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https://github.com/koreader/koreader
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a40c172c47
It turns out that one of our mupdf patch reads the FONTDIR env var and uses it in a totally different way so we will use another env var EXT_FONT_DIR to define external font directory for different platforms.
117 lines
3.4 KiB
Lua
117 lines
3.4 KiB
Lua
local lfs = require("libs/libkoreader-lfs")
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local Freetype = require("ffi/freetype")
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local Screen = require("device").screen
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local DEBUG = require("dbg")
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local Font = {
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fontmap = {
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-- default font for menu contents
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cfont = "noto/NotoSans-Regular.ttf",
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-- default font for title
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--tfont = "NimbusSanL-BoldItal.cff",
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tfont = "noto/NotoSans-Bold.ttf",
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-- default font for footer
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ffont = "noto/NotoSans-Regular.ttf",
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-- default font for reading position info
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rifont = "noto/NotoSans-Regular.ttf",
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-- default font for pagination display
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pgfont = "noto/NotoSans-Regular.ttf",
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-- selectmenu: font for item shortcut
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scfont = "droid/DroidSansMono.ttf",
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-- help page: font for displaying keys
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hpkfont = "droid/DroidSansMono.ttf",
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-- font for displaying help messages
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hfont = "noto/NotoSans-Regular.ttf",
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-- font for displaying input content
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-- we have to use mono here for better distance controlling
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infont = "droid/DroidSansMono.ttf",
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-- font for info messages
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infofont = "noto/NotoSans-Regular.ttf",
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},
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fallbacks = {
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[1] = "droid/DroidSansFallback.ttc",
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[2] = "noto/NotoSans-Regular.ttf",
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[3] = "droid/DroidSans.ttf",
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[4] = "freefont/FreeSans.ttf",
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},
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fontdir = "./fonts",
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-- face table
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faces = {},
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}
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function Font:getFace(font, size)
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if not font then
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-- default to content font
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font = self.cfont
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end
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-- original size before scaling by screen DPI
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local orig_size = size
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local size = Screen:scaleBySize(size)
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local face = self.faces[font..size]
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-- build face if not found
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if not face then
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local realname = self.fontmap[font]
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if not realname then
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realname = font
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end
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realname = self.fontdir.."/"..realname
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ok, face = pcall(Freetype.newFace, realname, size)
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if not ok then
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DEBUG("#! Font "..font.." ("..realname..") not supported: "..face)
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return nil
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end
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self.faces[font..size] = face
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--DEBUG("getFace, found: "..realname.." size:"..size)
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end
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return { size = size, orig_size = orig_size, ftface = face, hash = font..size }
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end
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function Font:_readList(target, dir)
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-- lfs.dir non-exsitent directory will give error, weird!
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local ok, iter, dir_obj = pcall(lfs.dir, dir)
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if not ok then return end
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for f in iter, dir_obj do
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if lfs.attributes(dir.."/"..f, "mode") == "directory" and f ~= "." and f ~= ".." then
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self:_readList(target, dir.."/"..f)
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else
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local file_type = string.lower(string.match(f, ".+%.([^.]+)") or "")
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if file_type == "ttf" or file_type == "ttc"
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or file_type == "cff" or file_type == "otf" then
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table.insert(target, dir.."/"..f)
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end
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end
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end
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end
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function Font:getFontList()
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local fontlist = {}
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self:_readList(fontlist, self.fontdir)
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-- multiple path should be joined with semicolon in FONTDIR env variable
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for dir in string.gmatch(os.getenv("EXT_FONT_DIR") or "", "([^;]+)") do
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self:_readList(fontlist, dir)
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end
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table.sort(fontlist)
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return fontlist
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end
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function Font:update()
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for _k, _v in ipairs(self.faces) do
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_v:done()
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end
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self.faces = {}
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clearGlyphCache()
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end
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return Font
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