PHP Hook to disable functionality?

While we don’t have a filter for that, you can add ‘noresize’ into the filename of any image and Imsanity will ignore it.

If Imsanity was called from something like this would it work using the current_user_can hook?

/**
 * Filter the upload size limit for non-administrators.
 *
 * @param string $size Upload size limit (in bytes).
 * @return int (maybe) Filtered size limit.
 */
function filter_site_upload_size_limit( $size ) {
    // Set the upload size limit to 10 MB for users lacking the 'manage_options' capability.
    if ( ! current_user_can( 'manage_options' ) ) {
        // 10 MB.
        $size = 1024 * 10000;
    }
    return $size;
}
add_filter( 'upload_size_limit', 'filter_site_upload_size_limit', 20 );

Credit: Function contributed by Drew Jaynes — 6 years ago