100d40c827
* [aat] Fix implementation of AAT kerning for Geeza Pro. Despite what the comment in the code used to say, it appears that Geeza Pro does rely on accumulating kerning values from successive subtables. With this change, the results now match Core Text rendering (and avoid the clear visual breakage reported in #2358). Testcase: U+0644,U+064E,U+0645,U+064E,U+0651,U+0627 Fixes #2358. * [aat] Update test expectations, add new testcase. |
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|---|---|---|
| .. | ||
| data | ||
| texts/in-house | ||
| hb_test_tools.py | ||
| hb-diff | ||
| hb-diff-colorize | ||
| hb-diff-filter-failures | ||
| hb-diff-stat | ||
| hb-unicode-decode | ||
| hb-unicode-encode | ||
| hb-unicode-prettyname | ||
| Makefile.am | ||
| meson.build | ||
| README.md | ||
| record-test.sh | ||
| run-tests.py | ||
Adding tests
You can test shaping of a unicode sequence against a font like this:
$ ./hb-unicode-encode 41 42 43 627 | ../../util/hb-shape font.ttf
assuming an in-tree build. The 41 42 43 627 here is a sequence of
Unicode codepoints: U+0041,0042,0043,0627. When you are happy with
the shape results, you can use the record-test.sh script to add
this to the test suite. record-test.sh requires pyftsubset to
be installed. You can get pyftsubset by installing
FontTools from https://github.com/behdad/fonttools.
To use record-test.sh, just put it right before the hb-shape invocation:
$ ./hb-unicode-encode 41 42 43 627 | ./record-test.sh ../../util/hb-shape font.ttf
what this does is:
- Subset the font for the sequence of Unicode characters requested,
- Compare the
hb-shapeoutput of the original font versus the subset font for the input sequence, - If the outputs differ, perhaps it is because the font does not have
glyph names; it then compares the output of
hb-viewfor both fonts. - If the outputs differ, recording fails. Otherwise, it will move the
subset font file into
data/in-house/fontsand name it after its hash, and print out the test case input, which you can then redirect to an existing or new test file indata/in-house/testsusing-o, e.g.:
$ ./hb-unicode-encode 41 42 43 627 | ./record-test.sh -o data/in-house/tests/test-name.test ../../util/hb-shape font.ttf
If you created a new test file, add it to data/in-house/Makefile.sources
so it is run. Check that make check does indeed run it, and that the
test passes. When everything looks good, git add the new font as well
as the new test file if you created any. You can see what new files are
there by running git status data/in-house. And commit!
Note! Please only add tests using Open Source fonts, preferably under OFL or similar license.