Add firmware font size setting

Tactility/Source/settings/DisplaySettings.cpp

@@ -17,6 +17,7 @@ static std::string getSettingsFilePath() {
 }
 
 constexpr auto* SETTINGS_KEY_ORIENTATION = "orientation";
+constexpr auto* SETTINGS_KEY_FONT_SIZE = "fontSize";
 constexpr auto* SETTINGS_KEY_GAMMA_CURVE = "gammaCurve";
 constexpr auto* SETTINGS_KEY_BACKLIGHT_DUTY = "backlightDuty";
 constexpr auto* SETTINGS_KEY_TIMEOUT_ENABLED = "backlightTimeoutEnabled";
@@ -71,6 +72,34 @@ static bool fromString(const std::string& str, Orientation& orientation) {
     }
 }
 
+static std::string toString(FontSize font_size) {
+    switch (font_size) {
+        using enum FontSize;
+        case Small:
+            return "Small";
+        case Default:
+            return "Default";
+        case Large:
+            return "Large";
+        default:
+            std::unreachable();
+    }
+}
+
+static bool fromString(const std::string& str, FontSize& font_size) {
+    if (str == "Small") {
+        font_size = FontSize::Small;
+        return true;
+    } else if (str == "Default") {
+        font_size = FontSize::Default;
+        return true;
+    } else if (str == "Large") {
+        font_size = FontSize::Large;
+        return true;
+    }
+    return false;
+}
+
 static std::string toString(ScreensaverType type) {
     switch (type) {
         using enum ScreensaverType;
@@ -132,6 +161,12 @@ bool load(DisplaySettings& settings) {
         orientation = getDefaultOrientation();
     }
 
+    auto font_size_entry = map.find(SETTINGS_KEY_FONT_SIZE);
+    FontSize font_size = FontSize::Default;
+    if (font_size_entry != map.end()) {
+        fromString(font_size_entry->second, font_size);
+    }
+
     auto gamma_entry = map.find(SETTINGS_KEY_GAMMA_CURVE);
     int gamma_curve = 0;
     if (gamma_entry != map.end()) {
@@ -172,6 +207,7 @@ bool load(DisplaySettings& settings) {
     }
 
     settings.orientation = orientation;
+    settings.fontSize = font_size;
     settings.gammaCurve = gamma_curve;
     settings.backlightDuty = backlight_duty;
     settings.backlightTimeoutEnabled = timeout_enabled;
@@ -185,6 +221,7 @@ bool load(DisplaySettings& settings) {
 DisplaySettings getDefault() {
     return DisplaySettings {
         .orientation = getDefaultOrientation(),
+        .fontSize = FontSize::Default,
         .gammaCurve = 1,
         .backlightDuty = 200,
         .backlightTimeoutEnabled = false,
@@ -207,6 +244,7 @@ bool save(const DisplaySettings& settings) {
     map[SETTINGS_KEY_BACKLIGHT_DUTY] = std::to_string(settings.backlightDuty);
     map[SETTINGS_KEY_GAMMA_CURVE] = std::to_string(settings.gammaCurve);
     map[SETTINGS_KEY_ORIENTATION] = toString(settings.orientation);
+    map[SETTINGS_KEY_FONT_SIZE] = toString(settings.fontSize);
     map[SETTINGS_KEY_TIMEOUT_ENABLED] = settings.backlightTimeoutEnabled ? "1" : "0";
     map[SETTINGS_KEY_TIMEOUT_MS] = std::to_string(settings.backlightTimeoutMs);
     map[SETTINGS_KEY_SCREENSAVER_TYPE] = toString(settings.screensaverType);