add gdimage output

qrconfig.php

@@ -14,4 +14,4 @@
     define('QR_DEFAULT_MASK', 2);                                                               // when QR_FIND_BEST_MASK === false
 
     define('QR_PNG_MAXIMUM_SIZE',  1024);                                                       // maximum allowed png image width (in pixels), tune to make sure GD and PHP can handle such big images
-                                                  
+    define('QR_GDIMAGE_MAXIMUM_SIZE',  1024);

qrencode.php

@@ -286,6 +286,13 @@ public static function png($text, $outfile = false, $level = QR_ECLEVEL_L, $size
             return $enc->encodePNG($text, $outfile, $saveandprint=false);
         }
 
+        //----------------------------------------------------------------------
+        public static function gdimage($text, $level = QR_ECLEVEL_L, $size = 3, $margin = 4) 
+        {
+            $enc = QRencode::factory($level, $size, $margin);
+            return $enc->encodeGDIMAGE($text);
+        }
+
         //----------------------------------------------------------------------
         public static function text($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4) 
         {
@@ -566,4 +573,12 @@ public function encodeSVG($intext, $outfile = false,$saveandprint=false)
 
             }
         }
+
+        //----------------------------------------------------------------------
+        public function encodeGDIMAGE($intext) 
+        {
+          $tab = $this->encode($intext);
+          $maxSize = (int)(QR_GDIMAGE_MAXIMUM_SIZE / (count($tab)+2*$this->margin));
+          return QRimage::gdimage($tab, min(max(1, $this->size), $maxSize), $this->margin);
+        }
     }

qrimage.php

@@ -47,6 +47,12 @@ public static function png($frame, $filename = false, $pixelPerPoint = 4, $outer
             ImageDestroy($image);
         }
 
+        //----------------------------------------------------------------------
+        public static function gdimage($frame, $pixelPerPoint = 4, $outerFrame = 4) 
+        {
+            return self::image($frame, $pixelPerPoint, $outerFrame);
+        }
+
         //----------------------------------------------------------------------
         public static function jpg($frame, $filename = false, $pixelPerPoint = 8, $outerFrame = 4, $q = 85)
         {