VideoRectangle.hs


{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

Helper structure representing a rectangular area.
-}

module GI.GstVideo.Structs.VideoRectangle
    ( 

-- * Exported types
    VideoRectangle(..)                      ,
    newZeroVideoRectangle                   ,
    noVideoRectangle                        ,


 -- * Properties
-- ** H
    videoRectangleReadH                     ,


-- ** W
    videoRectangleReadW                     ,


-- ** X
    videoRectangleReadX                     ,


-- ** Y
    videoRectangleReadY                     ,




    ) where

import Prelude ()
import Data.GI.Base.ShortPrelude

import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map

import GI.GstVideo.Types
import GI.GstVideo.Callbacks

newtype VideoRectangle = VideoRectangle (ForeignPtr VideoRectangle)
-- | Construct a `VideoRectangle` struct initialized to zero.
newZeroVideoRectangle :: MonadIO m => m VideoRectangle
newZeroVideoRectangle = liftIO $ callocBytes 16 >>= wrapPtr VideoRectangle

noVideoRectangle :: Maybe VideoRectangle
noVideoRectangle = Nothing

videoRectangleReadX :: VideoRectangle -> IO Int32
videoRectangleReadX s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO Int32
    return val

videoRectangleReadY :: VideoRectangle -> IO Int32
videoRectangleReadY s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 4) :: IO Int32
    return val

videoRectangleReadW :: VideoRectangle -> IO Int32
videoRectangleReadW s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 8) :: IO Int32
    return val

videoRectangleReadH :: VideoRectangle -> IO Int32
videoRectangleReadH s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 12) :: IO Int32
    return val

type family ResolveVideoRectangleMethod (t :: Symbol) (o :: *) :: * where
    ResolveVideoRectangleMethod l o = MethodResolutionFailed l o

instance (info ~ ResolveVideoRectangleMethod t VideoRectangle, MethodInfo info VideoRectangle p) => IsLabelProxy t (VideoRectangle -> p) where
    fromLabelProxy _ = overloadedMethod (MethodProxy :: MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveVideoRectangleMethod t VideoRectangle, MethodInfo info VideoRectangle p) => IsLabel t (VideoRectangle -> p) where
    fromLabel _ = overloadedMethod (MethodProxy :: MethodProxy info)
#endif