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{-# LANGUAGE CPP #-}
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.X11.Draw
-- Copyright: (c) 2022 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: unportable
-- Created: Fri Sep 09, 2022 02:03
--
-- Drawing the xmobar contents using Cairo and Pango
--
--
------------------------------------------------------------------------------
module Xmobar.X11.Draw (draw) where
import qualified Data.Map as M
import Control.Monad.IO.Class (liftIO)
import Control.Monad.Reader (ask)
import Foreign.C.Types as FT
import qualified Graphics.X11.Xlib as X11
import qualified Xmobar.Config.Types as C
import qualified Xmobar.Draw.Types as D
import qualified Xmobar.Draw.Cairo as DC
import qualified Xmobar.X11.Bitmap as B
import qualified Xmobar.X11.Types as T
import qualified Xmobar.X11.CairoSurface as CS
#ifdef XRENDER
import qualified Xmobar.X11.XRender as XRender
#endif
drawXBitmap :: T.XConf -> X11.GC -> X11.Pixmap -> D.IconDrawer
drawXBitmap xconf gc p h v path = do
let disp = T.display xconf
conf = T.config xconf
fc = C.fgColor conf
bc = C.bgColor conf
case M.lookup path (T.iconCache xconf) of
Just bm -> liftIO $ B.drawBitmap disp p gc fc bc (round h) (round v) bm
Nothing -> return ()
lookupXBitmap :: T.XConf -> String -> (Double, Double)
lookupXBitmap xconf path =
case M.lookup path (T.iconCache xconf) of
Just bm -> (fromIntegral (B.width bm), fromIntegral (B.height bm))
Nothing -> (0, 0)
withPixmap :: X11.Display -> X11.Drawable -> X11.Rectangle -> FT.CInt
-> (X11.GC -> X11.Pixmap -> IO a) -> IO a
withPixmap disp win (X11.Rectangle _ _ w h) depth action = do
p <- X11.createPixmap disp win w h depth
gc <- X11.createGC disp win
X11.setGraphicsExposures disp gc False
res <- action gc p
-- copy the pixmap with the new string to the window
X11.copyArea disp p win gc 0 0 w h 0 0
-- free up everything (we do not want to leak memory!)
X11.freeGC disp gc
X11.freePixmap disp p
-- resync (discard events, we don't read/process events from this display conn)
X11.sync disp True
return res
draw :: [[C.Segment]] -> T.X [D.ActionPos]
draw segments = do
xconf <- ask
let disp = T.display xconf
win = T.window xconf
rect@(X11.Rectangle _ _ w h) = T.rect xconf
screen = X11.defaultScreenOfDisplay disp
depth = X11.defaultDepthOfScreen screen
vis = X11.defaultVisualOfScreen screen
conf = T.config xconf
liftIO $ withPixmap disp win rect depth $ \gc p -> do
let bdraw = drawXBitmap xconf gc p
blook = lookupXBitmap xconf
dctx = D.DC bdraw blook conf (fromIntegral w) (fromIntegral h) segments
render = DC.drawSegments dctx
#ifdef XRENDER
color = C.bgColor conf
alph = C.alpha conf
XRender.drawBackground disp p color alph (X11.Rectangle 0 0 w h)
#endif
CS.withXlibSurface disp p vis (fromIntegral w) (fromIntegral h) render
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