diff options
Diffstat (limited to 'src/MinXft.hsc')
| -rw-r--r-- | src/MinXft.hsc | 116 |
1 files changed, 114 insertions, 2 deletions
diff --git a/src/MinXft.hsc b/src/MinXft.hsc index b2299af..148efe7 100644 --- a/src/MinXft.hsc +++ b/src/MinXft.hsc @@ -1,8 +1,7 @@ -{-# LANGUAGE ForeignFunctionInterface #-} ------------------------------------------------------------------------------ -- | -- Module: MinXft --- Copyright: (c) 2012, 2014 Jose Antonio Ortega Ruiz +-- Copyright: (c) 2012, 2014, 2015 Jose Antonio Ortega Ruiz -- (c) Clemens Fruhwirth <clemens@endorphin.org> 2007 -- License: BSD3-style (see LICENSE) -- @@ -19,6 +18,8 @@ -- ------------------------------------------------------------------------------ +{-# LANGUAGE ForeignFunctionInterface, EmptyDataDecls #-} + module MinXft ( AXftColor , AXftDraw (..) , AXftFont @@ -27,6 +28,7 @@ module MinXft ( AXftColor , withAXftDraw , drawXftString , drawXftString' + , drawBackground , drawXftRect , openAXftFont , closeAXftFont @@ -45,6 +47,7 @@ where import Graphics.X11 import Graphics.X11.Xlib.Types import Graphics.X11.Xrender +import Graphics.X11.Xlib.Extras (xGetWindowProperty, xFree) import Foreign import Foreign.C.Types @@ -52,6 +55,8 @@ import Foreign.C.String import Codec.Binary.UTF8.String as UTF8 import Data.Char (ord) +import Control.Monad (when) + #include <X11/Xft/Xft.h> -- Color Handling @@ -219,3 +224,110 @@ drawXftRect :: (Integral a3, Integral a2, Integral a1, Integral a) => AXftDraw -> AXftColor -> a -> a1 -> a2 -> a3 -> IO () drawXftRect draw color x y width height = cXftDrawRect draw color (fi x) (fi y) (fi width) (fi height) + +#include <X11/extensions/Xrender.h> + +type Picture = XID +type PictOp = CInt + +data XRenderPictFormat +data XRenderPictureAttributes = XRenderPictureAttributes + +-- foreign import ccall unsafe "X11/extensions/Xrender.h XRenderFillRectangle" + -- xRenderFillRectangle :: Display -> PictOp -> Picture -> Ptr XRenderColor -> CInt -> CInt -> CUInt -> CUInt -> IO () +foreign import ccall unsafe "X11/extensions/Xrender.h XRenderComposite" + xRenderComposite :: Display -> PictOp -> Picture -> Picture -> Picture -> CInt -> CInt -> CInt -> CInt -> CInt -> CInt -> CUInt -> CUInt -> IO () +foreign import ccall unsafe "X11/extensions/Xrender.h XRenderCreateSolidFill" + xRenderCreateSolidFill :: Display -> Ptr XRenderColor -> IO Picture +foreign import ccall unsafe "X11/extensions/Xrender.h XRenderFreePicture" + xRenderFreePicture :: Display -> Picture -> IO () +foreign import ccall unsafe "string.h" memset :: Ptr a -> CInt -> CSize -> IO () +foreign import ccall unsafe "X11/extensions/Xrender.h XRenderFindStandardFormat" + xRenderFindStandardFormat :: Display -> CInt -> IO (Ptr XRenderPictFormat) +foreign import ccall unsafe "X11/extensions/Xrender.h XRenderCreatePicture" + xRenderCreatePicture :: Display -> Drawable -> Ptr XRenderPictFormat -> CULong -> Ptr XRenderPictureAttributes -> IO Picture + + +-- Attributes not supported +instance Storable XRenderPictureAttributes where + sizeOf _ = #{size XRenderPictureAttributes} + alignment _ = alignment (undefined :: CInt) + peek _ = return XRenderPictureAttributes + poke p XRenderPictureAttributes = do + memset p 0 #{size XRenderPictureAttributes} + +-- | Convenience function, gives us an XRender handle to a traditional +-- Pixmap. Don't let it escape. +withRenderPicture :: Display -> Drawable -> (Picture -> IO a) -> IO () +withRenderPicture d p f = do + format <- xRenderFindStandardFormat d 1 -- PictStandardRGB24 + alloca $ \attr -> do + pic <- xRenderCreatePicture d p format 0 attr + f pic + xRenderFreePicture d pic + +-- | Convenience function, gives us an XRender picture that is a solid +-- fill of color 'c'. Don't let it escape. +withRenderFill :: Display -> XRenderColor -> (Picture -> IO a) -> IO () +withRenderFill d c f = do + pic <- with c (xRenderCreateSolidFill d) + f pic + xRenderFreePicture d pic + +-- | Drawing the background to a pixmap and taking into account +-- transparency +drawBackground :: Display -> Drawable -> String -> Int -> Rectangle -> IO () +drawBackground d p bgc alpha (Rectangle x y wid ht) = do + let render opt bg pic m = + xRenderComposite d opt bg m pic + (fromIntegral x) (fromIntegral y) 0 0 + 0 0 (fromIntegral wid) (fromIntegral ht) + withRenderPicture d p $ \pic -> do + -- Handle background color + bgcolor <- parseRenderColor d bgc + withRenderFill d bgcolor $ \bgfill -> + withRenderFill d + (XRenderColor 0 0 0 (257 * alpha)) + (render pictOpSrc bgfill pic) + -- Handle transparency + internAtom d "_XROOTPMAP_ID" False >>= \xid -> + let xroot = defaultRootWindow d in + alloca $ \x1 -> + alloca $ \x2 -> + alloca $ \x3 -> + alloca $ \x4 -> + alloca $ \pprop -> do + xGetWindowProperty d xroot xid 0 1 False 20 x1 x2 x3 x4 pprop + prop <- peek pprop + when (prop /= nullPtr) $ do + rootbg <- peek (castPtr prop) :: IO Pixmap + xFree prop + withRenderPicture d rootbg $ \bgpic -> + withRenderFill d (XRenderColor 0 0 0 (0xFFFF - 257 * alpha)) + (render pictOpAdd bgpic pic) + +-- | Parses color into XRender color (allocation not necessary!) +parseRenderColor :: Display -> String -> IO XRenderColor +parseRenderColor d c = do + let colormap = defaultColormap d (defaultScreen d) + Color _ red green blue _ <- parseColor d colormap c + return $ XRenderColor (fromIntegral red) (fromIntegral green) (fromIntegral blue) 0xFFFF + +pictOpSrc, pictOpAdd :: PictOp +pictOpSrc = 1 +pictOpAdd = 12 + +-- pictOpMinimum = 0 +-- pictOpClear = 0 +-- pictOpDst = 2 +-- pictOpOver = 3 +-- pictOpOverReverse = 4 +-- pictOpIn = 5 +-- pictOpInReverse = 6 +-- pictOpOut = 7 +-- pictOpOutReverse = 8 +-- pictOpAtop = 9 +-- pictOpAtopReverse = 10 +-- pictOpXor = 11 +-- pictOpSaturate = 13 +-- pictOpMaximum = 13 |