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|
{-# OPTIONS_HADDOCK hide #-}
module Codec.BMP.BitmapInfo
( BitmapInfo (..)
, getBitmapInfoV3)
where
import Codec.BMP.BitmapInfoV3
import Codec.BMP.BitmapInfoV4
import Codec.BMP.BitmapInfoV5
import Control.Applicative
import Data.Binary
import Data.Binary.Get
-- | A wrapper for the various image header types.
--
data BitmapInfo
= InfoV3 BitmapInfoV3
| InfoV4 BitmapInfoV4
| InfoV5 BitmapInfoV5
deriving (Show)
instance Binary BitmapInfo where
get =
(do 40 <- getWord32le
info <- get
return $ InfoV3 info)
<|>
(do 108 <- getWord32le
info <- get
return $ InfoV4 info)
<|>
(do 120 <- getWord32le
info <- get
return $ InfoV5 info)
<|>
(error "Codec.BMP.BitmapInfo.get: unhandled header size")
put xx
= case xx of
InfoV3 info -> put info
InfoV4 info -> put info
InfoV5 info -> put info
-- | Get the common `BitmapInfoV3` structure from a `BitmapInfo`
getBitmapInfoV3 :: BitmapInfo -> BitmapInfoV3
getBitmapInfoV3 bi
= case bi of
InfoV3 info -> info
InfoV4 info -> dib4InfoV3 info
InfoV5 info -> dib4InfoV3 $ dib5InfoV4 info
|
