--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/forum/Sources/Subs-Graphics.php	Sun Jul 07 11:25:48 2013 +0200
@@ -0,0 +1,1045 @@
+<?php
+
+/**
+ * Simple Machines Forum (SMF)
+ *
+ * @package SMF
+ * @author Simple Machines http://www.simplemachines.org
+ * @copyright 2011 Simple Machines
+ * @license http://www.simplemachines.org/about/smf/license.php BSD
+ *
+ * @version 2.0
+ */
+
+// TrueType fonts supplied by www.LarabieFonts.com
+
+if (!defined('SMF'))
+	die('Hacking attempt...');
+
+/*	This whole file deals almost exclusively with handling avatars,
+	specifically uploaded ones.  It uses, for gifs at least, Gif Util... for
+	more information on that, please see its website, shown above.  The other
+	functions are as follows:
+
+	bool downloadAvatar(string url, int id_member, int max_width,
+			int max_height)
+		- downloads file from url and stores it locally for avatar use
+		  by id_member.
+		- supports GIF, JPG, PNG, BMP and WBMP formats.
+		- detects if GD2 is available.
+		- if GIF support isn't present in GD, handles GIFs with gif_loadFile()
+		  and gif_outputAsPng().
+		- uses resizeImageFile() to resize to max_width by max_height,
+		  and saves the result to a file.
+		- updates the database info for the member's avatar.
+		- returns whether the download and resize was successful.
+
+	bool createThumbnail(string source, int max_width, int max_height)
+		- create a thumbnail of the given source.
+		- uses the resizeImageFile function to achieve the resize.
+		- returns whether the thumbnail creation was successful.
+
+	bool reencodeImage(string fileName, int preferred_format = 0)
+		- creates a copy of the file at the same location as fileName.
+		- the file would have the format preferred_format if possible,
+		  otherwise the default format is jpeg.
+		- makes sure that all non-essential image contents are disposed.
+		- returns true on success, false on failure.
+
+	bool checkImageContents(string fileName, bool extensiveCheck = false)
+		- searches through the file to see if there's non-binary content.
+		- if extensiveCheck is true, searches for asp/php short tags as well.
+		- returns true on success, false on failure.
+
+	bool checkGD()
+		- sets a global $gd2 variable needed by some functions to determine
+		  whetehr the GD2 library is present.
+		- returns whether or not GD1 is available.
+
+	void resizeImageFile(string source, string destination,
+			int max_width, int max_height, int preferred_format = 0)
+		- resizes an image from a remote location or a local file.
+		- puts the resized image at the destination location.
+		- the file would have the format preferred_format if possible,
+		  otherwise the default format is jpeg.
+		- returns whether it succeeded.
+
+	void resizeImage(resource src_img, string destination_filename,
+			int src_width, int src_height, int max_width, int max_height,
+			int preferred_format)
+		- resizes src_img proportionally to fit within max_width and
+		  max_height limits if it is too large.
+		- if GD2 is present, it'll use it to achieve better quality.
+		- saves the new image to destination_filename.
+		- saves as preferred_format if possible, default is jpeg.
+
+	void imagecopyresamplebicubic(resource dest_img, resource src_img,
+			int dest_x, int dest_y, int src_x, int src_y, int dest_w,
+			int dest_h, int src_w, int src_h)
+		- used when imagecopyresample() is not available.
+
+	resource gif_loadFile(string filename, int animation_index)
+		- loads a gif file with the Yamasoft GIF utility class.
+		- returns a new GD image.
+
+	bool gif_outputAsPng(resource gif, string destination_filename,
+			int bgColor = -1)
+		- writes a gif file to disk as a png file.
+		- returns whether it was successful or not.
+
+	bool imagecreatefrombmp(string filename)
+		- is set only if it doesn't already exist (for forwards compatiblity.)
+		- only supports uncompressed bitmaps.
+		- returns an image identifier representing the bitmap image obtained
+		  from the given filename.
+
+	bool showCodeImage(string code)
+		- show an image containing the visual verification code for registration.
+		- requires the GD extension.
+		- uses a random font for each letter from default_theme_dir/fonts.
+		- outputs a gif or a png (depending on whether gif ix supported).
+		- returns false if something goes wrong.
+
+	bool showLetterImage(string letter)
+		- show a letter for the visual verification code.
+		- alternative function for showCodeImage() in case GD is missing.
+		- includes an image from a random sub directory of
+		  default_theme_dir/fonts.
+*/
+
+function downloadAvatar($url, $memID, $max_width, $max_height)
+{
+	global $modSettings, $sourcedir, $smcFunc;
+
+	$ext = !empty($modSettings['avatar_download_png']) ? 'png' : 'jpeg';
+	$destName = 'avatar_' . $memID . '_' . time() . '.' . $ext;
+
+	// Just making sure there is a non-zero member.
+	if (empty($memID))
+		return false;
+
+	require_once($sourcedir . '/ManageAttachments.php');
+	removeAttachments(array('id_member' => $memID));
+
+	$id_folder = !empty($modSettings['currentAttachmentUploadDir']) ? $modSettings['currentAttachmentUploadDir'] : 1;
+	$avatar_hash = empty($modSettings['custom_avatar_enabled']) ? getAttachmentFilename($destName, false, null, true) : '';
+	$smcFunc['db_insert']('',
+		'{db_prefix}attachments',
+		array(
+			'id_member' => 'int', 'attachment_type' => 'int', 'filename' => 'string-255', 'file_hash' => 'string-255', 'fileext' => 'string-8', 'size' => 'int',
+			'id_folder' => 'int',
+		),
+		array(
+			$memID, empty($modSettings['custom_avatar_enabled']) ? 0 : 1, $destName, $avatar_hash, $ext, 1,
+			$id_folder,
+		),
+		array('id_attach')
+	);
+	$attachID = $smcFunc['db_insert_id']('{db_prefix}attachments', 'id_attach');
+	// Retain this globally in case the script wants it.
+	$modSettings['new_avatar_data'] = array(
+		'id' => $attachID,
+		'filename' => $destName,
+		'type' => empty($modSettings['custom_avatar_enabled']) ? 0 : 1,
+	);
+
+	$destName = (empty($modSettings['custom_avatar_enabled']) ? (is_array($modSettings['attachmentUploadDir']) ? $modSettings['attachmentUploadDir'][$modSettings['currentAttachmentUploadDir']] : $modSettings['attachmentUploadDir']) : $modSettings['custom_avatar_dir']) . '/' . $destName . '.tmp';
+
+	// Resize it.
+	if (!empty($modSettings['avatar_download_png']))
+		$success = resizeImageFile($url, $destName, $max_width, $max_height, 3);
+	else
+		$success = resizeImageFile($url, $destName, $max_width, $max_height);
+
+	// Remove the .tmp extension.
+	$destName = substr($destName, 0, -4);
+
+	if ($success)
+	{
+		// Walk the right path.
+		if (!empty($modSettings['currentAttachmentUploadDir']))
+		{
+			if (!is_array($modSettings['attachmentUploadDir']))
+				$modSettings['attachmentUploadDir'] = unserialize($modSettings['attachmentUploadDir']);
+			$path = $modSettings['attachmentUploadDir'][$modSettings['currentAttachmentUploadDir']];
+		}
+		else
+			$path = $modSettings['attachmentUploadDir'];
+
+		// Remove the .tmp extension from the attachment.
+		if (rename($destName . '.tmp', empty($avatar_hash) ? $destName : $path . '/' . $attachID . '_' . $avatar_hash))
+		{
+			$destName = empty($avatar_hash) ? $destName : $path . '/' . $attachID . '_' . $avatar_hash;
+			list ($width, $height) = getimagesize($destName);
+			$mime_type = 'image/' . $ext;
+
+			// Write filesize in the database.
+			$smcFunc['db_query']('', '
+				UPDATE {db_prefix}attachments
+				SET size = {int:filesize}, width = {int:width}, height = {int:height},
+					mime_type = {string:mime_type}
+				WHERE id_attach = {int:current_attachment}',
+				array(
+					'filesize' => filesize($destName),
+					'width' => (int) $width,
+					'height' => (int) $height,
+					'current_attachment' => $attachID,
+					'mime_type' => $mime_type,
+				)
+			);
+			return true;
+		}
+		else
+			return false;
+	}
+	else
+	{
+		$smcFunc['db_query']('', '
+			DELETE FROM {db_prefix}attachments
+			WHERE id_attach = {int:current_attachment}',
+			array(
+				'current_attachment' => $attachID,
+			)
+		);
+
+		@unlink($destName . '.tmp');
+		return false;
+	}
+}
+
+function createThumbnail($source, $max_width, $max_height)
+{
+	global $modSettings;
+
+	$destName = $source . '_thumb.tmp';
+
+	// Do the actual resize.
+	if (!empty($modSettings['attachment_thumb_png']))
+		$success = resizeImageFile($source, $destName, $max_width, $max_height, 3);
+	else
+		$success = resizeImageFile($source, $destName, $max_width, $max_height);
+
+	// Okay, we're done with the temporary stuff.
+	$destName = substr($destName, 0, -4);
+
+	if ($success && @rename($destName . '.tmp', $destName))
+		return true;
+	else
+	{
+		@unlink($destName . '.tmp');
+		@touch($destName);
+		return false;
+	}
+}
+
+function reencodeImage($fileName, $preferred_format = 0)
+{
+	// There is nothing we can do without GD, sorry!
+	if (!checkGD())
+		return false;
+
+	if (!resizeImageFile($fileName, $fileName . '.tmp', null, null, $preferred_format))
+	{
+		if (file_exists($fileName . '.tmp'))
+			unlink($fileName . '.tmp');
+
+		return false;
+	}
+
+	if (!unlink($fileName))
+		return false;
+
+	if (!rename($fileName . '.tmp', $fileName))
+		return false;
+
+	return true;
+}
+
+function checkImageContents($fileName, $extensiveCheck = false)
+{
+	$fp = fopen($fileName, 'rb');
+	if (!$fp)
+		fatal_lang_error('attach_timeout');
+
+	$prev_chunk = '';
+	while (!feof($fp))
+	{
+		$cur_chunk = fread($fp, 8192);
+
+		// Though not exhaustive lists, better safe than sorry.
+		if (!empty($extensiveCheck))
+		{
+			// Paranoid check. Some like it that way.
+			if (preg_match('~(iframe|\\<\\?|\\<%|html|eval|body|script\W|[CF]WS[\x01-\x0C])~i', $prev_chunk . $cur_chunk) === 1)
+			{
+				fclose($fp);
+				return false;
+			}
+		}
+		else
+		{
+			// Check for potential infection
+			if (preg_match('~(iframe|html|eval|body|script\W|[CF]WS[\x01-\x0C])~i', $prev_chunk . $cur_chunk) === 1)
+			{
+				fclose($fp);
+				return false;
+			}
+		}
+		$prev_chunk = $cur_chunk;
+	}
+	fclose($fp);
+
+	return true;
+}
+
+function checkGD()
+{
+	global $gd2;
+
+	// Check to see if GD is installed and what version.
+	if (($extensionFunctions = get_extension_funcs('gd')) === false)
+		return false;
+
+	// Also determine if GD2 is installed and store it in a global.
+	$gd2 = in_array('imagecreatetruecolor', $extensionFunctions) && function_exists('imagecreatetruecolor');
+
+	return true;
+}
+
+function resizeImageFile($source, $destination, $max_width, $max_height, $preferred_format = 0)
+{
+	global $sourcedir;
+
+	// Nothing to do without GD
+	if (!checkGD())
+		return false;
+
+	static $default_formats = array(
+		'1' => 'gif',
+		'2' => 'jpeg',
+		'3' => 'png',
+		'6' => 'bmp',
+		'15' => 'wbmp'
+	);
+
+	require_once($sourcedir . '/Subs-Package.php');
+	@ini_set('memory_limit', '90M');
+
+	$success = false;
+
+	// Get the image file, we have to work with something after all
+	$fp_destination = fopen($destination, 'wb');
+	if ($fp_destination && substr($source, 0, 7) == 'http://')
+	{
+		$fileContents = fetch_web_data($source);
+
+		fwrite($fp_destination, $fileContents);
+		fclose($fp_destination);
+
+		$sizes = @getimagesize($destination);
+	}
+	elseif ($fp_destination)
+	{
+		$sizes = @getimagesize($source);
+
+		$fp_source = fopen($source, 'rb');
+		if ($fp_source !== false)
+		{
+			while (!feof($fp_source))
+				fwrite($fp_destination, fread($fp_source, 8192));
+			fclose($fp_source);
+		}
+		else
+			$sizes = array(-1, -1, -1);
+		fclose($fp_destination);
+	}
+	// We can't get to the file.
+	else
+		$sizes = array(-1, -1, -1);
+
+	// Gif? That might mean trouble if gif support is not available.
+	if ($sizes[2] == 1 && !function_exists('imagecreatefromgif') && function_exists('imagecreatefrompng'))
+	{
+		// Download it to the temporary file... use the special gif library... and save as png.
+		if ($img = @gif_loadFile($destination) && gif_outputAsPng($img, $destination))
+			$sizes[2] = 3;
+	}
+
+	// A known and supported format?
+	if (isset($default_formats[$sizes[2]]) && function_exists('imagecreatefrom' . $default_formats[$sizes[2]]))
+	{
+		$imagecreatefrom = 'imagecreatefrom' . $default_formats[$sizes[2]];
+		if ($src_img = @$imagecreatefrom($destination))
+		{
+			resizeImage($src_img, $destination, imagesx($src_img), imagesy($src_img), $max_width === null ? imagesx($src_img) : $max_width, $max_height === null ? imagesy($src_img) : $max_height, true, $preferred_format);
+			$success = true;
+		}
+	}
+
+	return $success;
+}
+
+function resizeImage($src_img, $destName, $src_width, $src_height, $max_width, $max_height, $force_resize = false, $preferred_format = 0)
+{
+	global $gd2, $modSettings;
+
+	// Without GD, no image resizing at all.
+	if (!checkGD())
+		return false;
+
+	$success = false;
+
+	// Determine whether to resize to max width or to max height (depending on the limits.)
+	if (!empty($max_width) || !empty($max_height))
+	{
+		if (!empty($max_width) && (empty($max_height) || $src_height * $max_width / $src_width <= $max_height))
+		{
+			$dst_width = $max_width;
+			$dst_height = floor($src_height * $max_width / $src_width);
+		}
+		elseif (!empty($max_height))
+		{
+			$dst_width = floor($src_width * $max_height / $src_height);
+			$dst_height = $max_height;
+		}
+
+		// Don't bother resizing if it's already smaller...
+		if (!empty($dst_width) && !empty($dst_height) && ($dst_width < $src_width || $dst_height < $src_height || $force_resize))
+		{
+			// (make a true color image, because it just looks better for resizing.)
+			if ($gd2)
+			{
+				$dst_img = imagecreatetruecolor($dst_width, $dst_height);
+
+				// Deal nicely with a PNG - because we can.
+				if ((!empty($preferred_format)) && ($preferred_format == 3))
+				{
+					imagealphablending($dst_img, false);
+					if (function_exists('imagesavealpha'))
+						imagesavealpha($dst_img, true);
+				}
+			}
+			else
+				$dst_img = imagecreate($dst_width, $dst_height);
+
+			// Resize it!
+			if ($gd2)
+				imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $dst_width, $dst_height, $src_width, $src_height);
+			else
+				imagecopyresamplebicubic($dst_img, $src_img, 0, 0, 0, 0, $dst_width, $dst_height, $src_width, $src_height);
+		}
+		else
+			$dst_img = $src_img;
+	}
+	else
+		$dst_img = $src_img;
+
+	// Save the image as ...
+	if (!empty($preferred_format) && ($preferred_format == 3) && function_exists('imagepng'))
+		$success = imagepng($dst_img, $destName);
+	elseif (!empty($preferred_format) && ($preferred_format == 1) && function_exists('imagegif'))
+		$success = imagegif($dst_img, $destName);
+	elseif (function_exists('imagejpeg'))
+		$success = imagejpeg($dst_img, $destName);
+
+	// Free the memory.
+	imagedestroy($src_img);
+	if ($dst_img != $src_img)
+		imagedestroy($dst_img);
+
+	return $success;
+}
+
+function imagecopyresamplebicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h)
+{
+	$palsize = imagecolorstotal($src_img);
+	for ($i = 0; $i < $palsize; $i++)
+	{
+		$colors = imagecolorsforindex($src_img, $i);
+		imagecolorallocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
+	}
+
+	$scaleX = ($src_w - 1) / $dst_w;
+	$scaleY = ($src_h - 1) / $dst_h;
+
+	$scaleX2 = (int) $scaleX / 2;
+	$scaleY2 = (int) $scaleY / 2;
+
+	for ($j = $src_y; $j < $dst_h; $j++)
+	{
+		$sY = (int) $j * $scaleY;
+		$y13 = $sY + $scaleY2;
+
+		for ($i = $src_x; $i < $dst_w; $i++)
+		{
+			$sX = (int) $i * $scaleX;
+			$x34 = $sX + $scaleX2;
+
+			$color1 = imagecolorsforindex($src_img, imagecolorat($src_img, $sX, $y13));
+			$color2 = imagecolorsforindex($src_img, imagecolorat($src_img, $sX, $sY));
+			$color3 = imagecolorsforindex($src_img, imagecolorat($src_img, $x34, $y13));
+			$color4 = imagecolorsforindex($src_img, imagecolorat($src_img, $x34, $sY));
+
+			$red = ($color1['red'] + $color2['red'] + $color3['red'] + $color4['red']) / 4;
+			$green = ($color1['green'] + $color2['green'] + $color3['green'] + $color4['green']) / 4;
+			$blue = ($color1['blue'] + $color2['blue'] + $color3['blue'] + $color4['blue']) / 4;
+
+			$color = imagecolorresolve($dst_img, $red, $green, $blue);
+			if ($color == -1)
+			{
+				if ($palsize++ < 256)
+					imagecolorallocate($dst_img, $red, $green, $blue);
+				$color = imagecolorclosest($dst_img, $red, $green, $blue);
+			}
+
+			imagesetpixel($dst_img, $i + $dst_x - $src_x, $j + $dst_y - $src_y, $color);
+		}
+	}
+}
+
+if (!function_exists('imagecreatefrombmp'))
+{
+	function imagecreatefrombmp($filename)
+	{
+		global $gd2;
+
+		$fp = fopen($filename, 'rb');
+
+		$errors = error_reporting(0);
+
+		$header = unpack('vtype/Vsize/Vreserved/Voffset', fread($fp, 14));
+		$info = unpack('Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vcolorimportant', fread($fp, 40));
+
+		if ($header['type'] != 0x4D42)
+			false;
+
+		if ($gd2)
+			$dst_img = imagecreatetruecolor($info['width'], $info['height']);
+		else
+			$dst_img = imagecreate($info['width'], $info['height']);
+
+		$palette_size = $header['offset'] - 54;
+		$info['ncolor'] = $palette_size / 4;
+
+		$palette = array();
+
+		$palettedata = fread($fp, $palette_size);
+		$n = 0;
+		for ($j = 0; $j < $palette_size; $j++)
+		{
+			$b = ord($palettedata{$j++});
+			$g = ord($palettedata{$j++});
+			$r = ord($palettedata{$j++});
+
+			$palette[$n++] = imagecolorallocate($dst_img, $r, $g, $b);
+		}
+
+		$scan_line_size = ($info['bits'] * $info['width'] + 7) >> 3;
+		$scan_line_align = $scan_line_size & 3 ? 4 - ($scan_line_size & 3) : 0;
+
+		for ($y = 0, $l = $info['height'] - 1; $y < $info['height']; $y++, $l--)
+		{
+			fseek($fp, $header['offset'] + ($scan_line_size + $scan_line_align) * $l);
+			$scan_line = fread($fp, $scan_line_size);
+
+			if (strlen($scan_line) < $scan_line_size)
+				continue;
+
+			if ($info['bits'] == 32)
+			{
+				$x = 0;
+				for ($j = 0; $j < $scan_line_size; $x++)
+				{
+					$b = ord($scan_line{$j++});
+					$g = ord($scan_line{$j++});
+					$r = ord($scan_line{$j++});
+					$j++;
+
+					$color = imagecolorexact($dst_img, $r, $g, $b);
+					if ($color == -1)
+					{
+						$color = imagecolorallocate($dst_img, $r, $g, $b);
+
+						// Gah!  Out of colors?  Stupid GD 1... try anyhow.
+						if ($color == -1)
+							$color = imagecolorclosest($dst_img, $r, $g, $b);
+					}
+
+					imagesetpixel($dst_img, $x, $y, $color);
+				}
+			}
+			elseif ($info['bits'] == 24)
+			{
+				$x = 0;
+				for ($j = 0; $j < $scan_line_size; $x++)
+				{
+					$b = ord($scan_line{$j++});
+					$g = ord($scan_line{$j++});
+					$r = ord($scan_line{$j++});
+
+					$color = imagecolorexact($dst_img, $r, $g, $b);
+					if ($color == -1)
+					{
+						$color = imagecolorallocate($dst_img, $r, $g, $b);
+
+						// Gah!  Out of colors?  Stupid GD 1... try anyhow.
+						if ($color == -1)
+							$color = imagecolorclosest($dst_img, $r, $g, $b);
+					}
+
+					imagesetpixel($dst_img, $x, $y, $color);
+				}
+			}
+			elseif ($info['bits'] == 16)
+			{
+				$x = 0;
+				for ($j = 0; $j < $scan_line_size; $x++)
+				{
+					$b1 = ord($scan_line{$j++});
+					$b2 = ord($scan_line{$j++});
+
+					$word = $b2 * 256 + $b1;
+
+					$b = (($word & 31) * 255) / 31;
+					$g = ((($word >> 5) & 31) * 255) / 31;
+					$r = ((($word >> 10) & 31) * 255) / 31;
+
+					// Scale the image colors up properly.
+					$color = imagecolorexact($dst_img, $r, $g, $b);
+					if ($color == -1)
+					{
+						$color = imagecolorallocate($dst_img, $r, $g, $b);
+
+						// Gah!  Out of colors?  Stupid GD 1... try anyhow.
+						if ($color == -1)
+							$color = imagecolorclosest($dst_img, $r, $g, $b);
+					}
+
+					imagesetpixel($dst_img, $x, $y, $color);
+				}
+			}
+			elseif ($info['bits'] == 8)
+			{
+				$x = 0;
+				for ($j = 0; $j < $scan_line_size; $x++)
+					imagesetpixel($dst_img, $x, $y, $palette[ord($scan_line{$j++})]);
+			}
+			elseif ($info['bits'] == 4)
+			{
+				$x = 0;
+				for ($j = 0; $j < $scan_line_size; $x++)
+				{
+					$byte = ord($scan_line{$j++});
+
+					imagesetpixel($dst_img, $x, $y, $palette[(int) ($byte / 16)]);
+					if (++$x < $info['width'])
+						imagesetpixel($dst_img, $x, $y, $palette[$byte & 15]);
+				}
+			}
+			else
+			{
+				// Sorry, I'm just not going to do monochrome :P.
+			}
+		}
+
+		fclose($fp);
+
+		error_reporting($errors);
+
+		return $dst_img;
+	}
+}
+
+function gif_loadFile($lpszFileName, $iIndex = 0)
+{
+	// The classes needed are in this file.
+	loadClassFile('Class-Graphics.php');
+	$gif = new gif_file();
+
+	if (!$gif->loadFile($lpszFileName, $iIndex))
+		return false;
+
+	return $gif;
+}
+
+function gif_outputAsPng($gif, $lpszFileName, $background_color = -1)
+{
+	if (!isset($gif) || @get_class($gif) != 'cgif' || !$gif->loaded || $lpszFileName == '')
+		return false;
+
+	$fd = $gif->get_png_data($background_color);
+	if (strlen($fd) <= 0)
+		return false;
+
+	if (!($fh = @fopen($lpszFileName, 'wb')))
+		return false;
+
+	@fwrite($fh, $fd, strlen($fd));
+	@fflush($fh);
+	@fclose($fh);
+
+	return true;
+}
+
+// Create the image for the visual verification code.
+function showCodeImage($code)
+{
+	global $settings, $user_info, $modSettings;
+
+	/*
+		Note: The higher the value of visual_verification_type the harder the verification is - from 0 as disabled through to 4 as "Very hard".
+	*/
+
+	// What type are we going to be doing?
+	$imageType = $modSettings['visual_verification_type'];
+	// Special case to allow the admin center to show samples.
+	if ($user_info['is_admin'] && isset($_GET['type']))
+		$imageType = (int) $_GET['type'];
+
+	// Some quick references for what we do.
+	// Do we show no, low or high noise?
+	$noiseType = $imageType == 3 ? 'low' : ($imageType == 4 ? 'high' : ($imageType == 5 ? 'extreme' : 'none'));
+	// Can we have more than one font in use?
+	$varyFonts = $imageType > 3 ? true : false;
+	// Just a plain white background?
+	$simpleBGColor = $imageType < 3 ? true : false;
+	// Plain black foreground?
+	$simpleFGColor = $imageType == 0 ? true : false;
+	// High much to rotate each character.
+	$rotationType = $imageType == 1 ? 'none' : ($imageType > 3 ? 'low' : 'high');
+	// Do we show some characters inversed?
+	$showReverseChars = $imageType > 3 ? true : false;
+	// Special case for not showing any characters.
+	$disableChars = $imageType == 0 ? true : false;
+	// What do we do with the font colors. Are they one color, close to one color or random?
+	$fontColorType = $imageType == 1 ? 'plain' : ($imageType > 3 ? 'random' : 'cyclic');
+	// Are the fonts random sizes?
+	$fontSizeRandom = $imageType > 3 ? true : false;
+	// How much space between characters?
+	$fontHorSpace = $imageType > 3 ? 'high' : ($imageType == 1 ? 'medium' : 'minus');
+	// Where do characters sit on the image? (Fixed position or random/very random)
+	$fontVerPos = $imageType == 1 ? 'fixed' : ($imageType > 3 ? 'vrandom' : 'random');
+	// Make font semi-transparent?
+	$fontTrans = $imageType == 2 || $imageType == 3 ? true : false;
+	// Give the image a border?
+	$hasBorder = $simpleBGColor;
+
+	// Is this GD2? Needed for pixel size.
+	$testGD = get_extension_funcs('gd');
+	$gd2 = in_array('imagecreatetruecolor', $testGD) && function_exists('imagecreatetruecolor');
+	unset($testGD);
+
+	// The amount of pixels inbetween characters.
+	$character_spacing = 1;
+
+	// What color is the background - generally white unless we're on "hard".
+	if ($simpleBGColor)
+		$background_color = array(255, 255, 255);
+	else
+		$background_color = isset($settings['verification_background']) ? $settings['verification_background'] : array(236, 237, 243);
+
+	// The color of the characters shown (red, green, blue).
+	if ($simpleFGColor)
+		$foreground_color = array(0, 0, 0);
+	else
+	{
+		$foreground_color = array(64, 101, 136);
+
+		// Has the theme author requested a custom color?
+		if (isset($settings['verification_foreground']))
+			$foreground_color = $settings['verification_foreground'];
+	}
+
+	if (!is_dir($settings['default_theme_dir'] . '/fonts'))
+		return false;
+
+	// Get a list of the available fonts.
+	$font_dir = dir($settings['default_theme_dir'] . '/fonts');
+	$font_list = array();
+	$ttfont_list = array();
+	while ($entry = $font_dir->read())
+	{
+		if (preg_match('~^(.+)\.gdf$~', $entry, $matches) === 1)
+			$font_list[] = $entry;
+		elseif (preg_match('~^(.+)\.ttf$~', $entry, $matches) === 1)
+			$ttfont_list[] = $entry;
+	}
+
+	if (empty($font_list))
+		return false;
+
+	// For non-hard things don't even change fonts.
+	if (!$varyFonts)
+	{
+		$font_list = array($font_list[0]);
+		// Try use Screenge if we can - it looks good!
+		if (in_array('Screenge.ttf', $ttfont_list))
+			$ttfont_list = array('Screenge.ttf');
+		else
+			$ttfont_list = empty($ttfont_list) ? array() : array($ttfont_list[0]);
+
+	}
+
+	// Create a list of characters to be shown.
+	$characters = array();
+	$loaded_fonts = array();
+	for ($i = 0; $i < strlen($code); $i++)
+	{
+		$characters[$i] = array(
+			'id' => $code{$i},
+			'font' => array_rand($font_list),
+		);
+
+		$loaded_fonts[$characters[$i]['font']] = null;
+	}
+
+	// Load all fonts and determine the maximum font height.
+	foreach ($loaded_fonts as $font_index => $dummy)
+		$loaded_fonts[$font_index] = imageloadfont($settings['default_theme_dir'] . '/fonts/' . $font_list[$font_index]);
+
+	// Determine the dimensions of each character.
+	$total_width = $character_spacing * strlen($code) + 20;
+	$max_height = 0;
+	foreach ($characters as $char_index => $character)
+	{
+		$characters[$char_index]['width'] = imagefontwidth($loaded_fonts[$character['font']]);
+		$characters[$char_index]['height'] = imagefontheight($loaded_fonts[$character['font']]);
+
+		$max_height = max($characters[$char_index]['height'] + 5, $max_height);
+		$total_width += $characters[$char_index]['width'];
+	}
+
+	// Create an image.
+	$code_image = $gd2 ? imagecreatetruecolor($total_width, $max_height) : imagecreate($total_width, $max_height);
+
+	// Draw the background.
+	$bg_color = imagecolorallocate($code_image, $background_color[0], $background_color[1], $background_color[2]);
+	imagefilledrectangle($code_image, 0, 0, $total_width - 1, $max_height - 1, $bg_color);
+
+	// Randomize the foreground color a little.
+	for ($i = 0; $i < 3; $i++)
+		$foreground_color[$i] = mt_rand(max($foreground_color[$i] - 3, 0), min($foreground_color[$i] + 3, 255));
+	$fg_color = imagecolorallocate($code_image, $foreground_color[0], $foreground_color[1], $foreground_color[2]);
+
+	// Color for the dots.
+	for ($i = 0; $i < 3; $i++)
+		$dotbgcolor[$i] = $background_color[$i] < $foreground_color[$i] ? mt_rand(0, max($foreground_color[$i] - 20, 0)) : mt_rand(min($foreground_color[$i] + 20, 255), 255);
+	$randomness_color = imagecolorallocate($code_image, $dotbgcolor[0], $dotbgcolor[1], $dotbgcolor[2]);
+
+	// Some squares/rectanges for new extreme level
+	if ($noiseType == 'extreme')
+	{
+		for ($i = 0; $i < rand(1, 5); $i++)
+		{
+			$x1 = rand(0, $total_width / 4);
+			$x2 = $x1 + round(rand($total_width / 4, $total_width));
+			$y1 = rand(0, $max_height);
+			$y2 = $y1 + round(rand(0, $max_height / 3));
+			imagefilledrectangle($code_image, $x1, $y1, $x2, $y2, mt_rand(0, 1) ? $fg_color : $randomness_color);
+		}
+	}
+
+	// Fill in the characters.
+	if (!$disableChars)
+	{
+		$cur_x = 0;
+		foreach ($characters as $char_index => $character)
+		{
+			// Can we use true type fonts?
+			$can_do_ttf = function_exists('imagettftext');
+
+			// How much rotation will we give?
+			if ($rotationType == 'none')
+				$angle = 0;
+			else
+				$angle = mt_rand(-100, 100) / ($rotationType == 'high' ? 6 : 10);
+
+			// What color shall we do it?
+			if ($fontColorType == 'cyclic')
+			{
+				// Here we'll pick from a set of acceptance types.
+				$colors = array(
+					array(10, 120, 95),
+					array(46, 81, 29),
+					array(4, 22, 154),
+					array(131, 9, 130),
+					array(0, 0, 0),
+					array(143, 39, 31),
+				);
+				if (!isset($last_index))
+					$last_index = -1;
+				$new_index = $last_index;
+				while ($last_index == $new_index)
+					$new_index = mt_rand(0, count($colors) - 1);
+				$char_fg_color = $colors[$new_index];
+				$last_index = $new_index;
+			}
+			elseif ($fontColorType == 'random')
+				$char_fg_color = array(mt_rand(max($foreground_color[0] - 2, 0), $foreground_color[0]), mt_rand(max($foreground_color[1] - 2, 0), $foreground_color[1]), mt_rand(max($foreground_color[2] - 2, 0), $foreground_color[2]));
+			else
+				$char_fg_color = array($foreground_color[0], $foreground_color[1], $foreground_color[2]);
+
+			if (!empty($can_do_ttf))
+			{
+				// GD2 handles font size differently.
+				if ($fontSizeRandom)
+					$font_size = $gd2 ? mt_rand(17, 19) : mt_rand(18, 25);
+				else
+					$font_size = $gd2 ? 18 : 24;
+
+				// Work out the sizes - also fix the character width cause TTF not quite so wide!
+				$font_x = $fontHorSpace == 'minus' && $cur_x > 0 ? $cur_x - 3 : $cur_x + 5;
+				$font_y = $max_height - ($fontVerPos == 'vrandom' ? mt_rand(2, 8) : ($fontVerPos == 'random' ? mt_rand(3, 5) : 5));
+
+				// What font face?
+				if (!empty($ttfont_list))
+					$fontface = $settings['default_theme_dir'] . '/fonts/' . $ttfont_list[mt_rand(0, count($ttfont_list) - 1)];
+
+				// What color are we to do it in?
+				$is_reverse = $showReverseChars ? mt_rand(0, 1) : false;
+				$char_color = function_exists('imagecolorallocatealpha') && $fontTrans ? imagecolorallocatealpha($code_image, $char_fg_color[0], $char_fg_color[1], $char_fg_color[2], 50) : imagecolorallocate($code_image, $char_fg_color[0], $char_fg_color[1], $char_fg_color[2]);
+
+				$fontcord = @imagettftext($code_image, $font_size, $angle, $font_x, $font_y, $char_color, $fontface, $character['id']);
+				if (empty($fontcord))
+					$can_do_ttf = false;
+				elseif ($is_reverse)
+				{
+					imagefilledpolygon($code_image, $fontcord, 4, $fg_color);
+					// Put the character back!
+					imagettftext($code_image, $font_size, $angle, $font_x, $font_y, $randomness_color, $fontface, $character['id']);
+				}
+
+				if ($can_do_ttf)
+					$cur_x = max($fontcord[2], $fontcord[4]) + ($angle == 0 ? 0 : 3);
+			}
+
+			if (!$can_do_ttf)
+			{
+				// Rotating the characters a little...
+				if (function_exists('imagerotate'))
+				{
+					$char_image = $gd2 ? imagecreatetruecolor($character['width'], $character['height']) : imagecreate($character['width'], $character['height']);
+					$char_bgcolor = imagecolorallocate($char_image, $background_color[0], $background_color[1], $background_color[2]);
+					imagefilledrectangle($char_image, 0, 0, $character['width'] - 1, $character['height'] - 1, $char_bgcolor);
+					imagechar($char_image, $loaded_fonts[$character['font']], 0, 0, $character['id'], imagecolorallocate($char_image, $char_fg_color[0], $char_fg_color[1], $char_fg_color[2]));
+					$rotated_char = imagerotate($char_image, mt_rand(-100, 100) / 10, $char_bgcolor);
+					imagecopy($code_image, $rotated_char, $cur_x, 0, 0, 0, $character['width'], $character['height']);
+					imagedestroy($rotated_char);
+					imagedestroy($char_image);
+				}
+
+				// Sorry, no rotation available.
+				else
+					imagechar($code_image, $loaded_fonts[$character['font']], $cur_x, floor(($max_height - $character['height']) / 2), $character['id'], imagecolorallocate($code_image, $char_fg_color[0], $char_fg_color[1], $char_fg_color[2]));
+				$cur_x += $character['width'] + $character_spacing;
+			}
+		}
+	}
+	// If disabled just show a cross.
+	else
+	{
+		imageline($code_image, 0, 0, $total_width, $max_height, $fg_color);
+		imageline($code_image, 0, $max_height, $total_width, 0, $fg_color);
+	}
+
+	// Make the background color transparent on the hard image.
+	if (!$simpleBGColor)
+		imagecolortransparent($code_image, $bg_color);
+	if ($hasBorder)
+		imagerectangle($code_image, 0, 0, $total_width - 1, $max_height - 1, $fg_color);
+
+	// Add some noise to the background?
+	if ($noiseType != 'none')
+	{
+		for ($i = mt_rand(0, 2); $i < $max_height; $i += mt_rand(1, 2))
+			for ($j = mt_rand(0, 10); $j < $total_width; $j += mt_rand(1, 10))
+				imagesetpixel($code_image, $j, $i, mt_rand(0, 1) ? $fg_color : $randomness_color);
+
+		// Put in some lines too?
+		if ($noiseType != 'extreme')
+		{
+			$num_lines = $noiseType == 'high' ? mt_rand(3, 7) : mt_rand(2, 5);
+			for ($i = 0; $i < $num_lines; $i++)
+			{
+				if (mt_rand(0, 1))
+				{
+					$x1 = mt_rand(0, $total_width);
+					$x2 = mt_rand(0, $total_width);
+					$y1 = 0; $y2 = $max_height;
+				}
+				else
+				{
+					$y1 = mt_rand(0, $max_height);
+					$y2 = mt_rand(0, $max_height);
+					$x1 = 0; $x2 = $total_width;
+				}
+				imagesetthickness($code_image, mt_rand(1, 2));
+				imageline($code_image, $x1, $y1, $x2, $y2, mt_rand(0, 1) ? $fg_color : $randomness_color);
+			}
+		}
+		else
+		{
+			// Put in some ellipse
+			$num_ellipse = $noiseType == 'extreme' ? mt_rand(6, 12) : mt_rand(2, 6);
+			for ($i = 0; $i < $num_ellipse; $i++)
+			{
+				$x1 = round(rand(($total_width / 4) * -1, $total_width + ($total_width / 4)));
+				$x2 = round(rand($total_width / 2, 2 * $total_width));
+				$y1 = round(rand(($max_height / 4) * -1, $max_height + ($max_height / 4)));
+				$y2 = round(rand($max_height / 2, 2 * $max_height));
+				imageellipse($code_image, $x1, $y1, $x2, $y2, mt_rand(0, 1) ? $fg_color : $randomness_color);
+			}
+		}
+	}
+
+	// Show the image.
+	if (function_exists('imagegif'))
+	{
+		header('Content-type: image/gif');
+		imagegif($code_image);
+	}
+	else
+	{
+		header('Content-type: image/png');
+		imagepng($code_image);
+	}
+
+	// Bail out.
+	imagedestroy($code_image);
+	die();
+}
+
+// Create a letter for the visual verification code.
+function showLetterImage($letter)
+{
+	global $settings;
+
+	if (!is_dir($settings['default_theme_dir'] . '/fonts'))
+		return false;
+
+	// Get a list of the available font directories.
+	$font_dir = dir($settings['default_theme_dir'] . '/fonts');
+	$font_list = array();
+	while ($entry = $font_dir->read())
+		if ($entry[0] !== '.' && is_dir($settings['default_theme_dir'] . '/fonts/' . $entry) && file_exists($settings['default_theme_dir'] . '/fonts/' . $entry . '.gdf'))
+			$font_list[] = $entry;
+
+	if (empty($font_list))
+		return false;
+
+	// Pick a random font.
+	$random_font = $font_list[array_rand($font_list)];
+
+	// Check if the given letter exists.
+	if (!file_exists($settings['default_theme_dir'] . '/fonts/' . $random_font . '/' . $letter . '.gif'))
+		return false;
+
+	// Include it!
+	header('Content-type: image/gif');
+	include($settings['default_theme_dir'] . '/fonts/' . $random_font . '/' . $letter . '.gif');
+
+	// Nothing more to come.
+	die();
+}
+
+?>
\ No newline at end of file