Custom thubmanil image type (extension)

inc/config.php

@@ -153,6 +153,12 @@
 	$config['thumb_width']	= 255;
 	$config['thumb_height']	= 255;
 	
+	// Thumbnail extension, empty for inherited (png recommended)
+	$config['thumb_ext'] = '';
+	
+	// Thumbnail quality (compression level), from 0 to 9
+	$config['thumb_quality'] = 7;
+	
 	// When a thumbnailed image is going to be the same (in dimension), just copy the entire file and use that as a thumbnail instead of resizing/redrawing
 	$config['minimum_copy_resize'] = true;
 	
@@ -205,8 +211,8 @@
 	// These can be URLs OR base64 (data URI scheme)
 	//$config['image_sticky']		= $config['dir']['static'] . 'sticky.gif';
 	//$config['image_locked']		= $config['dir']['static'] . 'locked.gif';
-	//$config['image_deleted']	= $config['dir']['static'] . 'deleted.png';
+	//$config['image_deleted']	= $config['dir']['static'] . 'deleted.';
-	//$config['image_zip']		= $config['dir']['static'] . 'zip.png';
+	//$config['image_zip']		= $config['dir']['static'] . 'zip.';
 	
 	
 	// If you want to put images and other dynamic-static stuff on another (preferably cookieless) domain, you can use this:
@@ -511,7 +517,7 @@
 	$config['ie_mime_type_detection'] = '/<(?:body|head|html|img|plaintext|pre|script|table|title|a href|channel|scriptlet)/';
 	
 	// Allowed file extensions
-	$config['allowed_ext'] = Array('jpg', 'jpeg', 'bmp', 'gif', 'png');
+	$config['allowed_ext'] = Array('jpg', 'jpeg', 'bmp', 'gif', '');
 	
 	// The names on the post buttons. (On most imageboards, these are both "Post".)
 	$config['button_newtopic']	= 'New Topic';

inc/functions.php

@@ -1361,7 +1361,7 @@
 		return $image;
 	}
 
-	function resize($src, $width, $height, $destination_pic, $max_width, $max_height) {
+	function resize($src, $width, $height, $destination_pic, $max_width, $max_height, $ext) {	
 		$return = Array();
 
 		$x_ratio = $max_width / $width;
@@ -1382,13 +1382,34 @@
 		$return['height'] = $tn_height;
 
 		$tmp = imagecreatetruecolor($tn_width, $tn_height);
-		imagecolortransparent($tmp, imagecolorallocatealpha($tmp, 0, 0, 0, 0));
+		
-		imagealphablending($tmp, false);
+		if($ext == 'png' || $ext == 'gif') {
-		imagesavealpha($tmp, true);
+			imagecolortransparent($tmp, imagecolorallocatealpha($tmp, 0, 0, 0, 0));
-
+			imagesavealpha($tmp, true);
+		}
+		if($ext == 'png')
+			imagealphablending($tmp, false);
+		
 		imagecopyresampled($tmp, $src, 0, 0, 0, 0, $tn_width, $tn_height, $width, $height);
-
+		
-		imagepng($tmp, $destination_pic, 4);
+		switch($ext) {
+			case 'jpg':
+			case 'jpeg':
+				imagejpeg($tmp, $destination_pic);
+				break;
+			case 'png':
+				imagepng($tmp, $destination_pic, $config['thumb_quality']);
+				break;
+			case 'gif':
+				imagegif($tmp, $destination_pic);
+				break;
+			case 'bmp':
+				imagebmp($tmp, $destination_pic);
+				break;
+			default:
+				error('Unknwon file extension.');
+		}
+		
 		imagedestroy($src);
 		imagedestroy($tmp);
 

post.php

@@ -280,7 +280,7 @@
 			$post['extension'] = strtolower(substr($post['filename'], strrpos($post['filename'], '.') + 1));
 			$post['file_id'] = time() . rand(100, 999);
 			$post['file'] = $board['dir'] . $config['dir']['img'] . $post['file_id'] . '.' . $post['extension'];
-			$post['thumb'] = $board['dir'] . $config['dir']['thumb'] . $post['file_id'] . '.png';
+			$post['thumb'] = $board['dir'] . $config['dir']['thumb'] . $post['file_id'] . '.' . ($config['thumb_ext'] ? $config['thumb_ext'] : $post['extension']);
 		}
 		
 		// Check string lengths
@@ -414,9 +414,7 @@
 			$post['filehash'] = $config['file_hash']($post['file']);
 			$post['filesize'] = filesize($post['file']);
 			
-			
+			if($config['minimum_copy_resize'] && $post['width'] <= $config['thumb_width'] && $post['height'] <= $config['thumb_height'] && $post['extension'] == ($config['thumb_ext'] ? $config['thumb_ext'] : $post['extension'])) {
-			
-			if($config['minimum_copy_resize'] && $post['width'] <= $config['thumb_width'] && $post['height'] <= $config['thumb_height']) {
 				// Copy, because there's nothing to resize
 				copy($post['file'], $post['thumb']);
 				
@@ -426,7 +424,7 @@
 				$image = createimage($post['extension'], $post['file']);
 				
 				// Create a thumbnail
-				$thumb = resize($image, $post['width'], $post['height'], $post['thumb'], $config['thumb_width'], $config['thumb_height']);
+				$thumb = resize($image, $post['width'], $post['height'], $post['thumb'], $config['thumb_width'], $config['thumb_height'], ($config['thumb_ext'] ? $config['thumb_ext'] : $post['extension']));
 				
 				$post['thumbwidth'] = $thumb['width'];
 				$post['thumbheight'] = $thumb['height'];