GRASS GIS 7 Programmer's Manual  7.8.5(2020)-exported
pngdriver/write.c
Go to the documentation of this file.
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 }
write_bmp
void write_bmp(void)
Definition: pngdriver/write_bmp.c:63
write_image
void write_image(void)
Definition: pngdriver/write.c:22
G_strcasecmp
int G_strcasecmp(const char *x, const char *y)
String compare ignoring case (upper or lower)
Definition: strings.c:46
png
struct png_state png
Definition: pngdriver/graph_set.c:32
G_fatal_error
void G_fatal_error(const char *msg,...)
Print a fatal error message to stderr.
Definition: gis/error.c:160
png_state::modified
int modified
Definition: pngdriver.h:47
png_state::mapped
int mapped
Definition: pngdriver.h:37
png_state::has_alpha
int has_alpha
Definition: pngdriver.h:36
png_state::file_name
char * file_name
Definition: pngdriver.h:33
write_ppm
void write_ppm(void)
Definition: pngdriver/write_ppm.c:21
write_pgm
void write_pgm(void)
Definition: pngdriver/write_ppm.c:49
pngdriver.h
GRASS png display driver - header file.
write_png
void write_png(void)
Definition: write_png.c:56