/**
* nggAdmin::createThumbnail() - function to create or recreate a thumbnail
*
* @param object | int $image contain all information about the image or the id
* @return string result code
* @since v1.0.0
*/
function create_thumbnail($image)
{
global $ngg;
if (!class_exists('ngg_Thumbnail')) {
require_once nggGallery::graphic_library();
}
if (is_numeric($image)) {
$image = nggdb::find_image($image);
}
if (!is_object($image)) {
return __('Object didn\'t contain correct data', 'nggallery');
}
// check for existing thumbnail
if (file_exists($image->thumbPath)) {
if (!is_writable($image->thumbPath)) {
return $image->filename . __(' is not writeable ', 'nggallery');
}
}
$thumb = new ngg_Thumbnail($image->imagePath, TRUE);
// skip if file is not there
if (!$thumb->error) {
if ($ngg->options['thumbcrop']) {
// THX to Kees de Bruin, better thumbnails if portrait format
$width = $ngg->options['thumbwidth'];
$height = $ngg->options['thumbheight'];
$curwidth = $thumb->currentDimensions['width'];
$curheight = $thumb->currentDimensions['height'];
if ($curwidth > $curheight) {
$aspect = 100 * $curwidth / $curheight;
} else {
$aspect = 100 * $curheight / $curwidth;
}
$width = round($width * $aspect / 100);
$height = round($height * $aspect / 100);
$thumb->resize($width, $height);
$thumb->cropFromCenter($width);
} elseif ($ngg->options['thumbfix']) {
// check for portrait format
if ($thumb->currentDimensions['height'] > $thumb->currentDimensions['width']) {
$thumb->resize($ngg->options['thumbwidth'], 0);
// get optimal y startpos
$ypos = ($thumb->currentDimensions['height'] - $ngg->options['thumbheight']) / 2;
$thumb->crop(0, $ypos, $ngg->options['thumbwidth'], $ngg->options['thumbheight']);
} else {
$thumb->resize(0, $ngg->options['thumbheight']);
// get optimal x startpos
$xpos = ($thumb->currentDimensions['width'] - $ngg->options['thumbwidth']) / 2;
$thumb->crop($xpos, 0, $ngg->options['thumbwidth'], $ngg->options['thumbheight']);
}
} else {
$thumb->resize($ngg->options['thumbwidth'], $ngg->options['thumbheight']);
}
// save the new thumbnail
$thumb->save($image->thumbPath, $ngg->options['thumbquality']);
nggAdmin::chmod($image->thumbPath);
}
$thumb->destruct();
if (!empty($thumb->errmsg)) {
return ' <strong>' . $image->filename . ' (Error : ' . $thumb->errmsg . ')</strong>';
}
// success
return '1';
}