Raph Levien
45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
To build:
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Check out a recent version of OTS, so that ots-read-only/ is alongside cpp/
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Cd into cpp, and run "scons".
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Then, decompress a font using ./woff2-decompress font.wof2 > font.ttf .
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An example font is provided (Inconsolata-Regular.wof2). In this snapshot,
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it contains no actual compression, but does apply the glyf table transform
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and has the file format and structure as described in the current draft
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of the "WOFF Ultra Condensed file format" doc.
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That said, it is possible to get reliable estimates, and at the very least,
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bounds, on the compression efficiency, with the confidence that the
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compression is reversible. Running the compressor and doing a whole-file
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compression with a standard entropy coder such as gzip or lzma will yield
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a file size within a few dozen bytes or so of using a single entropy coded
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stream in the final file format.
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Another limitation of the current implementation snapshot is that it
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doesn't implement continue streams. These will follow shortly.
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= Building with lzma =
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The lzma-enabled build is made with gyp instead of scons. Right now, the build
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requires patching a clean copy of OTS. (And thanks to Bashi for the patch!)
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- Download GYP from http://code.google.com/p/gyp/
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- Download clean OTS sources:
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% svn checkout http://ots.googlecode.com/svn/trunk/ ots-read-only
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- Apply patch
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% cd ots-read-only; patch -p0 < ../ots-lzma.patch
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- Run gyp to generate Makefile
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% cd ../cpp; gyp --depth=. -f make woff2.gyp
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- Build
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% make
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Now run:
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out/Default/woff2-decompress Inconsolata-Regular-lzma.wof2 > i.ttf
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We expect the build recipes to be cleaned up before the code is ready for
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production, but this should be good enough for testing.
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