<?php
/*****************************************************************************
 * textImg Class - Editing some text in image with the GD 2 library
 *
 * @version 1
 * @copyright Christophe Helson march 2006
 */

class textImg {

    public $img; //resource
	public $width; //width
    public $height; //height
    public $string;
    public $font;
    public $size;
    public $angle;
    public $color; //integer

    const PRE = "font/"; //path to the fonts folder
	const DFONT = "font/andy.ttf"; //default values
	const DSIZE = 20;
	const DANGLE = 0;
	const WALL = "../images/brickwall.png"; //the background image
	const THUMB = "../images/thumb.png"; //temporary thumbnail result
	const SAMPLE = "../images/sample.png"; //choosen color sample

    static public function sample($tabcol,$file=self::SAMPLE){
    	$samp = imagecreatetruecolor(20,20);
    	$color = imagecolorallocate($samp,$tabcol[0],$tabcol[1],$tabcol[2]);
    	imagefill($samp,0,0,$color);
		imagepng($samp,$file);
    }

	public function __construct($string=" ",$font=self::DFONT,$size=self::DSIZE,$angle=self::DANGLE,$color="") {
		$this->width = 100;
		$this->height = 100; //fake values, these two variables will be updated later
		$this->img = imagecreatetruecolor($this->width,$this->height);
		$this->chgstring($string);
		$this->chgfont($font);
		$this->chgsize($size);
		$this->chgangle($angle);
		if ($color=="") { //default color
			$grey = imagecolorallocate($this->img,100,100,100);
			$this->color = $grey;
			}
		else $this->chgcolor($color);
		$this->update();
	}

	public function __destruct() {
	    imagedestroy($this->img);
	}

	public function chgstring($string){
		$this->string = stripslashes($string);
	}

	public function chgfont($string){  //andy | bickley | chiller | gigi | gothice | harlowsi | jokerman | mistral
		$this->font = realpath(self::PRE.$string.".ttf");
	}

	public function chgsize($size){
		$this->size = $size;
	}

	public function chgcolor($tab){
		if ($tab[0]==0 and $tab[1]==0 and $tab[2]==0) { //the pure black (0,0,0) is used for transparency color
			$tab[2]=1;
		}
		$this->color = imagecolorallocate($this->img,$tab[0],$tab[1],$tab[2]);
	}

	public function chgangle($angle){
		$this->angle = $angle;
	}

	public function update(){
		$black = imagecolorallocate($this->img,0,0,0);
		$shift = imagefontheight($this->font);
		putenv('GDFONTPATH=' . realpath(self::PRE));
		$pos = imagettftext($this->img,$this->size,$this->angle,0,0,$black,$this->font,$this->string); //the purpose of this line is only to get the 4 positions of the rectangle
		$this->width = max(abs($pos[0]-$pos[4]),abs($pos[2]-$pos[6])) + 2*$shift;
		$this->height = max(abs($pos[1]-$pos[5]),abs($pos[3]-$pos[7])) + 2*$shift;
		$this->img = imagecreatetruecolor($this->width,$this->height);
		imagealphablending($this->img,false);
		imagefill($this->img,0,0,$black);
		imagecolortransparent($this->img,$black);
		if ($this->angle>=0) imagettftext($this->img,$this->size,$this->angle,$shift+max(abs($pos[0]),abs($pos[6])),$this->height-$shift,$this->color,$this->font,$this->string);
		else imagettftext($this->img,$this->size,$this->angle,$shift,abs($pos[1]-$pos[7])+$shift,$this->color,$this->font,$this->string);
		imagepng($this->img,self::THUMB);
	}

	public function merge($x,$y){ //writes the thumbnail on the background image
		$wall = self::WALL;
		$imgwall = imagecreatefrompng($wall);
		$x = $x-($this->width/2);
		$y = $y-($this->height/2);
		$var = imagecopymerge($imgwall,$this->img,$x,$y,0,0,$this->width,$this->height,80);
		imagepng($imgwall,$wall);
		$numb = rand(0,5);
		if ($numb==4) { //sometimes creates a backup copy image
			$var = date('y-m-d_H-i-s');
			$backup = "../images/temp/brickwall".$var.".png";
			imagepng($imgwall,$backup);
		}
	}

}

?>