Refactor canvas rendering and DPI handling for improved quality and performance

core/config/main.php

@@ -94,5 +94,5 @@
     $g_config['vote']                   = "./tmp/vote/vote.txt";
     $g_config['voteTopics']             = "./tmp/vote/voteTopics.txt_";
     $g_config['use_js_cache']           = true;
-    $g_config['engine_version']         = 104;
+    $g_config['engine_version']         = 105;
 ?>