From: Mischa POSLAWSKY <perl@shiar.org>
Date: Mon, 16 Nov 2020 23:23:20 +0000 (+0100)
Subject: thumb: apply exif orientation
X-Git-Tag: v4.5~19
X-Git-Url: http://git.shiar.net/minimedit.git/commitdiff_plain/34ab86865e39ec1a2e50878f453722d8ea19a6d6

thumb: apply exif orientation

Match expected results (and modern browser rendering of originals)
for common rotation on phone submissions.

May not match photoswipe rendering, which depends on browser support.
Best to apply rotation without tags for now (exifautotran).
---

diff --git a/thumb/index.php b/thumb/index.php
index d296fbf..6381259 100644
--- a/thumb/index.php
+++ b/thumb/index.php
@@ -90,6 +90,7 @@ function mkthumb_exec($source, $target, $width, $height)
 		'-delete', '1--1', # static
 		'-trim',
 		'-background', 'white', '-layers', 'flatten', # opaque
+		'-auto-orient', # apply exif rotation
 		'-interlace', 'plane', # progressive
 		'-strip', '-taint', # omit metadata
 		'-sampling-factor', '4:2:0', '-colorspace', 'sRGB', # half chroma