Trying to arc text on an image layer. GD Liibrary??

[bobinindia]

Is it possible to generate arced text. I can keep the arc constant but need to able to change the text.

Any chance? ???

[trq]

In what? html?

[bobinindia]

yes it will then generate an html page

[trq]

Can't be done in html Im afraid.

[bobinindia]

but can it be done sever side and then create an image which then be displayed like any other image?

[trq]

Can't see why you couldn't do it with imagearc, Ive never tried it though so couldn't really help.

[bobinindia]

Thanks for your help. I am experimenting!?! :-\

 

[bobinindia]

So here is the code. I want to imagerotate()  each character from imagechar() before it is printed.

Any suggestions?

 

<?php

 

$string = '1 2 3 4 5 6 7 8 9 A B C D E F G';

$font_size = 5;

$width=imagefontwidth($font_size)*strlen($string);

$height=imagefontheight($font_size)*2;

$img = imagecreate($width,$height);

$bg = imagecolorallocate($img,225,225,225);

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

$len=strlen($string);

$r = 100;

 

for($i=0;$i<$len;$i++)

{

    $xpos=$i*imagefontwidth($font_size);

    $ypos=6;

//somehow rotate in here below

    imagechar($img,$font_size,$xpos,$ypos,$string,$black);

    $string = substr($string,1);

   

   

 

}

header("Content-Type: image/gif");

imagegif($img);

imagedestroy($img);

?>

[helraizer]

Umm.. I think you'll have to improvise on this one. There is no easy way to create arced text as a whole, as such that I know of.. But with imagettftext:

 

imagettftext  ( resource $image  , float $size  , float $angle  , int $x  , int $y  , int $color  , string $fontfile  , string $text  )

 

the third element is float angle, which you can set to face the character facing from 0 to 359 degrees. If you have $string, you can use $str_split($string, 1) to split the string up into one character chunks. Then use imagettftext for all of them, using a slightly different angle for each and a slightly different x and y co-ord. Will give an arced effect, with experimenting.

 

Hope that helps?

 

Sam

[Barand]

In the FAQ/code snippets

 

http://www.phpfreaks.com/forums/index.php/topic,147174.0.html

[bobinindia]

So here is the solution as it must be shared.

Thank you all for your suggestions.

<?php
//This works with GD2 and PHP 5.

    $text = "SAI BABA SAI BABA SAI BABA ";
   
    $image = imagecreatefromjpeg("frontrange.jpeg");
    $white = imagecolorallocate($image,255,255,255);
    imagefill($image,0,0,$white);
    $red = imagecolorallocate($image,255,0,0);

    $degrees = (360/strlen($text));

    for ($i=0;$i<strlen($text);$i++) {

        $a = ($degrees*$i)+180;

        $cos = cos(deg2rad($a));
        $sin = sin(deg2rad($a));
        $x = 0;
        $y = 70;
        $xt = round($cos*($x) - $sin*($y));
        $yt = round($sin*($x) + $cos*($y));
        imagettftext($image,20,180-($a),110+$xt,100+$yt,$red,"Fonts/Palatino",$text[$i]);
       
    }
   
    header("Content-type: image/jpeg");
    imagejpeg($image,"",100);
    imagedestroy($image);
   
?>

[Barand]

You can get rid of the saw-tooth effect on the character baselines by getting the angle at the midpoint of the characters' baselines rather than at the bottom left.

[bobinindia]

 

Hi Barand,

How do I get the angle at the midpoint of the characters baselines as you suggested?

imagettftext() by default sets the angle from the bottom left. Is there a way around this?

[Barand]

My code, that I pointed you towards earlier in this thread, does exactly that.