function watermark(WOOF_Image $watermark, $attr = array()) {
// setup default offsets, based on specified
global $wf;
$ic = $wf->get_image_class();
$r = wp_parse_args( $attr, array(
"at" => "se",
"inset" => 10,
"alpha" => true,
"q" => 90
));
$w = "";
$h = "";
if (isset($r["w"])) {
$r["width"] = $r["w"];
}
if (isset($r["h"])) {
$r["height"] = $r["h"];
}
if (isset($r["height"])) {
$h = $r["height"];
}
if (isset($r["width"])) {
$w = $r["width"];
}
if (isset($r["size"])) {
$w = $r["size"];
}
if (isset($h)) {
if (preg_match("/(\d+)%/", $h, $m)) {
$h = round(($m[1] / 100) * $this->height());
}
}
if (isset($w)) {
if (preg_match("/(\d+)%/", $w, $m)) {
$w = round(($m[1] / 100) * $this->width());
}
}
$os = "";
if (isset($r["offset"])) {
$os = $r["offset"];
}
$r["suffix"] = ".mark.".md5($watermark->filepath()).".".$r["at"].$r["inset"].$os.$w.$h;
$ci = $this->cacheinfo($r);
if (file_exists($ci["path"]) && !isset($r["nocache"])) {
return new $ic( $ci["path"], $ci["url"], $this->attr() );
} else {
// work out the offsets
if (isset($r["offset"])) {
$offset = self::parse_coord($r["offset"]);
} else {
$offset = self::get_offset($r["inset"], $r["at"]);
}
$image = WOOF_Image::load($this->filepath());
if (isset($w) && isset($h)) {
$watermark = $watermark->resize("w=$w&h=$h&q=".$r["q"]);
} else if (isset($w)) {
$watermark = $watermark->resize("w=$w&q=".$r["q"]);
} else if (isset($h)) {
$watermark = $watermark->resize("h=$h&q=".$r["q"]);
}
$wimage = WOOF_Image::load($watermark->filepath());
$sw = $watermark->width();
$sh = $watermark->height();
$dw = $this->width();
$dh = $this->height();
// work out the position
$coord = self::get_at_coord( $dw, $dh, $sw, $sh, $r["at"] );
// get final coord
$fc = array( $coord[0] + $offset[0], $coord[1] + $offset[1] );
// Set the margins for the stamp and get the height/width of the stamp image
$marge_right = 10;
$marge_bottom = 10;
// Merge the stamp onto our photo with an opacity (transparency) of 50%
self::imagecopymerge_alpha($image, $wimage, $fc[0], $fc[1], 0, 0, $sw, $sh, 100);
if ( self::save_image( $ci["path"], $image, $this->infer_content_type($r), $attr ) ) {
return new $ic( $ci["path"], $ci["url"], $this->attr() );
}
}
}
