GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r72636
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pngdriver/set_window.c
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1 /*!
2  \file lib/pngdriver/set_window.c
3 
4  \brief GRASS png display driver - set window
5 
6  (C) 2007-2014 by Glynn Clements and the GRASS Development Team
7 
8  This program is free software under the GNU General Public License
9  (>=v2). Read the file COPYING that comes with GRASS for details.
10 
11  \author Per Henrik Johansen (original contributor)
12  \author Glynn Clements
13 */
14 
15 #include <math.h>
16 #include "pngdriver.h"
17 
18 /*!
19  \brief Set window
20 
21  \param t,b,l,r top, bottom, left, right
22 */
23 void PNG_Set_window(double t, double b, double l, double r)
24 {
25  png.clip_top = t > 0 ? t : 0;
26  png.clip_bot = b < png.height ? b : png.height;
27  png.clip_left = l > 0 ? l : 0;
28  png.clip_rite = r < png.width ? r : png.width;
29 }
int width
Definition: pngdriver.h:43
double clip_left
Definition: pngdriver.h:42
GRASS png display driver - header file.
int height
Definition: pngdriver.h:43
double clip_top
Definition: pngdriver.h:42
double clip_rite
Definition: pngdriver.h:42
double clip_bot
Definition: pngdriver.h:42
struct png_state png
double l
Definition: r_raster.c:39
double t
Definition: r_raster.c:39
double b
Definition: r_raster.c:39
void PNG_Set_window(double, double, double, double)
Set window.
double r
Definition: r_raster.c:39