47    }
  48
  49    ps = (struct pipe_surface *)CALLOC(1, surface_struct_size);
  50    if(!ps)
  51       return NULL;
  52
  53    pipe_surface_init(ps, pt, face, level, zslice, flags);
  54    ps->offset = ~0;
  55
  56    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  57       util_hash_table_set(us->u.table, key, ps);
  58    else
  59       us->u.array[level] = ps;
  60
  61    return ps;
  62 }
  63
  64 void
  65 util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps)
  66 {
  67    struct pipe_resource *pt = ps->texture;
  68    if(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE)
  69    {    /* or 2D array */
  70       void* key = (void*)(uintptr_t)(((ps->zslice + ps->face) << 8) | ps->level);
  71       util_hash_table_remove(us->u.table, key);
  72    }
  73    else
  74       us->u.array[ps->level] = 0;
  75 }
  76
  77 static enum pipe_error
  78 util_surfaces_destroy_callback(void *key, void *value, void *data)
  79 {
  80    void (*destroy_surface) (struct pipe_surface * ps) = data;
  81    destroy_surface((struct pipe_surface *)value);
  82    return PIPE_OK;
  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.table)
  91       {
  92          util_hash_table_foreach(us->u.table, util_surfaces_destroy_callback, destroy_surface);
  93          util_hash_table_destroy(us->u.table);
  94          us->u.table = NULL;
  95       }
  96    }
  97    else
  98    {
  99       if(us->u.array)
 100       {
 101          unsigned i;
 102          for(i = 0; i < pt->last_level; ++i)
 103          {
 104             struct pipe_surface *ps = us->u.array[i];
 105             if(ps)
 106                destroy_surface(ps);
 107          }
 108          FREE(us->u.array);
 109          us->u.array = NULL;
 110       }
 111    }
 112 }