/**
* generate a thumbnail
* @param str $sub_path upload path
* @param str $file filename
* @param str $out_file outfile name, can be null if show is true
* @param int $w desired width
* @param int $h desired max height, optional, will limit height and adjust width accordingly
* @param int $quality quality of image jpg and png
* @param bool $show output to browser if true
* @param str $output_format optional output format, if not determining from out_file can be excusivly set (1|'GIF', 2|'JPG,'' 3|'PNG')
* @param boolean $upscale true, allows image to scale up/zoom to fit thumbnail
* @return bool success
*/
function generate_thumbnail($file, $sub_path = '', $out_file = null, $w = null, $h = null, $crop = null, $quality = null, $show = false, $output_format = null, $upscale = false)
{
//gd check, do nothing if no gd
$php_modules = get_loaded_extensions();
if (!in_arrayi('gd', $php_modules)) {
return false;
}
$sub_path = tsl($sub_path);
$upload_folder = GSDATAUPLOADPATH . $sub_path;
$thumb_folder = GSTHUMBNAILPATH . $sub_path;
$thumb_file = isset($out_file) && !empty($out_file) ? $thumb_folder . $out_file : '';
create_dir($thumb_folder);
require_once 'imagemanipulation.php';
$objImage = new ImageManipulation($upload_folder . $file);
if ($objImage->imageok) {
if ($upscale) {
$objImage->setUpscale();
}
// allow magnification
if ($quality) {
$objImage->setQuality($quality);
}
// set quality for jpg or png
if (isset($output_format)) {
$objImage->setOutputFormat($output_format);
}
// setoutput format, ignored if out_file specifies extension
if (isset($w) && isset($h)) {
$objImage->setImageWidth($w, $h);
} elseif (isset($w)) {
$objImage->setImageWidth($w);
// if only specifiying width, scale to width only
// $objImage->resize($w); // constrains both dimensions to $size, same as setImageWidth($w,$w);
} elseif (isset($h)) {
$objImage->setImageHeight($h);
// if only specifiying width, scale to width only
}
if (isset($crop)) {
$objImage->setAutoCrop($crop);
}
// die(print_r($objImage));
$objImage->save($thumb_file, $show);
return $objImage;
} else {
return false;
}
}
