Patch to rotate resized images in DokuWiki based on EXIF orientation

rotate.patch

--- a/inc/media.php	2018-12-28 17:46:14.000000000 +0100
+++ b/inc/media.php	2018-08-20 21:05:55.000000000 +0200
@@ -1084,6 +1084,15 @@
     $w = (int) $info[0];
     $h = (int) $info[1];
 
+    if ($meta) {
+        $orientation = media_getTag('Orientation', $meta);
+        if ($orientation == 3 || $orientation == 6) {
+             $tmp = $h;
+             $h = $w;
+             $w = $tmp;
+        }
+    }
+
     if($meta && ($w > $size || $h > $size)){
         $ratio = $meta->getResizeRatio($size, $size);
         $w = floor($w * $ratio);
@@ -1694,6 +1703,14 @@
 
     $w = (int) $item['meta']->getField('File.Width');
     $h = (int) $item['meta']->getField('File.Height');
+
+    $orientation = media_getTag('Orientation', $item['meta']);
+    if ($orientation == 3 || $orientation == 6) {
+        $tmp = $w;
+        $w = $h;
+        $h = $tmp;
+    }
+
     if($w>$size || $h>$size){
         if (!$fullscreen) {
             $ratio = $item['meta']->getResizeRatio($size);
@@ -2023,6 +2040,16 @@
     $info = @getimagesize($file); //get original size
     if($info == false) return $file; // that's no image - it's a spaceship!
 
+    $meta = new JpegMeta($file);
+    if ($meta) {
+        $orientation = media_getTag('Orientation', $meta);
+        if ($orientation == 3 || $orientation == 6) {
+             $tmp = $info[0];
+             $info[0] = $info[1];
+             $info[1] = $tmp;
+        }
+    }
+
     if(!$h) $h = round(($w * $info[1]) / $info[0]);
     if(!$w) $w = round(($h * $info[0]) / $info[1]);
 
@@ -2069,6 +2096,16 @@
     $info = @getimagesize($file); //get original size
     if($info == false) return $file; // that's no image - it's a spaceship!
 
+    $meta = new JpegMeta($file);
+    if ($meta) {
+        $orientation = media_getTag('Orientation', $meta);
+        if ($orientation == 3 || $orientation == 6) {
+             $tmp = $info[0];
+             $info[0] = $info[1];
+             $info[1] = $tmp;
+        }
+    }
+
     // calculate crop size
     $fr = $info[0]/$info[1];
     $tr = $w/$h;
@@ -2331,6 +2368,33 @@
     }
     if(!$image) return false;
 
+    $meta = new JpegMeta($from);
+    if ($meta) {
+        $orientation = media_getTag('Orientation', $meta);
+        
+        $degrees = 0;
+
+        if ($orientation == 7 || $orientation == 8) {
+            $degrees = 90;
+        } elseif ($orientation == 5 || $orientation == 6) {
+            $degrees = 270;
+        } elseif ($orientation == 3 || $orientation == 4) {
+            $degrees = 180;
+        }
+
+        if ($degrees) {
+            $rotate = imagerotate($image, $degrees, 0);
+            imagedestroy($image);
+
+            if (!$rotate) {
+                return false;
+            }
+
+            $image = $rotate;
+        }
+    }
+
+
     $newimg = false;
     if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
         $newimg = @imagecreatetruecolor ($to_w, $to_h);