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|
{-# OPTIONS_GHC -fglasgow-exts #-}
-----------------------------------------------------------------------------
-- |
-- Module : Graphics.X11.Xlib.Types
-- Copyright : (c) Alastair Reid, 1999-2003
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
-- A collection of type declarations for interfacing with Xlib.
--
-----------------------------------------------------------------------------
-- #hide
module Graphics.X11.Xlib.Types(
Display(..), Screen(..), Visual, GC, GCValues, SetWindowAttributes,
Image(..), Point(..), Rectangle(..), Arc(..), Segment(..), Color(..),
Pixel, Position, Dimension, Angle, ScreenNumber, Buffer
) where
-- import Control.Monad( zipWithM_ )
import Data.Int
import Data.Word
import Foreign.C.Types
-- import Foreign.Marshal.Alloc( allocaBytes )
import Foreign.Ptr
import Foreign.Storable( Storable(..) )
#if __GLASGOW_HASKELL__
import Data.Generics
#endif
#include "HsXlib.h"
----------------------------------------------------------------
-- Types
----------------------------------------------------------------
-- | pointer to an X11 @Display@ structure
newtype Display = Display (Ptr Display)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @Screen@ structure
newtype Screen = Screen (Ptr Screen)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @Visual@ structure
newtype Visual = Visual (Ptr Visual)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @GC@ structure
newtype GC = GC (Ptr GC)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @XGCValues@ structure
newtype GCValues = GCValues (Ptr GCValues)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @XSetWindowAttributes@ structure
newtype SetWindowAttributes = SetWindowAttributes (Ptr SetWindowAttributes)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
-- | pointer to an X11 @XImage@ structure
newtype Image = Image (Ptr Image)
#if __GLASGOW_HASKELL__
deriving (Eq, Ord, Show, Typeable, Data)
#else
deriving (Eq, Ord, Show)
#endif
type Pixel = #{type unsigned long}
type Position = #{type int}
type Dimension = #{type unsigned int}
type Angle = CInt
type ScreenNumber = Word32
type Buffer = CInt
----------------------------------------------------------------
-- Short forms used in structs
----------------------------------------------------------------
type ShortPosition = CShort
type ShortDimension = CUShort
type ShortAngle = CShort
peekPositionField :: Ptr a -> CInt -> IO Position
peekPositionField ptr off = do
v <- peekByteOff ptr (fromIntegral off)
return (fromIntegral (v::ShortPosition))
peekDimensionField :: Ptr a -> CInt -> IO Dimension
peekDimensionField ptr off = do
v <- peekByteOff ptr (fromIntegral off)
return (fromIntegral (v::ShortDimension))
peekAngleField :: Ptr a -> CInt -> IO Angle
peekAngleField ptr off = do
v <- peekByteOff ptr (fromIntegral off)
return (fromIntegral (v::ShortAngle))
pokePositionField :: Ptr a -> CInt -> Position -> IO ()
pokePositionField ptr off v =
pokeByteOff ptr (fromIntegral off) (fromIntegral v::ShortPosition)
pokeDimensionField :: Ptr a -> CInt -> Dimension -> IO ()
pokeDimensionField ptr off v =
pokeByteOff ptr (fromIntegral off) (fromIntegral v::ShortDimension)
pokeAngleField :: Ptr a -> CInt -> Angle -> IO ()
pokeAngleField ptr off v =
pokeByteOff ptr (fromIntegral off) (fromIntegral v::ShortAngle)
----------------------------------------------------------------
-- Point
----------------------------------------------------------------
-- | counterpart of an X11 @XPoint@ structure
data Point = Point { pt_x :: !Position, pt_y :: !Position }
#if __GLASGOW_HASKELL__
deriving (Eq, Show, Typeable, Data)
#else
deriving (Eq, Show)
#endif
instance Storable Point where
sizeOf _ = #{size XPoint}
alignment _ = alignment (undefined::CInt)
peek p = do
x <- peekPositionField p #{offset XPoint,x}
y <- peekPositionField p #{offset XPoint,y}
return (Point x y)
poke p (Point x y) = do
pokePositionField p #{offset XPoint,x} x
pokePositionField p #{offset XPoint,y} y
----------------------------------------------------------------
-- Rectangle
----------------------------------------------------------------
-- | counterpart of an X11 @XRectangle@ structure
data Rectangle = Rectangle {
rect_x :: !Position,
rect_y :: !Position,
rect_width :: !Dimension,
rect_height :: !Dimension
}
#if __GLASGOW_HASKELL__
deriving (Eq, Read, Show, Typeable, Data)
#else
deriving (Eq, Read, Show)
#endif
instance Storable Rectangle where
sizeOf _ = #{size XRectangle}
alignment _ = alignment (undefined::CInt)
peek p = do
x <- peekPositionField p #{offset XRectangle,x}
y <- peekPositionField p #{offset XRectangle,y}
width <- peekDimensionField p #{offset XRectangle,width}
height <- peekDimensionField p #{offset XRectangle,height}
return (Rectangle x y width height)
poke p (Rectangle x y width height) = do
pokePositionField p #{offset XRectangle,x} x
pokePositionField p #{offset XRectangle,y} y
pokeDimensionField p #{offset XRectangle,width} width
pokeDimensionField p #{offset XRectangle,height} height
----------------------------------------------------------------
-- Arc
----------------------------------------------------------------
-- | counterpart of an X11 @XArc@ structure
data Arc = Arc {
arc_x :: Position,
arc_y :: Position,
arc_width :: Dimension,
arc_height :: Dimension,
arc_angle1 :: Angle,
arc_angle2 :: Angle
}
#if __GLASGOW_HASKELL__
deriving (Eq, Show, Typeable)
#else
deriving (Eq, Show)
#endif
instance Storable Arc where
sizeOf _ = #{size XArc}
alignment _ = alignment (undefined::CInt)
peek p = do
x <- peekPositionField p #{offset XArc,x}
y <- peekPositionField p #{offset XArc,y}
width <- peekDimensionField p #{offset XArc,width}
height <- peekDimensionField p #{offset XArc,height}
angle1 <- peekAngleField p #{offset XArc,angle1}
angle2 <- peekAngleField p #{offset XArc,angle2}
return (Arc x y width height angle1 angle2)
poke p (Arc x y width height angle1 angle2) = do
pokePositionField p #{offset XArc,x} x
pokePositionField p #{offset XArc,y} y
pokeDimensionField p #{offset XArc,width} width
pokeDimensionField p #{offset XArc,height} height
pokeAngleField p #{offset XArc,angle1} angle1
pokeAngleField p #{offset XArc,angle2} angle2
----------------------------------------------------------------
-- Segment
----------------------------------------------------------------
-- | counterpart of an X11 @XSegment@ structure
data Segment = Segment {
seg_x1 :: Position,
seg_y1 :: Position,
seg_x2 :: Position,
seg_y2 :: Position
}
#if __GLASGOW_HASKELL__
deriving (Eq, Show, Typeable, Data)
#else
deriving (Eq, Show)
#endif
instance Storable Segment where
sizeOf _ = #{size XSegment}
alignment _ = alignment (undefined::CInt)
peek p = do
x1 <- peekPositionField p #{offset XSegment,x1}
y1 <- peekPositionField p #{offset XSegment,y1}
x2 <- peekPositionField p #{offset XSegment,x2}
y2 <- peekPositionField p #{offset XSegment,y2}
return (Segment x1 y1 x2 y2)
poke p (Segment x1 y1 x2 y2) = do
pokePositionField p #{offset XSegment,x1} x1
pokePositionField p #{offset XSegment,y1} y1
pokePositionField p #{offset XSegment,x2} x2
pokePositionField p #{offset XSegment,y2} y2
----------------------------------------------------------------
-- Color
----------------------------------------------------------------
-- | counterpart of an X11 @XColor@ structure
data Color = Color {
color_pixel :: Pixel,
color_red :: Word16,
color_green :: Word16,
color_blue :: Word16,
color_flags :: Word8
}
#if __GLASGOW_HASKELL__
deriving (Eq, Show, Typeable, Data)
#else
deriving (Eq, Show)
#endif
instance Storable Color where
sizeOf _ = #{size XColor}
alignment _ = alignment (undefined::CInt)
peek p = do
pixel <- #{peek XColor,pixel} p
red <- #{peek XColor,red} p
green <- #{peek XColor,green} p
blue <- #{peek XColor,blue} p
flags <- #{peek XColor,flags} p
return (Color pixel red green blue flags)
poke p (Color pixel red green blue flags) = do
#{poke XColor,pixel} p pixel
#{poke XColor,red} p red
#{poke XColor,green} p green
#{poke XColor,blue} p blue
#{poke XColor,flags} p flags
----------------------------------------------------------------
-- End
----------------------------------------------------------------
|
