thumbnail generator for epubs

Zotlabs/Thumbs/Epubthumb.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Zotlabs\Thumbs;
+
+require_once('library/epub-meta/epub.php');
+
+class Epubthumb {
+
+	function Match($type) {
+		return(($type === 'application/epub+zip') ? true : false );
+	}
+
+	function Thumb($attach,$preview_style,$height = 300, $width = 300) {
+
+		$photo = false;
+
+		$ep = new \Epub(dbunescbin($attach['content']));
+		$data = $ep->Cover();
+
+		if($data['found']) {
+			$photo = $data['data'];
+		}
+
+        if($photo) {
+			$image = imagecreatefromstring($photo);
+			$dest = imagecreatetruecolor( $width, $height );
+	        $srcwidth = imagesx($image);
+    	    $srcheight = imagesy($image);
+
+        	imagealphablending($dest, false);
+			imagesavealpha($dest, true);
+        	imagecopyresampled($dest, $image, 0, 0, 0, 0, $width, $height, $srcwidth, $srcheight);
+            imagedestroy($image);
+			imagejpeg($dest,dbunescbin($attach['content']) . '.thumb');
+		}
+	}
+}
+