diff options
Diffstat (limited to 'src/Text')
| -rw-r--r-- | src/Text/Pandoc/ImageSize.hs | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/Text/Pandoc/ImageSize.hs b/src/Text/Pandoc/ImageSize.hs index 00ab86eab..43d4877a0 100644 --- a/src/Text/Pandoc/ImageSize.hs +++ b/src/Text/Pandoc/ImageSize.hs @@ -410,20 +410,21 @@ jpegSize img = jfifSize :: ByteString -> Either String ImageSize jfifSize rest = - let [dpiDensity,dpix1,dpix2,dpiy1,dpiy2] = map fromIntegral - $ unpack $ B.take 5 $B.drop 9 rest - factor = case dpiDensity of - 1 -> id - 2 -> \x -> x * 254 `div` 10 - _ -> const 72 - dpix = factor (shift dpix1 8 + dpix2) - dpiy = factor (shift dpiy1 8 + dpiy2) - in case findJfifSize rest of - Left msg -> Left msg - Right (w,h) ->Right ImageSize { pxX = w + case map fromIntegral $ unpack $ B.take 5 $ B.drop 9 rest of + [dpiDensity,dpix1,dpix2,dpiy1,dpiy2] -> + let factor = case dpiDensity of + 1 -> id + 2 -> \x -> x * 254 `div` 10 + _ -> const 72 + dpix = factor (shift dpix1 8 + dpix2) + dpiy = factor (shift dpiy1 8 + dpiy2) + in case findJfifSize rest of + Left msg -> Left msg + Right (w,h) -> Right ImageSize { pxX = w , pxY = h , dpiX = dpix , dpiY = dpiy } + _ -> Left "unable to determine JFIF size" findJfifSize :: ByteString -> Either String (Integer,Integer) findJfifSize bs = |