bump minimum engine ver

Add use_texture_alpha = "clip" for standard signs.
Break Minetest 5.4< compatibility.

api.lua

@@ -155,6 +155,7 @@ signs_lib.flip_walldir = {
 
 -- Initialize character texture cache
 local ctexcache = {}
+local ctexcache_wide = {}
 
 -- entity handling
 
@@ -251,7 +252,10 @@ function signs_lib.set_obj_text(pos, text)
 	local text_ansi = Utf8ToAnsi(text)
 	local n = minetest.registered_nodes[minetest.get_node(pos).name]
 	signs_lib.delete_objects(pos)
+	-- only create sign entity for actual text
+	if text_ansi and text_ansi ~= "" then
 		signs_lib.spawn_entity(pos, signs_lib.make_sign_texture(split(text_ansi), pos) )
+	end
 end
 
 -- rotation
@@ -330,8 +334,10 @@ end
 local TP = signs_lib.path .. "/textures"
 -- Font file formatter
 local CHAR_FILE = "%s_%02x.png"
+local CHAR_FILE_WIDE = "%s_%s.png"
 -- Fonts path
 local CHAR_PATH = TP .. "/" .. CHAR_FILE
+local CHAR_PATH_WIDE = TP .. "/" .. CHAR_FILE_WIDE
 
 -- Lots of overkill here. KISS advocates, go away, shoo! ;) -- kaeza
 
@@ -391,6 +397,7 @@ end
 local function build_char_db(font_size)
 
 	local cw = {}
+	local cw_wide = {}
 
 	-- To calculate average char width.
 	local total_width = 0
@@ -406,20 +413,32 @@ local function build_char_db(font_size)
 		end
 	end
 
+	for i = 1, #signs_lib.wide_character_codes do
+		local ch = signs_lib.wide_character_codes[i]
+		local w, h = signs_lib.read_image_size(CHAR_PATH_WIDE:format("signs_lib_font_"..font_size.."px", ch))
+		if w and h then
+			cw_wide[ch] = w
+			total_width = total_width + w
+			char_count = char_count + 1
+		end
+	end
+
 	local cbw, cbh = signs_lib.read_image_size(TP.."/signs_lib_color_"..font_size.."px_n.png")
 	assert(cbw and cbh, "error reading bg dimensions")
-	return cw, cbw, cbh, (total_width / char_count)
+	return cw, cbw, cbh, (total_width / char_count), cw_wide
 end
 
 signs_lib.charwidth15,
 signs_lib.colorbgw15,
 signs_lib.lineheight15,
-signs_lib.avgwidth15 = build_char_db(15)
+signs_lib.avgwidth15,
+signs_lib.charwidth_wide15 = build_char_db(15)
 
 signs_lib.charwidth31,
 signs_lib.colorbgw31,
 signs_lib.lineheight31,
-signs_lib.avgwidth31 = build_char_db(31)
+signs_lib.avgwidth31,
+signs_lib.charwidth_wide31 = build_char_db(31)
 
 local sign_groups = {choppy=2, dig_immediate=2}
 local fences_with_sign = { }
@@ -455,7 +474,22 @@ local function char_tex(font_name, ch)
 	end
 end
 
-local function make_line_texture(line, lineno, pos, line_width, line_height, cwidth_tab, font_size, colorbgw)
+local function char_tex_wide(font_name, ch)
+	if ctexcache_wide[font_name..ch] then
+		return ctexcache_wide[font_name..ch], true
+	else
+		local exists, tex = file_exists(CHAR_PATH_WIDE:format(font_name, ch))
+		if exists then
+			tex = CHAR_FILE_WIDE:format(font_name, ch)
+		else
+			tex = CHAR_FILE:format(font_name, 0x5f)
+		end
+		ctexcache_wide[font_name..ch] = tex
+		return tex, exists
+	end
+end
+
+local function make_line_texture(line, lineno, pos, line_width, line_height, cwidth_tab, font_size, colorbgw, cwidth_tab_wide)
 	local width = 0
 	local maxw = 0
 	local font_name = "signs_lib_font_"..font_size.."px"
@@ -492,6 +526,27 @@ local function make_line_texture(line, lineno, pos, line_width, line_height, cwi
 		local word_l = #word
 		local i = 1
 		while i <= word_l  do
+			local wide_c
+			if "&#x" == word:sub(i, i + 2) then
+				local j = i + 3
+				local collected = ""
+				while j <= word_l do
+					local c = word:sub(j, j)
+					if c == ";" then
+						wide_c = collected
+						break
+					elseif c < "0" then
+						break
+					elseif "f" < c then
+						break
+					elseif ("9" < c) and (c < "a") then
+						break
+					else
+						collected = collected .. c
+						j = j + 1
+					end
+				end
+			end
 			local c = word:sub(i, i)
 			if c == "#" then
 				local cc = tonumber(word:sub(i+1, i+1), 16)
@@ -499,6 +554,25 @@ local function make_line_texture(line, lineno, pos, line_width, line_height, cwi
 					i = i + 1
 					cur_color = cc
 				end
+			elseif wide_c then
+				local w = cwidth_tab_wide[wide_c]
+				if w then
+					width = width + w + 1
+					if width >= (line_width - cwidth_tab[" "]) then
+						width = 0
+					else
+						maxw = math_max(width, maxw)
+					end
+					if #chars < MAX_INPUT_CHARS then
+						table.insert(chars, {
+							off = ch_offs,
+							tex = char_tex_wide(font_name, wide_c),
+							col = ("%X"):format(cur_color),
+						})
+					end
+					ch_offs = ch_offs + w
+				end
+				i = i + #wide_c + 3
 			else
 				local w = cwidth_tab[c]
 				if w then
@@ -578,6 +652,7 @@ function signs_lib.make_sign_texture(lines, pos)
 	local line_width
 	local line_height
 	local char_width
+	local char_width_wide
 	local colorbgw
 	local widemult = 1
 
@@ -590,12 +665,14 @@ function signs_lib.make_sign_texture(lines, pos)
 		line_width = math.floor(signs_lib.avgwidth31 * def.chars_per_line) * (def.horiz_scaling * widemult)
 		line_height = signs_lib.lineheight31
 		char_width = signs_lib.charwidth31
+		char_width_wide = signs_lib.charwidth_wide31
 		colorbgw = signs_lib.colorbgw31
 	else
 		font_size = 15
 		line_width = math.floor(signs_lib.avgwidth15 * def.chars_per_line) * (def.horiz_scaling * widemult)
 		line_height = signs_lib.lineheight15
 		char_width = signs_lib.charwidth15
+		char_width_wide = signs_lib.charwidth_wide15
 		colorbgw = signs_lib.colorbgw15
 	end
 
@@ -604,7 +681,7 @@ function signs_lib.make_sign_texture(lines, pos)
 	local lineno = 0
 	for i = 1, #lines do
 		if lineno >= def.number_of_lines then break end
-		local linetex, ln = make_line_texture(lines[i], lineno, pos, line_width, line_height, char_width, font_size, colorbgw)
+		local linetex, ln = make_line_texture(lines[i], lineno, pos, line_width, line_height, char_width, font_size, colorbgw, char_width_wide)
 		table.insert(texture, linetex)
 		lineno = ln + 1
 	end

depends.txt

@@ -1,7 +0,0 @@
-default
-intllib?
-screwdriver?
-streetspoles?
-streetlamps?
-cottages?
-prefab_redo?

description.txt

@@ -1 +0,0 @@
-Adds signs with readable text.

encoding.lua

@@ -203,6 +203,32 @@ local utf8_decode = {
 	[210] = {[144] = "\165", [145] = "\180"}
 }
 
+local wide_character_codes = {
+}
+
+signs_lib.unicode_install = function(
+	numbers
+)
+	local scope = utf8_decode
+	for i = 1,#numbers-2 do
+		if not scope[numbers[i]] then
+			scope[numbers[i]] = {}
+		end
+		scope = scope[numbers[i]]
+	end
+	scope[numbers[#numbers-1]] = "&#x" .. numbers[#numbers] .. ";"
+	table.insert(
+		wide_character_codes,
+		numbers[#numbers]
+	)
+end
+
+signs_lib.unicode_install({38,"26"})
+
+dofile(signs_lib.path.."/nonascii-de.lua")
+dofile(signs_lib.path.."/nonascii-fr.lua")
+dofile(signs_lib.path.."/nonascii-pl.lua")
+
 local nmdc = {
 	[36] = "$",
 	[124] = "|"
@@ -230,36 +256,33 @@ function AnsiToUtf8(s)
 end
 
 function Utf8ToAnsi(s)
-	local a, j, r, b = 0, 0, ""
+	local a, j, r, b, scope = 0, 0, ""
 	for i = 1, s and s:len() or 0 do
 		b = s:byte(i)
-		if b < 128 then
+		if b == 0x26 then
+			r = r .. "&#x26;"
+		elseif b < 128 then
 			if nmdc[b] then
 				r = r .. nmdc[b]
 			else
 				r = r .. string.char(b)
 			end
-		elseif a == 2 then
+		elseif scope then
-			a, j = a - 1, b
+			if scope[b] then
-		elseif a == 1 then
+				scope = scope[b]
-			--if j == nil or b == nil then return r end
+				if "string" == type(scope) then
-			--print(j)
+					r, scope = r .. scope
-			--print(b)
-			--local ansi = utf8_decode[j]
-			--if ansi == nil then return r end
-			--if ansi[b] == nil then return r end
-			if utf8_decode[j] then
-				if utf8_decode[j][b] then
-					a, r = a - 1, r .. utf8_decode[j][b]
 				end
+			else
+				r, scope = r .. "_"
 			end
-		elseif b == 226 then
+		elseif utf8_decode[b] then
-			a = 2
+			scope = utf8_decode[b]
-		elseif b == 194 or b == 208 or b == 209 or b == 210 then
-			j, a = b, 1
 		else
 			r = r .. "_"
 		end
 	end
 	return r
 end
+
+signs_lib.wide_character_codes = wide_character_codes

init.lua

@@ -10,7 +10,7 @@ signs_lib.path = minetest.get_modpath(minetest.get_current_modname())
 local S, NS = dofile(signs_lib.path .. "/intllib.lua")
 signs_lib.gettext = S
 
-dofile(signs_lib.path.."/api.lua")
 dofile(signs_lib.path.."/encoding.lua")
+dofile(signs_lib.path.."/api.lua")
 dofile(signs_lib.path.."/standard_signs.lua")
 dofile(signs_lib.path.."/compat.lua")

mod.conf

@@ -1,2 +1,6 @@
 name = signs_lib
-min_minetest_version = 5.2.0
+author = VanessaE
+depends = default
+optional_depends = intllib, screwdriver, streetspoles, streetlamps, cottages, prefab_redo
+description = Adds signs with readable text.
+min_minetest_version = 5.4.0

nonascii-de.lua

@@ -0,0 +1,7 @@
+signs_lib.unicode_install({195,132,"00c4"})
+signs_lib.unicode_install({195,150,"00d6"})
+signs_lib.unicode_install({195,156,"00dc"})
+signs_lib.unicode_install({195,159,"00df"})
+signs_lib.unicode_install({195,164,"00e4"})
+signs_lib.unicode_install({195,182,"00f6"})
+signs_lib.unicode_install({195,188,"00fc"})

nonascii-fr.lua

@@ -0,0 +1,16 @@
+signs_lib.unicode_install({195,128,"00c0"})
+signs_lib.unicode_install({195,134,"00c6"})
+signs_lib.unicode_install({195,135,"00c7"})
+signs_lib.unicode_install({195,136,"00c8"})
+signs_lib.unicode_install({195,137,"00c9"})
+signs_lib.unicode_install({195,138,"00ca"})
+signs_lib.unicode_install({195,148,"00d4"})
+signs_lib.unicode_install({195,153,"00d9"})
+signs_lib.unicode_install({195,160,"00e0"})
+signs_lib.unicode_install({195,166,"00e6"})
+signs_lib.unicode_install({195,167,"00e7"})
+signs_lib.unicode_install({195,168,"00e8"})
+signs_lib.unicode_install({195,169,"00e9"})
+signs_lib.unicode_install({195,170,"00ea"})
+signs_lib.unicode_install({195,180,"00f4"})
+signs_lib.unicode_install({195,185,"00f9"})

nonascii-pl.lua

@@ -0,0 +1,16 @@
+signs_lib.unicode_install({195,147,"00d3"})
+signs_lib.unicode_install({195,179,"00f3"})
+signs_lib.unicode_install({196,132,"0104"})
+signs_lib.unicode_install({196,133,"0105"})
+signs_lib.unicode_install({196,134,"0106"})
+signs_lib.unicode_install({196,135,"0107"})
+signs_lib.unicode_install({196,152,"0118"})
+signs_lib.unicode_install({196,153,"0119"})
+signs_lib.unicode_install({197,129,"0141"})
+signs_lib.unicode_install({197,130,"0142"})
+signs_lib.unicode_install({197,154,"015a"})
+signs_lib.unicode_install({197,155,"015b"})
+signs_lib.unicode_install({197,185,"0179"})
+signs_lib.unicode_install({197,186,"017a"})
+signs_lib.unicode_install({197,187,"017b"})
+signs_lib.unicode_install({197,188,"017c"})

standard_signs.lua

@@ -14,7 +14,8 @@ signs_lib.register_sign("default:sign_wall_wood", {
 	allow_widefont = true,
 	allow_onpole = true,
 	allow_onpole_horizontal = true,
-	allow_yard = true
+	allow_yard = true,
+	use_texture_alpha = "clip",
 })
 
 signs_lib.register_sign("default:sign_wall_steel", {
@@ -35,7 +36,8 @@ signs_lib.register_sign("default:sign_wall_steel", {
 	allow_widefont = true,
 	allow_onpole = true,
 	allow_onpole_horizontal = true,
-	allow_yard = true
+	allow_yard = true,
+	use_texture_alpha = "clip",
 })
 
 minetest.register_alias("signs:sign_hanging",                   "default:sign_wood_hanging")