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x/image/font/sfnt: read more glyph metrics #30699

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olt opened this issue Mar 9, 2019 · 1 comment

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@olt
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commented Mar 9, 2019

Aligning text (left/right) requires access to more glyph metrics then AdvanceX. The side bearings (LSB/RSB) are required to know how much "whitespace" there is left/right of a glyph.

I'd like to propose a GlyphMetrics method which calculates and returns the LSB, RSB, Width and AdvanceX.

CL with working prototype is on its way.

@gopherbot gopherbot added this to the Unreleased milestone Mar 9, 2019

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commented Mar 9, 2019

Change https://golang.org/cl/166477 mentions this issue: font/sfnt: implement Font.GlyphMetrics

olt added a commit to olt/golang-x-image that referenced this issue Mar 27, 2019
font/sfnt: implement Font.GlyphMetrics
DO NOT SUBMIT

Discussion golang/go#30699

Make more glyph metrics like side bearings available with new
Font.GlyphMetric method.

Change-Id: Iaee8b6d88afc48f21d00bf84219b99f993b3ab9a
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