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I think sdfPx=8 means that if you are 1px from the edge in the sdf then the distance value for that point is 8 A distance of 20 is 2.5 pixels from the edge |
tristen
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Aug 5, 2019
Pull what's applicable from #97 into this commit.
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Closing this! progress continues in #160 |
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Rewrites the proto spec to include both font face metadata and SDF generation metadata, and drops the "fontstack" concept from the proto spec. Although a font file can contain multiple faces, I'm undecided on whether the proto spec should still permit multiple faces.
Refs #51, mapbox/mapbox-gl-js#154, #80 (comment)
@ansis I still can't quite figure out where the magic
sdfPxvalue in mapbox-gl-js is originating from, please tag a commit on here if you can find it in the SDF generation code. IssdfPxused to calculate distance units per pixel and shift as mentioned in #51 or are those other constants I can't find?