how to fix edges of dynamic transparent generated PNG images from text

245 100+

Hey all,
I have created transparent PNG images from text dynamically. But it edges are pixel-ate or we can say edges are distorted.
Here is my LINK which shows my generated transparent PNG image. Can someone help me out to sort out my problem i will be very grateful to him as i am stuck bad with this issue and i am not figuring out how to fix this.

Here is my Code which generate transparent PNG images

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 <img src="generate-headings.php?text=Company Profile&font_color=F67538" alt="Company Profile" border="0" />
 

Generate-headings.php file code

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<?

    //$font_file  = 'fonts/arial.ttf' ;

    //$font_file  = 'fonts/EurostileLTStd-Demi.otf';

    if($_GET['font_file']){$font_file  = "fonts/".$_GET['font_file'].".ttf";}else{$font_file = 'fonts/arial.ttf';}

    if($_GET['font_size']){$font_size  = $_GET['font_size'] ;}else{$font_size = 18 ;}

    if($_GET['font_color']){$font_color  = '#'.$_GET['font_color'];}else{$font_color = '#ffffff';}

    if($_GET['bg_color']){$background_color = '#'.$_GET['bg_color'];}else{$background_color = '#ffffff';}
 
    $transparent_background  = true ;

    $cache_images = true ;

    $cache_folder = 'cache' ;
 
    $mime_type = 'image/png' ;

    $extension = '.png' ;

    $send_buffer_size = 4096 ;
 
    $text = $_GET['text'];

    //$text = "Mohsin";
 
    if(get_magic_quotes_gpc()){

        $text = stripslashes($text) ;

    }

    $text = javascript_to_html($text) ;
 
    // look for cached copy, send if it exists

    $hash = md5(basename($font_file) . $font_size . $font_color . $background_color . $transparent_background . $text) ;

    $cache_filename = $cache_folder . '/' . $hash . $extension ;

    if($cache_images && ($file = @fopen($cache_filename,'rb'))){

        header('Content-type: ' . $mime_type) ;

        while(!feof($file))

            print(($buffer = fread($file,$send_buffer_size))) ;

        fclose($file) ;

        exit ;

    }
 
    // check font availability

    $font_found = is_readable($font_file) ;

    if(!$font_found){

        //fatal_error('Error: The server is missing the specified font.') ;

    }
 
    // create image

    $background_rgb = hex_to_rgb($background_color) ;

    $font_rgb = hex_to_rgb($font_color) ;

    $dip = get_dip($font_file,$font_size) ;

    $box = @imagettfbbox($font_size,0,$font_file,$text);

    if($_GET['width']){

        $width=$_GET['width'];

    }else{

        $width=(abs($box[2]-$box[0])+4);

    }

    $image = @imagecreate($width,abs($box[5]-$dip)) ;

    if(!$image || !$box){

        fatal_error('Error: The server could not create this heading image.') ;

    }
 
    // allocate colors and draw text

    $background_color = @ImageColorAllocate($image,$background_rgb['red'],$background_rgb['green'],$background_rgb['blue']) ;

    $font_color = ImageColorAllocate($image,$font_rgb['red'],$font_rgb['green'],$font_rgb['blue']) ;   

    ImageTTFText($image,$font_size,0,-$box[0],abs($box[5]-$box[3])-$box[1],$font_color,$font_file,$text) ;
 
    // set transparency

    if($transparent_background)

        imagecolortransparent($image,$background_color) ;
 
    header('Content-type: ' . $mime_type) ;

    ImagePNG($image) ;
 
    // save copy of image for cache

    if($cache_images){

        @imagepng($image,$cache_filename) ;

    }
 
    imagedestroy($image) ;

    exit ;
 
    /*$im = imagecreatetruecolor(300, 18);

    $white = imagecolorallocate($im, 255, 255, 255);

    $black = imagecolorallocate($im, 0, 0, 0);

    imagefilledrectangle($im, 0, 0, imagesx($im), imagesy($im), gd_bkg());

    $text = $_GET[hd];

    $font = "fonts/Abduction.ttf";

    imagettftext($im,14,0,0,13,$black,$font,$text);

    imagepng($im);

    imagedestroy($im);
 
    $background_rgb = hex_to_rgb($background_color) ;

    $background_color = @ImageColorAllocate($image,$background_rgb['red'],*/
 
    //=============================== FUNCTIONS =================

    function javascript_to_html($text){

        $matches = null ;

        preg_match_all('/%u([0-9A-F]{4})/i',$text,$matches) ;

        if(!empty($matches)) for($i=0;$i<sizeof($matches[0]);$i++)

            $text = str_replace($matches[0][$i],'&#'.hexdec($matches[1][$i]).';',$text) ;

        return $text ;

    }

    function hex_to_rgb($hex){

        // remove '#'

        if(substr($hex,0,1) == '#')

            $hex = substr($hex,1) ;
 
        // expand short form ('fff') color

        if(strlen($hex) == 3){

            $hex = substr($hex,0,1) . substr($hex,0,1) . substr($hex,1,1) . substr($hex,1,1) . substr($hex,2,1) . substr($hex,2,1) ;

        }
 
        if(strlen($hex) != 6)

            fatal_error('Error: Invalid color "'.$hex.'"') ;
 
        // convert

        $rgb['red'] = hexdec(substr($hex,0,2)) ;

        $rgb['green'] = hexdec(substr($hex,2,2)) ;

        $rgb['blue'] = hexdec(substr($hex,4,2)) ;
 
        return $rgb ;

    }

    function get_dip($font,$size){

        $test_chars = 'abcdefghijklmnopqrstuvwxyz' .

                      'ABCDEFGHIJKLMNOPQRSTUVWXYZ' .

                      '1234567890' .

                      '!@#$%^&*()\'"\\/;.,`~<>[]{}-+_-=' ;

        $box = @ImageTTFBBox($size,0,$font,$test_chars) ;

        return $box[3] ;

    }

?>