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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/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
util_resource_size(const struct pipe_resource * res)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 }
67