Add ImageMagic support to thumbnail process

README.md

@@ -48,6 +48,10 @@ Installing
       - Set ``TINYIB_REQMOD`` to ``all`` to require moderation for all posts.
       - Moderate posts by visiting the management panel.
     - When setting ``TINYIB_DBMODE`` to ``pdo``, note that PDO mode has been tested on **MySQL databases only**.  Theoretically it will work with any applicable driver, but this is not guaranteed.  If you use an alternative driver, please report back regarding how it works.
+    - To use ImageMagick instead of GD when creating thumbnails:
+      - Install ImageMagick and ensure that the ``convert`` command is available.
+      - Set ``TINYIB_THUMBNAIL`` to ``imagemagick``.
+      - **Note:** GIF files will have animated thumbnails, which will often have large file sizes.
  6. [CHMOD](http://en.wikipedia.org/wiki/Chmod) write permissions to these directories:
     - ./ (the directory containing TinyIB)
     - ./src/

inc/defines.php

@@ -27,6 +27,9 @@ if (!defined('TINYIB_SWF')) {
 if (!defined('TINYIB_WEBM')) {
 	define('TINYIB_WEBM', false);
 }
+if (!defined('TINYIB_THUMBNAIL')) {
+	define('TINYIB_THUMBNAIL', 'gd');
+}
 if (!defined('TINYIB_NOFILEOK')) {
 	define('TINYIB_NOFILEOK', false);
 }

inc/functions.php

@@ -361,15 +361,16 @@ function thumbnailDimensions($post) {
 	return ($post['image_width'] > $max_width || $post['image_height'] > $max_height) ? array($max_width, $max_height) : array($post['image_width'], $post['image_height']);
 }
 
-function createThumbnail($name, $filename, $new_w, $new_h) {
+function createThumbnail($file_location, $thumb_location, $new_w, $new_h) {
-	$system = explode(".", $filename);
+	if (TINYIB_THUMBNAIL == 'gd') {
+		$system = explode(".", $thumb_location);
 		$system = array_reverse($system);
 		if (preg_match("/jpg|jpeg/", $system[0])) {
-		$src_img = imagecreatefromjpeg($name);
+			$src_img = imagecreatefromjpeg($file_location);
 		} else if (preg_match("/png/", $system[0])) {
-		$src_img = imagecreatefrompng($name);
+			$src_img = imagecreatefrompng($file_location);
 		} else if (preg_match("/gif/", $system[0])) {
-		$src_img = imagecreatefromgif($name);
+			$src_img = imagecreatefromgif($file_location);
 		} else {
 			return false;
 		}
@@ -377,6 +378,7 @@ function createThumbnail($name, $filename, $new_w, $new_h) {
 		if (!$src_img) {
 			fancyDie("Unable to read uploaded file during thumbnailing. A common cause for this is an incorrect extension when the file is actually of a different type.");
 		}
+
 		$old_x = imageSX($src_img);
 		$old_y = imageSY($src_img);
 		$percent = ($old_x > $old_y) ? ($new_w / $old_x) : ($new_h / $old_y);
@@ -384,7 +386,7 @@ function createThumbnail($name, $filename, $new_w, $new_h) {
 		$thumb_h = round($old_y * $percent);
 
 		$dst_img = imagecreatetruecolor($thumb_w, $thumb_h);
-	if (preg_match("/png/", $system[0]) && imagepng($src_img, $filename)) {
+		if (preg_match("/png/", $system[0]) && imagepng($src_img, $thumb_location)) {
 			imagealphablending($dst_img, false);
 			imagesavealpha($dst_img, true);
 
@@ -398,21 +400,30 @@ function createThumbnail($name, $filename, $new_w, $new_h) {
 		}
 
 		if (preg_match("/png/", $system[0])) {
-		if (!imagepng($dst_img, $filename)) {
+			if (!imagepng($dst_img, $thumb_location)) {
 				return false;
 			}
 		} else if (preg_match("/jpg|jpeg/", $system[0])) {
-		if (!imagejpeg($dst_img, $filename, 70)) {
+			if (!imagejpeg($dst_img, $thumb_location, 70)) {
 				return false;
 			}
 		} else if (preg_match("/gif/", $system[0])) {
-		if (!imagegif($dst_img, $filename)) {
+			if (!imagegif($dst_img, $thumb_location)) {
 				return false;
 			}
 		}
 
 		imagedestroy($dst_img);
 		imagedestroy($src_img);
+	} else { // imagemagick
+		$discard = '';
+		$exit_status = 1;
+		exec("convert $file_location -auto-orient -thumbnail '" . $new_w . "x" . $new_h . "' -coalesce -layers OptimizeFrame -depth 4 -type palettealpha $thumb_location", $discard, $exit_status);
+
+		if ($exit_status != 0) {
+			return false;
+		}
+	}
 
 	return true;
 }

settings.default.php

@@ -37,6 +37,7 @@ define('TINYIB_WEBM', false);         // Enable .weba and .webm audio/video file
 // File control
 define('TINYIB_MAXKB', 2048);         // Maximum file size in kilobytes  [0 to disable]
 define('TINYIB_MAXKBDESC', "2 MB");   // Human-readable representation of the maximum file size
+define('TINYIB_THUMBNAIL', 'gd');     // Thumbnail method to use: gd / imagemagick  (see README for instructions)
 define('TINYIB_NOFILEOK', false);     // Allow the creation of new threads without uploading a file
 
 // Thumbnail size - new thread