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Member "mesa-20.1.8/src/gallium/auxiliary/util/u_viewport.h" (16 Sep 2020, 1900 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 /**************************************************************************
    2  *
    3  * Copyright 2016 Ilia Mirkin.
    4  * All Rights Reserved.
    5  *
    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,
   10  * distribute, sub license, and/or sell copies of the Software, and to
   11  * permit persons to whom the Software is furnished to do so, subject to
   12  * the following conditions:
   13  *
   14  * The above copyright notice and this permission notice (including the
   15  * next paragraph) shall be included in all copies or substantial portions
   16  * of the Software.
   17  *
   18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
   21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
   22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   25  *
   26  **************************************************************************/
   27 
   28 #ifndef U_VIEWPORT_H
   29 #define U_VIEWPORT_H
   30 
   31 #include "c99_compat.h"
   32 #include "pipe/p_state.h"
   33 
   34 #ifdef __cplusplus
   35 extern "C" {
   36 #endif
   37 
   38 static inline void
   39 util_viewport_zmin_zmax(const struct pipe_viewport_state *vp, bool halfz,
   40                         float *zmin, float *zmax)
   41 {
   42    float a, b;
   43    if (halfz) {
   44       a = vp->translate[2];
   45       b = vp->translate[2] + vp->scale[2];
   46    } else {
   47       a = vp->translate[2] - vp->scale[2];
   48       b = vp->translate[2] + vp->scale[2];
   49    }
   50 
   51    *zmin = a < b ? a : b;
   52    *zmax = a < b ? b : a;
   53 }
   54 
   55 #ifdef __cplusplus
   56 }
   57 #endif
   58 
   59 #endif