120 lines
3.4 KiB
Haskell
120 lines
3.4 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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import Affection
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import qualified SDL
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import qualified GEGL as G
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import qualified BABL as B
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import qualified BABL.FFI.Format as B
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import qualified Data.Map.Strict as M
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import Foreign.C.Types
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import Foreign.Ptr (castPtr, nullPtr)
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import Foreign.Marshal.Utils (new)
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import System.Random (randomRIO)
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import Control.Monad (unless)
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import Debug.Trace
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main :: IO ()
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main = do
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conf <- return $ AffectionConfig
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{ initComponents = All
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, windowTitle = "Affection: example00"
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, windowConfig = SDL.defaultWindow
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, preLoop = return ()
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, drawLoop = draw
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, updateLoop = update
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, loadState = load
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, cleanUp = clean
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}
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withAffection conf
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data UserData = UserData
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{ nodeGraph :: M.Map String G.GeglNode
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, coordinates :: Maybe (Int, Int)
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}
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load :: SDL.Surface -> IO UserData
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load surface = do
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traceM "loading"
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root <- G.gegl_node_new
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traceM "new root node"
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checkerboard <- G.gegl_node_new_child root $ G.checkerboardOperation
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[ G.Property "color1" $ G.PropertyColor $ G.RGBA 0.4 0.4 0.4 1
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, G.Property "color2" $ G.PropertyColor $ G.RGBA 0.6 0.6 0.6 1
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]
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traceM "checkerboard"
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over <- G.gegl_node_new_child root G.defaultOverOperation
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traceM "over"
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nop <- G.gegl_node_new_child root $ G.Operation "gegl:nop" []
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traceM "nop"
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crop <- G.gegl_node_new_child root $ G.Operation "gegl:crop"
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[ G.Property "x" $ G.PropertyDouble 0
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, G.Property "y" $ G.PropertyDouble 0
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, G.Property "width" $ G.PropertyDouble 800
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, G.Property "height" $ G.PropertyDouble 600
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]
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traceM "crop"
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format <- B.babl_format $ B.PixelFormat B.RGBA B.CFu8
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pixels <- liftIO $ new =<< SDL.surfacePixels surface
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sink <- G.gegl_node_new_child root $ G.Operation "gegl:buffer-sink"
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[ G.Property "buffer" $ G.PropertyPointer $ castPtr $ pixels
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, G.Property "format" $ G.PropertyPointer $ nullPtr
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]
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traceM "sink"
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G.gegl_node_link_many [checkerboard, over, crop, sink]
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diw <- G.gegl_node_connect_to nop "output" over "aux"
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unless diw (error "connect failed")
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traceM "connections made"
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myMap <- return $ M.fromList
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[ ("root" , root)
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, ("over" , over)
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, ("background" , checkerboard)
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, ("nop" , nop)
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, ("crop" , crop)
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, ("sink" , sink)
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]
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traceM "loading complete"
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return $ UserData
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{ nodeGraph = myMap
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, coordinates = Nothing
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}
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update :: Double -> AffectionState (AffectionData UserData) IO ()
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update sec = do
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traceM "updating"
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ad <- get
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ud <- getAffection
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traceM $ (show $ 1 / sec) ++ " FPS"
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ev <- liftIO $ SDL.pollEvents
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mapM_ (\e ->
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case SDL.eventPayload e of
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SDL.MouseButtonEvent dat -> do
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let (SDL.P (SDL.V2 x y)) = SDL.mouseButtonEventPos dat
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drawRect
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(nodeGraph ud M.! "nop")
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(G.RGBA 1 0 0 0.5)
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Fill
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(G.GeglRectangle (fromIntegral x - 10) (fromIntegral y - 10) 20 20)
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traceM $ "drewn a rectangle at " ++ show x ++ " " ++ show y
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SDL.WindowClosedEvent _ -> do
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traceM "seeya!"
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put $ ad
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{ quitEvent = True
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}
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_ ->
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return ()
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) ev
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draw :: Affection UserData ()
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draw = do
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ad <- get
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ud <- getAffection
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liftIO $ SDL.lockSurface $ drawSurface ad
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liftIO $ G.gegl_node_process (nodeGraph ud M.! "sink")
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liftIO $ SDL.unlockSurface $ drawSurface ad
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clean :: UserData -> IO ()
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clean _ = return ()
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