ui: show render scale and screen resolution to about window

ui/xemu.c

@@ -198,6 +198,11 @@ void sdl2_window_resize(struct sdl2_console *scon)
                       surface_height(scon->surface));
 }
 
+void xemu_get_window_size(int *width, int *height)
+{
+    SDL_GetWindowSize(m_window, width, height);
+}
+
 static void sdl2_redraw(struct sdl2_console *scon)
 {
     if (scon->opengl) {

ui/xui/main-menu.cc

@@ -843,10 +843,16 @@ void MainMenuAboutView::Draw()
         const char *gl_vendor = (const char*)glGetString(GL_VENDOR);
         sys_info_text = g_strdup_printf(
             "CPU:          %s\nOS Platform:  %s\nOS Version:   %s\nManufacturer: %s\n"
-            "GPU Model:    %s\nDriver:       %s\nShader:       %s",
+            "GPU Model:    %s\nDriver:       %s\nShader:       %s\n",
              xemu_get_cpu_info(), xemu_get_os_platform(), xemu_get_os_info(), gl_vendor,
              gl_renderer, gl_version, gl_shader_version);
     }
+    int width = 0, height = 0;
+    xemu_get_window_size(&width, &height);
+
+    char *content = g_strdup_printf("%sScaling:      %dx\nResolution:   %dx%d\nDisplay Mode: %s", 
+                                    sys_info_text, nv2a_get_surface_scale_factor(), 
+                                    width, height, g_ui_display_mode_name[g_config.display.ui.fit]);
 
     if (m_config_info_text == NULL) {
         UpdateConfigInfoText();
@@ -864,11 +870,12 @@ void MainMenuAboutView::Draw()
 
     SectionTitle("System Information");
     ImGui::PushFont(g_font_mgr.m_fixed_width_font);
-    ImGui::InputTextMultiline("###systeminformation", (char *)sys_info_text,
-                              strlen(sys_info_text),
-                              ImVec2(-FLT_MIN, ImGui::GetTextLineHeight() * 8),
+    ImGui::InputTextMultiline("###systeminformation", content,
+                              strlen(content),
+                              ImVec2(-FLT_MIN, ImGui::GetTextLineHeight() * 11),
                               ImGuiInputTextFlags_ReadOnly);
     ImGui::PopFont();
+    g_free(content);
 
     SectionTitle("Config Information");
     ImGui::PushFont(g_font_mgr.m_fixed_width_font);

ui/xui/misc.hh

@@ -28,6 +28,8 @@ extern "C" {
 #include <noc_file_dialog.h>
 }
 
+extern const char *g_ui_display_mode_name[];
+
 static inline
 bool IsNavInputPressed(ImGuiNavInput i) {
     ImGuiIO &io = ImGui::GetIO();

ui/xui/popup-menu.cc

@@ -36,6 +36,7 @@ void PopupMenuItemDelegate::LostFocus() {}
 void PopupMenuItemDelegate::PushFocus() {}
 void PopupMenuItemDelegate::PopFocus() {}
 bool PopupMenuItemDelegate::DidPop() { return false; }
+const char *g_ui_display_mode_name[] = {"Center", "Scale", "Scale (Widescreen 16:9)", "Scale (4:3)", "Stretch"};
 
 bool PopupMenuButton(std::string text, std::string icon = "")
 {
@@ -252,16 +253,13 @@ bool PopupMenu::DrawItems(PopupMenuItemDelegate &nav)
 
 class DisplayModePopupMenu : public virtual PopupMenu {
 public:
+
     bool DrawItems(PopupMenuItemDelegate &nav) override
     {
-        const char *values[] = {
-            "Center", "Scale", "Scale (Widescreen 16:9)", "Scale (4:3)", "Stretch"
-        };
-
         for (int i = 0; i < CONFIG_DISPLAY_UI_FIT__COUNT; i++) {
             bool selected = g_config.display.ui.fit == i;
             if (m_focus && selected) ImGui::SetKeyboardFocusHere();
-            if (PopupMenuCheck(values[i], "", selected))
+            if (PopupMenuCheck(g_ui_display_mode_name[i], "", selected))
                 g_config.display.ui.fit = i;
         }
 

ui/xui/xemu-hud.h

@@ -35,6 +35,7 @@ void xemu_monitor_init(void);
 void xemu_toggle_fullscreen(void);
 void xemu_eject_disc(void);
 void xemu_load_disc(const char *path);
+void xemu_get_window_size(int *width, int *height);
 
 // Implemented in xemu_hud.cc
 void xemu_hud_init(SDL_Window *window, void *sdl_gl_context);