Print all image metadata with VIPS

metadata.c

/*

Print metadata with VIPS

COMPILE

gcc -o metadata metadata.c `pkg-config --libs --cflags vips`

RUN

./metadata

The "print_field_fn" function was taken and modified from libvips/vipsheader.c

https://github.com/libvips/libvips/blob/master/tools/vipsheader.c

*/

#include <vips/vips.h>

static void *
print_field_fn( VipsImage *image, const char *field, GValue *value, void *a )
{
	char str[256];
	VipsBuf buf = VIPS_BUF_STATIC( str );

	printf( "%s: ", field );

	vips_buf_appendgv( &buf, value );
	printf( "%s\n", vips_buf_all( &buf ) );

	return( NULL );
}

int main( int argc, char** argv )
{
	VipsImage *image;
	gboolean many = FALSE;

	VIPS_INIT( argv[0] );

	image = vips_image_new_temp_file( "a.jpg" );

	(void) vips_image_map( image, print_field_fn, NULL );

	return 0;
}