Source for file LFontgen.php

<?php
/**
 * Class file.
 *
 * @license http://opensource.org/licenses/mozilla1.1.php Mozilla Public License
 * @copyright 2005, diemeisterei GmbH. All rights reserved.
 * @author $Author: schmunk $
 * @version $Revision: 236 $  $Date: 2006-05-30 23:39:46 +0200 (Di, 30 Mai 2006) $ $HeadURL: https://svn.sourceforge.net/svnroot/lithron/trunk/packages/LContainer/LBrick.php $
 * @package Lithron
 * @subpackage none
 */
 
/**
 * LFontgen
 *
 * Adds the ability to render custom font text images
 *
 * @package System.Web.UI.WebControls
 * @subpackage None
 */
class LFontgen extends TControl
{
    protected $OutputDir = "";
    protected $RealOutputDir = "";
    protected $BinPath = "";
 
    protected $HTCUrl = "";
 
    protected $FontID;
    protected $AscenderHeight;
    protected $DescenderHeight;
    protected $SpaceWidth;
    
    protected $FR = 0;
    protected $FG = 0;
    protected $FB = 0;
    protected $FA = 0;
    
    protected $BR = 0;
    protected $BG = 0;
    protected $BB = 0;
    protected $BA = 127;
    
    
    public function getText()
    {
        return $this->getViewState('Text','');
    }
    public function setText($value)
    {
        $this->setViewState('Text',$value,'');
    }
 
    public function getFont()
    {
        return $this->getViewState('Font','');
    }
    public function setFont($value)
    {
        $this->setViewState('Font',$value,'');
    }
 
    public function getFontSize()
    {
        return $this->getViewState('FontSize',60);
    }
    public function setFontSize($value)
    {
        $this->setViewState('FontSize',$value,60);
    }
 
    public function getLineHeight()
    {
        return $this->getViewState('LineHeight',$this->getFontSize());
    }
    public function setLineHeight($value)
    {
        $this->setViewState('LineHeight',$value,$this->getFontSize());
    }
 
    public function getColor()
    {
        return $this->getViewState('Color',"");
    }
    public function setColor($value)
    {
        $this->setViewState('Color',$value,"");
    }
 
    public function getBackgroundColor()
    {
        return $this->getViewState('BackgroundColor',"");
    }
    public function setBackgroundColor($value)
    {
        $this->setViewState('BackgroundColor',$value,"");
    }
 
    public function getSpace()
    {
        return $this->getViewState('Space',0);
    }
    public function setSpace($value)
    {
        $this->setViewState('Space',$value,0);
    }
 
    public function getTightness()
    {
        return $this->getViewState('Tightness',0);
    }
    public function setTightness($value)
    {
        $this->setViewState('Tightness',$value,0);
    }
 
    public function getAngle()
    {
        return $this->getViewState('Angle',0);
    }
    public function setAngle($value)
    {
        $this->setViewState('Angle',$value,0);
    }
 
    public function getAASteps()
    {
        return $this->getViewState('AASteps',16);
    }
    public function setAASteps($value)
    {
        $this->setViewState('AASteps',$value,16);
    }
 
    public function extractColor($colString, &$R, &$G, &$B, &$A)
    {
        $matches = array();
        $single = true;
        preg_match("/^#([0-9A-Fa-f])([0-9A-Fa-f])([0-9A-Fa-f])$/", $colString, $matches);
        if (count($matches) == 0)
        {
            preg_match("/^#([0-9A-Fa-f]{2})([0-9A-Fa-f]{2})([0-9A-Fa-f]{2})$/", $colString, $matches);
            $single = false;
        }
        if (count($matches) == 0)
            return false;
            
        $R = hexdec($matches[1]);
        $G = hexdec($matches[2]);
        $B = hexdec($matches[3]);
        $A = 0;
        if ($single)
        {
            $R *= 17;
            $G *= 17;
            $B *= 17;
        }
        return true;
    }
 
    public function onPreRender($param)
    {
        parent::onPreRender($param);
 
        $this->HTCUrl = $this->publishAsset("png_ie.htc");
 
        $param = $this->Application->getParameters();
        $this->OutputDir= $param->itemAt("OutputDir");
        $this->RealOutputDir = realpath($this->OutputDir);
 
        //echo "font:{$this->Font}<br>";
        $this->FontID = imagepsloadfont($this->getFont());
 
        // get ascender & descender & space width
        list($lx,$ly,$rx,$ry) = imagepsbbox("A", $this->FontID, $this->getFontSize());
        $this->AscenderHeight = $ry - $ly;
        list($lx,$ly,$rx,$ry) = imagepsbbox("g", $this->FontID, $this->getFontSize());
        $this->DescenderHeight = - $ly;
        list($lx,$ly,$rx,$ry) = imagepsbbox("x", $this->FontID, $this->getFontSize());
        $this->SpaceWidth = $rx;
        //echo "asc:{$this->AscenderHeight},desc:{$this->DescenderHeight},sw:{$this->SpaceWidth}<br>";
        
        // get color
        $fgAvail = $this->extractColor($this->getColor(), $this->FR, $this->FG, $this->FB, $this->FA);
        $bgAvail = $this->extractColor($this->getBackgroundColor(), $this->BR, $this->BG, $this->BB, $this->BA);
        if (!$bgAvail && $fgAvail)
        {
            $this->BR = $this->FR;
            $this->BG = $this->FG;
            $this->BB = $this->FB;
        }
    }
 
 
    public function renderWordGD($word)
    {
        $id = array();
        $id[] = $word; $id[] = $this->getFont(); $id[] = $this->getFontSize(); $id[] = $this->getLineHeight();
        $id[] = $this->getSpace(); $id[] = $this->getTightness(); $id[] = $this->getAngle(); $id[] = $this->getAASteps();
        $id[] = $this->FR; $id[] = $this->FG; $id[] = $this->FB; $id[] = $this->FA;
        $id[] = $this->BR; $id[] = $this->BG; $id[] = $this->BB; $id[] = $this->BA;
        
        $hash = md5(implode("|", $id));
        $name = $this->OutputDir."/".$hash.".png";
        $realname = $this->RealOutputDir."/".$hash.".png";
        if (file_exists($realname)) return $name;
 
        //get the left lower corner and the right upper
        list($lx,$ly,$rx,$ry) = imagepsbbox($word, $this->FontID, $this->getFontSize(), $this->getSpace(), $this->getTightness(), $this->getAngle());
        
        $im = imagecreatetruecolor($rx+1, $this->getLineHeight()+1);
        imagealphablending($im, false);
        imagesavealpha($im, true);
        $fgcol = imagecolorallocatealpha($im, $this->FR, $this->FG, $this->FB, $this->FA);
        $bgcol = imagecolorallocatealpha($im, $this->BR, $this->BG, $this->BB, $this->BA);
        imagefill($im, 0, 0, $bgcol);
        imagepstext($im, $word, $this->FontID, $this->getFontSize(), $fgcol, $bgcol, 0, $this->getLineHeight() - $this->DescenderHeight, $this->getSpace(), $this->getTightness(), $this->getAngle(), $this->getAASteps());
        imagepng($im, $realname);
        imagedestroy($im);
            
        return $name;    
    }
 
 
    /**
     * Renders body content.
     * @param THtmlWriter writer
     */
    public function render($writer)
    {
        if ($this->FontID === false) return;
 
        $text = $this->getText();
        $words = split(" ", $text);
        foreach($words as $i => $word) 
        {
            $words[$i] = trim($word);
            if ($words[$i] == "") unset($words[$i]);
        }
 
        foreach($words as $wnum => $word)
        {
            //echo "generating word $word<br>";
            $file = $this->renderWordGD($word);
 
            $writer->addAttribute('src', $file);
            $writer->addAttribute('alt', $word);
            $writer->addAttribute('border', '0');
            //$writer->addStyleAttribute('border-width','0px');
            if ($wnum < count($words)-1)
                $writer->addStyleAttribute('margin-right',($this->SpaceWidth+$this->getSpace()-1).'px');
            $writer->addStyleAttribute('position','relative');
            $writer->addStyleAttribute('top', ($this->DescenderHeight+1).'px');
            $writer->addStyleAttribute('behavior','url(\''.$this->HTCUrl.'\')');
            $writer->renderBeginTag('img');
            $writer->renderEndTag();
        }    
 
        imagepsfreefont($this->FontID);
    }    
}
?>