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Fix exif orientation for flipped images 

fixes #13363

Links:
 * http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/
 * Example data: https://github.com/recurser/exif-orientation-examples
This commit is contained in:
Morris Jobke 2015-01-18 23:15:52 +01:00
parent aff22b3225
commit a28d3b594b
1 changed files with 12 additions and 5 deletions
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17
lib/private/image.php
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@ -358,35 +358,42 @@ class OC_Image {
$o = $this->getOrientation();
$this->logger->debug('OC_Image->fixOrientation() Orientation: ' . $o, array('app' => 'core'));
$rotate = 0;
$flip = false;
switch ($o) {
case -1:
return false; //Nothing to fix
case 1:
$rotate = 0;
break;
case 2: // Not tested
case 2:
$rotate = 0;
$flip = true;
break;
case 3:
$rotate = 180;
break;
case 4: // Not tested
case 4:
$rotate = 180;
$flip = true;
break;
case 5: // Not tested
case 5:
$rotate = 90;
$flip = true;
break;
case 6:
//$rotate = 90;
$rotate = 270;
break;
case 7: // Not tested
case 7:
$rotate = 270;
$flip = true;
break;
case 8:
$rotate = 90;
break;
}
if($flip) {
imageflip($this->resource, IMG_FLIP_HORIZONTAL);
}
if ($rotate) {
$res = imagerotate($this->resource, $rotate, 0);
if ($res) {