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  1. /*
  2.  * Copyright 2013 VMware, Inc.
  3.  * All Rights Reserved.
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * 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, sub license, 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 portions
  15.  * of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20.  * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
  21.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24.  */
  25.  
  26.  
  27. #include "pipe/p_defines.h"
  28. #include "pipe/p_state.h"
  29. #include "util/u_format.h"
  30. #include "util/u_math.h"
  31. #include "util/u_resource.h"
  32.  
  33.  
  34. /**
  35.  * Return the size of the resource in bytes.
  36.  */
  37. unsigned
  38. util_resource_size(const struct pipe_resource *res)
  39. {
  40.    unsigned width = res->width0;
  41.    unsigned height = res->height0;
  42.    unsigned depth = res->depth0;
  43.    unsigned size = 0;
  44.    unsigned level;
  45.  
  46.    for (level = 0; level <= res->last_level; level++) {
  47.       unsigned slices;
  48.  
  49.       if (res->target == PIPE_TEXTURE_CUBE)
  50.          slices = 6;
  51.       else if (res->target == PIPE_TEXTURE_3D)
  52.          slices = depth;
  53.       else
  54.          slices = res->array_size;
  55.  
  56.       size += (util_format_get_nblocksy(res->format, height) *
  57.                util_format_get_stride(res->format, width) * slices);
  58.  
  59.       width  = u_minify(width, 1);
  60.       height = u_minify(height, 1);
  61.       depth = u_minify(depth, 1);
  62.    }
  63.  
  64.    return size;
  65. }
  66.