/**
* Rotated/Flip an image based on the orientation flag or a definded angle
*
* @param int|object $image
* @param string (optional) $dir, CW (clockwise)or CCW (counter clockwise), if set to false, the exif flag will be used
* @param string (optional) $flip, could be either false | V (flip vertical) | H (flip horizontal)
* @return string result code
*/
function rotate_image($image, $dir = false, $flip = false)
{
global $ngg;
if (!class_exists('ngg_Thumbnail')) {
require_once nggGallery::graphic_library();
}
if (is_numeric($image)) {
$image = nggdb::find_image($image);
}
if (!is_object($image)) {
return __('Object didn\'t contain correct data', 'nggallery');
}
if (!is_writable($image->imagePath)) {
return ' <strong>' . $image->filename . __(' is not writeable', 'nggallery') . '</strong>';
}
// if you didn't define a rotation, we look for the orientation flag in EXIF
if ($dir === false) {
$meta = new nggMeta($image->pid);
$exif = $meta->get_EXIF();
if (isset($exif['Orientation'])) {
switch ($exif['Orientation']) {
case 5:
// vertical flip + 90 rotate right
$flip = 'V';
case 6:
// 90 rotate right
$dir = 'CW';
break;
case 7:
// horizontal flip + 90 rotate right
$flip = 'H';
case 8:
// 90 rotate left
$dir = 'CCW';
break;
case 4:
// vertical flip
$flip = 'V';
break;
case 3:
// 180 rotate left
$dir = 180;
break;
case 2:
// horizontal flip
$flip = 'H';
break;
case 1:
// no action in the case it doesn't need a rotation
// no action in the case it doesn't need a rotation
default:
return '0';
break;
}
} else {
return '0';
}
}
$file = new ngg_Thumbnail($image->imagePath, TRUE);
// skip if file is not there
if (!$file->error) {
// If required save a backup copy of the file
if ($ngg->options['imgBackup'] == 1 && !file_exists($image->imagePath . '_backup')) {
@copy($image->imagePath, $image->imagePath . '_backup');
}
// before we start we import the meta data to database (required for uploads before V1.4.X)
nggAdmin::maybe_import_meta($image->pid);
if ($dir !== 0) {
$file->rotateImage($dir);
}
if ($dir === 180) {
$file->rotateImage('CCW');
}
// very special case, we rotate the image two times
if ($flip == 'H') {
$file->flipImage(true, false);
}
if ($flip == 'V') {
$file->flipImage(false, true);
}
$file->save($image->imagePath, $ngg->options['imgQuality']);
// read the new sizes
$size = @getimagesize($image->imagePath);
// add them to the database
nggdb::update_image_meta($image->pid, array('width' => $size[0], 'height' => $size[1]));
}
$file->destruct();
if (!empty($file->errmsg)) {
return ' <strong>' . $image->filename . ' (Error : ' . $file->errmsg . ')</strong>';
}
return '1';
}
