src/gallium/auxiliary/util/u_resource.c

   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/format/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    unsigned samples = MAX2(1, res->nr_samples);
  46
  47    for (level = 0; level <= res->last_level; level++) {
  48       unsigned slices;
  49
  50       if (res->target == PIPE_TEXTURE_CUBE)
  51          slices = 6;
  52       else if (res->target == PIPE_TEXTURE_3D)
  53          slices = depth;
  54       else
  55          slices = res->array_size;
  56
  57       size += (util_format_get_nblocksy(res->format, height) *
  58                util_format_get_stride(res->format, width) * slices * samples);
  59
  60       width  = u_minify(width, 1);
  61       height = u_minify(height, 1);
  62       depth = u_minify(depth, 1);
  63    }
  64
  65    return size;
  66 }