Emulate -auto-rotate option from ImageMagick

1 files changed, 13 insertions, 0 deletions

diff --git a/it.class b/it.class
index d18ca4f..262b295 100644
--- a/it.class
+++ b/it.class
@@ -546,6 +546,19 @@ static function imageconvert($p)
 			list(, $type) = explode(' ', strtolower(it::exec('identify 2>/dev/null {in}', $p))); # for things like eps
 	}
 
+	# emulate -auto-orient which is not supported by GM
+	if ($p['-opts']['-auto-orient']) {
+		$exif = @exif_read_data($p['in'], 'IFD0');
+		switch ($exif['Orientation']) {
+		case 2: $p['-opts']['-flop'] = true;  break;
+		case 3: $p['-opts']['-rotate'] = 180; break;
+		case 4: $p['-opts']['-flip'] = true;  break;
+		case 6: $p['-opts']['-rotate'] = 90;  break;
+		case 8: $p['-opts']['-rotate'] = 270; break;
+		}
+		unset($p['-opts']['-auto-orient']);
+	}
+
 	$type = strtr($type, array("jpeg" => "jpg", "tiff" => "tif", "ps" => "eps", "ept" => "eps"));
 	$p += array('type' => $type, 'types' => "bmp,eps,gif,jp2,jpg,png,svg,tif");
 	$p['-opts'] = array('-thumbnail' => $p['size']) + (array)$p['-opts'];