From c44705e269e93c44bccc830d5e161e544a7b5ed9 Mon Sep 17 00:00:00 2001
From: Huang Xin <chrox.huang@gmail.com>
Date: Sun, 18 Jan 2026 08:58:00 +0100
Subject: [PATCH] perf(pdf): pre-render next page for PDFs (#2984)

This should close #1911 and #13.
---
 apps/readest-app/src/app/reader/components/FoliateViewer.tsx | 4 +++-
 apps/readest-app/src/services/constants.ts                   | 1 +
 packages/foliate-js                                          | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
index e0102924..253afaef 100644
--- a/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
+++ b/apps/readest-app/src/app/reader/components/FoliateViewer.tsx
@@ -188,7 +188,9 @@ const FoliateViewer: React.FC<{
         setViewSettings(bookKey, { ...viewSettings });
       }
 
-      mountAdditionalFonts(detail.doc, isCJKLang(bookData.book?.primaryLanguage));
+      if (!bookData?.isFixedLayout) {
+        mountAdditionalFonts(detail.doc, isCJKLang(bookData.book?.primaryLanguage));
+      }
 
       getLoadedFonts().forEach((font) => {
         mountCustomFont(detail.doc, font);
diff --git a/apps/readest-app/src/services/constants.ts b/apps/readest-app/src/services/constants.ts
index 1ac1e74a..e4cabcde 100644
--- a/apps/readest-app/src/services/constants.ts
+++ b/apps/readest-app/src/services/constants.ts
@@ -198,6 +198,7 @@ export const DEFAULT_MOBILE_VIEW_SETTINGS: Partial<ViewSettings> = {
   defaultFont: 'Sans-serif',
   marginBottomPx: 16,
   disableDoubleClick: true,
+  spreadMode: 'none',
 };
 
 export const DEFAULT_CJK_VIEW_SETTINGS: Partial<ViewSettings> = {
diff --git a/packages/foliate-js b/packages/foliate-js
index f443513d..29fd7aad 160000
--- a/packages/foliate-js
+++ b/packages/foliate-js
@@ -1 +1 @@
-Subproject commit f443513d52e677edf87c5771bcd5e139a90d4a39
+Subproject commit 29fd7aadf947639f86ce0de7f381a62b52bd32b4