Add font foverrides to reader menu

Co-authored-by: Copilot <copilot@github.com>

lib/I18n/translations/english.yaml

@@ -518,6 +518,7 @@ STR_IMAGE_DISPLAY_GRAYSCALE: ">> Gray"
 STR_WEATHER_MOON_INFO: "Moon"
 STR_WEATHER_SUN_INFO: "Sun"
 STR_READER_BOOKMARKS: "Bookmarks & Footnotes"
+STR_READER_OVERRIDES: "Book-specific overrides"
 STR_READER_UTILS: "Helper"
 STR_READER_TOOLS: "Tools"
 STR_READER_NAVIGATION: "Navigation"

src/JsonSettingsIO.cpp

@@ -394,6 +394,8 @@ bool JsonSettingsIO::saveRecentBooks(const RecentBooksStore& store, const char*
     obj["coverBmpPath"] = book.coverBmpPath;
     obj["embeddedStyleOverride"] = book.embeddedStyleOverride;
     obj["imageRenderingOverride"] = book.imageRenderingOverride;
+    obj["fontFamilyOverride"] = book.fontFamilyOverride;
+    obj["fontSizeOverride"] = book.fontSizeOverride;
   }
 
   String json;
@@ -428,6 +430,9 @@ bool JsonSettingsIO::loadRecentBooks(RecentBooksStore& store, const char* json)
     book.coverBmpPath = obj["coverBmpPath"] | std::string("");
     book.embeddedStyleOverride = clampInt8(obj["embeddedStyleOverride"] | -1, -1, 1, -1);
     book.imageRenderingOverride = clampInt8(obj["imageRenderingOverride"] | -1, -1, 2, -1);
+    book.fontFamilyOverride =
+        clampInt8(obj["fontFamilyOverride"] | -1, -1, CrossPointSettings::FONT_FAMILY_COUNT - 1, -1);
+    book.fontSizeOverride = clampInt8(obj["fontSizeOverride"] | -1, -1, CrossPointSettings::FONT_SIZE_COUNT - 1, -1);
     store.recentBooks.push_back(book);
   }
 

src/RecentBooksStore.cpp

@@ -24,6 +24,8 @@ void RecentBooksStore::addBook(const std::string& path, const std::string& title
                                const std::string& series, const std::string& coverBmpPath) {
   int8_t embeddedStyleOverride = -1;
   int8_t imageRenderingOverride = -1;
+  int8_t fontFamilyOverride = -1;
+  int8_t fontSizeOverride = -1;
 
   // Remove existing entry if present
   auto it =
@@ -31,12 +33,14 @@ void RecentBooksStore::addBook(const std::string& path, const std::string& title
   if (it != recentBooks.end()) {
     embeddedStyleOverride = it->embeddedStyleOverride;
     imageRenderingOverride = it->imageRenderingOverride;
+    fontFamilyOverride = it->fontFamilyOverride;
+    fontSizeOverride = it->fontSizeOverride;
     recentBooks.erase(it);
   }
 
   // Add to front
-  recentBooks.insert(recentBooks.begin(),
-                     {path, title, author, series, coverBmpPath, embeddedStyleOverride, imageRenderingOverride});
+  recentBooks.insert(recentBooks.begin(), {path, title, author, series, coverBmpPath, embeddedStyleOverride,
+                                           imageRenderingOverride, fontFamilyOverride, fontSizeOverride});
 
   // Trim to max size
   if (recentBooks.size() > MAX_RECENT_BOOKS) {
@@ -80,6 +84,12 @@ RecentBook RecentBooksStore::getBookByPath(const std::string& path) const {
 
 bool RecentBooksStore::setReaderOverrides(const std::string& path, const int8_t embeddedStyleOverride,
                                           const int8_t imageRenderingOverride) {
+  return setReaderOverrides(path, embeddedStyleOverride, imageRenderingOverride, -1, -1);
+}
+
+bool RecentBooksStore::setReaderOverrides(const std::string& path, const int8_t embeddedStyleOverride,
+                                          const int8_t imageRenderingOverride, const int8_t fontFamilyOverride,
+                                          const int8_t fontSizeOverride) {
   auto it =
       std::find_if(recentBooks.begin(), recentBooks.end(), [&](const RecentBook& book) { return book.path == path; });
   if (it == recentBooks.end()) {
@@ -88,6 +98,8 @@ bool RecentBooksStore::setReaderOverrides(const std::string& path, const int8_t
 
   it->embeddedStyleOverride = embeddedStyleOverride;
   it->imageRenderingOverride = imageRenderingOverride;
+  it->fontFamilyOverride = fontFamilyOverride;
+  it->fontSizeOverride = fontSizeOverride;
   return saveToFile();
 }
 

src/RecentBooksStore.h

@@ -13,6 +13,10 @@ struct RecentBook {
   int8_t embeddedStyleOverride = -1;
   // -1 = use global setting, otherwise CrossPointSettings::IMAGE_RENDERING value.
   int8_t imageRenderingOverride = -1;
+  // -1 = use global setting, otherwise CrossPointSettings::FONT_FAMILY value.
+  int8_t fontFamilyOverride = -1;
+  // -1 = use global setting, otherwise CrossPointSettings::FONT_SIZE value.
+  int8_t fontSizeOverride = -1;
 
   bool operator==(const RecentBook& other) const { return path == other.path; }
 };
@@ -58,6 +62,8 @@ class RecentBooksStore {
   RecentBook getDataFromBook(std::string path) const;
   RecentBook getBookByPath(const std::string& path) const;
   bool setReaderOverrides(const std::string& path, int8_t embeddedStyleOverride, int8_t imageRenderingOverride);
+  bool setReaderOverrides(const std::string& path, int8_t embeddedStyleOverride, int8_t imageRenderingOverride,
+                          int8_t fontFamilyOverride, int8_t fontSizeOverride);
 
  private:
   bool loadFromBinaryFile();

src/activities/ActivityResult.h

@@ -24,6 +24,8 @@ struct MenuResult {
   uint8_t pageTurnOption = 0;
   int8_t embeddedStyleOverride = -1;
   int8_t imageRenderingOverride = -1;
+  int8_t fontFamilyOverride = -1;
+  int8_t fontSizeOverride = -1;
   uint8_t textDarkness = 1;
 };
 

src/activities/reader/EpubReaderActivity.cpp

@@ -148,6 +148,8 @@ void EpubReaderActivity::onEnter() {
   const RecentBook currentBook = RECENT_BOOKS.getBookByPath(epub->getPath());
   bookEmbeddedStyleOverride = currentBook.embeddedStyleOverride;
   bookImageRenderingOverride = currentBook.imageRenderingOverride;
+  bookFontFamilyOverride = currentBook.fontFamilyOverride;
+  bookFontSizeOverride = currentBook.fontSizeOverride;
   logReaderMemSnapshot("onEnter_after_recent_books");
 
   // Trigger first update
@@ -239,22 +241,23 @@ void EpubReaderActivity::loop() {
     const bool isCurrentPageStarred = section && bookmarkStore.has(static_cast<uint16_t>(currentSpineIndex),
                                                                    static_cast<uint16_t>(section->currentPage));
     ReaderUtils::enforceExitFullRefresh(renderer);
-    startActivityForResult(
-        std::make_unique<EpubReaderMenuActivity>(
-            renderer, mappedInput, epub->getTitle(), currentPage, totalPages, bookProgressPercent, SETTINGS.orientation,
-            !currentPageFootnotes.empty(), bookEmbeddedStyleOverride, bookImageRenderingOverride, SETTINGS.textDarkness,
-            !bookmarkStore.isEmpty(), isCurrentPageStarred),
-        [this](const ActivityResult& result) {
-          // Always apply orientation/darkness change even if the menu was cancelled
-          const auto& menu = std::get<MenuResult>(result.data);
-          applyOrientation(menu.orientation);
-          applyTextDarkness(menu.textDarkness);
-          toggleAutoPageTurn(menu.pageTurnOption);
-          applyBookReaderOverrides(menu.embeddedStyleOverride, menu.imageRenderingOverride);
-          if (!result.isCancelled) {
-            onReaderMenuConfirm(static_cast<EpubReaderMenuActivity::MenuAction>(menu.action));
-          }
-        });
+    startActivityForResult(std::make_unique<EpubReaderMenuActivity>(
+                               renderer, mappedInput, epub->getTitle(), currentPage, totalPages, bookProgressPercent,
+                               SETTINGS.orientation, !currentPageFootnotes.empty(), bookEmbeddedStyleOverride,
+                               bookImageRenderingOverride, bookFontFamilyOverride, bookFontSizeOverride,
+                               SETTINGS.textDarkness, !bookmarkStore.isEmpty(), isCurrentPageStarred),
+                           [this](const ActivityResult& result) {
+                             // Always apply orientation/darkness change even if the menu was cancelled
+                             const auto& menu = std::get<MenuResult>(result.data);
+                             applyOrientation(menu.orientation);
+                             applyTextDarkness(menu.textDarkness);
+                             toggleAutoPageTurn(menu.pageTurnOption);
+                             applyBookReaderOverrides(menu.embeddedStyleOverride, menu.imageRenderingOverride,
+                                                      menu.fontFamilyOverride, menu.fontSizeOverride);
+                             if (!result.isCancelled) {
+                               onReaderMenuConfirm(static_cast<EpubReaderMenuActivity::MenuAction>(menu.action));
+                             }
+                           });
   }
 
   // Long press BACK (1s+) goes to home screen
@@ -814,18 +817,23 @@ void EpubReaderActivity::toggleAutoPageTurn(const uint8_t selectedPageTurnOption
 }
 
 void EpubReaderActivity::applyBookReaderOverrides(const int8_t embeddedStyleOverride,
-                                                  const int8_t imageRenderingOverride) {
+                                                  const int8_t imageRenderingOverride, const int8_t fontFamilyOverride,
+                                                  const int8_t fontSizeOverride) {
   if (!epub) {
     return;
   }
 
-  if (bookEmbeddedStyleOverride == embeddedStyleOverride && bookImageRenderingOverride == imageRenderingOverride) {
+  if (bookEmbeddedStyleOverride == embeddedStyleOverride && bookImageRenderingOverride == imageRenderingOverride &&
+      bookFontFamilyOverride == fontFamilyOverride && bookFontSizeOverride == fontSizeOverride) {
     return;
   }
 
   bookEmbeddedStyleOverride = embeddedStyleOverride;
   bookImageRenderingOverride = imageRenderingOverride;
-  RECENT_BOOKS.setReaderOverrides(epub->getPath(), bookEmbeddedStyleOverride, bookImageRenderingOverride);
+  bookFontFamilyOverride = fontFamilyOverride;
+  bookFontSizeOverride = fontSizeOverride;
+  RECENT_BOOKS.setReaderOverrides(epub->getPath(), bookEmbeddedStyleOverride, bookImageRenderingOverride,
+                                  bookFontFamilyOverride, bookFontSizeOverride);
 
   RenderLock lock(*this);
   if (section) {
@@ -850,6 +858,51 @@ uint8_t EpubReaderActivity::getEffectiveImageRendering() const {
   return SETTINGS.imageRendering;
 }
 
+int EpubReaderActivity::getEffectiveReaderFontId() const {
+  const uint8_t fontFamily =
+      (bookFontFamilyOverride >= 0) ? static_cast<uint8_t>(bookFontFamilyOverride) : SETTINGS.fontFamily;
+  const uint8_t fontSize = (bookFontSizeOverride >= 0) ? static_cast<uint8_t>(bookFontSizeOverride) : SETTINGS.fontSize;
+  switch (fontFamily) {
+    case CrossPointSettings::NOTOSANS:
+      switch (fontSize) {
+        case CrossPointSettings::SMALL:
+          return NOTOSANS_12_FONT_ID;
+        case CrossPointSettings::MEDIUM:
+        default:
+          return NOTOSANS_14_FONT_ID;
+        case CrossPointSettings::LARGE:
+          return NOTOSANS_16_FONT_ID;
+        case CrossPointSettings::EXTRA_LARGE:
+          return NOTOSANS_18_FONT_ID;
+      }
+    case CrossPointSettings::OPENDYSLEXIC:
+      switch (fontSize) {
+        case CrossPointSettings::SMALL:
+          return OPENDYSLEXIC_8_FONT_ID;
+        case CrossPointSettings::MEDIUM:
+        default:
+          return OPENDYSLEXIC_10_FONT_ID;
+        case CrossPointSettings::LARGE:
+          return OPENDYSLEXIC_12_FONT_ID;
+        case CrossPointSettings::EXTRA_LARGE:
+          return OPENDYSLEXIC_14_FONT_ID;
+      }
+    case CrossPointSettings::BOOKERLY:
+    default:
+      switch (fontSize) {
+        case CrossPointSettings::SMALL:
+          return BOOKERLY_12_FONT_ID;
+        case CrossPointSettings::MEDIUM:
+        default:
+          return BOOKERLY_14_FONT_ID;
+        case CrossPointSettings::LARGE:
+          return BOOKERLY_16_FONT_ID;
+        case CrossPointSettings::EXTRA_LARGE:
+          return BOOKERLY_18_FONT_ID;
+      }
+  }
+}
+
 void EpubReaderActivity::pageTurn(bool isForwardTurn) {
   if (isForwardTurn) {
     if (section->currentPage < section->pageCount - 1) {
@@ -934,7 +987,7 @@ void EpubReaderActivity::render(RenderLock&& lock) {
     LOG_DBG("ERS", "Loading file: %s, index: %d", filepath.c_str(), currentSpineIndex);
     section = std::make_unique<Section>(epub, currentSpineIndex, renderer);
 
-    if (!section->loadSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
+    if (!section->loadSectionFile(getEffectiveReaderFontId(), SETTINGS.getReaderLineCompression(),
                                   SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
                                   viewportHeight, SETTINGS.hyphenationEnabled, embeddedStyle, imageRendering)) {
       LOG_DBG("ERS", "Cache not found, building...");
@@ -947,7 +1000,7 @@ void EpubReaderActivity::render(RenderLock&& lock) {
         GUI.fillPopupProgress(renderer, popupRect, progress);
       };
 
-      if (!section->createSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
+      if (!section->createSectionFile(getEffectiveReaderFontId(), SETTINGS.getReaderLineCompression(),
                                       SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
                                       viewportHeight, SETTINGS.hyphenationEnabled, embeddedStyle, imageRendering,
                                       progressFn)) {
@@ -1090,14 +1143,14 @@ void EpubReaderActivity::silentIndexNextChapterIfNeeded(const uint16_t viewportW
   const uint8_t imageRendering = getEffectiveImageRendering();
 
   Section nextSection(epub, nextSpineIndex, renderer);
-  if (nextSection.loadSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
+  if (nextSection.loadSectionFile(getEffectiveReaderFontId(), SETTINGS.getReaderLineCompression(),
                                   SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
                                   viewportHeight, SETTINGS.hyphenationEnabled, embeddedStyle, imageRendering)) {
     return;
   }
 
   LOG_DBG("ERS", "Silently indexing next chapter: %d", nextSpineIndex);
-  if (!nextSection.createSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
+  if (!nextSection.createSectionFile(getEffectiveReaderFontId(), SETTINGS.getReaderLineCompression(),
                                      SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
                                      viewportHeight, SETTINGS.hyphenationEnabled, embeddedStyle, imageRendering)) {
     LOG_ERR("ERS", "Failed silent indexing for chapter: %d", nextSpineIndex);
@@ -1133,7 +1186,7 @@ void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int or
   // Font prewarm: scan pass accumulates text, then prewarm, then real render
   const uint32_t heapBefore = esp_get_free_heap_size();
   auto scope = fcm->createPrewarmScope();
-  page->render(renderer, SETTINGS.getReaderFontId(), orientedMarginLeft, orientedMarginTop);  // scan pass
+  page->render(renderer, getEffectiveReaderFontId(), orientedMarginLeft, orientedMarginTop);  // scan pass
   scope.endScanAndPrewarm();
   const uint32_t heapAfter = esp_get_free_heap_size();
   fcm->logStats("prewarm");
@@ -1149,7 +1202,7 @@ void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int or
   pendingHalfRefreshAfterImagePage = false;
 
   logReaderMemSnapshot("before_bw_render");
-  page->render(renderer, SETTINGS.getReaderFontId(), orientedMarginLeft, orientedMarginTop);
+  page->render(renderer, getEffectiveReaderFontId(), orientedMarginLeft, orientedMarginTop);
   renderStatusBar();
   fcm->logStats("bw_render");
   const auto tBwRender = millis();
@@ -1168,7 +1221,7 @@ void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int or
 
       // Re-render page content to restore images into the blanked area
       // Status bar is not re-rendered here to avoid reading stale dynamic values (e.g. battery %)
-      page->render(renderer, SETTINGS.getReaderFontId(), orientedMarginLeft, orientedMarginTop);
+      page->render(renderer, getEffectiveReaderFontId(), orientedMarginLeft, orientedMarginTop);
       renderer.displayBuffer(HalDisplay::FAST_REFRESH);
     } else {
       renderer.displayBuffer(HalDisplay::HALF_REFRESH);
@@ -1201,7 +1254,7 @@ void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int or
     logReaderMemSnapshot("gray_lsb_begin");
     renderer.clearScreen(0x00);
     renderer.setRenderMode(GfxRenderer::GRAYSCALE_LSB);
-    page->render(renderer, SETTINGS.getReaderFontId(), orientedMarginLeft, orientedMarginTop);
+    page->render(renderer, getEffectiveReaderFontId(), orientedMarginLeft, orientedMarginTop);
     renderer.copyGrayscaleLsbBuffers();
     const auto tGrayLsb = millis();
     logReaderMemSnapshot("gray_lsb_end");
@@ -1210,7 +1263,7 @@ void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int or
     logReaderMemSnapshot("gray_msb_begin");
     renderer.clearScreen(0x00);
     renderer.setRenderMode(GfxRenderer::GRAYSCALE_MSB);
-    page->render(renderer, SETTINGS.getReaderFontId(), orientedMarginLeft, orientedMarginTop);
+    page->render(renderer, getEffectiveReaderFontId(), orientedMarginLeft, orientedMarginTop);
     renderer.copyGrayscaleMsbBuffers();
     const auto tGrayMsb = millis();
     logReaderMemSnapshot("gray_msb_end");
@@ -1385,16 +1438,63 @@ bool EpubReaderActivity::drawCurrentPageToBuffer(const std::string& filePath, Gf
 
   // Load or rebuild the section cache. Rebuilding is needed when the cache is missing or stale
   // (e.g. after a firmware update). A no-op popup callback avoids any UI during sleep preparation.
+  const RecentBook currentBook = RECENT_BOOKS.getBookByPath(filePath);
+  const uint8_t effectiveFontFamily =
+      currentBook.fontFamilyOverride >= 0 ? static_cast<uint8_t>(currentBook.fontFamilyOverride) : SETTINGS.fontFamily;
+  const uint8_t effectiveFontSize =
+      currentBook.fontSizeOverride >= 0 ? static_cast<uint8_t>(currentBook.fontSizeOverride) : SETTINGS.fontSize;
+  auto getEffectiveFontId = [&](uint8_t family, uint8_t size) {
+    switch (family) {
+      case CrossPointSettings::NOTOSANS:
+        switch (size) {
+          case CrossPointSettings::SMALL:
+            return NOTOSANS_12_FONT_ID;
+          case CrossPointSettings::LARGE:
+            return NOTOSANS_16_FONT_ID;
+          case CrossPointSettings::EXTRA_LARGE:
+            return NOTOSANS_18_FONT_ID;
+          case CrossPointSettings::MEDIUM:
+          default:
+            return NOTOSANS_14_FONT_ID;
+        }
+      case CrossPointSettings::OPENDYSLEXIC:
+        switch (size) {
+          case CrossPointSettings::SMALL:
+            return OPENDYSLEXIC_8_FONT_ID;
+          case CrossPointSettings::LARGE:
+            return OPENDYSLEXIC_12_FONT_ID;
+          case CrossPointSettings::EXTRA_LARGE:
+            return OPENDYSLEXIC_14_FONT_ID;
+          case CrossPointSettings::MEDIUM:
+          default:
+            return OPENDYSLEXIC_10_FONT_ID;
+        }
+      case CrossPointSettings::BOOKERLY:
+      default:
+        switch (size) {
+          case CrossPointSettings::SMALL:
+            return BOOKERLY_12_FONT_ID;
+          case CrossPointSettings::LARGE:
+            return BOOKERLY_16_FONT_ID;
+          case CrossPointSettings::EXTRA_LARGE:
+            return BOOKERLY_18_FONT_ID;
+          case CrossPointSettings::MEDIUM:
+          default:
+            return BOOKERLY_14_FONT_ID;
+        }
+    }
+  };
+
   auto section = std::make_unique<Section>(epub, spineIndex, renderer);
-  if (!section->loadSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
-                                SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
-                                viewportHeight, SETTINGS.hyphenationEnabled, SETTINGS.embeddedStyle,
-                                SETTINGS.imageRendering)) {
+  if (!section->loadSectionFile(getEffectiveFontId(effectiveFontFamily, effectiveFontSize),
+                                SETTINGS.getReaderLineCompression(), SETTINGS.extraParagraphSpacing,
+                                SETTINGS.paragraphAlignment, viewportWidth, viewportHeight, SETTINGS.hyphenationEnabled,
+                                SETTINGS.embeddedStyle, SETTINGS.imageRendering)) {
     LOG_DBG("SLP", "EPUB: section cache not found for spine %d, rebuilding", spineIndex);
-    if (!section->createSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
-                                    SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
-                                    viewportHeight, SETTINGS.hyphenationEnabled, SETTINGS.embeddedStyle,
-                                    SETTINGS.imageRendering)) {
+    if (!section->createSectionFile(getEffectiveFontId(effectiveFontFamily, effectiveFontSize),
+                                    SETTINGS.getReaderLineCompression(), SETTINGS.extraParagraphSpacing,
+                                    SETTINGS.paragraphAlignment, viewportWidth, viewportHeight,
+                                    SETTINGS.hyphenationEnabled, SETTINGS.embeddedStyle, SETTINGS.imageRendering)) {
       LOG_ERR("SLP", "EPUB: failed to rebuild section cache for spine %d", spineIndex);
       return false;
     }
@@ -1410,7 +1510,7 @@ bool EpubReaderActivity::drawCurrentPageToBuffer(const std::string& filePath, Gf
   }
 
   renderer.clearScreen();
-  page->render(renderer, SETTINGS.getReaderFontId(), marginLeft, marginTop);
+  page->render(renderer, getEffectiveFontId(effectiveFontFamily, effectiveFontSize), marginLeft, marginTop);
   // No displayBuffer call — caller (SleepActivity) handles that after compositing the overlay
   return true;
 }

src/activities/reader/EpubReaderActivity.h

@@ -53,6 +53,8 @@ class EpubReaderActivity final : public Activity {
   // -1 means use global SETTINGS value.
   int8_t bookEmbeddedStyleOverride = -1;
   int8_t bookImageRenderingOverride = -1;
+  int8_t bookFontFamilyOverride = -1;
+  int8_t bookFontSizeOverride = -1;
 
   // Bookmarks (starred pages)
   BookmarkStore bookmarkStore;
@@ -88,9 +90,11 @@ class EpubReaderActivity final : public Activity {
   void applyOrientation(uint8_t orientation);
   void applyTextDarkness(uint8_t textDarkness);
   void toggleAutoPageTurn(uint8_t selectedPageTurnOption);
-  void applyBookReaderOverrides(int8_t embeddedStyleOverride, int8_t imageRenderingOverride);
+  void applyBookReaderOverrides(int8_t embeddedStyleOverride, int8_t imageRenderingOverride, int8_t fontFamilyOverride,
+                                int8_t fontSizeOverride);
   bool getEffectiveEmbeddedStyle() const;
   uint8_t getEffectiveImageRendering() const;
+  int getEffectiveReaderFontId() const;
   void pageTurn(bool isForwardTurn);
 
   // Footnote navigation

src/activities/reader/EpubReaderMenuActivity.cpp

@@ -13,13 +13,16 @@ EpubReaderMenuActivity::EpubReaderMenuActivity(GfxRenderer& renderer, MappedInpu
                                                const int bookProgressPercent, const uint8_t currentOrientation,
                                                const bool hasFootnotes, const int8_t initialEmbeddedStyleOverride,
                                                const int8_t initialImageRenderingOverride,
-                                               const uint8_t initialTextDarkness, const bool hasStarredPages,
-                                               const bool isCurrentPageStarred)
+                                               const int8_t initialFontFamilyOverride,
+                                               const int8_t initialFontSizeOverride, const uint8_t initialTextDarkness,
+                                               const bool hasStarredPages, const bool isCurrentPageStarred)
     : MenuListActivity("EpubReaderMenu", renderer, mappedInput),
       currentPageStarred(isCurrentPageStarred),
       pendingOrientation(currentOrientation),
       pendingEmbeddedStyleOverride(initialEmbeddedStyleOverride),
       pendingImageRenderingOverride(initialImageRenderingOverride),
+      pendingFontFamilyOverride(initialFontFamilyOverride),
+      pendingFontSizeOverride(initialFontSizeOverride),
       pendingTextDarkness(initialTextDarkness),
       title(title),
       currentPage(currentPage),
@@ -51,50 +54,6 @@ void EpubReaderMenuActivity::buildMenuItems(bool hasFootnotes, bool hasStarredPa
   menuItems.push_back(SettingInfo::Separator(StrId::STR_READER_APPEARANCE));
 
   auto* self = this;
-
-  // Embedded style: cycles default(-1) -> ON(1) -> OFF(0) via DynamicEnum indices 0/1/2
-  menuItems.push_back(SettingInfo::DynamicEnumCtx(
-      StrId::STR_EMBEDDED_STYLE, {StrId::STR_DEFAULT_VALUE, StrId::STR_STATE_ON, StrId::STR_STATE_OFF}, self,
-      [](const void* ctx) -> uint8_t {
-        const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
-        if (s->pendingEmbeddedStyleOverride < 0) return 0;
-        if (s->pendingEmbeddedStyleOverride > 0) return 1;
-        return 2;
-      },
-      [](void* ctx, uint8_t v) {
-        auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
-        if (v == 0)
-          s->pendingEmbeddedStyleOverride = -1;
-        else if (v == 1)
-          s->pendingEmbeddedStyleOverride = 1;
-        else
-          s->pendingEmbeddedStyleOverride = 0;
-      }));
-
-  // Image rendering: cycles default(-1) -> display(0) -> placeholder(1) -> suppress(2)
-  menuItems.push_back(SettingInfo::DynamicEnumCtx(
-      StrId::STR_IMAGES,
-      {StrId::STR_DEFAULT_VALUE, StrId::STR_IMAGES_DISPLAY, StrId::STR_IMAGES_PLACEHOLDER, StrId::STR_IMAGES_SUPPRESS},
-      self,
-      [](const void* ctx) -> uint8_t {
-        const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
-        return (s->pendingImageRenderingOverride < 0) ? 0 : (s->pendingImageRenderingOverride + 1);
-      },
-      [](void* ctx, uint8_t v) {
-        auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
-        s->pendingImageRenderingOverride = (v == 0) ? -1 : static_cast<int8_t>(v - 1);
-      }));
-
-  // Text darkness: straightforward 0-3 cycle
-  menuItems.push_back(SettingInfo::DynamicEnumCtx(
-      StrId::STR_TEXT_DARKNESS, {StrId::STR_NORMAL, StrId::STR_DARK, StrId::STR_EXTRA_DARK, StrId::STR_MAX_DARK}, self,
-      [](const void* ctx) -> uint8_t { return static_cast<const EpubReaderMenuActivity*>(ctx)->pendingTextDarkness; },
-      [](void* ctx, uint8_t v) { static_cast<EpubReaderMenuActivity*>(ctx)->pendingTextDarkness = v; }));
-
-  // Helper functions, reading ruler, auto page turn, orientation
-  menuItems.push_back(SettingInfo::Separator(StrId::STR_READER_UTILS));
-  // Auto page turn: ACTION type with custom cycling in onActionSelected
-  menuItems.push_back(SettingInfo::Action(StrId::STR_AUTO_TURN_PAGES_PER_MIN, SettingAction::None));
   // Orientation: straightforward 0-3 cycle
   menuItems.push_back(SettingInfo::DynamicEnumCtx(
       StrId::STR_ORIENTATION,
@@ -102,6 +61,89 @@ void EpubReaderMenuActivity::buildMenuItems(bool hasFootnotes, bool hasStarredPa
       [](const void* ctx) -> uint8_t { return static_cast<const EpubReaderMenuActivity*>(ctx)->pendingOrientation; },
       [](void* ctx, uint8_t v) { static_cast<EpubReaderMenuActivity*>(ctx)->pendingOrientation = v; }));
 
+  // Embedded style: cycles default(-1) -> ON(1) -> OFF(0) via DynamicEnum indices 0/1/2
+  menuItems.push_back(SettingInfo::DynamicEnumCtx(
+                          StrId::STR_EMBEDDED_STYLE,
+                          {StrId::STR_DEFAULT_VALUE, StrId::STR_STATE_ON, StrId::STR_STATE_OFF}, self,
+                          [](const void* ctx) -> uint8_t {
+                            const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
+                            if (s->pendingEmbeddedStyleOverride < 0) return 0;
+                            if (s->pendingEmbeddedStyleOverride > 0) return 1;
+                            return 2;
+                          },
+                          [](void* ctx, uint8_t v) {
+                            auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
+                            if (v == 0)
+                              s->pendingEmbeddedStyleOverride = -1;
+                            else if (v == 1)
+                              s->pendingEmbeddedStyleOverride = 1;
+                            else
+                              s->pendingEmbeddedStyleOverride = 0;
+                          })
+                          .withSubmenu(StrId::STR_READER_OVERRIDES));
+
+  // Image rendering: cycles default(-1) -> display(0) -> placeholder(1) -> suppress(2)
+  menuItems.push_back(SettingInfo::DynamicEnumCtx(
+                          StrId::STR_IMAGES,
+                          {StrId::STR_DEFAULT_VALUE, StrId::STR_IMAGES_DISPLAY, StrId::STR_IMAGES_PLACEHOLDER,
+                           StrId::STR_IMAGES_SUPPRESS},
+                          self,
+                          [](const void* ctx) -> uint8_t {
+                            const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
+                            return (s->pendingImageRenderingOverride < 0) ? 0 : (s->pendingImageRenderingOverride + 1);
+                          },
+                          [](void* ctx, uint8_t v) {
+                            auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
+                            s->pendingImageRenderingOverride = (v == 0) ? -1 : static_cast<int8_t>(v - 1);
+                          })
+                          .withSubmenu(StrId::STR_READER_OVERRIDES));
+
+  // Reader font family: cycles default(-1) -> Bookerly(0) -> Noto Sans(1) -> Open Dyslexic(2)
+  menuItems.push_back(
+      SettingInfo::DynamicEnumCtx(
+          StrId::STR_FONT_FAMILY,
+          {StrId::STR_DEFAULT_VALUE, StrId::STR_BOOKERLY, StrId::STR_NOTO_SANS, StrId::STR_OPEN_DYSLEXIC}, self,
+          [](const void* ctx) -> uint8_t {
+            const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
+            return (s->pendingFontFamilyOverride < 0) ? 0 : static_cast<uint8_t>(s->pendingFontFamilyOverride + 1);
+          },
+          [](void* ctx, uint8_t v) {
+            auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
+            s->pendingFontFamilyOverride = (v == 0) ? -1 : static_cast<int8_t>(v - 1);
+          })
+          .withSubmenu(StrId::STR_READER_OVERRIDES));
+
+  // Reader font size: cycles default(-1) -> Small(0) -> Medium(1) -> Large(2) -> X Large(3)
+  menuItems.push_back(
+      SettingInfo::DynamicEnumCtx(
+          StrId::STR_FONT_SIZE,
+          {StrId::STR_DEFAULT_VALUE, StrId::STR_SMALL, StrId::STR_MEDIUM, StrId::STR_LARGE, StrId::STR_X_LARGE}, self,
+          [](const void* ctx) -> uint8_t {
+            const auto* s = static_cast<const EpubReaderMenuActivity*>(ctx);
+            return (s->pendingFontSizeOverride < 0) ? 0 : static_cast<uint8_t>(s->pendingFontSizeOverride + 1);
+          },
+          [](void* ctx, uint8_t v) {
+            auto* s = static_cast<EpubReaderMenuActivity*>(ctx);
+            s->pendingFontSizeOverride = (v == 0) ? -1 : static_cast<int8_t>(v - 1);
+          })
+          .withSubmenu(StrId::STR_READER_OVERRIDES));
+
+  // Text darkness: straightforward 0-3 cycle
+  menuItems.push_back(
+      SettingInfo::DynamicEnumCtx(
+          StrId::STR_TEXT_DARKNESS, {StrId::STR_NORMAL, StrId::STR_DARK, StrId::STR_EXTRA_DARK, StrId::STR_MAX_DARK},
+          self,
+          [](const void* ctx) -> uint8_t {
+            return static_cast<const EpubReaderMenuActivity*>(ctx)->pendingTextDarkness;
+          },
+          [](void* ctx, uint8_t v) { static_cast<EpubReaderMenuActivity*>(ctx)->pendingTextDarkness = v; })
+          .withSubmenu(StrId::STR_READER_OVERRIDES));
+
+  // Helper functions, reading ruler, auto page turn, orientation
+  menuItems.push_back(SettingInfo::Separator(StrId::STR_READER_UTILS));
+  // Auto page turn: ACTION type with custom cycling in onActionSelected
+  menuItems.push_back(SettingInfo::Action(StrId::STR_AUTO_TURN_PAGES_PER_MIN, SettingAction::None));
+
   // --- Synchronisation (only if credentials are set) ---
   if (KOREADER_STORE.hasCredentials()) {
     menuItems.push_back(SettingInfo::Separator(StrId::STR_KOREADER_SYNC));
@@ -158,7 +200,8 @@ EpubReaderMenuActivity::MenuAction EpubReaderMenuActivity::actionForNameId(StrId
 
 void EpubReaderMenuActivity::finishWithAction(MenuAction action) {
   setResult(MenuResult{static_cast<int>(action), pendingOrientation, selectedPageTurnOption,
-                       pendingEmbeddedStyleOverride, pendingImageRenderingOverride, pendingTextDarkness});
+                       pendingEmbeddedStyleOverride, pendingImageRenderingOverride, pendingFontFamilyOverride,
+                       pendingFontSizeOverride, pendingTextDarkness});
   finish();
 }
 
@@ -188,6 +231,8 @@ void EpubReaderMenuActivity::onBackPressed() {
                            selectedPageTurnOption,
                            pendingEmbeddedStyleOverride,
                            pendingImageRenderingOverride,
+                           pendingFontFamilyOverride,
+                           pendingFontSizeOverride,
                            pendingTextDarkness};
   setResult(std::move(result));
   finish();

src/activities/reader/EpubReaderMenuActivity.h

@@ -35,6 +35,7 @@ class EpubReaderMenuActivity final : public MenuListActivity {
                                   const int currentPage, const int totalPages, const int bookProgressPercent,
                                   const uint8_t currentOrientation, const bool hasFootnotes,
                                   const int8_t initialEmbeddedStyleOverride, const int8_t initialImageRenderingOverride,
+                                  const int8_t initialFontFamilyOverride, const int8_t initialFontSizeOverride,
                                   const uint8_t initialTextDarkness, const bool hasStarredPages,
                                   const bool isCurrentPageStarred);
 
@@ -61,6 +62,8 @@ class EpubReaderMenuActivity final : public MenuListActivity {
   uint8_t selectedPageTurnOption = 0;
   int8_t pendingEmbeddedStyleOverride = -1;
   int8_t pendingImageRenderingOverride = -1;
+  int8_t pendingFontFamilyOverride = -1;
+  int8_t pendingFontSizeOverride = -1;
   uint8_t pendingTextDarkness = 1;
 
   static constexpr const char* pageTurnLabels[] = {"", "1", "3", "6", "12"};