refactor: preview contour correctly

src/components/md-deck/CardPreview.tsx

@@ -19,7 +19,11 @@ export function CardPreview(props: CardPreviewProps) {
   const selectionStyle = createMemo(() =>
     getSelectionBoxStyle(store.state.selectStart, store.state.selectEnd, store.state.dimensions)
   );
-  const shapeClipPath = createMemo(() => getShapeClipPath(store.state.shape));
+  const shapeClipPath = createMemo(() => {
+    const dims = store.state.dimensions;
+    if (!dims) return 'none';
+    return getShapeClipPath(store.state.shape, dims.cardWidth, dims.cardHeight, store.state.cornerRadius);
+  });
 
   const selection = useCardSelection(store);
 

src/components/md-deck/PrintPreview.tsx

@@ -152,7 +152,7 @@ export function PrintPreview(props: PrintPreviewProps) {
                       const cardWidth = store.state.dimensions?.cardWidth || 56;
                       const cardHeight = store.state.dimensions?.cardHeight || 88;
                       const clipPathId = `clip-${page.pageIndex}-${card.data.id || card.x}-${card.y}`;
-                      const shapeClipPath = getShapeSvgClipPath(clipPathId, cardWidth, cardHeight, store.state.shape);
+                      const shapeClipPath = getShapeSvgClipPath(clipPathId, cardWidth, cardHeight, store.state.shape, store.state.cornerRadius);
 
                       return (
                         <g class="card-group">

src/components/md-deck/hooks/shape-styles.ts

@@ -1,56 +1,95 @@
 import type { CardShape } from '../types';
+import { getCardShapePoints, contourToSvgPath } from '../../../plotcutter/contour';
+
+/**
+ * 将轮廓点转换为 CSS polygon() 格式
+ * @param points 轮廓点数组（相对于左上角，单位：mm）
+ * @returns CSS polygon() 字符串，使用百分比坐标
+ */
+function pointsToCssPolygon(points: [number, number][], width: number, height: number): string {
+  if (points.length === 0) return 'none';
+
+  const coords = points.map(([x, y]) => {
+    const percentX = (x / width) * 100;
+    const percentY = (y / height) * 100;
+    return `${percentX.toFixed(4)}% ${percentY.toFixed(4)}%`;
+  });
+
+  return `polygon(${coords.join(', ')})`;
+}
 
 /**
  * 获取 CSS clip-path 值用于形状裁剪
+ * 
+ * @param shape 卡片形状
+ * @param width 卡片宽度（用于计算多边形坐标）
+ * @param height 卡片高度（用于计算多边形坐标）
+ * @param cornerRadius 圆角半径（可选，>0 时使用多边形近似）
+ * @param segmentsPerCorner 每个圆角的分段数（可选）
  */
-export function getShapeClipPath(shape: CardShape): string {
+export function getShapeClipPath(
+  shape: CardShape,
+  width: number,
+  height: number,
+  cornerRadius: number = 0,
+  segmentsPerCorner: number = 4
+): string {
+  // 无圆角的基本形状使用简化的 CSS clip-path
+  if (cornerRadius <= 0) {
     switch (shape) {
       case 'circle':
         return 'circle(50% at 50% 50%)';
-    case 'triangle':
-      return 'polygon(50% 0%, 0% 100%, 100% 100%)';
-    case 'hexagon':
-      return 'polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%)';
       case 'rectangle':
-    default:
         return 'none';
     }
   }
 
+  // 其他情况使用多边形近似（包括圆角形状、三角形、六边形）
+  const points = getCardShapePoints(shape, width, height, cornerRadius, segmentsPerCorner);
+  return pointsToCssPolygon(points, width, height);
+}
+
 /**
  * 获取 SVG clipPath 定义
  * @param id clipPath 的唯一 ID
  * @param width 卡片宽度
  * @param height 卡片高度
  * @param shape 卡片形状
+ * @param cornerRadius 圆角半径（可选）
+ * @param segmentsPerCorner 每个圆角的分段数（可选）
  */
 export function getShapeSvgClipPath(
   id: string,
   width: number,
   height: number,
-  shape: CardShape
+  shape: CardShape,
+  cornerRadius: number = 0,
+  segmentsPerCorner: number = 4
 ): string {
-  const halfW = width / 2;
+  const points = getCardShapePoints(shape, width, height, cornerRadius, segmentsPerCorner);
-  const halfH = height / 2;
+  const pathData = contourToSvgPath(points, true);
 
-  switch (shape) {
-    case 'circle':
   return `
   <clipPath id="${id}">
-    <circle cx="${halfW}" cy="${halfH}" r="${halfW}" />
+    <path d="${pathData}" />
   </clipPath>`;
-    case 'triangle':
-      return `
-  <clipPath id="${id}">
-    <polygon points="${halfW},0 0,${height} ${width},${height}" />
-  </clipPath>`;
-    case 'hexagon':
-      return `
-  <clipPath id="${id}">
-    <polygon points="${halfW},0 ${width},${height * 0.25} ${width},${height * 0.75} ${halfW},${height} 0,${height * 0.75} 0,${height * 0.25}" />
-  </clipPath>`;
-    case 'rectangle':
-    default:
-      return '';
 }
+
+/**
+ * 获取卡片形状的 SVG path 数据
+ * @param width 卡片宽度
+ * @param height 卡片高度
+ * @param shape 卡片形状
+ * @param cornerRadius 圆角半径（可选）
+ * @param segmentsPerCorner 每个圆角的分段数（可选）
+ */
+export function getCardShapePath(
+  width: number,
+  height: number,
+  shape: CardShape,
+  cornerRadius: number = 0,
+  segmentsPerCorner: number = 4
+): string {
+  const points = getCardShapePoints(shape, width, height, cornerRadius, segmentsPerCorner);
+  return contourToSvgPath(points, true);
 }