{-# LANGUAGE RecordWildCards #-} import Affection import qualified SDL import qualified GEGL as G import qualified BABL as B import qualified BABL.FFI.Format as B import qualified Data.Map.Strict as M import Foreign.C.Types import Foreign.Ptr (castPtr, nullPtr) import Foreign.Marshal.Utils (new) import System.Random (randomRIO) import Control.Monad (unless) import Debug.Trace main :: IO () main = do conf <- return $ AffectionConfig { initComponents = All , windowTitle = "Affection: example00" , windowConfig = SDL.defaultWindow , preLoop = return () , drawLoop = draw , updateLoop = update , loadState = load , cleanUp = clean } withAffection conf data UserData = UserData { nodeGraph :: M.Map String G.GeglNode , coordinates :: Maybe (Int, Int) } load :: SDL.Surface -> IO UserData load surface = 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" nop <- G.gegl_node_new_child root $ G.Operation "gegl:nop" [] traceM "nop" crop <- G.gegl_node_new_child root $ G.Operation "gegl:crop" [ G.Property "x" $ G.PropertyDouble 0 , G.Property "y" $ G.PropertyDouble 0 , G.Property "width" $ G.PropertyDouble 800 , G.Property "height" $ G.PropertyDouble 600 ] traceM "crop" format <- B.babl_format $ B.PixelFormat B.RGBA B.CFu8 pixels <- liftIO $ new =<< SDL.surfacePixels surface sink <- G.gegl_node_new_child root $ G.Operation "gegl:buffer-sink" [ G.Property "buffer" $ G.PropertyPointer $ castPtr $ pixels , G.Property "format" $ G.PropertyPointer $ nullPtr ] traceM "sink" G.gegl_node_link_many [checkerboard, over, crop, sink] diw <- G.gegl_node_connect_to nop "output" over "aux" unless diw (error "connect failed") traceM "connections made" myMap <- return $ M.fromList [ ("root" , root) , ("over" , over) , ("background" , checkerboard) , ("nop" , nop) , ("crop" , crop) , ("sink" , sink) ] traceM "loading complete" return $ UserData { nodeGraph = myMap , coordinates = Nothing } update :: Double -> AffectionState (AffectionData UserData) IO () update sec = do traceM "updating" ad <- get ud <- getAffection traceM $ (show $ 1 / sec) ++ " FPS" ev <- liftIO $ SDL.pollEvents mapM_ (\e -> case SDL.eventPayload e of SDL.MouseButtonEvent dat -> do let (SDL.P (SDL.V2 x y)) = SDL.mouseButtonEventPos dat drawRect (nodeGraph ud M.! "nop") (G.RGBA 1 0 0 0.5) Fill (G.GeglRectangle (fromIntegral x - 10) (fromIntegral y - 10) 20 20) traceM $ "drewn a rectangle at " ++ show x ++ " " ++ show y SDL.WindowClosedEvent _ -> do traceM "seeya!" put $ ad { quitEvent = True } _ -> return () ) ev draw :: Affection UserData () draw = do ad <- get ud <- getAffection liftIO $ SDL.lockSurface $ drawSurface ad liftIO $ G.gegl_node_process (nodeGraph ud M.! "sink") liftIO $ SDL.unlockSurface $ drawSurface ad clean :: UserData -> IO () clean _ = return ()