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/* Example showing how to call a couple of vips functions using an input
* image file and creating an output file
* also gathers some info on the input image
*/
#include <stdio.h>
#include <vips/vips.h>
int
main(int argc, char **argv)
{
VipsImage *in;
double mean;
VipsImage *out;
if (VIPS_INIT(argv[0]))
vips_error_exit(NULL);
if (argc != 3)
vips_error_exit("usage: %s infile outfile", argv[0]);
if (!(in = vips_image_new_from_file(argv[1], NULL)))
vips_error_exit(NULL);
printf("image width = %d\n", vips_image_get_width(in));
if (vips_avg(in, &mean, NULL))
vips_error_exit(NULL);
printf("mean pixel value = %g\n", mean);
/* generate photo nexative - replace with other vips_ funcs */
if (vips_invert(in, &out, NULL))
vips_error_exit(NULL);
g_object_unref(in);
if (vips_image_write_to_file(out, argv[2], NULL))
vips_error_exit(NULL);
g_object_unref(out);
return 0;
}
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