From d8b280949135fdef0dfb637d34ea3ed4e8b2559f Mon Sep 17 00:00:00 2001
From: elvinpeng <elvinpeng@tencent.com>
Date: Sun, 29 Aug 2021 15:38:17 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=A2=9E=E5=8A=A0=20shouldClearRect=20?=
 =?UTF-8?q?=E9=85=8D=E7=BD=AE=EF=BC=8C=E5=85=81=E8=AE=B8=E5=9C=A8=E7=BB=98?=
 =?UTF-8?q?=E5=88=B6=E5=89=8D=E4=B8=8D=E6=B8=85=E7=A9=BA=20canvas?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/index.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/index.js b/src/index.js
index ffa8834..5ca528e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -47,7 +47,7 @@ Component({
   },
   methods: {
     async renderToCanvas(args) {
-      const {wxml, style} = args
+      const {wxml, style, shouldClearRect = true} = args
       const ctx = this.ctx
       const canvas = this.canvas
       const use2dCanvas = this.data.use2dCanvas
@@ -56,7 +56,9 @@ Component({
         return Promise.reject(new Error('renderToCanvas: fail canvas has not been created'))
       }
 
-      ctx.clearRect(0, 0, this.data.width, this.data.height)
+      if (shouldClearRect) {
+        ctx.clearRect(0, 0, this.data.width, this.data.height)
+      }
       const {root: xom} = xmlParse(wxml)
 
       const widget = new Widget(xom, style)