impr: Better font scaling with larger backing scale factors

main/gui/source/window/web_window.cpp

@@ -8,6 +8,7 @@
 #include <hex/api/events/events_gui.hpp>
 #include <hex/api/events/events_interaction.hpp>
 #include <hex/api/events/requests_gui.hpp>
+#include <hex/api/theme_manager.hpp>
 
 #include <imgui.h>
 #include <imgui_internal.h>
@@ -154,6 +155,27 @@ namespace hex {
     }
 
     void Window::endNativeWindowFrame() {
+        static float prevScaleFactor = 0;
+
+        const float currScaleFactor = MAIN_THREAD_EM_ASM_DOUBLE({
+            try {
+                // Take square root of scaling to counter scaling applied by Browser
+                return Math.sqrt(window.devicePixelRatio);
+            } catch (e) {
+                return 1.0;
+            }
+        });
+        if (prevScaleFactor != 0 && prevScaleFactor != currScaleFactor) {
+            EventDPIChanged::post(prevScaleFactor, currScaleFactor);
+            resizeCanvas();
+
+            ImHexApi::System::impl::setNativeScale(currScaleFactor);
+
+            ThemeManager::reapplyCurrentTheme();
+            ImGui::GetStyle().ScaleAllSizes(currScaleFactor);
+        }
+
+        prevScaleFactor = currScaleFactor;
     }
 
 }

main/gui/source/window/win_window.cpp

@@ -1,13 +1,12 @@
-#include <hex/api/content_registry.hpp>
-#include <hex/api/theme_manager.hpp>
-
 #include "window.hpp"
 
-
 #if defined(OS_WINDOWS)
 
     #include "messaging.hpp"
 
+    #include <hex/api/content_registry.hpp>
+    #include <hex/api/theme_manager.hpp>
+
     #include <hex/helpers/utils.hpp>
     #include <hex/helpers/logger.hpp>
     #include <hex/helpers/default_paths.hpp>

main/gui/source/window/window.cpp

@@ -813,8 +813,6 @@ namespace hex {
         // NOTE: This needs to be done before a new frame is started, otherwise ImGui won't handle docking correctly
         LayoutManager::process();
         WorkspaceManager::process();
-
-        ImGui::GetIO().FontGlobalScale = 1.0F / ImHexApi::System::getBackingScaleFactor();
     }
 
     void Window::drawImGui() {