libwebp/doc/README
James Zern b6f756e82b update http links
- prefer https

- metadataworkinggroup.org/com seem to be offline; the web archive link
  was obtained from exiftool: https://exiftool.org/TagNames/MWG.html

- fix kramdown link, rubyforge has been gone a long time

- fix png/zlib links

Bug: webp:544
Bug: b/202302177
Change-Id: Id69de4553e7baf00393f12a2c1acb262443a1a93
2021-11-23 10:13:40 -08:00

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Generate libwebp Container Spec Docs from Text Source
=====================================================
HTML generation requires kramdown [1], easily installed as a
rubygem [2]. Rubygems installation should satisfy dependencies
automatically.
[1]: https://kramdown.gettalong.org/
[2]: https://rubygems.org/
HTML generation can then be done from the project root:
$ kramdown doc/webp-container-spec.txt --template doc/template.html > \
doc/output/webp-container-spec.html
kramdown can optionally syntax highlight code blocks, using CodeRay [3],
a dependency of kramdown that rubygems will install automatically. The
following will apply inline CSS styling; an external stylesheet is not
needed.
$ kramdown doc/webp-lossless-bitstream-spec.txt --template \
doc/template.html --coderay-css style --coderay-line-numbers ' ' \
--coderay-default-lang c > \
doc/output/webp-lossless-bitstream-spec.html
Optimally, use kramdown 0.13.7 or newer if syntax highlighting desired.
[3]: https://github.com/rubychan/coderay