GD Questions

[Kokos]

First, I have some problems when creating security images. For some reason I always have this, when I create too many characters or things with colors the latest characters just turn grey. Heres an example (yes the captcha is weak but its just for showing)


and another, in some captchas I see that text gets distorted, twisted and such. how do I do that?
Greets and thanks in advance

[bokehman]

You need to post some code.

[Kokos]

K, but the wierd thing is that it happens with every color thing I make....

    function writeCode(){
        for($i = 0;$i < $this->iLength;$i++){
            $sFont = "font.ttf";
            $this->iSize = rand(14,20);
            $sChar_y = rand($this->iHeight-15,$this->iHeight-5);
            $iAngle = rand(-10,10);
            $a = rand(150,255);
            $b = rand(150,255);
            $c = rand(150,255);
            $d = rand(0,150);
            $e = rand(0,150);
            $f = rand(0,150);
            $oColor = imagecolorallocate($this->oImage,$a,$b,$c);
            $oColor2 = imagecolorallocate($this->oImage,$d,$e,$f);
            imagettftext($this->oImage,$this->iSize,$iAngle,15+($i*$this->iSpacing),$sChar_y+1,$oColor2,$sFont,$this->aCode[$i]);
            imagettftext($this->oImage,$this->iSize,$iAngle,15+($i*$this->iSpacing)+1,$sChar_y,$oColor2,$sFont,$this->aCode[$i]);
            imagettftext($this->oImage,$this->iSize,$iAngle,14+($i*$this->iSpacing),$sChar_y,$oColor,$sFont,$this->aCode[$i]);
        }
    } 

this is the part of my class that writes the code to the image

[Kokos]

nobody?

[bokehman]

Your code is OOP and you have only posted one method. That makes it impossible for anyone to run the code.

[Kokos]

K Ill give the full code, just didnt think it mattered:

class captcha{
    var $oImage;
    var $iWidth;
    var $iHeight;
    var $iLength;
    var $iSize;
    var $iSpacing;
    var $aCode;

    function setVars(){
        $this->iWidth = 100;
        $this->iHeight = 35;
        $this->iLength = 4;
        $this->iSpacing = ($this->iWidth/$this->iLength)-6;
    }
    
    function setImage(){
        $this->oImage = imagecreate($this->iWidth,$this->iHeight);
        imagecolorallocate($this->oImage,230,230,230);
    }
    
    function setBorder(){
        $oColor = imagecolorallocate($this->oImage,160,160,160);
        imageline($this->oImage,0,0,0,$this->iHeight,$oColor);
        imageline($this->oImage,0,0,$this->iWidth,0,$oColor);
        imageline($this->oImage,$this->iWidth-1,0,$this->iWidth-1,$this->iHeight-1,$oColor);
        imageline($this->oImage,0,$this->iHeight-1,$this->iWidth-1,$this->iHeight-1,$oColor);
    }
    
    function genCode(){
        $aChars = array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","1","2","3","4","5","6","7","8","9");
        $iTotal = count($aChars);
        for($i = 0;$i < $this->iLength;$i++){
            $x = rand(1,$iTotal);
            $aChar = $aChars[$x];
            $this->aCode[$i] = $aChar;
        }
        return $this->aCode;
    }
    
    function genNoise(){
        imagefilter($this->oImage,IMG_FILTER_MEAN_REMOVAL);
        imagefilter($this->oImage,IMG_FILTER_EDGEDETECT);
    }
    
    function writeCode(){
        for($i = 0;$i < $this->iLength;$i++){
            $sFont = "font.ttf";
            $this->iSize = rand(14,20);
            $sChar_y = rand($this->iHeight-15,$this->iHeight-5);
            $iAngle = rand(-10,10);
            $a = rand(150,255);
            $b = rand(150,255);
            $c = rand(150,255);
            $d = rand(0,150);
            $e = rand(0,150);
            $f = rand(0,150);
            $oColor = imagecolorallocate($this->oImage,$a,$b,$c);
            $oColor2 = imagecolorallocate($this->oImage,$d,$e,$f);
            imagettftext($this->oImage,$this->iSize,$iAngle,15+($i*$this->iSpacing),$sChar_y+1,$oColor2,$sFont,$this->aCode[$i]);
            imagettftext($this->oImage,$this->iSize,$iAngle,15+($i*$this->iSpacing)+1,$sChar_y,$oColor2,$sFont,$this->aCode[$i]);
            imagettftext($this->oImage,$this->iSize,$iAngle,14+($i*$this->iSpacing),$sChar_y,$oColor,$sFont,$this->aCode[$i]);
        }
    }
    
    function createImage(){
        $this->setVars();
        $this->setImage();
        $this->setBorder();
        $this->genCode();
        $this->writeCode();
        //$this->genNoise();
        imagepng($this->oImage,"image.png");
        imagedestroy($this->oImage);
        return implode('',$this->aCode);
    }
} 

[Kokos]

:O need help