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  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. /* Return value indicates if the pipe surface result is new */
  46. boolean
  47. util_surfaces_do_get(struct util_surfaces *us, unsigned surface_struct_size,
  48.                      struct pipe_context *ctx, struct pipe_resource *pt,
  49.                      unsigned level, unsigned layer,
  50.                      struct pipe_surface **res);
  51.  
  52. /* fast inline path for the very common case */
  53. static INLINE boolean
  54. util_surfaces_get(struct util_surfaces *us, unsigned surface_struct_size,
  55.                   struct pipe_context *ctx, struct pipe_resource *pt,
  56.                   unsigned level, unsigned layer,
  57.                   struct pipe_surface **res)
  58. {
  59.    if(likely((pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT) && us->u.array))
  60.    {
  61.       struct pipe_surface *ps = us->u.array[level];
  62.       if(ps && ps->context == ctx)
  63.       {
  64.          p_atomic_inc(&ps->reference.count);
  65.          *res = ps;
  66.          return FALSE;
  67.       }
  68.    }
  69.  
  70.    return util_surfaces_do_get(us, surface_struct_size, ctx, pt, level, layer, res);
  71. }
  72.  
  73. static INLINE struct pipe_surface *
  74. util_surfaces_peek(struct util_surfaces *us, struct pipe_resource *pt, unsigned level, unsigned layer)
  75. {
  76.    if(!us->u.pv)
  77.       return 0;
  78.  
  79.    if(unlikely(pt->target == PIPE_TEXTURE_3D || pt->target == PIPE_TEXTURE_CUBE))
  80.       return cso_hash_iter_data(cso_hash_find(us->u.hash, (layer << 8) | level));
  81.    else
  82.       return us->u.array[level];
  83. }
  84.  
  85. void util_surfaces_do_detach(struct util_surfaces *us, struct pipe_surface *ps);
  86.  
  87. static INLINE void
  88. util_surfaces_detach(struct util_surfaces *us, struct pipe_surface *ps)
  89. {
  90.    if(likely(ps->texture->target == PIPE_TEXTURE_2D || ps->texture->target == PIPE_TEXTURE_RECT))
  91.    {
  92.       us->u.array[ps->u.tex.level] = 0;
  93.       return;
  94.    }
  95.  
  96.    util_surfaces_do_detach(us, ps);
  97. }
  98.  
  99. void util_surfaces_destroy(struct util_surfaces *us, struct pipe_resource *pt, void (*destroy_surface) (struct pipe_surface *));
  100.  
  101. #endif
  102.