local lfs = require("libs/libkoreader-lfs") local Freetype = require("ffi/freetype") local Screen = require("device").screen local Device = require("device") local DEBUG = require("dbg") local Font = { fontmap = { -- default font for menu contents cfont = "noto/NotoSans-Regular.ttf", -- default font for title --tfont = "NimbusSanL-BoldItal.cff", tfont = "noto/NotoSans-Bold.ttf", -- default font for footer ffont = "noto/NotoSans-Regular.ttf", -- default font for reading position info rifont = "noto/NotoSans-Regular.ttf", -- default font for pagination display pgfont = "noto/NotoSans-Regular.ttf", -- selectmenu: font for item shortcut scfont = "droid/DroidSansMono.ttf", -- help page: font for displaying keys hpkfont = "droid/DroidSansMono.ttf", -- font for displaying help messages hfont = "noto/NotoSans-Regular.ttf", -- font for displaying input content -- we have to use mono here for better distance controlling infont = "droid/DroidSansMono.ttf", -- font for info messages infofont = "noto/NotoSans-Regular.ttf", }, fallbacks = { [1] = "noto/NotoSansCJK-Regular.ttf", [2] = "noto/NotoSans-Regular.ttf", [3] = "freefont/FreeSans.ttf", }, fontdir = "./fonts", -- face table faces = {}, } function Font:getFace(font, size) -- default to content font if not font then font = self.cfont end -- original size before scaling by screen DPI local orig_size = size local size = Screen:scaleBySize(size) local hash = font..size local face_obj = self.faces[hash] -- build face if not found if not face_obj then local realname = self.fontmap[font] if not realname then realname = font end realname = self.fontdir.."/"..realname ok, face = pcall(Freetype.newFace, realname, size) if not ok then DEBUG("#! Font "..font.." ("..realname..") not supported: "..face) return nil end face_obj = { size = size, orig_size = orig_size, ftface = face, hash = hash } self.faces[hash] = face_obj -- DEBUG("getFace, found: "..realname.." size:"..size) end return face_obj end function Font:_readList(target, dir) -- lfs.dir non-exsitent directory will give error, weird! local ok, iter, dir_obj = pcall(lfs.dir, dir) if not ok then return end for f in iter, dir_obj do if lfs.attributes(dir.."/"..f, "mode") == "directory" and f ~= "." and f ~= ".." then self:_readList(target, dir.."/"..f) else local file_type = string.lower(string.match(f, ".+%.([^.]+)") or "") if file_type == "ttf" or file_type == "ttc" or file_type == "cff" or file_type == "otf" then table.insert(target, dir.."/"..f) end end end end function Font:_getExternalFontDir() if Device:isAndroid() then return ANDROID_FONT_DIR else return os.getenv("EXT_FONT_DIR") end end function Font:getFontList() local fontlist = {} self:_readList(fontlist, self.fontdir) -- multiple paths should be joined with semicolon for dir in string.gmatch(self:_getExternalFontDir() or "", "([^;]+)") do self:_readList(fontlist, dir) end table.sort(fontlist) return fontlist end return Font