pngdriver/write.c

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/*!
   \file lib/pngdriver/write.c
 
   \brief GRASS png display driver - write image (lower level functions)
 
   (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 Glynn Clements
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include <grass/config.h>
#include <grass/gis.h>
#include "pngdriver.h"
 
void write_image(void)
{
    char *p = png.file_name + strlen(png.file_name) - 4;
 
    if (!png.modified)
        return;
 
    if (png.mapped)
        return;
 
    if (G_strcasecmp(p, ".ppm") == 0) {
        write_ppm();
        if (png.has_alpha)
            write_pgm();
    }
    else if (G_strcasecmp(p, ".bmp") == 0)
        write_bmp();
#ifdef HAVE_PNG_H
    else if (G_strcasecmp(p, ".png") == 0)
        write_png();
#endif
    else
        G_fatal_error("write_image: unknown file type: %s", p);
 
    png.modified = 0;
}