[File] [PATCH 2/3] Parse whether a WebP file is lossless

[Emmanuel Gil Peyrot]

This is the Simple File Format (Lossless) part of the specification.

I couldn’t figure out how to parse packed 14-bit values for width and
height so I left these out for now.
---
 magic/Magdir/riff | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/magic/Magdir/riff b/magic/Magdir/riff
index ec9289c7..b86502d3 100644
--- a/magic/Magdir/riff
+++ b/magic/Magdir/riff
@@ -158,6 +158,9 @@
 >>>>>15		byte&0x80	=0x80	\b, bad color specification
 >>>>>15		byte&0x40	=0x40	\b, no clamping required
 >>>>>15		byte&0x40	=0x00	\b, decoders should clamp
+>0  string  VP8L
+>>8		byte		0x2f	\b, lossless
+>>>11		byte		&0x01	\b, with alpha
 >0  string  VP8X
 >>4		lelong		0x0a
 >>>8		byte		&0x02	\b, animated
-- 
2.44.0