From fd50fdd9e3523f75d8d442160b1a955ccf972bde Mon Sep 17 00:00:00 2001
From: haneul <syhan@cs.washington.edu>
Date: Wed, 28 Oct 2009 06:46:44 +0000
Subject: [PATCH] #18400897 : check gd functions existence before using them

git-svn-id: http://xe-core.googlecode.com/svn/sandbox@6898 201d5d3c-b55e-5fd7-737f-ddc643e51545
---
 classes/file/FileHandler.class.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/classes/file/FileHandler.class.php b/classes/file/FileHandler.class.php
index da3808613..4f518b57c 100644
--- a/classes/file/FileHandler.class.php
+++ b/classes/file/FileHandler.class.php
@@ -470,20 +470,24 @@
             // create temporary image having original type
             switch($type) {
                 case 'gif' :
+                        if(!function_exists('imagecreatefromgif')) return false;
                         $source = @imagecreatefromgif($source_file);
                     break;
                 // jpg
                 case 'jpeg' :
                 case 'jpg' :
+                        if(!function_exists('imagecreatefromjpeg')) return false;
                         $source = @imagecreatefromjpeg($source_file);
                     break;
                 // png
                 case 'png' :
+                        if(!function_exists('imagecreatefrompng')) return false;
                         $source = @imagecreatefrompng($source_file);
                     break;
                 // bmp
                 case 'wbmp' :
                 case 'bmp' :
+                        if(!function_exists('imagecreatefromwbmp')) return false;
                         $source = @imagecreatefromwbmp($source_file);
                     break;
                 default :
@@ -514,17 +518,21 @@
             // write into the file
             switch($target_type) {
                 case 'gif' :
+                        if(!function_exists('imagegif')) return false;
                         $output = @imagegif($thumb, $target_file);
                     break;
                 case 'jpeg' :
                 case 'jpg' :
+                        if(!function_exists('imagejpeg')) return false;
                         $output = @imagejpeg($thumb, $target_file, 100);
                     break;
                 case 'png' :
+                        if(!function_exists('imagepng')) return false;
                         $output = @imagepng($thumb, $target_file, 9);
                     break;
                 case 'wbmp' :
                 case 'bmp' :
+                        if(!function_exists('imagewbmp')) return false;
                         $output = @imagewbmp($thumb, $target_file, 100);
                     break;
             }