src/gallium/auxiliary/util/u_surfaces.h

   1 #ifndef U_SURFACES_H_
   2 #define U_SURFACES_H_
   3
   4 #include "pipe/p_compiler.h"
   5 #include "pipe/p_state.h"
   6 #include "util/u_atomic.h"
   7 #include "cso_cache/cso_hash.h"
   8
   9 struct util_surfaces
  10 {
  11    union
  12    {
  13       struct cso_hash *hash;
  14       struct pipe_surface **array;
  15       void* pv;
  16    } u;
  17 };
  18
  19 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);
  20
  21 /* fast inline path for the very common case */
  22 static INLINE struct pipe_surface *
  23 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)
  24 {
  25    if(likely((pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT) && us->u.array))
  26    {
  27       struct pipe_surface *ps = us->u.array[level];
  28       if(ps)
  29       {
  30          p_atomic_inc(&ps->reference.count);
  31          return ps;
  32       }
  33    }
  34
  35    return util_surfaces_do_get(us, surface_struct_size, pscreen, pt, face, level, zslice, flags);
  36 }
  37
  38 static INLINE struct pipe_surface *
  39 util_surfaces_peek(struct util_surfaces *us, struct pipe_resource *pt, unsigned face, unsigned level, unsigned zslice)
  40 {
  41    if(!us->u.pv)
  42       return 0;
  43
  44    if(unlikely(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE))
  45       return cso_hash_iter_data(cso_hash_find(us->u.hash, ((zslice + face) << 8) | level));
  46    else
  47       return us->u.array[level];
  48 }
  49
  50 void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
  51
  52 static INLINE void
  53 util_surfaces_detach(struct util_surfaces *us, struct pipe_surface *ps)
  54 {
  55    if(likely(ps->texture->target == PIPE_TEXTURE_2D || ps->texture->target == PIPE_TEXTURE_RECT))
  56    {
  57       us->u.array[ps->level] = 0;
  58       return;
  59    }
  60
  61    util_surfaces_do_detach(us, ps);
  62 }
  63
  64 void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
  65
  66 #endif