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141 lines
4.0 KiB
PHP
141 lines
4.0 KiB
PHP
<?php
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/**
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* EGroupware API: Creating letter avatar
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage avatar
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* @author Hadi Nategh <hn@egroupware.de>
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* @version $Id$
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*/
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namespace EGroupware\Api;
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/**
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* Creating letter avatar
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*
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* lavatar class designed for creating avatar image from given
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* user firstname.lastname and outputs them as in image consist of
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* first letter of the firstname plus first letter of the lastname.
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*/
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class avatar
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{
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// background colors
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private static $BG_COLORS = array(
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array(90,135,112), array(178,183,187), array(111,169,171), array(245,175,41),
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array(0,136,185), array(241,134,54), array(217,58,55), array(166,177,46),
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array(0,136,185), array(241,134,54), array(217,58,55), array(166,177,46),
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array(92,155,188), array(245,136,141), array(154,137,181), array(64,120,135),
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array(154,137,181),array(90,135,112), array(211,63,51), array(162,176,31),
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array(240,177,38),array(0,135,191), array(241,134,54), array(0,135,191),
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array(178,183,187),array(114,172,174), array(156,138,180), array(90,135,112),
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array(238,180,36),array(64,120,135)
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);
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// ratio of font size to size
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private static $_FONT_SIZE_RATIO = 3.2;
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// ratio of text Y position to size
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private static $_TEXT_Y_RATIO = 1.6;
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private static $_TEXT_COLOR = array (255, 255, 255);
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// font path
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private static $_FONT_PATH = '/api/templates/default/fonts/arial.ttf';
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public function __construct() {
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}
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/**
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* Function to generate letter avatar image out of given
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* user firstname and lastname.
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*
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* @param array $_content = null an array of firstname lastname
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* example:
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* array (
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* 'firstname' => [userFirstname],
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* 'lastname' => [userLastname],
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* 'id' => [user id]
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* )
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* @param array $_color = null an array of RGB color, default
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* is nul to get a random color from color library.
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* example: white color
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* array (
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* 0, // RED
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* 0, // GREEN
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* 0 // BLUE
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* )
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* @param int $_size = 128 image size, default size is 128
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*/
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public static function lavatar ($_content = null, $_color = null, $_size = 128)
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{
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// firstname
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$firstname = isset($_content['firstname'])? $_content['firstname'] : '';
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//lastname
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$lastname = isset($_content['lastname'])? $_content['lastname'] : '';
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// id
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$id = isset($_content['id'])? $_content['id']: '';
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// Array of RGB color as background color
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$bgcolor = $_color ? $_color : self::_getBgColor($firstname.$lastname.$id);
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// Letters to be shown
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$text = strtoupper(mb_substr($firstname, 0, 1).mb_substr($lastname, 0, 1));
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//create an image
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$image = imagecreatetruecolor($_size, $_size);
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// allocate an image color as background color
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$bg = imagecolorallocate($image, $bgcolor[0], $bgcolor[1], $bgcolor[2]);
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// allocate an image color as textcolor
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$textcolor = imagecolorallocate($image, self::$_TEXT_COLOR[0],self::$_TEXT_COLOR[1],self::$_TEXT_COLOR[2]);
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// create a rectangle
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imagefilledrectangle($image, 0, 0, $_size, $_size, $bg);
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$fontsize = $_size / self::$_FONT_SIZE_RATIO;
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$box = imagettfbbox($fontsize, 0, EGW_SERVER_ROOT.self::$_FONT_PATH, $text);
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$x = floor(($_size - ($box[2] - $box[0]))/2);
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$y = floor ($_size / self::$_TEXT_Y_RATIO);
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// write a ttf text
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$ttf = imagettftext($image, $fontsize, 0, $x, $y, $textcolor, EGW_SERVER_ROOT.self::$_FONT_PATH, $text);
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if ($ttf)
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{
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ob_start();
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imagejpeg($image, null,50);
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$result = ob_get_contents();
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ob_clean();
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imagedestroy($image);
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return $result;
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}
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else
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{
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imagedestroy($image);
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}
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}
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/**
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* Function to select a color code from background colors array
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* base on given string phrase. (FirstName LastName Id)
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*
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* @param string $_str string to convert to a color code
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*
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* @return string color code
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*/
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private static function _getBgColor ($_str)
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{
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$hash = 0;
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for ($i=0; $i< strlen($_str); $i++)
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{
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$hash = ord($_str[$i]) + $hash;
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}
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$index = $hash % count(self::$BG_COLORS);
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return self::$BG_COLORS[$index];
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}
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}
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