pituicat/src/Affection.hs
2016-12-21 04:29:11 +01:00

129 lines
3.7 KiB
Haskell

{-# LANGUAGE RecordWildCards #-}
module Affection
( withAffection
, getAffection
, putAffection
-- , withWindow
-- , withDefaultWindow
, delaySec
, get
, put
, module A
) where
import qualified SDL
import qualified SDL.Internal.Numbered as SDL (toNumber)
import qualified SDL.Raw as Raw
import qualified GEGL as G
import qualified Data.Text as T
import Data.Maybe
import System.Clock
import Control.Monad.Loops
import Control.Monad.State
import Control.Concurrent.MVar
import Foreign.C.Types (CInt(..))
import Foreign.Storable (peek)
import Affection.Types as A
import Affection.Draw as A
import Affection.Particle as A
import qualified BABL as B
-- | Main function which bootstraps everything else.
withAffection
:: AffectionConfig us -- ^ Configuration of the Game and its engine.
-> IO ()
withAffection AffectionConfig{..} = do
case initComponents of
All ->
SDL.initializeAll
Only is ->
SDL.initialize is
G.gegl_init
execTime <- newMVar =<< getTime Monotonic
window <- SDL.createWindow windowTitle windowConfig
oldSurf@(SDL.Surface ptr _) <- SDL.getWindowSurface window
rawSurfacePtr <- Raw.convertSurfaceFormat ptr (SDL.toNumber SDL.ABGR8888) 0
let surface = (flip SDL.Surface Nothing) rawSurfacePtr
bablFormat = B.PixelFormat B.RGBA B.CFu8
pixels <- SDL.surfacePixels surface
format <- B.babl_format bablFormat
SDL.V2 (CInt rw) (CInt rh) <- SDL.surfaceDimensions surface
pixelFormat <- peek . Raw.surfaceFormat =<< peek rawSurfacePtr
let (w, h) = (fromIntegral rw, fromIntegral rh)
stride = fromIntegral (Raw.pixelFormatBytesPerPixel pixelFormat) * w
cpp = B.babl_components_per_pixel bablFormat
initContainer <- (\x -> AffectionData
{ quitEvent = False
, userState = x
, drawWindow = window
, drawSurface = surface
, drawFormat = format
, drawStack = []
}) <$> loadState surface
(_, nState) <- runStateT ( A.runState $ do
preLoop
liftIO $ SDL.surfaceBlit surface Nothing oldSurf Nothing
whileM_ (do
current <- get
return $ not $ A.quitEvent current
)
(do
-- Measure time difference form last run
now <- liftIO $ getTime Monotonic
lastTime <- liftIO $ fromMaybe now <$> tryReadMVar execTime
-- get state
ad <- get
-- clean draw requests from last run
mapM_ (invalidateDrawRequest pixels stride cpp) $ drawStack ad
put $ ad
{ drawStack = [] }
-- execute user defined draw loop
drawLoop
-- execute user defined update loop
updateLoop $ (fromIntegral $ toNanoSecs $ diffTimeSpec lastTime now) /
(fromIntegral 10 ^ 9)
-- handle all new draw requests
ad2 <- get
clear <- catMaybes <$> mapM (handleDrawRequest pixels stride cpp) (drawStack ad2)
-- save all draw requests to clear in next run
put $ ad2
{ drawStack = clear }
-- blit surface and update window
liftIO $ SDL.surfaceBlit surface Nothing oldSurf Nothing
liftIO $ SDL.updateWindowSurface $ drawWindow ad2
-- save new time
_ <- liftIO $ swapMVar execTime $ now
return ()
)
) initContainer
G.gegl_exit
cleanUp $ userState nState
SDL.quit
-- | Return the userstate to the user
getAffection :: Affection us us
getAffection = do
ad <- get
return $ userState ad
-- | Put altered user state back
putAffection
:: us -- User state
-> Affection us ()
putAffection us = do
ad <- get
put $ ad
{ userState = us }
-- | block a thread for a specified amount of time
delaySec
:: Int -- ^ Number of seconds
-> IO ()
delaySec dur = SDL.delay (fromIntegral $ dur * 1000)