From 5a3fa6bf20a05fa7a84f6a04a84c80e9c7002fe3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E8=BF=9B?= <lijin@lijindeMac-mini.local>
Date: Mon, 27 Jul 2026 16:29:43 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20convert-browser.js=20=E7=94=BB=E5=B8=83?=
 =?UTF-8?q?=E5=B0=BA=E5=AF=B8=E5=92=8C=20convert-w2p.js=20=E5=90=8C?=
 =?UTF-8?q?=E6=AD=A5?=
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多slide用容器尺寸，单slide用canvas（限制140cm）
---
 web-to-ppt/convert-browser.js | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/web-to-ppt/convert-browser.js b/web-to-ppt/convert-browser.js
index 05cded3..2bf7868 100644
--- a/web-to-ppt/convert-browser.js
+++ b/web-to-ppt/convert-browser.js
@@ -506,11 +506,15 @@ async function convertToPptx(input, onProgress) {
     slides.push({ background: slideBg, objects });
   }
 
-  // 6. 画布尺寸
-  const slideW2 = canvas.width || (slideGroups.length > 0 ? slideGroups[0].slideRect.w : 1920);
-  const slideH2 = Math.min(canvas.height || 1080, MAX_H_IN * 72);
-  const sw = slideW2 / 72;
-  const sh = Math.min(slideH2 / 72, MAX_H_IN);
+  // 6. 画布尺寸：多slide用容器尺寸，单slide用canvas（限制140cm）
+  var sizeSource;
+  if (slideGroups.length > 1) {
+    sizeSource = slideGroups[0].slideRect;
+  } else {
+    sizeSource = { w: canvas.width || 1920, h: Math.min(canvas.height || 1080, MAX_H_IN * 72) };
+  }
+  const sw = sizeSource.w / 72;
+  const sh = Math.min(sizeSource.h / 72, MAX_H_IN);
 
   return {
     presentation: { layout: 'CUSTOM', slideWidth: sw, slideHeight: sh },