GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r72846
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pngdriver/write.c
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1 /*!
2  \file lib/pngdriver/write.c
3 
4  \brief GRASS png display driver - write image (lower level functions)
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 Glynn Clements
12 */
13 
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 
18 #include <grass/config.h>
19 #include <grass/gis.h>
20 #include "pngdriver.h"
21 
22 void write_image(void)
23 {
24  char *p = png.file_name + strlen(png.file_name) - 4;
25 
26  if (!png.modified)
27  return;
28 
29  if (png.mapped)
30  return;
31 
32  if (G_strcasecmp(p, ".ppm") == 0) {
33  write_ppm();
34  if (png.has_alpha)
35  write_pgm();
36  }
37  else if (G_strcasecmp(p, ".bmp") == 0)
38  write_bmp();
39 #ifdef HAVE_PNG_H
40  else if (G_strcasecmp(p, ".png") == 0)
41  write_png();
42 #endif
43  else
44  G_fatal_error("write_image: unknown file type: %s", p);
45 
46  png.modified = 0;
47 }
void write_pgm(void)
int G_strcasecmp(const char *x, const char *y)
String compare ignoring case (upper or lower)
Definition: strings.c:46
GRASS png display driver - header file.
void write_png(void)
Definition: write_png.c:56
void write_bmp(void)
void write_ppm(void)
struct png_state png
void G_fatal_error(const char *msg,...)
Print a fatal error message to stderr.
Definition: gis/error.c:160
int mapped
Definition: pngdriver.h:37
int modified
Definition: pngdriver.h:47
void write_image(void)
char * file_name
Definition: pngdriver.h:33
int has_alpha
Definition: pngdriver.h:36