- From: Jonathan Kew <jonathan@jfkew.plus.com>
- Date: Wed, 9 Feb 2011 14:23:37 +0000
- To: Bert Bos <bert@w3.org>
- Cc: www-font@w3.org, 3668 FONT <public-webfonts-wg@w3.org>
On 12 Jan 2011, at 15:16, Bert Bos wrote: > 5) Section 4 / section 8. I like the rigorous error handling: if the > decompressed length is not what was declared as origLength, the file > _must_ be rejected. No attempts to second-guess what the encoder > "intended" to do. > > On the other hand, it's a bit wasteful to use four bytes to store an > origLength. One bit to indicate compression would have been enough. > There is no actual need to check the length, because there is already > a checksum. The origLength for each table is stored in the WOFF file as a convenience for UAs (or other tools) that need to decompress the tables: it allows the necessary buffer space to be pre-allocated in a single operation, without needing to interpret the compressed data once just to determine the space needed and then a second time to actually decompress, or to dynamically expand the destination buffer during decompression. Please let us know if this adequately addresses your comment. Jonathan Tracker, this relates to ACTION-72: Respond to Bert Bos' Point 5. Jonathan Kew
Received on Wednesday, 9 February 2011 14:25:19 UTC