Add bold, italic and monospace font styling for HUD text elements (#11478)

Co-authored-by: Elias Fleckenstein <eliasfleckenstein@web.de>

games/devtest/mods/testhud/init.lua

@@ -0,0 +1,81 @@
+local player_huds = {}
+
+local states = {
+	{0, "Normal font"},
+	{1, "Bold font"},
+	{2, "Italic font"},
+	{3, "Bold and italic font"},
+	{4, "Monospace font"},
+	{5, "Bold and monospace font"},
+	{7, "ZOMG all the font styles"},
+}
+
+
+local default_def = {
+	hud_elem_type = "text",
+	position = {x = 0.5, y = 0.5},
+	scale = {x = 2, y = 2},
+	alignment = { x = 0, y = 0 },
+}
+
+local function add_hud(player, state)
+	local def = table.copy(default_def)
+	local statetbl = states[state]
+	def.offset = {x = 0, y = 32 * state}
+	def.style = statetbl[1]
+	def.text = statetbl[2]
+	return player:hud_add(def)
+end
+
+minetest.register_on_leaveplayer(function(player)
+	player_huds[player:get_player_name()] = nil
+end)
+
+local etime = 0
+local state = 0
+
+minetest.register_globalstep(function(dtime)
+	etime = etime + dtime
+	if etime < 1 then
+		return
+	end
+	etime = 0
+	for _, player in ipairs(minetest.get_connected_players()) do
+		local huds = player_huds[player:get_player_name()]
+		if huds then
+			for i, hud_id in ipairs(huds) do
+				local statetbl = states[(state + i) % #states + 1]
+				player:hud_change(hud_id, "style", statetbl[1])
+				player:hud_change(hud_id, "text", statetbl[2])
+			end
+		end
+	end
+	state = state + 1
+end)
+
+minetest.register_chatcommand("hudfonts", {
+	params = "",
+	description = "Show/Hide some text on the HUD with various font options",
+	func = function(name, param)
+		local player = minetest.get_player_by_name(name)
+		local param = tonumber(param) or 0
+		param = math.min(math.max(param, 1), #states)
+		if player_huds[name] == nil then
+			player_huds[name] = {}
+			for i = 1, param do
+				table.insert(player_huds[name], add_hud(player, i))
+			end
+			minetest.chat_send_player(name, ("%d HUD element(s) added."):format(param))
+		else
+			local huds = player_huds[name]
+			if huds then
+				for _, hud_id in ipairs(huds) do
+					player:hud_remove(hud_id)
+				end
+				minetest.chat_send_player(name, "All HUD elements removed.")
+			end
+			player_huds[name] = nil
+		end
+		return true
+	end,
+})

games/devtest/mods/testhud/mod.conf

@@ -0,0 +1,2 @@
+name = testhud
+description = For testing HUD functionality