diff options
| -rw-r--r-- | src/Text/Pandoc/ImageSize.hs | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/Text/Pandoc/ImageSize.hs b/src/Text/Pandoc/ImageSize.hs index 11b2ecf53..ec2ee0c75 100644 --- a/src/Text/Pandoc/ImageSize.hs +++ b/src/Text/Pandoc/ImageSize.hs @@ -61,7 +61,6 @@ import Codec.Compression.Zlib (decompress) -- import Debug.Trace -- quick and dirty functions to get image sizes --- algorithms borrowed from wwwis.pl data ImageType = Png | Gif | Jpeg | Svg | Pdf | Eps | Emf | Tiff | Webp | Avif deriving Show @@ -119,9 +118,11 @@ imageType img = case B.take 4 img of "\x47\x49\x46\x38" -> return Gif "\x49\x49\x2a\x00" -> return Tiff "\x4D\x4D\x00\x2a" -> return Tiff - "\xff\xd8\xff\xe0" -> return Jpeg -- JFIF - "\xff\xd8\xff\xe1" -> return Jpeg -- Exif - "\xff\xd8\xff\xee" -> return Jpeg -- Exif see #11049 + "\xff\xd8\xff\xbd" -> return Jpeg -- JPEG without application segment -- see p.32 in https://www.w3.org/Graphics/JPEG/itu-t81.pdf (and https://gist.github.com/leommoore/f9e57ba2aa4bf197ebc5?permalink_comment_id=3863054#gistcomment-3863054) + _ | B.take 3 img == "\xff\xd8\xff" + && (let byte4 = B.take 1 (B.drop 3 img) + in byte4 >= "\xe0" && byte4 <= "\xef") -- JPEG with application segment + -> return Jpeg "%PDF" -> return Pdf "<svg" -> return Svg "<?xm" |