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module GLX ( glxDriver
) where
import GLDriver
import Bindings.GLX
import Control.Monad (when, unless)
import Data.Bits ((.|.))
import Graphics.X11.Types
import Graphics.X11.Xlib.Display (defaultScreen, openDisplay, rootWindow)
import Graphics.X11.Xlib.Event (allocaXEvent, nextEvent, get_Window, get_EventType)
import Graphics.X11.Xlib.Types
import Graphics.X11.Xlib.Window (mapWindow)
import Foreign.Marshal.Utils (with)
import Foreign.Ptr
import Foreign.Storable
data GLX = GLX Bool
glxDriver :: GLX
glxDriver = GLX False
instance GLDriver GLX where
initialized (GLX inited) = inited
initGL (GLX inited) = do
when (inited) $ fail "GLX already initialized"
disp <- openDisplay ""
fbconfigs <- chooseFBConfig disp (fromIntegral . defaultScreen $ disp)
[(glxRenderType, glxRgbaBit)
, (glxDrawableType, glxWindowBit)
, (glxXRenderable, glxTrue)
, (glxDepthSize, 1)
, (glxStencilSize, 1)
]
visualinfo <- getVisualFromFBConfig disp (head fbconfigs)
rootwindow <- rootWindow disp (fromIntegral $ vi_screen visualinfo)
cmap <- createColormap disp rootwindow (vi_visual visualinfo) allocNone
let swa = nullSetWindowAttributes {swa_colormap = cmap, swa_event_mask = structureNotifyMask .|. keyPressMask .|. keyReleaseMask}
wnd <- with swa $ \swaptr -> createWindow disp rootwindow 0 0 800 600 0 (fromIntegral $ vi_depth visualinfo) inputOutput (vi_visual visualinfo) (cWBorderPixel.|.cWColormap.|.cWEventMask) swaptr
mapWindow disp wnd
waitForMapNotify disp wnd
ctx <- with visualinfo $ \vi -> glXCreateContext disp vi (GLXContext nullPtr) True
glXMakeCurrent disp wnd ctx
return (GLX True)
deinitGL _ = return ()
nextEvent _ = return Nothing
waitForMapNotify :: Display -> Window -> IO ()
waitForMapNotify disp wnd = allocaXEvent waitForMapNotify'
where
waitForMapNotify' event = do
Graphics.X11.Xlib.Event.nextEvent disp event
window <- get_Window event
eventType <- get_EventType event
unless (window == wnd && eventType == mapNotify) $
waitForMapNotify' event
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