blob: 05d3d031c56a72cdcbf0b5551037047905af9e4d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
{-# LANGUAGE LambdaCase #-}
module Draw where
import Control.Concurrent
import Data.Int
import Data.IORef
import Data.GI.Base.ManagedPtr (newManagedPtr)
import Foreign.Ptr
import GI.Gdk.Objects
import GI.Gtk
import System.IO
data Realized = Realized
{
}
data State = State
{ stRealized :: MVar Realized
}
initState :: IO State
initState = do
r <- newEmptyMVar
return State
{ stRealized = r
}
realize :: State -> GLArea -> IO ()
realize st glarea = gLAreaMakeCurrent glarea >> gLAreaGetError glarea >>= \me ->
maybe id (\e _ -> print e) me $ do
_ <- tryTakeMVar (stRealized st)
putMVar (stRealized st) $ Realized
unrealize :: State -> GLArea -> IO ()
unrealize st glarea = do
_ <- tryTakeMVar (stRealized st)
return ()
onResize :: State -> GLArea -> Int32 -> Int32 -> IO ()
onResize st glarea w h = do
return ()
render :: State -> GLArea -> GLContext -> IO Bool
render st glarea gl = do
return True
createContext :: State -> GLArea -> IO GLContext
createContext st glarea = do
widgetGetWindow glarea >>= \case
Just win -> windowCreateGlContext win
Nothing -> do
oops "createContext: GLArea has no window."
mp <- newManagedPtr nullPtr (return ())
return $ GLContext mp
oops :: String -> IO ()
oops s = hPutStrLn stderr s
|
