/* Read and write formatted images to memory.
 *
 * Compile with: 
 *
 * 	gcc -g -Wall new-from-buffer.c `pkg-config vips --cflags --libs`
 *
 */

#include <vips/vips.h>

int 
main( int argc, char **argv )
{
	gchar *buf;
	gsize len;
	int i;

	if( VIPS_INIT( argv[0] ) )
		vips_error_exit( NULL );

        if( argc != 2 ) 
		vips_error_exit( "usage: %s FILENAME", argv[0] ); 

	if( !g_file_get_contents( argv[1], &buf, &len, NULL ) )
		vips_error_exit( NULL );

	for( i = 0; i < 10; i++ ) {
		VipsImage *image;
		void *new_buf;
		size_t new_len;

		printf( "loop %d ...\n", i );

		if( !(image = vips_image_new_from_buffer( buf, len, "", 
			"access", VIPS_ACCESS_SEQUENTIAL,
			NULL )) ) 
			vips_error_exit( NULL );

		if( vips_image_write_to_buffer( image, 
			".jpg", &new_buf, &new_len, 
			"Q", 95,
			NULL ) ) 
			vips_error_exit( NULL );

		g_object_unref( image );
		g_free( new_buf );
	}

	g_free( buf );

	vips_shutdown();

	return( 0 );
}