fix(canvas): render Figma text decoration styles

packages/core/src/canvas/text.ts

@@ -195,6 +195,31 @@ function textDecorationValue(ck: CanvasKit, decoration: string): number {
   }
 }
 
+export function textDecorationStyleValue<T>(
+  ck: { DecorationStyle: { Solid: T; Dotted: T; Wavy: T } },
+  style: SceneNode['textDecorationStyle'] | undefined
+): T {
+  switch (style) {
+    case 'DOTTED':
+      return ck.DecorationStyle.Dotted
+    case 'WAVY':
+      return ck.DecorationStyle.Wavy
+    default:
+      return ck.DecorationStyle.Solid
+  }
+}
+
+function textDecorationColor(
+  ck: CanvasKit,
+  fills: SceneNode['textDecorationFills'] | undefined,
+  fallback: Float32Array
+): Float32Array {
+  const fill = fills?.find((item) => item.visible && item.type === 'SOLID')
+  if (!fill) return fallback
+  const color = resolveRGBAForPreview(fill.color).color
+  return ck.Color4f(color.r, color.g, color.b, color.a * fill.opacity)
+}
+
 function styleRunColor(
   ck: CanvasKit,
   style: SceneNode['styleRuns'][number]['style'],
@@ -238,6 +263,17 @@ function pushStyleRun(
       fontFeatures: textFontFeatures(style.fontFeatures ?? node.fontFeatures),
       letterSpacing: style.letterSpacing ?? (node.letterSpacing || 0),
       decoration: textDecorationValue(ck, style.textDecoration ?? node.textDecoration),
+      decorationStyle: textDecorationStyleValue(
+        ck,
+        style.textDecorationStyle ?? node.textDecorationStyle
+      ),
+      decorationThickness:
+        style.textDecorationThickness ?? node.textDecorationThickness ?? undefined,
+      decorationColor: textDecorationColor(
+        ck,
+        style.textDecorationFills ?? node.textDecorationFills,
+        baseColor
+      ),
       heightMultiplier: runLineHeight ? runLineHeight / runFontSize : undefined,
       halfLeading
     })
@@ -310,6 +346,9 @@ export function buildParagraph(
       fontFeatures: textFontFeatures(node.fontFeatures),
       letterSpacing: node.letterSpacing || 0,
       decoration: textDecorationValue(ck, node.textDecoration),
+      decorationStyle: textDecorationStyleValue(ck, node.textDecorationStyle),
+      decorationThickness: node.textDecorationThickness ?? undefined,
+      decorationColor: textDecorationColor(ck, node.textDecorationFills, baseColor),
       heightMultiplier: node.lineHeight ? node.lineHeight / baseFontSize : undefined,
       halfLeading
     }

packages/core/src/kiwi/fig/node-change/convert.ts

@@ -275,10 +275,7 @@ function importedTextLineHeight(nc: NodeChange): number | null {
   return convertLineHeight(nc.lineHeight, nc.fontSize)
 }
 
-function convertTextProps(
-  nc: NodeChange,
-  blobs: Uint8Array[]
-): Pick<
+type TextProps = Pick<
   SceneNode,
   | 'text'
   | 'fontSize'
@@ -290,6 +287,9 @@ function convertTextProps(
   | 'textAutoResize'
   | 'textCase'
   | 'textDecoration'
+  | 'textDecorationStyle'
+  | 'textDecorationThickness'
+  | 'textDecorationFills'
   | 'lineHeight'
   | 'letterSpacing'
   | 'maxLines'
@@ -300,7 +300,23 @@ function convertTextProps(
   | 'textDirection'
   | 'figmaDerivedLayout'
   | 'figmaDerivedTextGlyphs'
+>
+
+function convertTextDecorationProps(
+  nc: NodeChange
+): Pick<
+  SceneNode,
+  'textDecoration' | 'textDecorationStyle' | 'textDecorationThickness' | 'textDecorationFills'
 > {
+  return {
+    textDecoration: mapTextDecoration(nc.textDecoration as string),
+    textDecorationStyle: (nc.textDecorationStyle ?? 'SOLID') as SceneNode['textDecorationStyle'],
+    textDecorationThickness: nc.textDecorationThickness?.value ?? null,
+    textDecorationFills: convertFills(nc.textDecorationFillPaints)
+  }
+}
+
+function convertTextProps(nc: NodeChange, blobs: Uint8Array[]): TextProps {
   return {
     text: nc.textData?.characters ?? '',
     fontSize: nc.fontSize ?? 14,
@@ -315,7 +331,7 @@ function convertTextProps(
     textAlignVertical: (nc.textAlignVertical ?? 'TOP') as TextAlignVertical,
     textAutoResize: (nc.textAutoResize ?? 'NONE') as TextAutoResize,
     textCase: (nc.textCase ?? 'ORIGINAL') as TextCase,
-    textDecoration: mapTextDecoration(nc.textDecoration as string),
+    ...convertTextDecorationProps(nc),
     lineHeight: importedTextLineHeight(nc),
     letterSpacing: convertLetterSpacing(nc.letterSpacing, nc.fontSize),
     maxLines: (nc.maxLines ?? null) as number | null,

packages/core/src/kiwi/fig/node-change/serialize.ts

@@ -317,6 +317,13 @@ function serializeTextProps(
   if (node.textDecoration !== 'NONE') {
     nc.textDecoration = node.textDecoration === 'UNDERLINE' ? 'UNDERLINE' : 'STRIKETHROUGH'
   }
+  if (node.textDecorationStyle !== 'SOLID') nc.textDecorationStyle = node.textDecorationStyle
+  if (node.textDecorationThickness != null) {
+    nc.textDecorationThickness = { value: node.textDecorationThickness, units: 'PIXELS' }
+  }
+  if (node.textDecorationFills.length > 0) {
+    nc.textDecorationFillPaints = node.textDecorationFills.map(fillToKiwiPaint)
+  }
 }
 
 function normalizeStackMode(value: string | undefined): KiwiNodeChange['stackMode'] {

packages/core/src/kiwi/fig/node-change/style-runs.ts

@@ -34,6 +34,15 @@ function convertStyleOverride(
   }
   const deco = override.textDecoration
   if (deco) style.textDecoration = mapTextDecoration(deco)
+  if (override.textDecorationStyle)
+    style.textDecorationStyle =
+      override.textDecorationStyle as CharacterStyleOverride['textDecorationStyle']
+  if (override.textDecorationThickness)
+    style.textDecorationThickness = override.textDecorationThickness.value ?? null
+  if (override.textDecorationFillPaints) {
+    const decorationFills = convertFills(override.textDecorationFillPaints)
+    if (decorationFills.length > 0) style.textDecorationFills = decorationFills
+  }
   if (override.fillPaints) {
     const fills = convertFills(override.fillPaints)
     if (fills.length > 0) style.fills = fills

packages/core/src/kiwi/fig/node-change/text-data-export.ts

@@ -40,6 +40,13 @@ function textStyleOverrideToKiwi(
     override.lineHeight = { value: style.lineHeight, units: 'PIXELS' }
   }
   if (style.textDecoration) override.textDecoration = style.textDecoration
+  if (style.textDecorationStyle) override.textDecorationStyle = style.textDecorationStyle
+  if (style.textDecorationThickness != null) {
+    override.textDecorationThickness = { value: style.textDecorationThickness, units: 'PIXELS' }
+  }
+  if (style.textDecorationFills && style.textDecorationFills.length > 0) {
+    override.textDecorationFillPaints = style.textDecorationFills.map(fillToKiwiPaint)
+  }
   if (style.fills && style.fills.length > 0) {
     override.fillPaints = style.fills.map(fillToKiwiPaint)
   }

packages/core/src/scene-graph/copy.ts

@@ -42,6 +42,9 @@ export function copyStyleRun(r: StyleRun): StyleRun {
     style: {
       ...r.style,
       fills: r.style.fills ? r.style.fills.map(copyFill) : undefined,
+      textDecorationFills: r.style.textDecorationFills
+        ? r.style.textDecorationFills.map(copyFill)
+        : undefined,
       fontVariations: r.style.fontVariations
         ? r.style.fontVariations.map((v) => ({ ...v }))
         : undefined,

packages/core/src/scene-graph/node-defaults.ts

@@ -84,6 +84,9 @@ export function createDefaultNode(
     textAutoResize: 'NONE',
     textCase: 'ORIGINAL',
     textDecoration: 'NONE',
+    textDecorationStyle: 'SOLID',
+    textDecorationThickness: null,
+    textDecorationFills: [],
     maxLines: null,
     styleRuns: [],
     fontVariations: [],

packages/core/src/scene-graph/source-metadata.ts

@@ -28,6 +28,9 @@ const RAW_NODE_FIELD_KEYS = new Set([
   'textAutoResize',
   'textCase',
   'textDecoration',
+  'textDecorationStyle',
+  'textDecorationThickness',
+  'textDecorationFills',
   'lineHeight',
   'letterSpacing',
   'maxLines',

packages/core/src/scene-graph/types.ts

@@ -187,6 +187,7 @@ export type TextAutoResize = 'NONE' | 'HEIGHT' | 'WIDTH_AND_HEIGHT' | 'TRUNCATE'
 export type TextAlignVertical = 'TOP' | 'CENTER' | 'BOTTOM'
 export type TextCase = 'ORIGINAL' | 'UPPER' | 'LOWER' | 'TITLE'
 export type TextDecoration = 'NONE' | 'UNDERLINE' | 'STRIKETHROUGH'
+export type TextDecorationStyle = 'SOLID' | 'DOTTED' | 'WAVY'
 export type TextDirection = 'AUTO' | 'LTR' | 'RTL'
 export type LayoutDirection = 'AUTO' | 'LTR' | 'RTL'
 
@@ -204,6 +205,9 @@ export interface CharacterStyleOverride {
   fontWeight?: number
   italic?: boolean
   textDecoration?: TextDecoration
+  textDecorationStyle?: TextDecorationStyle
+  textDecorationThickness?: number | null
+  textDecorationFills?: Fill[]
   fontSize?: number
   fontFamily?: string
   letterSpacing?: number
@@ -350,6 +354,9 @@ export interface SceneNode {
   textAutoResize: TextAutoResize
   textCase: TextCase
   textDecoration: TextDecoration
+  textDecorationStyle: TextDecorationStyle
+  textDecorationThickness: number | null
+  textDecorationFills: Fill[]
   lineHeight: number | null
   letterSpacing: number
   maxLines: number | null

packages/docs/development/roadmap.md

@@ -150,7 +150,7 @@ Figma's design documentation groups features into these areas:
 | Reverse z-index / align-content | ✅ | ◐ | — | ✅ | ✅ | Modeled and exported; UI is limited. |
 | Constraints | ✅ | ◐ | — | ✅ | ✅ | Tools/API expose constraints; main UI is limited. |
 | Layout grids / guides | ↩ | — | — | ↩ | — | `styleIdForGrid` and `guides` are preserved only. |
-| Text styles | ↩ | ◐ | — | ↩ | — | Style IDs round-trip; no style management UI. Rich schema metadata such as derived text data, leading trim, decoration style, and semantic font style/weight is preserved for round-trip. |
+| Text styles | ↩ | ◐ | — | ↩ | — | Style IDs round-trip; no style management UI. Rich schema metadata such as derived text data, leading trim, decoration style/thickness/fill, and semantic font style/weight is preserved for round-trip. |
 | Rich style runs | ✅ | ✅ | ◐ | ✅ | ✅ | Import/render/export support; editing mixed runs is partial. |
 | Text auto resize | ✅ | ✅ | ◐ | ✅ | ✅ | Used by renderer/layout; UI does not expose every mode. |
 | Text truncation / max lines | ✅ | ✅ | — | ✅ | ✅ | Renderer supports ending truncation; no inspector control. |
@@ -195,7 +195,7 @@ OpenPencil deliberately preserves many Figma/Kiwi fields even when they are not
 | Version/sort/publish/library metadata | ↩ | — | ◐ | Assets UI shows a subset; publish/update workflow is missing. |
 | Variable and parameter consumption maps | ✅ | ◐ | ◐ | Filtered/preserved for safe round-trip; normalized bindings cover common cases. |
 | Page fields: background, page type, guides | ↩ | ◐ | — | Background/page type/guides mostly round-trip. Guides are not rendered/editable. |
-| Text internals: `textData`, layout versions, font version, derived data | ✅ | ✅ | — | Important for text fidelity; most internals are not editable. Imported derived text data, leading trim, decoration style, underline decoration paint/offset/thickness, semantic font metadata, and raw OpenType feature toggles are preserved for round-trip when safe. |
+| Text internals: `textData`, layout versions, font version, derived data | ✅ | ✅ | — | Important for text fidelity; most internals are not editable. Imported derived text data, leading trim, decoration style, underline decoration paint/offset/thickness, semantic font metadata, and raw OpenType feature toggles are preserved for round-trip when safe; decoration style/thickness/color now render through CanvasKit.
 | `fontVariations` | ✅ | ✅ | — | Variable font axes are imported, rendered, and exported for text nodes and style runs. |
 | Raw paint/effect/vector/geometry payloads | ✅ | ✅ | ◐ | Converted fields render; raw payloads preserve Figma import/export details, including mask, background paint, layout grid, export setting, and prototype interaction metadata where safe. |
 

tests/engine/io/fig/export/font-variations.test.ts

@@ -10,6 +10,18 @@ describe('Figma font variation export', () => {
     const text = graph.createNode('TEXT', page.id, {
       text: 'Axis',
       fontVariations: [{ axis: 'wght', value: 650 }],
+      textDecoration: 'UNDERLINE',
+      textDecorationStyle: 'WAVY',
+      textDecorationThickness: 1.5,
+      textDecorationFills: [
+        {
+          type: 'SOLID',
+          color: { r: 1, g: 0, b: 0, a: 1 },
+          opacity: 1,
+          visible: true,
+          blendMode: 'NORMAL'
+        }
+      ],
       fontFeatures: [
         { tag: 'LIGA', enabled: false },
         { tag: 'DLIG', enabled: true },
@@ -24,7 +36,10 @@ describe('Figma font variation export', () => {
             fontFeatures: [
               { tag: 'CALT', enabled: false },
               { tag: 'SS01', enabled: true }
-            ]
+            ],
+            textDecoration: 'UNDERLINE',
+            textDecorationStyle: 'DOTTED',
+            textDecorationThickness: 2
           }
         }
       ]
@@ -36,6 +51,9 @@ describe('Figma font variation export', () => {
     expect(nodeChange.fontVariations).toEqual([
       { axisTag: 0x77676874, axisName: 'wght', value: 650 }
     ])
+    expect(nodeChange.textDecorationStyle).toBe('WAVY')
+    expect(nodeChange.textDecorationThickness).toEqual({ value: 1.5, units: 'PIXELS' })
+    expect(nodeChange.textDecorationFillPaints?.[0]?.type).toBe('SOLID')
     expect(nodeChange.fontVariantCommonLigatures).toBe(false)
     expect(nodeChange.fontVariantContextualLigatures).toBe(true)
     expect(nodeChange.toggledOnOTFeatures).toEqual(['DLIG'])
@@ -45,5 +63,10 @@ describe('Figma font variation export', () => {
     ])
     expect(nodeChange.textData?.styleOverrideTable?.[0]?.fontVariantContextualLigatures).toBe(false)
     expect(nodeChange.textData?.styleOverrideTable?.[0]?.toggledOnOTFeatures).toEqual(['SS01'])
+    expect(nodeChange.textData?.styleOverrideTable?.[0]?.textDecorationStyle).toBe('DOTTED')
+    expect(nodeChange.textData?.styleOverrideTable?.[0]?.textDecorationThickness).toEqual({
+      value: 2,
+      units: 'PIXELS'
+    })
   })
 })

tests/engine/io/fig/import/font-variations.test.ts

@@ -44,6 +44,29 @@ describe('Figma font variation import', () => {
     ])
   })
 
+  test('imports text decoration style metadata', () => {
+    const props = nodeChangeToProps(
+      {
+        type: 'TEXT',
+        textData: { characters: 'Decorated' },
+        textDecoration: 'UNDERLINE',
+        textDecorationStyle: 'WAVY',
+        textDecorationThickness: { value: 1.5, units: 'PIXELS' },
+        textDecorationFillPaints: [
+          { type: 'SOLID', color: { r: 1, g: 0, b: 0, a: 1 }, opacity: 0.75 }
+        ]
+      } as NodeChange,
+      []
+    )
+
+    expect(props).toMatchObject({
+      textDecoration: 'UNDERLINE',
+      textDecorationStyle: 'WAVY',
+      textDecorationThickness: 1.5,
+      textDecorationFills: [{ type: 'SOLID', color: { r: 1, g: 0, b: 0, a: 1 }, opacity: 0.75 }]
+    })
+  })
+
   test('imports styled-run variable font axes and OpenType feature toggles', () => {
     const runs = importStyleRuns({
       type: 'TEXT',
@@ -56,7 +79,10 @@ describe('Figma font variation import', () => {
             styleID: 1,
             fontVariations: [{ axisName: 'GRAD', value: -50 }],
             fontVariantCommonLigatures: false,
-            toggledOnOTFeatures: ['SS01']
+            toggledOnOTFeatures: ['SS01'],
+            textDecoration: 'UNDERLINE',
+            textDecorationStyle: 'DOTTED',
+            textDecorationThickness: { value: 2, units: 'PIXELS' }
           } as NodeChange
         ]
       }
@@ -71,7 +97,10 @@ describe('Figma font variation import', () => {
           fontFeatures: [
             { tag: 'LIGA', enabled: false },
             { tag: 'SS01', enabled: true }
-          ]
+          ],
+          textDecoration: 'UNDERLINE',
+          textDecorationStyle: 'DOTTED',
+          textDecorationThickness: 2
         }
       }
     ])

tests/engine/render/canvas/text-font-variations.test.ts

@@ -1,8 +1,23 @@
 import { describe, expect, test } from 'bun:test'
 
-import { textFontFeatures, textFontVariations } from '#core/canvas/text'
+import { textDecorationStyleValue, textFontFeatures, textFontVariations } from '#core/canvas/text'
 
 describe('canvas text font variations', () => {
+  test('maps imported text decoration styles to CanvasKit', () => {
+    const ck = {
+      DecorationStyle: {
+        Solid: 'solid',
+        Dotted: 'dotted',
+        Wavy: 'wavy'
+      }
+    }
+
+    expect(textDecorationStyleValue(ck, 'SOLID')).toBe('solid')
+    expect(textDecorationStyleValue(ck, 'DOTTED')).toBe('dotted')
+    expect(textDecorationStyleValue(ck, 'WAVY')).toBe('wavy')
+    expect(textDecorationStyleValue(ck, undefined)).toBe('solid')
+  })
+
   test('passes imported variable font axes to CanvasKit text styles', () => {
     expect(
       textFontVariations([