Khaled Hosny
de2cabb897
Per the spec[1], the bounding box should be calculated and if it differs from the one stored on the font, the original should be written otherwise it should be omitted. On the other hand, the bounding box of composite glyphs should be always written. Fixes #12. 1. http://dev.w3.org/webfonts/WOFF2/spec/#conform-mustCalculateOmitBBoxValues
This is a README for the font compression reference code. There are several compression related modules in this repository.
brotli/ contains reference code for the Brotli byte-level compression algorithm. Note that it is licensed under an Apache 2 license.
src/ contains the C++ code for compressing and decompressing fonts.
Build & Run
This document documents how to run the compression reference code. At this writing, the code, while it is intended to produce a bytestream that can be reconstructed into a working font, the reference decompression code is not done, and the exact format of that bytestream is subject to change.
The build process depends on the g++ compiler.
Build
On a standard Unix-style environment:
git clone https://github.com/google/woff2.git
cd woff2
git submodule init
git submodule update
make clean all
Run
Ensure the binaries from the build process are in your $PATH, then:
woff2_compress myfont.ttf
woff2_decompress myfont.woff2
References
http://www.w3.org/TR/WOFF2/ http://www.w3.org/Submission/MTX/
Also please refer to documents (currently Google Docs):
WOFF Ultra Condensed file format: proposals and discussion of wire format issues (PDF is in docs/ directory)
WIFF Ultra Condensed: more discussion of results and compression techniques. This tool was used to prepare the data in that document.