blFontGetTextMetrics() & blFontGetGlyphBounds() fails with OTF/CFF fonts

[KMojek]

I happened to have a handful of OTF fonts installed. I seem to get the same behavior with all of them: in the Glyph Buffer sample, the call to font.getTextMetrics() results in an empty bounding box and returns an error originating from within the BL_PROPAGATE( blFontGetGlyphBounds() ) in blFontGetTextMetrics(). It does seem to render the font though. Attaching one of the fonts.
font.zip

[kobalicek]

Unfortunately I can confirm this. The reason this fails is that OTF fonts have no bounds stored in the font, the outlines have to be inspected in order to get bounds. I will definitely try to finish this.

[kobalicek]

I have added an initial implementation for OTF/CFF fonts, however, it's uncached for now and thus slow. Let me know whether this works for you:

Commit: 44a1872

[KMojek]

Thanks, this should work! I'm having trouble building from git for some reason (probably I'm doing something stupid; beta7 and beta 8 zips worked just fine). I just wanted to verify that more complete OTF font support is on the roadmap. It sounds like it is, and that's great! For my purposes, I don't think I need much beyond what's in the sample code other than right-to-left text working; guessing that's probably part of 'Advanced Text Layout' on the roadmap.

[kobalicek]

TODO Items related to this issue:

• Implement caching of metrics in CFF case.