From 3f6235fe3223abe5596aa5e50f024f5ad6ff7c47 Mon Sep 17 00:00:00 2001
From: luisangelsm <luisangelsm@gmail.com>
Date: Fri, 6 Mar 2026 17:19:02 +0100
Subject: [PATCH] Trigger a rendering pass when the settings change

---
 YACReader/continuous_page_widget.cpp | 7 +++++++
 YACReader/continuous_page_widget.h   | 1 +
 YACReader/main_window_viewer.cpp     | 2 +-
 YACReader/viewer.cpp                 | 9 +++++++++
 YACReader/viewer.h                   | 1 +
 5 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/YACReader/continuous_page_widget.cpp b/YACReader/continuous_page_widget.cpp
index 17b3f9c3..9391c1d1 100644
--- a/YACReader/continuous_page_widget.cpp
+++ b/YACReader/continuous_page_widget.cpp
@@ -2,6 +2,7 @@
 #include "continuous_view_model.h"
 #include "render.h"
 #include "resize_image.h"
+#include "configuration.h"
 
 #include <QPainter>
 #include <QPaintEvent>
@@ -78,6 +79,12 @@ QSize ContinuousPageWidget::sizeHint() const
     return QSize(width(), continuousViewModel->totalHeight());
 }
 
+void ContinuousPageWidget::invalidateScaledImageCache()
+{
+    scaledPageCache.invalidateAll();
+    update();
+}
+
 void ContinuousPageWidget::onPageAvailable(int absolutePageIndex)
 {
     if (!render || !continuousViewModel || absolutePageIndex < 0 || absolutePageIndex >= continuousViewModel->numPages()) {
diff --git a/YACReader/continuous_page_widget.h b/YACReader/continuous_page_widget.h
index 819d7a19..16be8f2f 100644
--- a/YACReader/continuous_page_widget.h
+++ b/YACReader/continuous_page_widget.h
@@ -28,6 +28,7 @@ public:
 
 public slots:
     void onPageAvailable(int absolutePageIndex);
+    void invalidateScaledImageCache();
 
 protected:
     void paintEvent(QPaintEvent *event) override;
diff --git a/YACReader/main_window_viewer.cpp b/YACReader/main_window_viewer.cpp
index f8f5a8ca..d83d4401 100644
--- a/YACReader/main_window_viewer.cpp
+++ b/YACReader/main_window_viewer.cpp
@@ -148,7 +148,7 @@ void MainWindowViewer::setupUI()
     connect(optionsDialog, &QDialog::accepted, viewer, &Viewer::updateOptions);
     connect(optionsDialog, &YACReaderOptionsDialog::optionsChanged, this, &MainWindowViewer::reloadOptions);
     connect(optionsDialog, &OptionsDialog::changedFilters, viewer, &Viewer::updateFilters);
-    connect(optionsDialog, &OptionsDialog::changedImageOptions, viewer, &Viewer::updatePage);
+    connect(optionsDialog, &OptionsDialog::changedImageOptions, viewer, &Viewer::onImageOptionsChanged);
 
     optionsDialog->restoreOptions(settings);
     // shortcutsDialog = new ShortcutsDialog(this);
diff --git a/YACReader/viewer.cpp b/YACReader/viewer.cpp
index fd5adefa..3675b6f9 100644
--- a/YACReader/viewer.cpp
+++ b/YACReader/viewer.cpp
@@ -358,6 +358,15 @@ void Viewer::goTo(unsigned int page)
     render->goTo(page);
 }
 
+void Viewer::onImageOptionsChanged()
+{
+    if (continuousScroll) {
+        continuousWidget->invalidateScaledImageCache();
+    } else {
+        updatePage();
+    }
+}
+
 void Viewer::updatePage()
 {
     if (continuousScroll) {
diff --git a/YACReader/viewer.h b/YACReader/viewer.h
index b2393a89..0189c7f4 100644
--- a/YACReader/viewer.h
+++ b/YACReader/viewer.h
@@ -58,6 +58,7 @@ public slots:
     void goToLastPage();
     void goTo(unsigned int page);
     void updatePage();
+    void onImageOptionsChanged();
     void updateContentSize();
     void updateVerticalScrollBar();
     void updateOptions();