Automatically scale imgui text based on display pixel density (#545)

src/Cafe/HW/Latte/Core/LatteOverlay.cpp

@@ -66,11 +66,11 @@ struct OverlayList
 const auto kPopupFlags = ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoNav;
 
 const float kBackgroundAlpha = 0.65f;
-void LatteOverlay_renderOverlay(ImVec2& position, ImVec2& pivot, sint32 direction)
+void LatteOverlay_renderOverlay(ImVec2& position, ImVec2& pivot, sint32 direction, float fontSize, bool pad)
 {
 	auto& config = GetConfig();
-	
+
-	const auto font = ImGui_GetFont(14.0f * (float)config.overlay.text_scale / 100.0f);
+	const auto font = ImGui_GetFont(fontSize);
 	ImGui::PushFont(font);
 
 	const ImVec4 color = ImGui::ColorConvertU32ToFloat4(config.overlay.text_color);
@@ -80,7 +80,7 @@ void LatteOverlay_renderOverlay(ImVec2& position, ImVec2& pivot, sint32 directio
 	{
 		ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 		ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-		if (ImGui::Begin("Stats overlay", nullptr, kPopupFlags))
+		if (ImGui_BeginPadDistinct("Stats overlay", nullptr, kPopupFlags, pad))
 		{
 			if (config.overlay.fps)
 				ImGui::Text("FPS: %.2lf", g_state.fps);
@@ -117,11 +117,11 @@ void LatteOverlay_renderOverlay(ImVec2& position, ImVec2& pivot, sint32 directio
 	ImGui::PopFont();
 }
 
-void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 direction)
+void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 direction, float fontSize, bool pad)
 {
 	auto& config = GetConfig();
 
-	const auto font = ImGui_GetFont(14.0f * (float)config.notification.text_scale / 100.0f);
+	const auto font = ImGui_GetFont(fontSize);
 	ImGui::PushFont(font);
 
 	const ImVec4 color = ImGui::ColorConvertU32ToFloat4(config.notification.text_color);
@@ -141,7 +141,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 				// active account
 				ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 				ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-				if (ImGui::Begin("Active account", nullptr, kPopupFlags))
+				if (ImGui_BeginPadDistinct("Active account", nullptr, kPopupFlags, pad))
 				{
 					ImGui::TextUnformatted((const char*)ICON_FA_USER);
 					ImGui::SameLine();
@@ -179,7 +179,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 				{
 					ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 					ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-					if (ImGui::Begin("Controller profile names", nullptr, kPopupFlags))
+					if (ImGui_BeginPadDistinct("Controller profile names", nullptr, kPopupFlags, pad))
 					{
 						auto it = profiles.cbegin();
 						ImGui::TextUnformatted((const char*)ICON_FA_GAMEPAD);
@@ -227,7 +227,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 		{
 			ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 			ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-			if (ImGui::Begin("Friends overlay", nullptr, kPopupFlags))
+			if (ImGui_BeginPadDistinct("Friends overlay", nullptr, kPopupFlags, pad))
 			{
 				const auto tick = tick_cached();
 				for (auto it = s_friend_list.cbegin(); it != s_friend_list.cend();)
@@ -274,7 +274,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 
 			ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 			ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-			if (ImGui::Begin("Low battery overlay", nullptr, kPopupFlags))
+			if (ImGui_BeginPadDistinct("Low battery overlay", nullptr, kPopupFlags, pad))
 			{
 				auto it = batteries.cbegin();
 				ImGui::TextUnformatted((const char*)(s_blink_state ? ICON_FA_BATTERY_EMPTY : ICON_FA_BATTERY_QUARTER));
@@ -322,7 +322,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 			{
 				ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 				ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-				if (ImGui::Begin("Compiling shaders overlay", nullptr, kPopupFlags))
+				if (ImGui_BeginPadDistinct("Compiling shaders overlay", nullptr, kPopupFlags, pad))
 				{
 					ImRotateStart();
 					ImGui::TextUnformatted((const char*)ICON_FA_SPINNER);
@@ -377,7 +377,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 			{
 				ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 				ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-				if (ImGui::Begin("Compiling pipeline overlay", nullptr, kPopupFlags))
+				if (ImGui_BeginPadDistinct("Compiling pipeline overlay", nullptr, kPopupFlags, pad))
 				{
 					ImRotateStart();
 					ImGui::TextUnformatted((const char*)ICON_FA_SPINNER);
@@ -446,7 +446,7 @@ void LatteOverlay_RenderNotifications(ImVec2& position, ImVec2& pivot, sint32 di
 	{
 		ImGui::SetNextWindowPos(position, ImGuiCond_Always, pivot);
 		ImGui::SetNextWindowBgAlpha(kBackgroundAlpha);
-		if (ImGui::Begin("Misc notifications", nullptr, kPopupFlags))
+		if (ImGui_BeginPadDistinct("Misc notifications", nullptr, kPopupFlags, pad))
 		{
 			const auto tick = tick_cached();
 			for (auto it = s_misc_notifications.cbegin(); it != s_misc_notifications.cend();)
@@ -521,12 +521,18 @@ void LatteOverlay_render(bool pad_view)
 		return;
 
 	const Vector2f window_size{ (float)w,(float)h };
-	
+
+	float fontDPIScale = !pad_view ? gui_getWindowDPIScale() : gui_getPadDPIScale();
+
+	float overlayFontSize = 14.0f * (float)config.overlay.text_scale / 100.0f * fontDPIScale;
+
 	// test if fonts are already precached
-	if (!ImGui_GetFont(14.0f * (float)config.overlay.text_scale / 100.0f))
+	if (!ImGui_GetFont(overlayFontSize))
 		return;
+
+	float notificationsFontSize = 14.0f * (float)config.notification.text_scale / 100.0f * fontDPIScale;
 	
-	if (!ImGui_GetFont(14.0f * (float)config.notification.text_scale / 100.0f))
+	if (!ImGui_GetFont(notificationsFontSize))
 		return;
 
 	ImVec2 position{}, pivot{};
@@ -535,7 +541,7 @@ void LatteOverlay_render(bool pad_view)
 	if (config.overlay.position != ScreenPosition::kDisabled)
 	{
 		LatteOverlay_translateScreenPosition(config.overlay.position, window_size, position, pivot, direction);
-		LatteOverlay_renderOverlay(position, pivot, direction);
+		LatteOverlay_renderOverlay(position, pivot, direction, overlayFontSize, pad_view);
 	}
 	
 
@@ -544,7 +550,7 @@ void LatteOverlay_render(bool pad_view)
 		if(config.overlay.position != config.notification.position)
 			LatteOverlay_translateScreenPosition(config.notification.position, window_size, position, pivot, direction);
 
-		LatteOverlay_RenderNotifications(position, pivot, direction);
+		LatteOverlay_RenderNotifications(position, pivot, direction, notificationsFontSize, pad_view);
 	}
 }
 

src/gui/MainWindow.cpp

@@ -1523,6 +1523,7 @@ void MainWindow::OnSizeEvent(wxSizeEvent& event)
 	g_window_info.height = client_size.GetHeight();
 	g_window_info.phys_width = ToPhys(client_size.GetWidth());
 	g_window_info.phys_height = ToPhys(client_size.GetHeight());
+	g_window_info.dpi_scale = GetDPIScaleFactor();
 
 	if (m_debugger_window && m_debugger_window->IsShown())
 		m_debugger_window->OnParentMove(GetPosition(), event.GetSize());
@@ -1540,6 +1541,7 @@ void MainWindow::OnDPIChangedEvent(wxDPIChangedEvent& event)
 	g_window_info.height = client_size.GetHeight();
 	g_window_info.phys_width = ToPhys(client_size.GetWidth());
 	g_window_info.phys_height = ToPhys(client_size.GetHeight());
+	g_window_info.dpi_scale = GetDPIScaleFactor();
 }
 
 void MainWindow::OnMove(wxMoveEvent& event)

src/gui/PadViewFrame.cpp

@@ -103,6 +103,7 @@ void PadViewFrame::OnSizeEvent(wxSizeEvent& event)
 	g_window_info.pad_height = client_size.GetHeight();
 	g_window_info.phys_pad_width = ToPhys(client_size.GetWidth());
 	g_window_info.phys_pad_height = ToPhys(client_size.GetHeight());
+	g_window_info.pad_dpi_scale = GetDPIScaleFactor();
 
 	event.Skip();
 }
@@ -115,6 +116,7 @@ void PadViewFrame::OnDPIChangedEvent(wxDPIChangedEvent& event)
 	g_window_info.pad_height = client_size.GetHeight();
 	g_window_info.phys_pad_width = ToPhys(client_size.GetWidth());
 	g_window_info.phys_pad_height = ToPhys(client_size.GetHeight());
+	g_window_info.pad_dpi_scale = GetDPIScaleFactor();
 }
 
 void PadViewFrame::OnMoveEvent(wxMoveEvent& event)

src/gui/guiWrapper.cpp

@@ -143,7 +143,6 @@ void gui_getWindowSize(int& w, int& h)
 	h = g_window_info.height;
 }
 
-
 void gui_getPadWindowSize(int& w, int& h)
 {
 	if (g_window_info.pad_open)
@@ -178,6 +177,16 @@ void gui_getPadWindowPhysSize(int& w, int& h)
 	}
 }
 
+double gui_getWindowDPIScale()
+{
+	return g_window_info.dpi_scale;
+}
+
+double gui_getPadDPIScale()
+{
+	return g_window_info.pad_open ? g_window_info.pad_dpi_scale.load() : 1.0;
+}
+
 bool gui_isPadWindowOpen()
 {
 	return g_window_info.pad_open;

src/gui/guiWrapper.h

@@ -57,10 +57,12 @@ struct WindowInfo
 
 	std::atomic_int32_t width, height; 	// client size of main window
 	std::atomic_int32_t phys_width, phys_height; 	// client size of main window in physical pixels
+	std::atomic<double> dpi_scale;
 
 	std::atomic_bool pad_open; // if separate pad view is open
 	std::atomic_int32_t pad_width, pad_height; 	// client size of pad window
 	std::atomic_int32_t phys_pad_width, phys_pad_height; 	// client size of pad window in physical pixels
+	std::atomic<double> pad_dpi_scale;
 
 	std::atomic_bool pad_maximized = false;
 	std::atomic_int32_t restored_pad_x = -1, restored_pad_y = -1;
@@ -118,6 +120,8 @@ void gui_getWindowSize(int& w, int& h);
 void gui_getPadWindowSize(int& w, int& h);
 void gui_getWindowPhysSize(int& w, int& h);
 void gui_getPadWindowPhysSize(int& w, int& h);
+double gui_getWindowDPIScale();
+double gui_getPadDPIScale();
 bool gui_isPadWindowOpen();
 bool gui_isKeyDown(uint32 key);
 bool gui_isKeyDown(PlatformKeyCodes key);

src/imgui/imgui_extension.cpp

@@ -50,6 +50,14 @@ extern char const g_fontawesome_data[];
 std::unordered_map<int, ImFont*> g_imgui_fonts;
 std::stack<int> g_font_requests;
 
+bool ImGui_BeginPadDistinct(const char* name, bool* p_open, ImGuiWindowFlags flags, bool pad)
+{
+	std::string distinctName = name;
+	if (pad)
+		distinctName += "##pad";
+	return ImGui::Begin(distinctName.c_str(), p_open, flags);
+}
+
 void ImGui_PrecacheFonts()
 {
 	while (!g_font_requests.empty())

src/imgui/imgui_extension.h

@@ -9,6 +9,8 @@ inline ImVec2 operator-(const ImVec2& l, const ImVec2& r) { return{ l.x - r.x, l
 inline bool operator<(const ImVec2& lhs, const ImVec2& rhs) { return lhs.x < rhs.x; }
 inline bool operator>=(const ImVec2& lhs, const ImVec2& rhs) { return lhs.x >= rhs.x; }
 
+bool ImGui_BeginPadDistinct(const char* name, bool* p_open, ImGuiWindowFlags flags, bool pad);
+
 void ImGui_PrecacheFonts();
 ImFont* ImGui_GetFont(float size);
 void ImGui_UpdateWindowInformation(bool mainWindow);