/**
* resize an image
*
* @param string $from file to convert
* @param string $to convert to what
* @param int $width width to convert to
* @param int $height height to convert to
* @param boolean $keepratio keep image ratio, or force an exact resize
*
* @return null
*/
static function resize($from, $to, $width, $height, $keepratio = true)
{
if (!file_exists($from) && @fopen($from, 'r') != true) {
return false;
}
switch (@$GLOBALS['DBVARS']['graphics-method']) {
case 'imagick':
// {
$thumb = new Imagick();
$thumb->read($from);
$thumb->setImageOpacity(1.0);
$thumb->resizeImage($width, $height, Imagick::FILTER_LANCZOS, 1, true);
$thumb->writeImage($to);
$thumb->clear();
$thumb->destroy();
break;
// }
// }
default:
// { fallback to GD
$extFrom = CoreGraphics::getType($from);
switch (preg_replace('/.*\\./', '', $to)) {
case 'png':
// {
$extTo = 'png';
break;
// }
// }
default:
$extTo = 'jpeg';
}
$size = getimagesize($from);
if ($size === false) {
return false;
}
$load = 'imagecreatefrom' . $extFrom;
$save = 'image' . $extTo;
if (!function_exists($load) || !function_exists($save)) {
return false;
}
if (strpos($from, '/') !== 0) {
// external image
$tmp = USERBASE . '/ww.cache/' . md5($from) . '.' . $extFrom;
if (!file_exists($tmp)) {
copy($from, $tmp);
}
$im = $load($tmp);
unlink($tmp);
} else {
$im = $load($from);
}
if ($keepratio) {
$multx = $size[0] / $width;
$multy = $size[1] / $height;
if ($multx > $multy) {
$mult = $multx;
} else {
$mult = $multy;
}
$width = $size[0] / $mult;
$height = $size[1] / $mult;
}
$imresized = imagecreatetruecolor($width, $height);
imagealphablending($imresized, false);
imagecopyresampled($imresized, $im, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
imagesavealpha($imresized, true);
$save($imresized, $to, $extTo == 'jpeg' ? 100 : 9);
imagedestroy($imresized);
imagedestroy($im);
// }
}
return true;
}
