Sutton SignWriting · Engineering review · 9 September 2026

ISWA 2010 Remastered

Compare the artwork, inspect the font candidates, and record what needs correction before the source is frozen.

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Compare a symbol

Font panels align the top-left of the Line outline to make shape and size differences visible. They preserve a common physical scale; they do not show baseline placement. Original references use their historical pixels at 30 pixels per em.

Compilation overlay

Red: imported cubic sourceBlue: 2048-UPEM TrueType

This overlay preserves the imported coordinates, including bearing differences. It measures compilation changes from the existing source, not corrections to that source.

Selected symbol metrics

Compatibility evidence

Color specimen screenshots

Four fixtures from the full font: default black/white, blue/gold test palette, and Line fallback.

TrueType extent counts use conservative control-point bounds. Extending beyond the typographic line box is not itself proof of clipping. The hhea and Windows extents, browser canvas results, and application layout behavior must be considered separately.

Source references: OpenType OS/2 metrics · FreeType glyph retrieval · HarfBuzz font API

Decisions for Steve

1 · Geometry review

Identify the authority and evidence needed to approve each changed symbol. Start with the thumb family, nose/circle cases, and S3863c.

Recommendation: keep the current source as the historical baseline, then record each accepted correction with before/after images.

2 · First release formats

Recommendation: carry 2048-UPEM TTF and WOFF2 forward. Keep 1200 as a diagnostic control. Defer OTF distribution until its size and compatibility issues are resolved.

3 · Layout compatibility

Recommendation: preserve the existing top-origin / below-baseline placement for this release path. Document glyph bounds and any size changes. A new vertical model needs separate application testing.

4 · Color and Apple testing

Recommendation: keep color experimental for now. Assign a real Safari/macOS/iOS test surface before promising support. Separate Line and Fill remain the delivery foundation.

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Font artwork license