share connected arc impl (be5invis#2403)

Author: be5invis

.prettierrc.yaml

@@ -3,3 +3,10 @@ printWidth: 100
 useTabs: true
 tabWidth: 4
 arrowParens: avoid
+
+overrides:
+  - files: "package.json"
+    options:
+        parser: json
+        tabWidth: 2
+        useTabs: false

package-lock.json

@@ -13,6 +13,6 @@
     "@iosevka/geometry-cache": "30.3.1",
     "@iosevka/glyph": "30.3.1",
     "@iosevka/util": "30.3.1",
-    "typo-geom": "^0.15.1"
+    "typo-geom": "^0.16.1"
   }
 }

packages/font-glyphs/package.json

@@ -5,20 +5,20 @@ import { Transform } from "@iosevka/geometry/transform";
 
 export function finalizeGlyphs(cache, para, glyphStore) {
 	const skew = Math.tan(((para.slopeAngle || 0) / 180) * Math.PI);
-	regulateGlyphStore(cache, skew, glyphStore);
+	regulateGlyphStore(cache, para, skew, glyphStore);
 	return glyphStore;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
-function regulateGlyphStore(cache, skew, glyphStore) {
+function regulateGlyphStore(cache, para, skew, glyphStore) {
 	for (const g of glyphStore.glyphs()) {
 		if (!(g.geometry.measureComplexity() & Geom.CPLX_NON_EMPTY)) continue;
-		if (!g.geometry.toReferences()) flattenSimpleGlyph(cache, skew, g);
+		if (!g.geometry.toReferences()) flattenSimpleGlyph(cache, para, skew, g);
 	}
 }
 
-function flattenSimpleGlyph(cache, skew, g) {
+function flattenSimpleGlyph(cache, para, skew, g) {
 	try {
 		let gSimplified;
 		const needsTransform = g.gizmo ? !Transform.isTranslate(g.gizmo) : skew != 0;
@@ -38,6 +38,9 @@ function flattenSimpleGlyph(cache, skew, g) {
 		g.includeContours(cs);
 	} catch (e) {
 		console.error("Detected broken geometry when processing", g._m_identifier);
+		console.error(
+			`${para.naming.family} ${para.naming.weight} ${para.naming.width} ${para.naming.slope}`,
+		);
 		g.clearGeometry();
 	}
 }

packages/font/src/cleanup/glyphs.mjs

@@ -5,7 +5,7 @@ import zlib from "zlib";
 import * as CurveUtil from "@iosevka/geometry/curve-util";
 import { encode, decode } from "@msgpack/msgpack";
 
-const Edition = 42;
+const Edition = 43;
 const MAX_AGE = 16;
 class GfEntry {
 	constructor(age, value) {

packages/geometry-cache/src/index.mjs

@@ -15,6 +15,6 @@
   "dependencies": {
     "@iosevka/util": "30.3.1",
     "spiro": "^3.0.1",
-    "typo-geom": "^0.15.1"
+    "typo-geom": "^0.16.1"
   }
 }

packages/geometry/package.json

@@ -41,12 +41,12 @@ function convertContourToArcs(contour) {
 				const zc = z;
 				let zf = contour[(j + 1) % contour.length];
 				const zfIsCorner = zf.type === Point.Type.contour;
-				if (!zfIsCorner) zf = Point.from(Point.Type.Corner, zc).mix(0.5, zf);
+				if (!zfIsCorner) zf = Point.from(Point.Type.Corner, zc).mix(zf, 0.5);
 				newContour.push(
 					new TypoGeom.Arcs.Bez3(
 						z0,
-						Point.from(Point.Type.CubicStart, z0).mix(2 / 3, zc),
-						Point.from(Point.Type.CubicEnd, zf).mix(2 / 3, zc),
+						Point.from(Point.Type.CubicStart, z0).mix(zc, 2 / 3),
+						Point.from(Point.Type.CubicEnd, zf).mix(zc, 2 / 3),
 						Point.from(Point.Type.Corner, zf),
 					),
 				);

packages/geometry/src/curve-util.mjs

@@ -33,12 +33,8 @@ export class Point {
 	addScale(scale, z2) {
 		return new Point(this.type, this.x + scale * z2.x, this.y + scale * z2.y);
 	}
-	mix(scale, z2) {
-		return new Point(
-			this.type,
-			this.x + scale * (z2.x - this.x),
-			this.y + scale * (z2.y - this.y),
-		);
+	mix(z2, t) {
+		return new Point(this.type, mix(this.x, z2.x, t), mix(this.y, z2.y, t));
 	}
 	scale(t) {
 		return new Point(this.type, t * this.x, t * this.y);

packages/geometry/src/point.mjs

@@ -54,63 +54,21 @@ class SpiroSimplifier {
 			if (arc.arcLength > 1e-6) this.combinedArcs.push(arc);
 		} else {
 			const combined = new SpiroSequenceArc(this.m_ongoingArcs);
-			if (combined.totalLength > 1e-6) this.combinedArcs.push(combined);
+			if (!combined.isEmpty() && combined.totalLength > 1e-6) {
+				this.combinedArcs.push(combined);
+			}
 		}
 		this.m_ongoingArcs = [];
 	}
 }
 
-class SpiroSequenceArc {
+const SpiroMeasurer = {
+	measureLength(a) {
+		return a.arcLength;
+	},
+};
+class SpiroSequenceArc extends TypoGeom.Arcs.CombinedArc {
 	constructor(segments) {
-		// Filter out zero-length segments
-		let rear = 0;
-		for (let j = 0; j < segments.length; j++) {
-			if (segments[j].arcLength > 1e-6) {
-				segments[rear++] = segments[j];
-			}
-		}
-		segments.length = rear;
-
-		// Compute total length and stops
-		let totalLength = 0;
-		let stops = [];
-		for (let j = 0; j < segments.length; j++) {
-			stops[j] = totalLength;
-			totalLength += segments[j].arcLength;
-		}
-		for (let j = 0; j < segments.length; j++) {
-			stops[j] = stops[j] / totalLength;
-		}
-		this.totalLength = totalLength;
-		this.m_segments = segments;
-		this.m_stops = stops;
-	}
-
-	eval(t) {
-		const j = segTSearch(this.m_stops, t);
-		const tBefore = this.m_stops[j];
-		const tNext = j < this.m_stops.length - 1 ? this.m_stops[j + 1] : 1;
-		const tRelative = (t - tBefore) / (tNext - tBefore);
-		return this.m_segments[j].eval(tRelative);
-	}
-
-	derivative(t) {
-		const j = segTSearch(this.m_stops, t);
-		const tBefore = this.m_stops[j];
-		const tNext = j < this.m_stops.length - 1 ? this.m_stops[j + 1] : 1;
-		const tRelative = (t - tBefore) / (tNext - tBefore);
-		return Vec2.scaleFrom(1 / (tNext - tBefore), this.m_segments[j].derivative(tRelative));
-	}
-}
-
-function segTSearch(stops, t) {
-	if (t < 0) return 0;
-	let l = 0,
-		r = stops.length;
-	while (l < r) {
-		let m = (l + r) >>> 1;
-		if (stops[m] > t) r = m;
-		else l = m + 1;
+		super(SpiroMeasurer, segments);
 	}
-	return r - 1;
 }