fix

src/tool/canvasDrawing.js

@@ -108,30 +108,29 @@ function JScanvasMouseDown(str,e, width,patterning) {//创建线
 	}
 	return currentPatterning
 }
-function getWHXY(arr){
-	var minX = Number.MAX_SAFE_INTEGER;
-	var minY = Number.MAX_SAFE_INTEGER;
-	var maxX = Number.MIN_SAFE_INTEGER;
-	var maxY = Number.MIN_SAFE_INTEGER;
-
-	arr.forEach(function(object) {
-		var objectBoundingRect = object.getBoundingRect();
-		console.log(objectBoundingRect);
-		minX = Math.min(minX, objectBoundingRect.left);
-		minY = Math.min(minY, objectBoundingRect.top);
-		maxX = Math.max(maxX, objectBoundingRect.left + objectBoundingRect.width);
-		maxY = Math.max(maxY, objectBoundingRect.top + objectBoundingRect.height);
-	});
-	var width = maxX - minX;
-	var height = maxY - minY;
-	
-	let wHXY = {
-		width:width,
-		height:height,
-		x:minX,
-		y:minY,
+async function exportSele(canvas,format){
+	var activeObjects = canvas.getActiveObject();
+	if(activeObjects.length == 0){
+		return
 	}
-	return wHXY
+	var exportCanvas = new fabric.Canvas(null, {
+		width: activeObjects.width,
+		height: activeObjects.height
+	});
+	await new Promise((resolve, reject)=>{
+		activeObjects.clone((value)=>{
+			value.left = 0
+			value.top = 0
+			exportCanvas.add(value);
+			resolve()
+		})
+	})
+	exportCanvas.renderAll();
+	var imgData = exportCanvas.toDataURL({
+		format: format
+	});
+	exportCanvas.dispose()
+	return imgData
 }
 function JScreateCheck(e){//创建对号
 	let downPoint = e.absolutePointer
@@ -231,4 +230,4 @@ function JSRectUpdata(rect, downPointer, upPointer) {
 	})
 	return rect
 }
-export { multiselectJS, JSRectUpdata, JSchangeType, JScanvasMouseDown, JScanvasMouseMove,JScreateCheck,getWHXY }
+export { multiselectJS, JSRectUpdata, JSchangeType, JScanvasMouseDown, JScanvasMouseMove,JScreateCheck,exportSele }