同步印花平铺的位置信息

src/component/Canvas/CanvasEditor/utils/helper.js

@@ -1093,4 +1093,22 @@ export	function traceImageContour(canvas) {
 	);
 
 	return contour;
-}
+}
+
+/**
+ * 图片添加gap转换
+ * @param {HTMLCanvasElement} image - img元素
+ * @param {Number} gapX - 水平gap
+ * @param {Number} gapY - 垂直gap
+ * @returns {HTMLCanvasElement} 转换后的canvas元素
+*/
+export function imageAddGapToCanvas(image, gapX, gapY) {
+	// 创建透明 Canvas
+	const tcanvas = document.createElement('canvas');
+	tcanvas.width = image.width + gapX;
+	tcanvas.height = image.height + gapY;
+	const ctx = tcanvas.getContext('2d');
+	ctx.clearRect(0, 0, tcanvas.width, tcanvas.height);
+	ctx.drawImage(image, 0, 0);
+	return tcanvas;
+}