Updated font and fs lib; updated editor; updated sf2dlib

Libs additions: font.load, font:unload, font:getWidth, fs.getDirectory, fs.setDirectory, fs.exists

Editor additions: syntaxic coloring and mono font

sf2dlib update: you will need the latest version of ctrulib.

Also, because of the lib font needs, the sftdlib was modified.

libs/sf2dlib/libsf2d/source/sf2d.c

@@ -151,7 +151,7 @@ void sf2d_start_frame(gfxScreen_t screen, gfx3dSide_t side)
 	GPU_DepthMap(-1.0f, 0.0f);
 	GPU_SetFaceCulling(GPU_CULL_NONE);
 	GPU_SetStencilTest(false, GPU_ALWAYS, 0x00, 0xFF, 0x00);
-	GPU_SetStencilOp(GPU_KEEP, GPU_KEEP, GPU_KEEP);
+	GPU_SetStencilOp(GPU_STENCIL_KEEP, GPU_STENCIL_KEEP, GPU_STENCIL_KEEP);
 	GPU_SetBlendingColor(0,0,0,0);
 	GPU_SetDepthTestAndWriteMask(true, GPU_GEQUAL, GPU_WRITE_ALL);
 	GPUCMD_AddMaskedWrite(GPUREG_0062, 0x1, 0);

libs/sf2dlib/libsf2d/source/sf2d_texture.c

@@ -78,7 +78,13 @@ sf2d_texture *sf2d_create_texture(int width, int height, sf2d_texfmt pixel_forma
 	texture->data_size = data_size;
 	texture->data = data;
 
-	memset(texture->data, 0, texture->data_size);
+	if (place == SF2D_PLACE_VRAM) {
+		GX_SetMemoryFill(NULL, texture->data, 0x00000000, (u32*)&((u8*)texture->data)[texture->data_size], GX_FILL_TRIGGER | GX_FILL_32BIT_DEPTH,
+			NULL, 0x00000000, NULL, 0);
+		gspWaitForPSC0();
+	} else {
+		memset(texture->data, 0, texture->data_size);
+	}
 
 	return texture;
 }

libs/sftdlib/libsftd/include/sftd.h

@@ -105,6 +105,8 @@ void sftd_draw_wtext(sftd_font *font, int x, int y, unsigned int color, unsigned
  */
 void sftd_draw_wtextf(sftd_font *font, int x, int y, unsigned int color, unsigned int size, const wchar_t *text, ...);
 
+// (ctruLua addition) Based on sftd_draw_wtext, returns the width of the text drawn.
+int sftd_width_wtext(sftd_font *font, unsigned int size, const wchar_t *text);
 
 #ifdef __cplusplus
 }

libs/sftdlib/libsftd/source/sftd.c

@@ -228,7 +228,7 @@ void sftd_draw_text(sftd_font *font, int x, int y, unsigned int color, unsigned
 			&rect, &bitmap_left, &bitmap_top,
 			&advance_x, &advance_y, &glyph_size);
 
-		const float draw_scale = glyph_size/(float)size;
+		const float draw_scale = size/(float)glyph_size;
 
 		sf2d_draw_texture_part_scale_blend(font->tex_atlas->tex,
 			pen_x + bitmap_left * draw_scale,
@@ -304,7 +304,7 @@ void sftd_draw_wtext(sftd_font *font, int x, int y, unsigned int color, unsigned
 			&rect, &bitmap_left, &bitmap_top,
 			&advance_x, &advance_y, &glyph_size);
 
-		const float draw_scale = (float)size/glyph_size;
+		const float draw_scale = size/(float)glyph_size;
 
 		sf2d_draw_texture_part_scale_blend(font->tex_atlas->tex,
 			pen_x + bitmap_left * draw_scale,
@@ -332,3 +332,62 @@ void sftd_draw_wtextf(sftd_font *font, int x, int y, unsigned int color, unsigne
 	va_end(args);
 }
 
+// (ctruLua addition) Based on sftd_draw_wtext, returns the width of the text drawn.
+int sftd_width_wtext(sftd_font *font, unsigned int size, const wchar_t *text)
+{
+	FTC_FaceID face_id = (FTC_FaceID)font;
+	FT_Face face;
+	FTC_Manager_LookupFace(ftcmanager, face_id, &face);
+
+	FT_Int charmap_index;
+	charmap_index = FT_Get_Charmap_Index(face->charmap);
+
+	FT_Glyph glyph;
+	FT_Bool use_kerning = FT_HAS_KERNING(face);
+	FT_UInt glyph_index, previous = 0;
+	int pen_x = 0;
+
+	FTC_ScalerRec scaler;
+	scaler.face_id = face_id;
+	scaler.width = size;
+	scaler.height = size;
+	scaler.pixel = 1;
+
+	FT_ULong flags = FT_LOAD_RENDER | FT_LOAD_TARGET_NORMAL;
+
+	while (*text) {
+		glyph_index = FTC_CMapCache_Lookup(font->cmapcache, (FTC_FaceID)font, charmap_index, *text);
+
+		if (use_kerning && previous && glyph_index) {
+			FT_Vector delta;
+			FT_Get_Kerning(face, previous, glyph_index, FT_KERNING_DEFAULT, &delta);
+			pen_x += delta.x >> 6;
+		}
+
+		if (!texture_atlas_exists(font->tex_atlas, glyph_index)) {
+			FTC_ImageCache_LookupScaler(font->imagecache, &scaler, flags, glyph_index, &glyph, NULL);
+
+			if (!atlas_add_glyph(font->tex_atlas, glyph_index, (FT_BitmapGlyph)glyph, size)) {
+				continue;
+			}
+		}
+
+		bp2d_rectangle rect;
+		int bitmap_left, bitmap_top;
+		int advance_x, advance_y;
+		int glyph_size;
+
+		texture_atlas_get(font->tex_atlas, glyph_index,
+			&rect, &bitmap_left, &bitmap_top,
+			&advance_x, &advance_y, &glyph_size);
+
+		const float draw_scale = size/(float)glyph_size;
+
+		pen_x += (advance_x >> 16) * draw_scale;
+
+		previous = glyph_index;
+		text++;
+	}
+
+	return pen_x;
+}

sdcard/3ds/ctruLua/editor/color.lua

@@ -1,6 +1,16 @@
 -- Colors based on the Monokai theme
 return {
-	background = 0x272822FF,
-	default = 0xF8F8F2FF,
-	cursor = 0xFF0000FF
+	-- General
+	["background"] = 0x272822FF,
+	["cursor"] = 0xF8F8F0FF,
+	["default"] = 0xF8F8F2FF,
+
+	-- Syntax
+	["comment"] = 0x75715EFF,
+	["string"] = 0xE6DB74FF,
+	["constant.numeric"] = 0xAE81FFFF,
+	["constant.language"] = 0xAE81FFFF,
+	["keyword.control"] = 0xF92672FF,
+	["keyword.operator"] = 0xF92672FF,
+	["support.function"] = 0x66D9EFFF
 }

sdcard/3ds/ctruLua/editor/main.lua

@@ -5,27 +5,45 @@ local gfx = require("ctr.gfx")
 -- Open libs
 local keyboard = dofile("sdmc:/3ds/ctruLua/keyboard.lua")
 local openfile = dofile("sdmc:/3ds/ctruLua/openfile.lua")
-local color = dofile("sdmc:/3ds/ctruLua/editor/color.lua")
+local color = dofile("color.lua")
+local syntax = dofile("syntax.lua")
+
+-- Load data
+local font = gfx.font.load("VeraMono.ttf")
 
 -- Open file
 local path, status = openfile("Choose a file to edit", "/3ds/ctruLua/", nil, "any")
 if not path then return end
+local lineEnding
 local lines = {}
 if status == "exist" then
-	for line in io.lines(path) do table.insert(lines, line) end
+	for line in io.lines(path, "L") do
+		if not lineEnding then lineEnding = line:match("([\n\r]+)$") end
+		table.insert(lines, line:match("^(.-)[\n\r]*$"))
+	end
 else
+	lineEnding = "\n"
 	lines = { "" }
 end
 
+-- Syntax coloring
+local coloredLines = syntax(lines, color)
+
 -- Variables
 local lineHeight = 10
 local cursorX, cursorY = 1, 1
 local scrollX, scrollY = 0, 0
 
+-- Helper functions
+local function displayedText(text)
+	return text:gsub("\t", "    ")
+end
+
 -- Set defaults
 gfx.set3D(false)
 gfx.color.setDefault(color.default)
 gfx.color.setBackground(color.background)
+gfx.font.setDefault(font)
 
 while ctr.run() do
 	hid.read()
@@ -75,10 +93,10 @@ while ctr.run() do
 			until t + 5 < os.time()
 		else
 			for i = 1, #lines, 1 do
-				file:write(lines[i].."\n")
+				file:write(lines[i]..lineEnding)
 				gfx.startFrame(gfx.GFX_TOP)
 				gfx.rectangle(0, 0, math.ceil(i/#lines*gfx.TOP_WIDTH), gfx.TOP_HEIGHT, 0, 0xFFFFFFFF)
-				gfx.color.setDefault(0x000000FF)
+				gfx.color.setDefault(color.background)
 				gfx.text(gfx.TOP_WIDTH/2, gfx.TOP_HEIGHT/2, math.ceil(i/#lines*100).."%")
 				gfx.color.setDefault(color.default)
 				gfx.endFrame()
@@ -122,6 +140,7 @@ while ctr.run() do
 	-- Draw
 	gfx.startFrame(gfx.GFX_TOP)
 
+		-- Lines
 		local sI = math.floor(scrollY / lineHeight)
 		if sI < 1 then sI = 1 end
 		
@@ -129,21 +148,30 @@ while ctr.run() do
 		if eI > #lines then eI = #lines end
 		
 		for i = sI, eI, 1 do
-			local line = lines[i]
+			local x = -scrollX
 			local y = -scrollY+ (i-1)*lineHeight
-			
-			if cursorY == i then
-				gfx.color.setDefault(color.cursor)
-				gfx.text(-scrollX, y, line:sub(1, (utf8.offset(line, cursorX) or 0)-1):gsub("\t", "    ").."|", nil) -- TODO: color doesn't work
+
+			for _,colored in ipairs(coloredLines[i]) do
+				local str = displayedText(colored[1])
+
+				gfx.color.setDefault(colored[2])
+				gfx.text(x, y, str)
 				gfx.color.setDefault(color.default)
+
+				x = x + font:width(str)
 			end
-			
-			gfx.text(-scrollX, y, line:gsub("\t", "    "), nil)
 		end
 
+		-- Cursor
+		local curline = lines[cursorY]
+		gfx.rectangle(-scrollX+ font:width(displayedText(curline:sub(1, (utf8.offset(curline, cursorX) or 0)-1))), 
+		              -scrollY+ (cursorY-1)*lineHeight, 1, lineHeight, 0, color.cursor)
+
 	gfx.endFrame()
 	
 	gfx.startFrame(gfx.GFX_BOTTOM)
+
+		gfx.text(3, 3, "FPS: "..math.ceil(gfx.getFPS()))
 		
 		keyboard.draw(5, 115)
 		
@@ -151,3 +179,5 @@ while ctr.run() do
 
 	gfx.render()
 end
+
+font:unload()

sdcard/3ds/ctruLua/editor/syntax.lua

@@ -0,0 +1,90 @@
+-- Each pattern should return 3 captures : start position, the string to colorize, and the end position.
+local syntax = {
+	{ "comment", { "()(%-%-.*)()$" } },
+
+	--["string"] = { "()(%'.*%f[%\\]%')()", "()(%\".*%f[%\\]%\")()" },
+	{ "string", { "()(%'[^%']*%')()", "()(%\"[^%\"]*%\")()" } },
+
+	{ "constant.numeric", {
+		"%f[%d%w%.]()(0x[a-fA-F%d]+)()%f[^%d%w%.]",
+		"%f[%d%w%.]()([%d% ]+%.[%d% ]+)()%f[^%d%w%.]",
+		"%f[%d%w%.]()([%d% ]+)()%f[^%d%w%.]"
+		}
+	},
+
+	{ "constant.language", {
+		"%f[%w]()(false)()%f[%W]", "%f[%w]()(nil)()%f[%W]", "%f[%w]()(true)()%f[%W]", "%f[%w]()(_G)()%f[%W]",
+		"%f[%w]()(_VERSION)()%f[%W]", "%f[%w]()(math.pi)()%f[%W]", "%f[%w]()(math.huge)()%f[%W]", "%f[%w]()(%.%.%.)()%f[%W]"
+		}
+	},
+
+	{ "keyword.control", {
+		"%f[%w]()(break)()%f[%W]", "%f[%w]()(goto)()%f[%W]", "%f[%w]()(do)()%f[%W]", "%f[%w]()(else)()%f[%W]",
+		"%f[%w]()(for)()%f[%W]", "%f[%w]()(if)()%f[%W]", "%f[%w]()(elseif)()%f[%W]", "%f[%w]()(return)()%f[%W]",
+		"%f[%w]()(then)()%f[%W]", "%f[%w]()(repeat)()%f[%W]", "%f[%w]()(while)()%f[%W]", "%f[%w]()(until)()%f[%W]",
+		"%f[%w]()(end)()%f[%W]", "%f[%w]()(function)()%f[%W]", "%f[%w]()(local)()%f[%W]", "%f[%w]()(in)()%f[%W]"
+		}
+	},
+
+	{ "keyword.operator", {
+		"%f[%w]()(and)()%f[%W]", "%f[%w]()(or)()%f[%W]", "%f[%w]()(not)()%f[%W]",
+		"()(%+)()", "()(%-)()", "()(%%)()", "()(%#)()", "()(%*)()", "()(%/%/?)()", "()(%^)()", "()(%=%=?)()", "()(%~%=?)()",
+		"()(%.%.)()", "()(%<%=?)()", "()(%>%=?)()", "()(%&)()", "()(%|)()", "()(%<%<)()", "()(%>%>)()", 
+		}
+	},
+
+	{ "support.function", {
+		"[^%.%:]()(assert)()[%( %{]", "[^%.%:]()(collectgarbage)()[%( %{]", "[^%.%:]()(dofile)()[%( %{]",
+		"[^%.%:]()(error)()[%( %{]", "[^%.%:]()(getfenv)()[%( %{]", "[^%.%:]()(getmetatable)()[%( %{]",
+		"[^%.%:]()(ipairs)()[%( %{]", "[^%.%:]()loadfile)()[%( %{]", "[^%.%:]()(loadstring)()[%( %{]",
+		"[^%.%:]()(module)()[%( %{]", "[^%.%:]()(next)()[%( %{]", "[^%.%:]()(pairs)()[%( %{]",
+		"[^%.%:]()(pcall)()[%( %{]", "[^%.%:]()(print)()[%( %{]", "[^%.%:]()(rawequal)()[%( %{]",
+		"[^%.%:]()(rawget)()[%( %{]", "[^%.%:]()(rawset)()[%( %{]", "[^%.%:]()(require)()[%( %{]",
+		"[^%.%:]()(select)()[%( %{]", "[^%.%:]()(setfenv)()[%( %{]", "[^%.%:]()(setmetatable)()[%( %{]",
+		"[^%.%:]()(tonumber)()[%( %{]", "[^%.%:]()(tostring)()[%( %{]", "[^%.%:]()(type)()[%( %{]", 
+		"[^%.%:]()(unpack)()[%( %{]", "[^%.%:]()(xpcall)()[%( %{]"
+		}
+	}
+}
+
+return function(lines, color)
+	local ret = {}
+
+	for _,line in ipairs(lines) do
+		local colored = { { line, color.default } }
+
+		for _, patterns in ipairs(syntax) do
+			local name = patterns[1]
+
+			for _, pattern in ipairs(patterns[2]) do
+				local i = 1
+				while i <= #colored do
+					local oldcolor = colored[i][2]
+
+					if oldcolor == color.default then
+						local part = colored[i][1]
+						
+						local starti, match, endi = part:match(pattern)
+						if starti then
+							table.remove(colored, i)
+							if starti > 1 then
+								table.insert(colored, i, { part:sub(1, starti-1), oldcolor })
+								i = i + 1
+							end
+							table.insert(colored, i, { match, color[name] or color.default })
+							if endi <= #part then
+								table.insert(colored, i+1, { part:sub(endi, -1), oldcolor })
+							end
+						end
+					end
+
+					i = i + 1
+				end
+			end
+		end
+
+		table.insert(ret, colored)
+	end
+
+	return ret
+end

sdcard/3ds/ctruLua/main.lua

@@ -1,4 +1,10 @@
+local fs = require("ctr.fs")
+
 repeat
-	local file = dofile("sdmc:/3ds/ctruLua/openfile.lua")("Choose a Lua file to execute", "/3ds/ctruLua/", ".lua", "exist")
-	if file then dofile(file) end
+	fs.setDirectory("sdmc:/3ds/ctruLua")
+	local file = dofile("openfile.lua")("Choose a Lua file to execute", "/3ds/ctruLua/", ".lua", "exist")
+	if file then
+		fs.setDirectory(file:match("^(.-)[^/]*$"))
+		dofile(file)
+	end
 until not file

sdcard/3ds/ctruLua/openfile.lua

@@ -29,9 +29,11 @@ return function(title, curdir, exts, type)
 	--local was3D = gfx.get3D() TODO: implement this thing in ctruLua
 	local wasDefault = gfx.color.getDefault()
 	local wasBackground = gfx.color.getBackground()
+	local wasFont = gfx.font.getDefault()
 	gfx.set3D(false)
 	gfx.color.setDefault(0xFFFFFFFF)
 	gfx.color.setBackground(0x000000FF)
+	gfx.font.setDefault()
 
 	while ctr.run() do
 		ctr.hid.read()
@@ -130,6 +132,7 @@ return function(title, curdir, exts, type)
 	--gfx.set3D(was3D)
 	gfx.color.setDefault(wasDefault)
 	gfx.color.setBackground(wasBackground)
+	gfx.font.setDefault(wasFont)
 	
 	if ret then
 		return table.unpack(ret)

source/font.c

@@ -1,27 +1,126 @@
+#include <unistd.h>
+#include <stdlib.h>
+
 #include <sftd.h>
 #include "vera_ttf.h"
 
 #include <lua.h>
 #include <lauxlib.h>
 
-sftd_font *font_default;
+#include "font.h"
 
+static int font_load(lua_State *L) {
+	const char *path = luaL_checkstring(L, 1);
+
+	font_userdata *font = lua_newuserdata(L, sizeof(*font));
+	luaL_getmetatable(L, "LFont");
+	lua_setmetatable(L, -2);
+
+	font->font = sftd_load_font_file(path);
+
+	// SFTD doesn't actually check if the file exist, so we have to do this ourselves.
+	if (font->font == NULL || access(path, F_OK) != 0) {
+		lua_pushnil(L);
+		lua_pushfstring(L, "No valid font file at %s", path);
+		return 2;
+	}
+
+	return 1;
+}
+
+static int font_setDefault(lua_State *L) {
+	if (luaL_testudata(L, 1, "LFont") == NULL) {
+		font_userdata *font = lua_newuserdata(L, sizeof(*font));
+		luaL_getmetatable(L, "LFont");
+		lua_setmetatable(L, -2);
+
+		font->font = sftd_load_font_mem(vera_ttf, vera_ttf_size);
+	}
+
+	lua_setfield(L, LUA_REGISTRYINDEX, "LFontDefault");
+
+	return 0;
+}
+
+static int font_getDefault(lua_State *L) {
+	lua_getfield(L, LUA_REGISTRYINDEX, "LFontDefault");
+
+	return 1;
+}
+
+static int font_object_width(lua_State *L) {
+	font_userdata *font = luaL_checkudata(L, 1, "LFont");
+	if (font->font == NULL) luaL_error(L, "The font object was unloaded");
+
+	size_t len;
+	const char *text = luaL_checklstring(L, 2, &len);
+
+	int size = luaL_optinteger(L, 3, 9);
+
+	// Wide caracters support. (wchar = UTF32 on 3DS.)
+	wchar_t wtext[len];
+	len = mbstowcs(wtext, text, len);
+	*(wtext+len) = 0x0; // text end
+
+	lua_pushinteger(L, sftd_width_wtext(font->font, size, wtext));
+
+	return 1;
+}
+
+static int font_object_unload(lua_State *L) {
+	font_userdata *font = luaL_checkudata(L, 1, "LFont");
+	if (font->font == NULL) return 0;
+
+	sftd_free_font(font->font);
+	font->font = NULL;
+
+	return 0;
+}
+
+// Font object methods
+static const struct luaL_Reg font_object_methods[] = {
+	{ "width",  font_object_width  },
+	{ "unload", font_object_unload },
+	{ "__gc",   font_object_unload },
+	{ NULL, NULL }
+};
+
+// Library functions
 static const struct luaL_Reg font_lib[] = {
+	{ "load",       font_load       },
+	{ "setDefault", font_setDefault },
+	{ "getDefault", font_getDefault },
 	{ NULL, NULL }
 };
 
 int luaopen_font_lib(lua_State *L) {
+	luaL_newmetatable(L, "LFont");
+	lua_pushvalue(L, -1);
+	lua_setfield(L, -2, "__index");
+	luaL_setfuncs(L, font_object_methods, 0);
+
 	luaL_newlib(L, font_lib);
 
 	return 1;
 }
 
 void load_font_lib(lua_State *L) {
-	font_default = sftd_load_font_mem(vera_ttf, vera_ttf_size); // Load default font
+	// Load default font
+	font_userdata *font = lua_newuserdata(L, sizeof(*font));
+	luaL_getmetatable(L, "LFont");
+	lua_setmetatable(L, -2);
 
+	font->font = sftd_load_font_mem(vera_ttf, vera_ttf_size);
+
+	lua_setfield(L, LUA_REGISTRYINDEX, "LFontDefault");
+
+	// Load lib
 	luaL_requiref(L, "ctr.gfx.font", luaopen_font_lib, false);
 }
 
 void unload_font_lib(lua_State *L) {
-	sftd_free_font(font_default); // Unload current font
+	lua_getfield(L, LUA_REGISTRYINDEX, "LFontDefault");
+
+	if (luaL_testudata(L, -1, "LFont") != NULL)
+		sftd_free_font(((font_userdata *)lua_touserdata(L, -1))->font); // Unload current font
 }

source/font.h

@@ -0,0 +1,8 @@
+#ifndef FONT_H
+#define FONT_H
+
+typedef struct {
+	sftd_font *font;
+} font_userdata;
+
+#endif

source/fs.c

@@ -1,3 +1,5 @@
+#include <unistd.h>
+
 #include <3ds/types.h>
 #include <3ds/util/utf.h>
 #include <3ds/services/fs.h>
@@ -8,7 +10,7 @@
 Handle *fsuHandle;
 FS_archive sdmcArchive;
 
-int fs_list(lua_State *L) {
+static int fs_list(lua_State *L) {
 	const char *path = luaL_checkstring(L, 1);
 
 	lua_newtable(L);
@@ -60,8 +62,40 @@ int fs_list(lua_State *L) {
 	return 1;
 }
 
+static int fs_exists(lua_State *L) {
+	const char *path = luaL_checkstring(L, 1);
+	
+	lua_pushboolean(L, access(path, F_OK) == 0);
+
+	return 1;
+}
+
+static int fs_getDirectory(lua_State *L) {
+	char cwd[256];
+
+	lua_pushstring(L, getcwd(cwd, 256));
+
+	return 1;
+}
+
+static int fs_setDirectory(lua_State *L) {
+	const char *path = luaL_checkstring(L, 1);
+
+	int result = chdir(path);
+
+	if (result == 0)
+		lua_pushboolean(L, true);
+	else
+		lua_pushboolean(L, false);
+
+	return 1;
+}
+
 static const struct luaL_Reg fs_lib[] = {
-	{ "list", fs_list },
+	{ "list",         fs_list         },
+	{ "exists",       fs_exists       },
+	{ "getDirectory", fs_getDirectory },
+	{ "setDirectory", fs_setDirectory },
 	{ NULL, NULL }
 };
 

source/gfx.c

@@ -8,6 +8,8 @@
 #include <lua.h>
 #include <lauxlib.h>
 
+#include "font.h"
+
 bool isGfxInitialised = false;
 
 void load_color_lib(lua_State *L);
@@ -18,7 +20,6 @@ void load_map_lib(lua_State *L);
 void unload_font_lib(lua_State *L);
 
 u32 color_default;
-sftd_font *font_default;
 
 static int gfx_startFrame(lua_State *L) {
 	u8 screen = luaL_checkinteger(L, 1);
@@ -124,14 +125,20 @@ static int gfx_text(lua_State *L) {
 
 	int size = luaL_optinteger(L, 4, 9);
 	u32 color = luaL_optinteger(L, 5, color_default);
-	// todo : font selection
+	font_userdata *font = luaL_testudata(L, 6, "LFont");
+	if (font == NULL) {
+		lua_getfield(L, LUA_REGISTRYINDEX, "LFontDefault");
+		font = luaL_testudata(L, -1, "LFont");
+		if (font == NULL) luaL_error(L, "No default font set and no font object passed");
+	}
+	if (font->font == NULL) luaL_error(L, "The font object was unloaded");
 
 	// Wide caracters support. (wchar = UTF32 on 3DS.)
 	wchar_t wtext[len];
 	len = mbstowcs(wtext, text, len);
 	*(wtext+len) = 0x0; // text end
 
-	sftd_draw_wtext(font_default, x, y, color, size, wtext);
+	sftd_draw_wtext(font->font, x, y, color, size, wtext);
 
 	return 0;
 }