Decompress defalte compressed fonts

app/Main.hs

@@ -2,44 +2,25 @@ module Main
     ( main
     ) where
 
-import Control.Monad (foldM_)
-import Data.Int (Int64)
-import qualified Data.ByteString as ByteString
-import qualified Data.ByteString.Char8 as Char8
-import Data.ByteString (ByteString)
+import Data.Bifunctor (Bifunctor(..))
 import qualified Text.Megaparsec as Megaparsec
-import Data.Foldable (find)
 import qualified Data.Text.Lazy.Builder as Text.Builder
-import qualified Data.Text.Lazy.Builder.Int as Text.Builder
-import qualified Data.Text.Lazy as Text.Lazy
 import qualified Data.Text.Lazy.IO as Text.Lazy
-import qualified Data.Text.Encoding as Text
-import GHC.Records (HasField(..))
-import Graphics.Fountainhead.Dumper (DumpError(..), dumpTrueType)
+import Graphics.Fountainhead (parseFontDirectoryFromFile)
+import Graphics.Fountainhead.Dumper (DumpError(..), dumpTables)
 -- TODO: kern table since format 1.
 -- For details on subtable format see examples in TrueType reference.
-import Graphics.Fountainhead.Parser
-    ( fontDirectoryP
-    , os2TableP
-    , parseTable
-    , shortLocaTableP
-    )
-import Graphics.Fountainhead.TrueType
-    ( FontDirectory(..)
-    , OffsetSubtable(..)
-    , TableDirectory(..)
-    )
 import System.Environment (getArgs)
 import System.Exit (exitWith)
 import GHC.IO.Exception (ExitCode(..))
 
 fontMain :: FilePath -> IO ()
 fontMain fontFile = do
-    putStrLn $ "Dumping File:" <> fontFile <> "\n\n"
+    putStrLn ("Dumping File:" <> fontFile <> "\n\n")
 
-    ttfContents <- ByteString.readFile fontFile
-    
-    case dumpTrueType ttfContents fontFile of
+    (processedState, initialResult) <- parseFontDirectoryFromFile fontFile
+
+    case first DumpParseError initialResult >>= dumpTables processedState of
         Right fontDump -> Text.Lazy.putStrLn $ Text.Builder.toLazyText fontDump
         Left e
             | DumpParseError bundle <- e -> putStr