/**
* Instantiate a downloader
*
* @v job Job control interface
* @v image Image to fill with downloaded file
* @v type Location type to pass to xfer_open()
* @v ... Remaining arguments to pass to xfer_open()
* @ret rc Return status code
*
* Instantiates a downloader object to download the specified URI into
* the specified image object.
*/
int create_downloader ( struct interface *job, struct image *image,
int type, ... ) {
struct downloader *downloader;
va_list args;
int rc;
/* Allocate and initialise structure */
downloader = zalloc ( sizeof ( *downloader ) );
if ( ! downloader )
return -ENOMEM;
ref_init ( &downloader->refcnt, downloader_free );
intf_init ( &downloader->job, &downloader_job_desc,
&downloader->refcnt );
intf_init ( &downloader->xfer, &downloader_xfer_desc,
&downloader->refcnt );
downloader->image = image_get ( image );
va_start ( args, type );
/* Instantiate child objects and attach to our interfaces */
if ( ( rc = xfer_vopen ( &downloader->xfer, type, args ) ) != 0 )
goto err;
/* Attach parent interface, mortalise self, and return */
intf_plug_plug ( &downloader->job, job );
ref_put ( &downloader->refcnt );
va_end ( args );
return 0;
err:
downloader_finished ( downloader, rc );
ref_put ( &downloader->refcnt );
va_end ( args );
return rc;
}
/**Capture an image, standardize and binarize it, and write it to a file*/
void image_save_binarized(char* filename){
struct fp_img* img = image_get();
fp_img_standardize(img);
struct fp_img* img_binarized = fp_img_binarize(img);
image_writefile(img_binarized, filename);
fp_img_free(img); //free it
fp_img_free(img_binarized);
}
void image_map(image* i, vec4(*f)(vec4)) {
for (int x = 0; x < i->width; x++)
for (int y = 0; y < i->height; y++) {
image_set(i, x, y, f(image_get(i, x, y)));
}
}
/**Capture an image, standardize it, and write it to a file*/
void image_save(char* filename){
struct fp_img* img = image_get();
fp_img_standardize(img);
image_writefile(img, filename);
fp_img_free(img); //free it
}
