initial commit

app/Controller/Component/CaptchaComponent.php

@@ -0,0 +1,170 @@
+<?php
+/*
+CaptchaComponent
+*/
+App::uses('Component', 'Controller');
+
+class CaptchaComponent extends Component{
+	
+	public $settings = array(
+		'characters' => null,
+		'winHeight' => 50,
+		'winWidth' => 320,
+		'fontSize' => 25,
+		'fontPath' => 'tahomabd.ttf',
+		'bgNoise' => false,
+		'lineNoise' => false,
+		'bgColor' => '#F58220',
+		'noiseColor' => '#000',
+		'textColor' => '#fff',
+		'noiseLevel' => '45'
+		
+	);
+
+
+////////////////////////////////////////////////////////////////////////////////
+	
+	
+	function __construct($collection, $settings){		
+		$this->Controller = $collection->getController();		
+	}
+
+////////////////////////////////////////////////////////////////////////////////
+	public function ShowImage($custom = array())
+	{
+		$new_settings = array_merge($this->settings, $custom);			
+		
+		$this->settings = $new_settings;
+		$this -> win();		
+	}
+
+////////////////////////////////////////////////////////////////////////////////
+	private function win()
+	{
+		//background image
+		$image = imagecreatetruecolor($this->settings['winWidth'], $this->settings['winHeight']) 
+        	or die("<b>" . __FILE__ . "</b><br />" . __LINE__ . " : 
+            	" ."Cannot Initialize new GD image stream");
+				
+		$bgColor = $this->hex2rgb($this->settings['bgColor']);
+		$noiseColor = $this->hex2rgb($this->settings['noiseColor']);
+		$textColor = $this->hex2rgb($this->settings['textColor']);
+		
+		$bg = imagecolorallocate($image, $bgColor[0], $bgColor[1], $bgColor[2]);
+		imagefill($image, 10, 10, $bg);
+		
+		for ($x=0; $x < $this->settings['noiseLevel']; $x++)
+		{
+			for ($y=0; $y < $this->settings['noiseLevel']; $y++)
+			{
+				$temp_color = imagecolorallocate($image,$noiseColor[0],$noiseColor[1],$noiseColor[2]);
+				imagesetpixel( $image, rand(0,$this->settings['winWidth']), rand(0,$this->settings['winHeight']) , $temp_color );
+			}
+		}
+		
+		$char_color = imagecolorallocatealpha($image, $textColor[0], $textColor[1], $textColor[2], 0);
+
+		//Font
+		$font = $this->settings['fontPath'];
+		
+		$font_size = $this->settings['fontSize'];
+		////////////////////////////////////
+		//Image characters
+
+		$char = "";
+		if ( empty($this->settings['characters']) )
+		{
+			$this->settings['characters'] = mt_rand(100,10000);
+		}
+		$r_x1 = 10; $r_x2 = 20; 
+		$r_y1 = $this->settings['winHeight']/1.8; $r_y2 = $r_y1+10; 
+		
+		
+		$this->settings['characters'] = (string)$this->settings['characters'];
+		
+		for($i = 0; $i < strlen($this->settings['characters']); $i++ )
+		{
+			$char = $this->settings['characters'][$i];
+			$random_x = mt_rand($r_x1 , $r_x2);
+			$random_y = mt_rand($r_y1 , $r_y2);
+			$random_angle = mt_rand(-20 , 20);
+			imagettftext($image, $font_size, $random_angle, 
+	        	$random_x, $random_y, $char_color, $font, $char);				
+				
+			$r_x1+=40; $r_x2+=40;	
+		}
+		
+
+		////////////////////////////////////
+		if ($this -> settings['bgNoise'])
+			$image = $this -> apply_wave($image, $this->settings['winWidth'], 
+            	$this->settings['winHeight']);
+			
+		////////////////////////////////////
+		//lines
+		if ($this -> settings['lineNoise'])
+		{
+			for ($i=0; $i<$this->settings['winWidth']; $i++ )
+			{
+				if ($i%10 == 0)
+				{
+					imageline ( $image, $i, 0, 
+                    	$i+10, 50, $char_color );
+					imageline ( $image, $i, 0, 
+                    	$i-10, 50, $char_color );
+				}
+			}
+		}
+			
+		////////////////////////////////////
+		return imagepng($image);
+		imagedestroy($image);
+	}
+
+
+///////////////////////////////////////////////////////////
+	private function apply_wave($image, $width, $height)
+	{		
+		$x_period = 10;
+		$y_period = 10;
+		$y_amplitude = 5;
+		$x_amplitude = 5;
+		
+		$xp = $x_period*rand(1,3);
+		$k = rand(0,100);
+		for ($a = 0; $a<$width; $a++)
+			imagecopy($image, $image, $a-1, sin($k+$a/$xp)*$x_amplitude, 
+            	$a, 0, 1, $height);
+			
+		$yp = $y_period*rand(1,2);
+		$k = rand(0,100);
+		for ($a = 0; $a<$height; $a++)
+			imagecopy($image, $image, sin($k+$a/$yp)*$y_amplitude, 
+            	$a-1, 0, $a, $width, 1);
+		
+		return $image;
+	}
+	
+	
+	private function hex2rgb($hex) {
+	   $hex = str_replace("#", "", $hex);
+	
+	   if(strlen($hex) == 3) {
+	      $r = hexdec(substr($hex,0,1).substr($hex,0,1));
+	      $g = hexdec(substr($hex,1,1).substr($hex,1,1));
+	      $b = hexdec(substr($hex,2,1).substr($hex,2,1));
+	   } else {
+	      $r = hexdec(substr($hex,0,2));
+	      $g = hexdec(substr($hex,2,2));
+	      $b = hexdec(substr($hex,4,2));
+	   }
+	   $rgb = array($r, $g, $b);
+	   //return implode(",", $rgb); // returns the rgb values separated by commas
+	   return $rgb; // returns an array with the rgb values
+	}
+	
+	
+}
+
+
+