1 /**************************************************************************
3 * Copyright 2016 Ilia Mirkin.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
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11 * permit persons to whom the Software is furnished to do so, subject to
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14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
31 #include "c99_compat.h"
32 #include "pipe/p_state.h"
39 util_viewport_zmin_zmax(const struct pipe_viewport_state
*vp
, bool halfz
,
40 float *zmin
, float *zmax
)
45 b
= vp
->translate
[2] + vp
->scale
[2];
47 a
= vp
->translate
[2] - vp
->scale
[2];
48 b
= vp
->translate
[2] + vp
->scale
[2];
51 *zmin
= a
< b
? a
: b
;
52 *zmax
= a
< b
? b
: a
;