Initial commit.

mods/firefly_font/init.lua

@@ -0,0 +1,46 @@
+local ns = firefly
+local modname = minetest.get_current_modname()
+
+ns.fonts = {}
+
+function ns.rasterize(str, font, max_width)
+    if not font then font = "firefly_normal" end
+    local atlas = ns.fonts[font] or minetest.parse_json(ns.read_file(minetest.get_modpath(modname).."/fonts/"..font..".json"))
+    if not ns.fonts[font] then
+        ns.fonts[font] = atlas
+    end
+    
+    local newline = string.byte("\n", 1)
+    
+    local out = {}
+    local width = 0
+    local height = 0
+    local x = 0
+    local y = 0
+    for i = 0, #str do
+        local char = str:byte(i)
+        if not char then goto continue end
+        if char == newline then
+            goto continue
+        end
+        local glyph = atlas[string.char(char)]
+        
+        local num = #out
+        out[num +1] = ":"
+        out[num +2] = x
+        out[num +3] = ","
+        out[num +4] = y
+        out[num +5] = "="
+        out[num +6] = font
+        out[num +7] = "/firefly_char_"
+        out[num +8] = char
+        out[num +9] = ".png"
+        
+        x = x +glyph.width +glyph.advance
+        if x > width then
+            width = x
+        end
+        ::continue::
+    end
+    return "[combine:"..width.."x"..height..table.concat(out)
+end