Try to align glyphs on their baselines after stem darkening
@@ -240,6 +240,12 @@ export abstract class TextRenderer extends Renderer {
const atlasGlyphs = this.renderContext.atlasGlyphs;
const pixelsPerUnit = this.displayPixelsPerUnit;
+ // FIXME(pcwalton): This is a hack that tries to align glyphs on their baselines after
+ // stem darkening. It's better than nothing, but we should really do better.
+ const stemDarkeningOffset = glmatrix.vec2.clone(this.stemDarkeningAmount);
+ glmatrix.vec2.scale(stemDarkeningOffset, stemDarkeningOffset, pixelsPerUnit);
+ glmatrix.vec2.scale(stemDarkeningOffset, stemDarkeningOffset, 1.0 / Math.sqrt(2.0));
+
const transforms = new Float32Array((pathCount + 1) * 4);
for (const glyph of atlasGlyphs) {
@@ -248,8 +254,8 @@ export abstract class TextRenderer extends Renderer {
transforms[pathID * 4 + 0] = pixelsPerUnit;
transforms[pathID * 4 + 1] = pixelsPerUnit;
- transforms[pathID * 4 + 2] = atlasOrigin[0];
- transforms[pathID * 4 + 3] = atlasOrigin[1];
+ transforms[pathID * 4 + 2] = atlasOrigin[0] + stemDarkeningOffset[0];
+ transforms[pathID * 4 + 3] = atlasOrigin[1] + stemDarkeningOffset[1];
}
return transforms;
