Add GNU Unifont

font_api/font.lua

@@ -229,7 +229,7 @@ function Font:render(text, texturew, textureh, style)
 		return ""
 	end
 
-	local x, y, codepoint
+	local x, y, codepoint, glyph
 	local texture = ""
 	local textheight = self:get_height(#lines)
 
@@ -258,8 +258,13 @@ function Font:render(text, texturew, textureh, style)
 
 			-- Add image only if it is visible (at least partly)
 			if x + self.widths[codepoint] >= 0 and x <= texturew then
+				if self.get_glyph == nil then
+					glyph = string.format("font_%s_%04x.png", self.name, codepoint)
+				else
+					glyph = self.get_glyph(codepoint):gsub("[\\^:]", "\\%0")
+				end
 				texture = texture..
-					string.format(":%d,%d=font_%s_%04x.png", x, y, self.name, codepoint)
+					string.format(":%d,%d=%s", x, y, glyph)
 			end
 			x = x + self.widths[codepoint]
 		end

unifont/depends.txt

@@ -0,0 +1 @@
+font_api

unifont/init.lua

@@ -0,0 +1,28 @@
+local widths = {}
+for i = 0,65535 do
+	widths[i] = 16
+end
+for i = 32,126 do
+	widths[i] = 8
+end
+
+local function get_glyph(codepoint)
+	if codepoint == 0 or codepoint > 0xffff then
+		codepoint = 0xfffd
+	end
+	local x = codepoint % 256
+	local y = math.floor(codepoint / 256)
+	return string.format("font_unifont_sheet.png^[sheet:256x256:%d,%d", x, y)
+end
+
+font_api.register_font(
+	"unifont",
+	{
+		default = true,
+		margintop = 2,
+		linespacing = -1,
+		height = 16,
+		widths = widths,
+		get_glyph = get_glyph,
+	}
+)

unifont/mod.conf

@@ -0,0 +1,3 @@
+name=unifont
+description=GNU Unifont (full Unicode Plane 0 coverage) for font_api
+depends=font_api