{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeFamilies #-}
module Graphics.Image.IO.Formats.Netpbm
(
PBM(..)
, PGM(..)
, PPM(..)
) where
import qualified Data.ByteString as B (ByteString)
import qualified Data.Vector.Storable as V
import Foreign.Storable (Storable)
import Graphics.Image.ColorSpace
import Graphics.Image.Interface as I
import Graphics.Image.Interface.Vector (VS)
import Graphics.Image.IO.Base
import qualified Graphics.Netpbm as PNM
data PBM = PBM deriving Show
instance ImageFormat PBM where
data SaveOption PBM
ext _ = ".pbm"
data PGM = PGM deriving Show
instance ImageFormat PGM where
data SaveOption PGM
ext _ = ".pgm"
data PPM = PPM deriving Show
instance ImageFormat PPM where
data SaveOption PPM
ext _ = ".ppm"
instance ImageFormat (Seq PBM) where
data SaveOption (Seq PBM)
ext _ = ".pbm"
instance ImageFormat (Seq PGM) where
data SaveOption (Seq PGM)
ext _ = ".pgm"
instance ImageFormat (Seq PPM) where
data SaveOption (Seq PPM)
ext _ = ".ppm"
instance Readable (Image VS Y Double) PBM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS Y Double) PGM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS Y Double) PPM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS YA Double) PPM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS RGB Double) PPM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS RGBA Double) PPM where
decode _ = fmap (ppmToImageUsing pnmDataToImage . head) . decodePnm
instance Readable (Image VS X Bit) PBM where
decode _ = either Left (ppmToImageUsing pnmDataPBMToImage . head) . decodePnm
instance Readable (Image VS Y Word8) PGM where
decode _ = either Left (ppmToImageUsing pnmDataPGM8ToImage . head) . decodePnm
instance Readable (Image VS Y Word16) PGM where
decode _ = either Left (ppmToImageUsing pnmDataPGM16ToImage . head) . decodePnm
instance Readable (Image VS RGB Word8) PPM where
decode _ = either Left (ppmToImageUsing pnmDataPPM8ToImage . head) . decodePnm
instance Readable (Image VS RGB Word16) PPM where
decode _ = either Left (ppmToImageUsing pnmDataPPM16ToImage . head) . decodePnm
instance Readable [Image VS X Bit] (Seq PBM) where
decode _ = pnmToImagesUsing pnmDataPBMToImage
instance Readable [Image VS Y Word8] (Seq PGM) where
decode _ = pnmToImagesUsing pnmDataPGM8ToImage
instance Readable [Image VS Y Word16] (Seq PGM) where
decode _ = pnmToImagesUsing pnmDataPGM16ToImage
instance Readable [Image VS RGB Word8] (Seq PPM) where
decode _ = pnmToImagesUsing pnmDataPPM8ToImage
instance Readable [Image VS RGB Word16] (Seq PPM) where
decode _ = pnmToImagesUsing pnmDataPPM16ToImage
pnmToImagesUsing :: (Int -> Int -> PNM.PpmPixelData -> Either String b)
-> B.ByteString -> Either String [b]
pnmToImagesUsing conv =
fmap (fmap (either error id . ppmToImageUsing conv)) . decodePnm
pnmDataToImage
:: (Convertible cs e, ColorSpace cs e, V.Storable (Pixel cs e)) =>
Int -> Int -> PNM.PpmPixelData -> Image VS cs e
pnmDataToImage w h (PNM.PbmPixelData v) =
convert (makeImageUnsafe (h, w) v :: Image VS X Bit)
pnmDataToImage w h (PNM.PgmPixelData8 v) =
convert (makeImageUnsafe (h, w) v :: Image VS Y Word8)
pnmDataToImage w h (PNM.PgmPixelData16 v) =
convert (makeImageUnsafe (h, w) v :: Image VS Y Word16)
pnmDataToImage w h (PNM.PpmPixelDataRGB8 v) =
convert (makeImageUnsafe (h, w) v :: Image VS RGB Word8)
pnmDataToImage w h (PNM.PpmPixelDataRGB16 v) =
convert (makeImageUnsafe (h, w) v :: Image VS RGB Word16)
makeImageUnsafe
:: (Storable a, Array VS cs e)
=> (Int, Int) -> V.Vector a -> Image VS cs e
makeImageUnsafe sz = fromVector sz . V.unsafeCast
pnmDataPBMToImage :: Int -> Int -> PNM.PpmPixelData -> Either String (Image VS X Bit)
pnmDataPBMToImage w h (PNM.PbmPixelData v) = Right $ makeImageUnsafe (h, w) v
pnmDataPBMToImage _ _ d = pnmCSError "Binary (Pixel X Bit)" d
pnmDataPGM8ToImage :: Int -> Int -> PNM.PpmPixelData -> Either String (Image VS Y Word8)
pnmDataPGM8ToImage w h (PNM.PgmPixelData8 v) = Right $ makeImageUnsafe (h, w) v
pnmDataPGM8ToImage _ _ d = pnmCSError "Y8 (Pixel Y Word8)" d
pnmDataPGM16ToImage :: Int -> Int -> PNM.PpmPixelData -> Either String (Image VS Y Word16)
pnmDataPGM16ToImage w h (PNM.PgmPixelData16 v) = Right $ makeImageUnsafe (h, w) v
pnmDataPGM16ToImage _ _ d = pnmCSError "Y16 (Pixel Y Word16)" d
pnmDataPPM8ToImage :: Int -> Int -> PNM.PpmPixelData -> Either String (Image VS RGB Word8)
pnmDataPPM8ToImage w h (PNM.PpmPixelDataRGB8 v) = Right $ makeImageUnsafe (h, w) v
pnmDataPPM8ToImage _ _ d = pnmCSError "RGB8 (Pixel RGB Word8)" d
pnmDataPPM16ToImage :: Int -> Int -> PNM.PpmPixelData -> Either String (Image VS RGB Word16)
pnmDataPPM16ToImage w h (PNM.PpmPixelDataRGB16 v) = Right $ makeImageUnsafe (h, w) v
pnmDataPPM16ToImage _ _ d = pnmCSError "RGB16 (Pixel RGB Word16)" d
ppmToImageUsing :: (Int -> Int -> PNM.PpmPixelData -> t) -> PNM.PPM -> t
ppmToImageUsing conv PNM.PPM {PNM.ppmHeader = PNM.PPMHeader {PNM.ppmWidth = w
,PNM.ppmHeight = h}
,PNM.ppmData = ppmData} = conv w h ppmData
decodePnm :: B.ByteString -> Either String [PNM.PPM]
decodePnm = pnmResultToImage . PNM.parsePPM where
pnmResultToImage (Right ([], _)) = pnmError "Unknown"
pnmResultToImage (Right (ppms, _)) = Right ppms
pnmResultToImage (Left err) = pnmError err
pnmError :: String -> Either String a
pnmError err = Left ("Netpbm decoding error: "++err)
pnmCSError :: String -> PNM.PpmPixelData -> Either String a
pnmCSError cs ppmData =
pnmError $
"Input image is in " ++
pnmShowData ppmData ++ ", cannot convert it to " ++ cs ++ " colorspace."
pnmShowData :: PNM.PpmPixelData -> String
pnmShowData (PNM.PbmPixelData _) = "Binary (Pixel X Bit)"
pnmShowData (PNM.PgmPixelData8 _) = "Y8 (Pixel Y Word8)"
pnmShowData (PNM.PgmPixelData16 _) = "Y16 (Pixel Y Word16)"
pnmShowData (PNM.PpmPixelDataRGB8 _) = "RGB8 (Pixel RGB Word8)"
pnmShowData (PNM.PpmPixelDataRGB16 _) = "RGB8 (Pixel RGB Word8)"