1 files changed, 148 insertions, 0 deletions
diff --git a/apps/web/src/masks/builtin/definitions/heart.ts b/apps/web/src/masks/builtin/definitions/heart.ts
new file mode 100644
index 00000000..d1af5eb2
--- /dev/null
+++ b/apps/web/src/masks/builtin/definitions/heart.ts
@@ -0,0 +1,148 @@
+import type { MaskDefinition } from "@/masks/types";
+import {
+	BOX_LIKE_MASK_PARAMS,
+	buildBoxMaskInteraction,
+	computeBoxMaskParamUpdate,
+	getBoxLikeGeometry,
+	getDefaultSquareMaskParams,
+	getStrokeOffset,
+	rotatePoint,
+} from "../box-like";
+
+function buildHeartPath({
+	centerX,
+	centerY,
+	halfWidth,
+	halfHeight,
+	rotationRad,
+}: {
+	centerX: number;
+	centerY: number;
+	halfWidth: number;
+	halfHeight: number;
+	rotationRad: number;
+}): Path2D {
+	const toPoint = ({
+		localX,
+		localY,
+	}: {
+		localX: number;
+		localY: number;
+	}) =>
+		rotatePoint({
+			x: centerX + localX,
+			y: centerY + localY,
+			centerX,
+			centerY,
+			rotationRad,
+		});
+
+	const start = toPoint({ localX: 0, localY: -halfHeight * 0.475 });
+	const rightControl1 = toPoint({
+		localX: halfWidth,
+		localY: -halfHeight * 1.225,
+	});
+	const rightControl2 = toPoint({
+		localX: halfWidth,
+		localY: -halfHeight * 0.125,
+	});
+	const bottom = toPoint({ localX: 0, localY: halfHeight * 0.725 });
+	const leftControl1 = toPoint({
+		localX: -halfWidth,
+		localY: -halfHeight * 0.125,
+	});
+	const leftControl2 = toPoint({
+		localX: -halfWidth,
+		localY: -halfHeight * 1.225,
+	});
+
+	const path = new Path2D();
+	path.moveTo(start.x, start.y);
+	path.bezierCurveTo(
+		rightControl1.x,
+		rightControl1.y,
+		rightControl2.x,
+		rightControl2.y,
+		bottom.x,
+		bottom.y,
+	);
+	path.bezierCurveTo(
+		leftControl1.x,
+		leftControl1.y,
+		leftControl2.x,
+		leftControl2.y,
+		start.x,
+		start.y,
+	);
+	path.closePath();
+	return path;
+}
+
+export const heartMaskDefinition: MaskDefinition<"heart"> = {
+	type: "heart",
+	name: "Heart",
+	features: {
+		hasPosition: true,
+		hasRotation: true,
+		sizeMode: "width-height",
+	},
+	params: BOX_LIKE_MASK_PARAMS,
+	interaction: buildBoxMaskInteraction({
+		sizeMode: "width-height",
+		buildOverlayPath({ width, height }) {
+			const cx = width / 2;
+			const cy = height / 2;
+			const halfWidth = width / 2;
+			const halfHeight = height / 2;
+			return [
+				`M ${cx},${cy - halfHeight * 0.475}`,
+				`C ${cx + halfWidth},${cy - halfHeight * 1.225} ${cx + halfWidth},${cy - halfHeight * 0.125} ${cx},${cy + halfHeight * 0.725}`,
+				`C ${cx - halfWidth},${cy - halfHeight * 0.125} ${cx - halfWidth},${cy - halfHeight * 1.225} ${cx},${cy - halfHeight * 0.475}`,
+				"Z",
+			].join(" ");
+		},
+	}),
+	buildDefault(context) {
+		return {
+			type: "heart",
+			params: getDefaultSquareMaskParams(context),
+		};
+	},
+	computeParamUpdate: computeBoxMaskParamUpdate,
+	renderer: {
+		body: {
+			kind: "fillPath",
+			buildPath({ resolvedParams, width, height }) {
+				const params = resolvedParams;
+				const { centerX, centerY, maskWidth, maskHeight, rotationRad } =
+					getBoxLikeGeometry({ params, width, height });
+				return buildHeartPath({
+					centerX,
+					centerY,
+					halfWidth: maskWidth / 2,
+					halfHeight: maskHeight / 2,
+					rotationRad,
+				});
+			},
+		},
+		stroke: {
+			kind: "strokeFromPath",
+			buildStrokePath({ resolvedParams, width, height }) {
+				const params = resolvedParams;
+				const { centerX, centerY, maskWidth, maskHeight, rotationRad } =
+					getBoxLikeGeometry({ params, width, height });
+				const offset = getStrokeOffset({
+					strokeAlign: params.strokeAlign,
+					strokeWidth: params.strokeWidth,
+				});
+				return buildHeartPath({
+					centerX,
+					centerY,
+					halfWidth: Math.max(maskWidth / 2 + offset, 1),
+					halfHeight: Math.max(maskHeight / 2 + offset, 1),
+					rotationRad,
+				});
+			},
+		},
+	},
+};