{-# LANGUAGE RecordWildCards #-} import Affection import qualified SDL import qualified GEGL as G import qualified BABL as B import qualified Data.Map.Strict as M import Foreign.C.Types import Debug.Trace main :: IO () main = do conf <- return $ AffectionConfig { initComponents = All , windowTitle = "Affection: example00" , windowConfig = SDL.defaultWindow , preLoop = drawInit , drawLoop = draw , updateLoop = update , loadState = load , cleanUp = clean } withAffection conf data UserData = UserData { nodeGraph :: M.Map String G.GeglNode , foreground :: G.GeglBuffer , coordinates :: Maybe (Int, Int) } load :: SDL.Surface -> IO UserData load _ = do traceM "loading" root <- G.gegl_node_new traceM "new root node" checkerboard <- G.gegl_node_new_child root $ G.checkerboardOperation [ G.Property "color1" $ G.PropertyColor $ G.RGBA 0.4 0.4 0.4 1 , G.Property "color2" $ G.PropertyColor $ G.RGBA 0.6 0.6 0.6 1 ] traceM "checkerboard" over <- G.gegl_node_new_child root G.defaultOverOperation traceM "over" buffer <- G.gegl_buffer_new (Just $ G.GeglRectangle 0 0 800 600) =<< B.babl_format (B.PixelFormat B.RGBA B.CFfloat) bufsrc <- G.gegl_node_new_child root $ G.bufferSourceOperation [ G.Property "buffer" $ G.PropertyBuffer buffer ] traceM "buffer-source" G.gegl_node_link checkerboard over G.gegl_node_connect_to bufsrc "output" over "aux" traceM "connections made" myMap <- return $ M.fromList [ ("root" , root) , ("over" , over) , ("background" , checkerboard) , ("foreground" , bufsrc) ] traceM "loading complete" return $ UserData { nodeGraph = myMap , foreground = buffer , coordinates = Nothing } drawInit :: Affection UserData () drawInit = do UserData{..} <- getAffection present (nodeGraph M.! "over") foreground (GeglRectangle 0 0 800 600) True draw :: Affection UserData () draw = do traceM "drawing" ad <- get UserData{..} <- getAffection SDL.V2 (CInt rw) (CInt rh) <- SDL.surfaceDimensions $ drawSurface ad let (w, h) = (fromIntegral rw, fromIntegral rh) liftIO $ clearArea foreground (GeglRectangle 0 0 w h) maybe (return ()) (\(x, y) -> drawRect foreground (nodeGraph M.! "over") (G.RGBA 1 0 0 0.5) (Line 7) (G.GeglRectangle (x - 10) (y - 10) 20 20) ) coordinates update :: Double -> AffectionState (AffectionData UserData) IO () update sec = do traceM "updating" ad <- get ud <- getAffection traceM $ (show $ 1 / sec) ++ " FPS" ev <- liftIO $ SDL.pollEvent maybe (return ()) (\e -> case SDL.eventPayload e of SDL.MouseMotionEvent dat -> do let (SDL.P (SDL.V2 x y)) = SDL.mouseMotionEventPos dat putAffection $ ud { coordinates = Just (fromIntegral x, fromIntegral y) } SDL.WindowClosedEvent _ -> do traceM "seeya!" put $ ad { quitEvent = True } _ -> return () ) ev clean :: UserData -> IO () clean _ = return ()