*TL;DR: Can you please indicate how to add fonts to use for WebKit tests on OS X? This is is needed for existing and future MathML tests (and actually pre-installing them on Mac/iOS would improve user experience).*
Dear all, In the context of the MathML refactoring [1], I've recently been reviewing test results on OS X. Unfortunately, many of existing tests or tests that will be added by the current set of MathML refactoring patches require a math font with an OpenType MATH table to work properly. This is not the case of the obsolete STIXGeneral font families that have been installed by default since OS X Lion [2]. Hence for now those tests are just skipped or have incorrect text/PNG expectations. As a comparison, the GTK port uses the Latin Modern Math font to ensure consistent results [3]. I'm attaching a simple test-fonts.html page and I'm providing the screenshots obtained when I use run-safari or run-webkit-tests with a WebKit build integrating the MathML refactoring patches. From this experiment, it seems that run-webkit-tests only use the pre-installed system fonts (STIXGeneral) but not the fonts I installed manually on my Mac. However, the latter are correctly selected with run-safari and then you can see that the rendering of math equations is much better and closer to the TeX references from the MathML torture test [4]. So my question: is there a way to ensure that WebKit tests are executed with specific fonts on OS X without polluting the WebKit repo with big math Web fonts? If the solution is to have these math fonts pre-installed on OS X, then that would also be great to enhance Safari user experience, as shown by the attached screenshots. In that case, this is probably not the business of WebKit developers but I'd like to suggest two math fonts (also reported to Apple some years ago as problems number 16841023 and 17021145): 1) STIX Math [5], which has very good coverage for unicode symbols, is supported by some tech companies, is released under SIL OFL and is the next version of the STIXGeneral font families currently pre-installed on OS X. Unfortunately the current 1.1 release has too many bugs and so is not really usable for math layout, but version 2 will solve them and is claimed to be released "soon". 2) Latin Modern Math [6], which has the Computer Modern style used by default by TeX rendering engines and is used for WebKitGTK+ tests. This font uses the LaTeX Project Public License + a Reserved Font Name clause but the authors expressed their will to release it under SIL OFL, if that can help. Thank you, Frédéric [1] https://lists.webkit.org/pipermail/webkit-dev/2015-December/027840.html [2] https://bugs.webkit.org/show_bug.cgi?id=41961 [3] https://github.com/mrobinson/webkitgtk-test-fonts [4] https://developer.mozilla.org/en-US/docs/Mozilla_MathML_Project/MathML_Torture_Test [5] http://stixfonts.org/ [6] http://www.gust.org.pl/projects/e-foundry/lm-mathTitle: Test fonts
Basic font-family test:
- monospace: A
- STIXGeneral: A
- STIX Math: A
- Latin Modern Math: A
MathML Torture test 19:
MathML Torture test 14:
Torture test 21:
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