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/**************************************************************************
*
* Copyright 2016 Ilia Mirkin.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef U_VIEWPORT_H
#define U_VIEWPORT_H
#include "c99_compat.h"
#include "pipe/p_state.h"
#ifdef __cplusplus
extern "C" {
#endif
static inline void
util_viewport_zmin_zmax(const struct pipe_viewport_state *vp, bool halfz,
float *zmin, float *zmax)
{
float a, b;
if (halfz) {
a = vp->translate[2];
b = vp->translate[2] + vp->scale[2];
} else {
a = vp->translate[2] - vp->scale[2];
b = vp->translate[2] + vp->scale[2];
}
*zmin = a < b ? a : b;
*zmax = a < b ? b : a;
}
#ifdef __cplusplus
}
#endif
#endif
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