Option in settings for window decorations

src/lang/english.txt

@@ -1222,6 +1222,8 @@ STR_CONFIG_SETTING_BUILD_CONFIRMATION                           :{BLACK}Confirm
 STR_CONFIG_SETTING_BUILD_CONFIRMATION_HELPTEXT                  :{BLACK}Show confirmation dialog when building roads and stations
 STR_CONFIG_SETTING_WINDOWS_TITLEBARS                            :{BLACK}Title bars
 STR_CONFIG_SETTING_WINDOWS_TITLEBARS_HELPTEXT                   :{BLACK}Show title bars for all windows, or hide them to save screen space
+STR_CONFIG_SETTING_WINDOWS_DECORATIONS                          :{BLACK}Window decorations
+STR_CONFIG_SETTING_WINDOWS_DECORATIONS_HELPTEXT                 :{BLACK}Ornaments on window edges
 STR_CONFIG_SETTING_VIDEO_8BPP                                   :{BLACK}8 bit
 STR_CONFIG_SETTING_VIDEO_8BPP_HELPTEXT                          :{BLACK}Set video color depth to 8 bits per pixel, this video mode supports water animation
 STR_CONFIG_SETTING_VIDEO_16BPP                                  :{BLACK}16 bit

src/settings_gui.cpp

@@ -1651,6 +1651,7 @@ static SettingsContainer &GetSettingsTree()
 			interface->Add(new SettingEntry("gui.vertical_toolbar"));
 			interface->Add(new SettingEntry("gui.build_confirmation"));
 			interface->Add(new SettingEntry("gui.windows_titlebars"));
+			interface->Add(new SettingEntry("gui.windows_decorations"));
 			interface->Add(new SettingEntry("gui.toolbar_pos"));
 			interface->Add(new SettingEntry("gui.statusbar_pos"));
 			interface->Add(new SettingEntry("gui.prefer_teamchat"));

src/settings_type.h

@@ -80,6 +80,7 @@ struct GUISettings {
 	bool   vertical_toolbar;                 ///< main toolbar is split into two vertical toolbars
 	bool   build_confirmation;               ///< show confirmation dialog when building roads and stations
 	bool   windows_titlebars;                ///< show or hide titlebars for all windows to increase scrren space
+	bool   windows_decorations;              ///< draw ornament on all window edges
 	uint   min_button;                       ///< min size of most button widgets
 	uint   min_step;                         ///< min size of scrollbar/dropdown elements
 	bool   show_finances;                    ///< show finances at end of year

src/table/settings.ini

@@ -2574,6 +2574,14 @@ str      = STR_CONFIG_SETTING_WINDOWS_TITLEBARS
 strhelp  = STR_CONFIG_SETTING_WINDOWS_TITLEBARS_HELPTEXT
 cat      = SC_BASIC
 
+[SDTC_BOOL]
+var      = gui.windows_decorations
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+str      = STR_CONFIG_SETTING_WINDOWS_DECORATIONS
+strhelp  = STR_CONFIG_SETTING_WINDOWS_DECORATIONS_HELPTEXT
+cat      = SC_BASIC
+
 [SDTC_BOOL]
 var      = gui.show_finances
 flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC

src/widget.cpp

@@ -900,7 +900,8 @@ void NWidgetCore::DrawEdgeOrnament(const Window *w) const
 		w->window_class == WC_BUILD_CONFIRMATION ||
 		w->window_class == WC_STATUS_BAR ||
 		w->window_class == WC_TOOLTIPS ||
-		w->window_class == WC_DROPDOWN_MENU) {
+		w->window_class == WC_DROPDOWN_MENU ||
+		!_settings_client.gui.windows_decorations) {
 		return;
 	}
 	if (this->pos_x == 0) {