Dump the GASP table

src/Graphics/Fountainhead/Dumper.hs

@@ -45,6 +45,8 @@ import Graphics.Fountainhead.TrueType
     ( CmapTable(..)
     , FontDirectory(..)
     , FontDirectionHint(..)
+    , GASPRange(..)
+    , GASPTable(..)
     , HeadTable(..)
     , HheaTable(..)
     , HmtxTable(..)
@@ -84,6 +86,7 @@ import Graphics.Fountainhead.Parser
     , headTableP
     , hheaTableP
     , hmtxTableP
+    , gaspTableP
     , locaTableP
     , maxpTableP
     , nameTableP
@@ -617,6 +620,18 @@ dumpMaxp (OpenMaxp OpenMaxpTable{..})
     <> "         'maxp' version:         " <> dumpFixed32 version <> newlineBuilder <> newlineBuilder
     <> "         numGlyphs:              " <> Text.Builder.decimal numGlyphs <> newlineBuilder
 
+dumpGASP :: GASPTable -> Text.Builder.Builder
+dumpGASP GASPTable{..} = dumpCaption "'gasp' Table - Grid-fitting And Scan-conversion Procedure"
+    <> "'gasp' version:  " <> Text.Builder.decimal version <> newlineBuilder
+    <> "numRanges:       " <> Text.Builder.decimal (Prelude.length gaspRange) <> newlineBuilder
+    <> foldMap dumpGASPRange (zip [0..] gaspRange)
+  where
+    dumpGASPRange :: (Int, GASPRange) -> Text.Builder.Builder
+    dumpGASPRange (index', GASPRange{..}) = newlineBuilder
+        <> "         gasp Range " <> Text.Builder.decimal index' <> newlineBuilder
+        <> "         rangeMaxPPEM:   " <> Text.Builder.decimal rangeMaxPPEM <> newlineBuilder
+        <> "         rangeGaspBehavior:      0x" <> halfPaddedHexadecimal rangeGaspBehavior <> newlineBuilder
+
 dumpTables
     :: Megaparsec.State ByteString Void
     -> FontDirectory
@@ -655,6 +670,7 @@ dumpTables processedState directory@FontDirectory{..}
             "post" -> Just $ dumpPost <$> parseTable tableEntry postTableP processedState
             "OS/2" -> Just $ dumpOs2 <$> parseTable tableEntry os2TableP processedState
             "cvt " -> Just $ dumpCVTable <$> parseTable tableEntry cvTableP processedState
+            "gasp" -> Just $ dumpGASP <$> parseTable tableEntry gaspTableP processedState
             _ -> Nothing
 
 dumpTrueType :: ByteString -> FilePath -> Either DumpError Text.Builder.Builder

src/Graphics/Fountainhead/Parser.hs

@@ -775,7 +775,7 @@ cmapFormat13TableP = cmapFormat12TableP
 
 cmapFormat12TableP :: Parser CmapFormat12Table
 cmapFormat12TableP = do
-    Megaparsec.takeP Nothing 6 -- Reserved and length.
+    void $ Megaparsec.takeP Nothing 6 -- Reserved and length.
     language' <- Megaparsec.Binary.word32be
     nGroups <- fromIntegral <$> Megaparsec.Binary.word32be
     groups' <- vectorNP nGroups cmapGroupP
@@ -787,7 +787,7 @@ cmapFormat12TableP = do
 
 cmapFormat10TableP :: Parser CmapFormat10Table
 cmapFormat10TableP = do
-    Megaparsec.takeP Nothing 2 -- Reserved.
+    void $ Megaparsec.takeP Nothing 2 -- Reserved.
     length' <- fromIntegral <$> Megaparsec.Binary.word32be
     language' <- Megaparsec.Binary.word32be
     startCharCode' <- Megaparsec.Binary.word32be
@@ -804,7 +804,7 @@ cmapFormat10TableP = do
 
 cmapFormat8TableP :: Parser CmapFormat8Table
 cmapFormat8TableP = do
-    Megaparsec.takeP Nothing 6 -- Reserved and length.
+    void $ Megaparsec.takeP Nothing 6 -- Reserved and length.
     language' <- Megaparsec.Binary.word32be
     is32' <- Megaparsec.takeP Nothing 65536
     nGroups <- fromIntegral <$> Megaparsec.Binary.word32be
@@ -824,7 +824,7 @@ cmapGroupP = CmapGroup
 
 cmapFormat6TableP :: Parser CmapFormat6Table
 cmapFormat6TableP = do
-    Megaparsec.Binary.word16be -- Length.
+    void Megaparsec.Binary.word16be -- Length.
     language' <- Megaparsec.Binary.word16be
     firstCode' <- Megaparsec.Binary.word16be
     entryCount' <- fromIntegral <$> Megaparsec.Binary.word16be