From aed8e24afcad752371187e32a278104cf2addeb5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=A1=97=E8=A7=92=E5=B0=8F=E6=9E=97?= <1013335014@qq.com>
Date: Tue, 26 Dec 2023 12:20:12 +0800
Subject: [PATCH] =?UTF-8?q?Fix=EF=BC=9A=E4=BF=AE=E5=A4=8D=E8=8A=82?=
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---
 simple-mind-map/src/plugins/Export.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/simple-mind-map/src/plugins/Export.js b/simple-mind-map/src/plugins/Export.js
index 9d6c5d40..a48f0622 100644
--- a/simple-mind-map/src/plugins/Export.js
+++ b/simple-mind-map/src/plugins/Export.js
@@ -106,6 +106,21 @@ class Export {
           )
           let imgWidth = img.width
           let imgHeight = img.height
+          // 检查是否超出canvas支持的像素上限
+          const maxSize = 16384 / dpr
+          const maxArea = maxSize * maxSize
+          if (imgWidth * imgHeight > maxArea) {
+            let newWidth = null
+            let newHeight = null
+            if (imgWidth > maxSize) {
+              newWidth = maxArea / imgHeight
+            } else if (imgHeight > maxSize) {
+              newHeight = maxArea / imgWidth
+            }
+            const res = resizeImgSize(imgWidth, imgHeight, newWidth, newHeight)
+            imgWidth = res[0]
+            imgHeight = res[1]
+          }
           canvas.width = imgWidth * dpr
           canvas.height = imgHeight * dpr
           canvas.style.width = imgWidth + 'px'
@@ -205,6 +220,7 @@ class Export {
     const { str } = await this.getSvgData()
     const svgUrl = await this.fixSvgStrAndToBlob(str)
     const res = await this.svgToPng(svgUrl, transparent)
+    console.log(res)
     return res
   }