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[Bari-ye] Collision rects and Multi-anchor attachment #6

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be5invis opened this issue Mar 1, 2019 · 1 comment
Open

[Bari-ye] Collision rects and Multi-anchor attachment #6

be5invis opened this issue Mar 1, 2019 · 1 comment

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@be5invis
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be5invis commented Mar 1, 2019 •
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Very rough thoughts, basic idea:

  • Glyphs can define various rects, and also corresponding "collision group" (an uint16_t).
  • A multi-anchor attachment lookup will define a series of anchors, and when performing attachment, the shaper would find the first anchor that the rects sharing same collision group in the mark and the bases (or base-marks. The glyphs that should be considered as "bases" are selected using a mask, pretty like the flags in the lookup flags) won't collide.

DISCLAIMER: This is NOT a proposal from Microsoft, just from me.
@tiroj
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tiroj commented Mar 1, 2019

cf. Page 39 of my 2014 TypeCon presentation on Problems of Adjacency

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@be5invis @tiroj