[Webkit-unassigned] [Bug 139627] Stop returning GlyphPage from various Font functions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139627

--- Comment #4 from Antti Koivisto <koivisto at iki.fi> ---
> Changing behavior for the sake of code cleanup is probably not okay.

WebKit does not have such rule. 

> Can't
> you separate the call into two halves, and only call the second half from
> the SVG code? If you do change this behavior, you should probably add a test
> to make the intended behavior more explicit (rather than relying on updating
> a W3C test)

The test changes are progressions, the patch also fixes a bug.

There are currently no tests for non-trivial fallback behavior for probably because it is not specified. The whole thing is a super obscure corner of an obsolete spec.

I understand that the plan is to eventually start converting SVG fonts to regular fonts. I think we'll need to remove all context sensitive features to make make that happen. Seems unlikely that anyone uses them in real world.

> What was wrong with the old behavior?

It requires a pile of ugly code to support a case that probably never happens in real world.

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