From 99d1979e5634497b749005f1bafe8ac556adb1c7 Mon Sep 17 00:00:00 2001
From: qiang <guoshengqiang@live.com>
Date: Tue, 15 Dec 2020 10:24:54 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=20uni.canvasToTempFil?=
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 =?UTF-8?q?=E5=8F=96=E7=9A=84=E5=9B=BE=E5=83=8F=E7=A9=BA=E7=99=BD=E7=9A=84?=
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---
 src/core/view/components/canvas/index.vue | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/core/view/components/canvas/index.vue b/src/core/view/components/canvas/index.vue
index 491dc8712..3167fa003 100644
--- a/src/core/view/components/canvas/index.vue
+++ b/src/core/view/components/canvas/index.vue
@@ -365,12 +365,10 @@ export default {
     }) {
       const canvas = this.$refs.canvas
       let data
-      if (!width) {
-        width = canvas.offsetWidth - x
-      }
-      if (!height) {
-        height = canvas.offsetHeight - y
-      }
+      const maxWidth = canvas.offsetWidth - x
+      width = width ? Math.min(width, maxWidth) : maxWidth
+      const maxHeight = canvas.offsetHeight - y
+      height = height ? Math.min(height, maxWidth) : maxHeight
       if (!hidpi) {
         if (!destWidth && !destHeight) {
           destWidth = Math.round(width * pixelRatio)
-- 
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