pngdriver/set_window.c

Go to the documentation of this file.

/*!
   \file lib/pngdriver/set_window.c
 
   \brief GRASS png display driver - set window
 
   (C) 2007-2014 by Glynn Clements and the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \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;
}