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