Initial attempt at paintClip UI

Compiles but untested.

NOT INTENDED FOR MERGING

data/language/en-GB.txt

@@ -4311,6 +4311,11 @@ STR_5999    :Set money
 STR_6000    :Enter new value
 STR_6001    :Enable lighting effects (experimental)
 STR_6002    :{SMALLFONT}{BLACK}Lamps and rides will be lit up at night.{NEWLINE}Requires rendering engine to be set to hardware display.
+STR_6003    :View Clipping
+STR_6004    :Enable clipping by height
+STR_6005    :Height clipping only displays map elements below the clip height
+STR_6006    :Clip height
+STR_6007    :Select clip height
 
 #############
 # Scenarios #

src/openrct2/interface/window.h

@@ -471,6 +471,7 @@ enum {
 	WC_SERVER_START = 128,
 	WC_CUSTOM_CURRENCY_CONFIG = 129,
 	WC_DEBUG_PAINT = 130,
+	WC_VIEW_CLIPPING = 131,
 
 	// Only used for colour schemes
 	WC_STAFF = 220,
@@ -726,6 +727,9 @@ void window_editor_inventions_list_open();
 void window_editor_scenario_options_open();
 void window_editor_objective_options_open();
 
+void window_view_clipping_open();
+void window_view_clipping_close();
+
 void window_guest_list_init_vars_a();
 void window_guest_list_init_vars_b();
 void window_bubble_list_item(rct_window* w, sint32 item_position);

src/openrct2/localisation/string_ids.h

@@ -3654,6 +3654,12 @@ enum {
 	STR_ENABLE_LIGHTING_EFFECTS = 6001,
 	STR_ENABLE_LIGHTING_EFFECTS_TIP = 6002,
 
+	STR_VIEW_CLIPPING = 6003,
+	STR_VIEW_CLIPPING_HEIGHT_ENABLE = 6004,
+	STR_VIEW_CLIPPING_HEIGHT_ENABLE_TIP = 6005,
+	STR_VIEW_CLIPPING_HEIGHT_VALUE = 6006,
+	STR_VIEW_CLIPPING_HEIGHT_SCROLL_TIP = 6007,
+
 	// Have to include resource strings (from scenarios and objects) for the time being now that language is partially working
 	STR_COUNT = 32768
 };

src/openrct2/paint/paint.c

@@ -25,6 +25,7 @@
 
 // zax: globals for paint clipping height
 uint8 gClipHeight = 255;
+bool gClipHeightEnable = false;
 
 const uint32 construction_markers[] = {
 	COLOUR_DARK_GREEN << 19 | COLOUR_GREY << 24 | IMAGE_TYPE_REMAP, // White

src/openrct2/paint/paint.h

@@ -25,6 +25,7 @@
 
 // zax: Global paint clipping height.
 extern uint8 gClipHeight;
+extern bool gClipHeightEnable;
 
 typedef struct attached_paint_struct attached_paint_struct;
 typedef struct paint_struct paint_struct;

src/openrct2/windows/themes.c

@@ -245,6 +245,7 @@ static rct_windowclass window_themes_tab_6_classes[] = {
 	WC_MULTIPLAYER,
 	WC_PLAYER,
 	WC_CHAT,
+	WC_VIEW_CLIPPING,
 };
 
 static rct_windowclass window_themes_tab_7_classes[] = {

src/openrct2/windows/top_toolbar.c

@@ -98,6 +98,7 @@ typedef enum {
 	DDIDX_LAND_HEIGHTS = 10,
 	DDIDX_TRACK_HEIGHTS = 11,
 	DDIDX_PATH_HEIGHTS = 12,
+	DDIDX_VIEW_CLIPPING = 13,
 } TOP_TOOLBAR_VIEW_MENU_DDIDX;
 
 typedef enum {
@@ -3044,6 +3045,7 @@ void top_toolbar_init_view_menu(rct_window* w, rct_widget* widget) {
 	gDropdownItemsFormat[10] = STR_TOGGLE_OPTION;
 	gDropdownItemsFormat[11] = STR_TOGGLE_OPTION;
 	gDropdownItemsFormat[12] = STR_TOGGLE_OPTION;
+	gDropdownItemsFormat[13] = STR_TOGGLE_OPTION;
 
 	gDropdownItemsArgs[0] = STR_UNDERGROUND_VIEW;
 	gDropdownItemsArgs[1] = STR_REMOVE_BASE_LAND;
@@ -3056,6 +3058,7 @@ void top_toolbar_init_view_menu(rct_window* w, rct_widget* widget) {
 	gDropdownItemsArgs[10] = STR_HEIGHT_MARKS_ON_LAND;
 	gDropdownItemsArgs[11] = STR_HEIGHT_MARKS_ON_RIDE_TRACKS;
 	gDropdownItemsArgs[12] = STR_HEIGHT_MARKS_ON_PATHS;
+	gDropdownItemsArgs[13] = STR_VIEW_CLIPPING;
 
 	window_dropdown_show_text(
 		w->x + widget->left,
@@ -3090,6 +3093,8 @@ void top_toolbar_init_view_menu(rct_window* w, rct_widget* widget) {
 		dropdown_set_checked(11, true);
 	if (mainViewport->flags & VIEWPORT_FLAG_PATH_HEIGHTS)
 		dropdown_set_checked(12, true);
+	if (mainViewport->flags & VIEWPORT_FLAG_PAINT_CLIP_TO_HEIGHT)
+		dropdown_set_checked(13, true);
 
 	gDropdownDefaultIndex = DDIDX_UNDERGROUND_INSIDE;
 }
@@ -3136,6 +3141,14 @@ void top_toolbar_view_menu_dropdown(sint16 dropdownIndex)
 		case DDIDX_PATH_HEIGHTS:
 			w->viewport->flags ^= VIEWPORT_FLAG_PATH_HEIGHTS;
 			break;
+		case DDIDX_VIEW_CLIPPING:
+			if ((w->viewport->flags & VIEWPORT_FLAG_PAINT_CLIP_TO_HEIGHT) == 0) {
+				window_view_clipping_open();
+			}
+			else {
+				window_view_clipping_close();
+			}
+			break;
 		default:
 			return;
 		}