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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
Open

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

olt opened this issue Mar 9, 2019 · 1 comment
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@olt
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olt 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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Change https://golang.org/cl/166477 mentions this issue: font/sfnt: implement Font.GlyphMetrics

@ALTree ALTree added the NeedsDecision Feedback is required from experts, contributors, and/or the community before a change can be made. label Mar 10, 2019
olt added a commit to olt/golang-x-image that referenced this issue Mar 27, 2019
@olt
font/sfnt: implement Font.GlyphMetrics
764170f 
DO NOT SUBMIT

Discussion golang/go#30699

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

Change-Id: Iaee8b6d88afc48f21d00bf84219b99f993b3ab9a
@sbinet sbinet mentioned this issue Apr 30, 2020
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sbinet pushed a commit to go-latex/x-image that referenced this issue Jun 4, 2020
@olt @sbinet
font/sfnt: implement Font.GlyphBounds
1c53e2a 
Updates golang/go#30699

Font.GlyphBounds returns the glyph's bounding box and advance as
expected by the GlyphBounds method of the font.Face interface.

Change-Id: Iaee8b6d88afc48f21d00bf84219b99f993b3ab9a
gopherbot pushed a commit to golang/image that referenced this issue Jun 9, 2020
@olt @nigeltao
font/sfnt: implement Font.GlyphBounds
3f4726a 
Updates golang/go#30699

Font.GlyphBounds returns the glyph's bounding box and advance as
expected by the GlyphBounds method of the font.Face interface.

Change-Id: Iaee8b6d88afc48f21d00bf84219b99f993b3ab9a
Reviewed-on: https://go-review.googlesource.com/c/image/+/166477
Reviewed-by: Nigel Tao <nigeltao@golang.org>
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