movim_ynh/sources/system/UtilsPicture.php

<?php


function createEmailPic($jid, $email) {
    $cachefile = DOCUMENT_ROOT.'/cache/'.$jid.'_email.png';

    if(file_exists(DOCUMENT_ROOT.'/cache/'.$jid.'_email.png'))
        unlink(DOCUMENT_ROOT.'/cache/'.$jid.'_email.png');

    $draw = new ImagickDraw();
    $draw->setFontSize(13);
    $draw->setGravity(Imagick::GRAVITY_CENTER);

    $canvas = new Imagick();

    $metrics = $canvas->queryFontMetrics($draw, $email);

    $canvas->newImage($metrics['textWidth'], $metrics['textHeight'], "transparent", "png");
    $canvas->annotateImage($draw, 0, 0, 0, $email);

    $canvas->setImageFormat('PNG');
    $canvas->writeImage($cachefile);
}