pngdriver/set_window.c

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/*!
   \file lib/pngdriver/set_window.c
 
   \brief GRASS png display driver - set window
 
   SPDX-FileCopyrightText: 2007-2014 Glynn Clements
   SPDX-FileCopyrightText: GRASS Development Team
   SPDX-License-Identifier: GPL-2.0-or-later
 
   \author Per Henrik Johansen (original contributor)
   \author Glynn Clements
 */
 
#include <math.h>
#include "pngdriver.h"
 
/*!
   \brief Set window
 
   \param t,b,l,r top, bottom, left, right
 */
void PNG_Set_window(double t, double b, double l, double r)
{
    png.clip_top = t > 0 ? t : 0;
    png.clip_bot = b < png.height ? b : png.height;
    png.clip_left = l > 0 ? l : 0;
    png.clip_rite = r < png.width ? r : png.width;
}