The CAPTCHA type now works

Generator/CaptchaGenerator.php

@@ -0,0 +1,127 @@
+<?php
+
+namespace Gregwar\CaptchaBundle\Generator;
+
+/**
+ * Generates a CAPTCHA image
+ */
+class CaptchaGenerator {
+
+    public $value;
+
+    public function __construct($value)
+    {
+        $this->value = $value;
+    }
+
+    public function getCode()
+    {
+        return 'data:image/jpeg;base64,'.base64_encode($this->generate());
+    }
+
+    public function generate()
+    {
+        $i = imagecreatetruecolor(120,40);
+        $col = imagecolorallocate($i, mt_rand(0,110), mt_rand(0,110), mt_rand(0,110));
+
+        imagefill($i, 0, 0, 0xFFFFFF);
+
+        // Draw random lines
+        for ($t=0; $t<10; $t++) {
+            $tcol = imagecolorallocate($i, 100+mt_rand(0,150), 100+mt_rand(0,150), 100+mt_rand(0,150));
+            $Xa = mt_rand(0, 120);
+            $Ya = mt_rand(0, 40);
+            $Xb = mt_rand(0, 120);
+            $Yb = mt_rand(0, 40);
+            imageline($i, $Xa, $Ya, $Xb, $Yb, $tcol);
+        }
+
+        // Write CAPTCHA text
+        imagettftext($i, 28, 0, 5, 32, $col, dirname(__FILE__).'/Font/captcha.ttf', $this->value);
+
+        // Distort the image
+        $X = mt_rand(0, 120);
+        $Y = mt_rand(0, 40);
+        $Phase=mt_rand(0,10);
+        $Scale = 1.3 + mt_rand(0,10000)/30000;
+        $Amp=1+mt_rand(0,1000)/1000;
+        $out = imagecreatetruecolor(120,40);
+
+        for ($x=0; $x<120; $x++)
+            for ($y=0; $y<40; $y++) {
+                $Vx=$x-$X;
+                $Vy=$y-$Y;
+                $Vn=sqrt($Vx*$Vx+$Vy*$Vy);
+
+                if ($Vn!=0) {
+                    $Vn2=$Vn+4*sin($Vn/8);
+                    $nX=$X+($Vx*$Vn2/$Vn);
+                    $nY=$Y+($Vy*$Vn2/$Vn);
+                } else {
+                    $nX=$X;
+                    $nY=$Y;
+                }
+                $nY = $nY+$Scale*sin($Phase + $nX*0.2);
+
+                $p = $this->bilinearInterpolate($nX-floor($nX), $nY-floor($nY), 
+                    $this->getCol($i,floor($nX),floor($nY)),
+                    $this->getCol($i,ceil($nX),floor($nY)),
+                    $this->getCol($i,floor($nX),ceil($nY)),
+                    $this->getCol($i,ceil($nX),ceil($nY)));
+
+                if ($p==0) {
+                    $p=0xFFFFFF;
+                }
+
+                imagesetpixel($out, $x, $y, $p);
+            }
+
+        // Renders it
+        ob_start();
+        imagejpeg($out, null, 15);
+        return ob_get_clean();
+    }
+
+    function getCol($image, $x, $y)
+    {
+        $L = imagesx($image);
+        $H = imagesy($image);
+        if ($x<0 || $x>=$L || $y<0 || $y>=$H)
+            return 0xFFFFFF;
+        else return imagecolorat($image, $x, $y);
+    }
+
+    function getRGB($col) {
+        return array(
+            (int)($col >> 16) & 0xff,
+            (int)($col >> 8) & 0xff,
+            (int)($col) & 0xff,
+        );
+    }
+
+    function bilinearInterpolate($x, $y, $nw, $ne, $sw, $se)
+    {
+        list($r0, $g0, $b0) = $this->getRGB($nw);
+        list($r1, $g1, $b1) = $this->getRGB($ne);
+        list($r2, $g2, $b2) = $this->getRGB($sw);
+        list($r3, $g3, $b3) = $this->getRGB($se);
+
+        $cx = 1.0 - $x;
+        $cy = 1.0 - $y;
+
+        $m0 = $cx * $r0 + $x * $r1;
+        $m1 = $cx * $r2 + $x * $r3;
+        $r = (int)($cy * $m0 + $y * $m1);
+
+        $m0 = $cx * $g0 + $x * $g1;
+        $m1 = $cx * $g2 + $x * $g3;
+        $g = (int)($cy * $m0 + $y * $m1);
+
+        $m0 = $cx * $b0 + $x * $b1;
+        $m1 = $cx * $b2 + $x * $b3;
+        $b = (int)($cy * $m0 + $y * $m1);
+
+        return ($r << 16) | ($g << 8) | $b;
+    }
+}
+

Resources/views/captcha.html.twig

@@ -1,4 +1,4 @@
 {% block captcha_widget %}
-    [{{ captcha_code }}]<br />
+    <img src="{{ captcha_code }}" /><br />
     {{ form_widget(form) }}
 {% endblock %}

Type/CaptchaType.php

@@ -11,6 +11,7 @@ use Symfony\Component\Form\Exception\FormException;
 use Symfony\Component\HttpFoundation\Session;
 
 use Gregwar\CaptchaBundle\Validator\CaptchaValidator;
+use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
 
 /**
  * Captcha type
@@ -37,7 +38,9 @@ class CaptchaType extends AbstractType
 
     public function buildView(FormView $view, FormInterface $form)
     {
-        $view->set('captcha_code', $this->generateCaptchaValue());
+        $generator = new CaptchaGenerator($this->generateCaptchaValue());
+
+        $view->set('captcha_code', $generator->getCode());
     }    
 
     public function getParent(array $options)