$watermark_changed = $watermark->file != $old_watermark->file || $watermark->xpos != $old_watermark->xpos || $watermark->ypos != $old_watermark->ypos || $watermark->xrepeat != $old_watermark->xrepeat || $watermark->yrepeat != $old_watermark->yrepeat || $watermark->opacity != $old_watermark->opacity;
// save the new watermark configuration
ImageStdParams::set_watermark($watermark);
// do we have to regenerate the derivatives (and which types)?
$changed_types = array();
foreach (ImageStdParams::get_defined_type_map() as $type => $params) {
$old_use_watermark = $params->use_watermark;
ImageStdParams::apply_global($params);
$changed = $params->use_watermark != $old_use_watermark;
if (!$changed and $params->use_watermark) {
$changed = $watermark_changed;
}
if (!$changed and $params->use_watermark) {
// if thresholds change and before/after the threshold is lower than the corresponding derivative side -> some derivatives might switch the watermark
$changed |= $watermark->min_size[0] != $old_watermark->min_size[0] and ($watermark->min_size[0] < $params->max_width() or $old_watermark->min_size[0] < $params->max_width());
$changed |= $watermark->min_size[1] != $old_watermark->min_size[1] and ($watermark->min_size[1] < $params->max_height() or $old_watermark->min_size[1] < $params->max_height());
}
if ($changed) {
$params->last_mod_time = time();
$changed_types[] = $type;
}
}
ImageStdParams::save();
if (count($changed_types)) {
clear_derivative_cache($changed_types);
}
$page['infos'][] = l10n('Your configuration settings are saved');
} else {
$template->assign('watermark', $pwatermark);
$template->assign('ferrors', $errors);
}