[studio,turbine] Add pre-draw font loading

src/olympic/studio/applib/src/app.cpp

@@ -74,6 +74,10 @@ class StudioUIDrawer: public turbine::gl::Drawer {
 		explicit StudioUIDrawer(StudioUI &ui) noexcept: m_ui(ui) {
 		}
 
+		void preDraw(turbine::Context &) noexcept final {
+			m_ui.preDraw();
+		}
+
 		void draw(turbine::Context&) noexcept final {
 			m_ui.draw();
 		}

src/olympic/studio/applib/src/studioui.cpp

@@ -121,7 +121,6 @@ using StudioConfig = StudioConfigV2;
 StudioUI::StudioUI(turbine::Context &tctx, ox::StringParam projectDataDir) noexcept:
 		m_sctx{*this, tctx},
 		m_projectDataDir{std::move(projectDataDir)} {
-	loadFont();
 	auto &kctx = keelCtx(m_tctx);
 	kctx.converters.emplace_back(keel::Converter::make<convertStudioConfigV1ToStudioConfigV2>());
 	oxLogError(headerizeConfigFile<StudioConfigV1>(kctx));
@@ -184,11 +183,14 @@ void StudioUI::handleNavigationChange(ox::StringParam path, ox::StringParam navA
 	m_navAction.emplace(std::move(path), std::move(navArgs));
 }
 
+void StudioUI::preDraw() noexcept {
+	loadFont();
+}
+
 void StudioUI::draw() noexcept {
 	if (turbine::isWayland() || ox::defines::OS == ox::OS::Darwin) {
 		ig::setDpiScale(1.f);
 	} else {
-		loadFont();
 		ig::setDpiScale(ImGui::GetWindowDpiScale());
 	}
 	glutils::clearScreen();

src/olympic/studio/applib/src/studioui.hpp

@@ -103,6 +103,8 @@ class StudioUI final: public ox::SignalHandler {
 		bool handleShutdown() noexcept;
 
 	protected:
+		void preDraw() noexcept;
+
 		void draw() noexcept;
 
 	private:

src/olympic/turbine/include/turbine/gfx.hpp

@@ -18,6 +18,7 @@ namespace gl {
 class Drawer {
 	public:
 		virtual ~Drawer() = default;
+		virtual void preDraw(Context&) noexcept {}
 		virtual void draw(Context&) noexcept = 0;
 };
 void addDrawer(Context &ctx, Drawer *cd) noexcept;

src/olympic/turbine/src/glfw/turbine.cpp

@@ -235,12 +235,15 @@ void requireRefreshFor(Context &ctx, int ms) noexcept {
 
 static void draw(Context &ctx) noexcept {
 	// draw start
+	for (auto const d : ctx.drawers) {
+		d->preDraw(ctx);
+	}
 #if TURBINE_USE_IMGUI
 	ImGui_ImplOpenGL3_NewFrame();
 	ImGui_ImplGlfw_NewFrame();
 	ImGui::NewFrame();
 #endif
-	for (auto d : ctx.drawers) {
+	for (auto const d : ctx.drawers) {
 		d->draw(ctx);
 	}
 #if TURBINE_USE_IMGUI
@@ -489,7 +492,9 @@ KeyEventHandler keyEventHandler(Context const &ctx) noexcept {
 }
 
 float scale(Context const &ctx) noexcept {
-	return ctx.scale;
+	float x{}, y{};
+	glfwGetWindowContentScale(ctx.window, &x, &y);
+	return y;
 }
 
 bool isWayland() noexcept {