Changeset 2652

Timestamp:

05/07/2008 09:24:19 AM (7 months ago)

Author:

OscarB

Message:

Changes to use standard font in system/fonts.
Add new 'alphasoup' captcha style based on Pulstar's forum post.

Location:

trunk/system

Files:

• config/captcha.php (modified) (3 diffs)
• libraries/Captcha.php (modified) (1 diff)

trunk/system/config/captcha.php

@@ -12 +12 @@
  */
 $config['width']  = 150;
-$config['height'] = 40;
+$config['height'] = 50;
 
 /**
@@ -19 +19 @@
  * 'standard' is the recommended style. A font must be supplied. A background
  * image is optional.
+ * 'alphasoup' is an alternative style. A font must be supplied.
  * 'math' is a 'solve the question' style.
  * A font must be supplied. A background image is optional.
  * Custom styles can be added easily by extending the library.
  */
-$config['style'] = 'basic';
+$config['style'] = 'standard';
 
 /**
@@ -35 +36 @@
  * If using 'standard' style, you must supply a valid truetype font file.
  */
-$config['font_path'] = '';
+$config['font_path'] = SYSPATH.'fonts/';
 
 /**
  * Name of the font, with the file extension. Case sensitive.
  */
-$config['font_name'] = '';
+$config['font_name'] = 'DejaVuSerif.ttf';
 
 /**

trunk/system/libraries/Captcha.php

@@ -235 +235 @@
 
         /**
+         * Draws the alphasoup Captcha image:
+         * Requires GD with freetype and available truetype compatible font files.
+         *
+         * @param   none
+         * @return  void
+         */
+        protected function alphasoup_captcha()
+        {
+                $this->img_create();
+                $font = $this->font_path.$this->font_name;
+                $text_color = imagecolorallocate($this->image, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
+                $color_limit = mt_rand(96, 160);
+                $fill_color = imageColorAllocate($this->image, mt_rand($color_limit, 255), mt_rand($color_limit, 255), mt_rand($color_limit, 255));
+                imageFilledRectangle($this->image, 0, 0, $this->width, $this->height, $fill_color);
+                $font_width = imageFontWidth(10);
+                $chars = 'ABCDEFGHIJKLMNO';
+
+                for($loop = 0; $loop < 20; $loop++)
+                {
+                        $text_color = imageColorAllocate($this->image, mt_rand($color_limit + 8, 255), mt_rand($color_limit + 8, 255), mt_rand($color_limit + 8, 255));
+                        $char = substr($chars, mt_rand(0,15), 1);
+                        imageTTFtext($this->image, mt_rand(23, 27), mt_rand(160, 200), mt_rand(-10, $this->width+10), mt_rand(-10, 60), $text_color, $font, $char);
+                }
+
+                $this->calculate_spacing();
+                // Draw each Captcha character with varying attributes
+                for ($i = 0, $strlen = strlen($this->captcha_code); $i < $strlen; $i++)
+                {
+                        // Allocate random color, size and rotation attributes to text
+                        $text_color = imagecolorallocate($this->image, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0, 100));
+                        $angle = mt_rand(-40, 40);
+
+                        // Make first char angle inward
+                        if ($i === 0)
+                        {
+                                $angle = -abs($angle);
+                        }
+                        // Make last char angle inward
+                        if ($i === ($this->num_chars - 1))
+                        {
+                                $angle = abs($angle);
+                        }
+
+                        // Scale the character size on image height
+                        $font_size = mt_rand($this->height - 20, $this->height - 12);
+                        $char_details = imageftbbox($font_size, $angle, $font, $this->captcha_code[$i], array());
+
+                        // Calculate character starting coordinates
+                        $iX = $this->spacing / 4 + $i * $this->spacing;
+                        $char_height = $char_details[2] - $char_details[5];
+                        $iY = $this->height / 2 + $char_height / 4;
+
+                        // Write text character to image
+                        imagefttext($this->image, $font_size, $angle, $iX, $iY, $text_color, $font, $this->captcha_code[$i], array());
+                }
+
+        }
+
+        /**
          * Draws the math riddle Captcha image.
          * Requires GD with freetype and available truetype compatible font files.