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module Data.Text.ParagraphLayout.FontLoader
( arabicFont
, devanagariFont
, latinFont
, loadFont
, writeFontInfo
)
where
import Data.ByteString (readFile)
import Data.List (concat, (++))
import Data.Text.Glyphize
( Font
, FontOptions
, createFace
, createFontWithOptions
, faceIndex
, fontFace
, fontPPEm
, fontScale
)
import Data.Word (Word)
import Prelude (return, show, ($))
import System.FilePath (FilePath, (</>))
import System.IO (IO, writeFile)
arabicFont :: FilePath
arabicFont = "assets" </> "fonts" </> "plex" </> "IBMPlexSansArabic-Regular.ttf"
devanagariFont :: FilePath
devanagariFont = "assets" </> "fonts" </> "sarala" </> "Sarala-Regular.ttf"
latinFont :: FilePath
latinFont = "assets" </> "fonts" </> "ubuntu" </> "Ubuntu-R.ttf"
loadFont :: FilePath -> Word -> FontOptions -> IO Font
loadFont path index opts = do
ttf <- readFile path
let face = createFace ttf index
let font = createFontWithOptions opts face
return font
-- | Write a file containing information about the font and options used in a
-- test, to be passed to Typograffiti.
--
-- Note: The font path will not be escaped.
writeFontInfo :: FilePath -> FilePath -> Font -> IO ()
writeFontInfo outputPath fontPath font = writeFile outputPath info
where
info = concat [fontPath, " ", index, " ", pixelSize, " ", scale, "\n"]
index = show $ faceIndex face
pixelSize = let (x, y) = fontPPEm font in (show x) ++ "," ++ (show y)
scale = let (x, y) = fontScale font in (show x) ++ "," ++ (show y)
face = fontFace font