137 lines
4.4 KiB
Haskell
137 lines
4.4 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE BangPatterns #-}
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{-# LANGUAGE ExplicitForAll #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE TypeApplications #-}
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module Affection
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( withAffection
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, get
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, put
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, liftIO
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, module A
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) where
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import SDL (($=))
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import qualified SDL
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import qualified SDL.Raw.Video as SDL (glSetAttribute)
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import qualified SDL.Raw.Enum as SDL
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import System.Clock
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import Control.Monad.Loops
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import Control.Monad.State.Strict
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import Control.Monad.IO.Class (liftIO)
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import Foreign.C.Types (CInt(..))
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import Affection.Types as A
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import Affection.Class as A
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import Affection.StateMachine as A
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import Affection.Util as A
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import Affection.MessageBus as A
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import Affection.Subsystems as A
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import Affection.Logging as A
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import qualified Graphics.Rendering.OpenGL as GL (clear, flush, ClearBuffer(..))
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-- | Main function which bootstraps everything else.
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withAffection
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:: forall us. (Affectionate us)
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=> AffectionConfig us -- ^ Configuration of the Game and its engine.
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-> IO ()
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withAffection AffectionConfig{..} = do
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liftIO $ logIO Debug "Affection starting"
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liftIO $ logIO Debug "Initializing SDL"
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-- intialiaze SDL
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case initComponents of
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All ->
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SDL.initializeAll
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Only is ->
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SDL.initialize is
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-- give SDL render quality
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SDL.HintRenderScaleQuality SDL.$= SDL.ScaleLinear
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-- just checking…
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do
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renderQuality <- SDL.get SDL.HintRenderScaleQuality
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when (renderQuality /= SDL.ScaleLinear) $
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logIO Warn "Linear texture filtering not enabled!"
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-- construct window
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liftIO $ logIO Debug "Creating Window(s)"
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windows <- zip3 (map (\(x,_,_) -> x) windowConfigs) <$>
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mapM
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(\wc -> SDL.createWindow windowTitle ((\(_,y,_) -> y) wc))
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windowConfigs <*>
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pure (map (\(_,_,z) -> z) windowConfigs)
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mapM_ (SDL.showWindow . (\(_,y,_) -> y)) windows
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_ <- SDL.glSetAttribute SDL.SDL_GL_SHARE_WITH_CURRENT_CONTEXT 1
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contexts <- zip (map (\(x,_,_) -> x) windows) <$>
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mapM (SDL.glCreateContext . (\(_,y,_) -> y)) windows
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-- let SDL.V2 (CInt rw) (CInt rh) = SDL.windowInitialSize windowConfigs
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-- (w, h) = case canvasSize of
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-- Just (cw, ch) -> (cw, ch)
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-- Nothing -> (fromIntegral rw, fromIntegral rh)
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mapM_ (\w -> flip SDL.setWindowMode ((\(_,_,z) -> z) w) ((\(_,y,_) -> y) w)) windows
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-- SDL.swapInterval $= SDL.SynchronizedUpdates -- <- causes Problems with windows
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liftIO $ logIO Debug "Getting Time"
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-- get current time
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execTime <- getTime Monotonic
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liftIO $ logIO Debug "Loading initial data container"
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gameData <- loadState @us
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let initContainer = AffectionData
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{ drawWindows = windows
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, glContext = contexts
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, elapsedTime = 0
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, deltaTime = 0
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, sysTime = execTime
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, pausedTime = False
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}
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(_, nState) <- runStateT ( A.runState $ do
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liftIO $ logIO Debug "Starting Loop"
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preLoop gameData
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whileM_ (hasNextStep gameData)
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(do
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-- get state
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ad <- get
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-- Measure time difference form last run
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now <- liftIO $ getTime Monotonic
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let lastTime = sysTime ad
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-- compute dt and update elapsedTime
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let !dt = fromIntegral
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(toNanoSecs $ diffTimeSpec lastTime now) / (10 ^ (9 :: Int))
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!ne = elapsedTime ad + dt
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put $ ad
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{ elapsedTime = ne
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, deltaTime = dt
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}
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-- poll events
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evs <- preHandleEvents =<< liftIO SDL.pollEvents
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-- handle events
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handleEvents gameData evs
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-- execute user defined update loop
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unless (pausedTime ad) (update gameData dt)
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-- execute user defined draw loop
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liftIO $ GL.clear [GL.ColorBuffer, GL.DepthBuffer, GL.StencilBuffer]
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draw gameData
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liftIO GL.flush
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-- actual displaying of newly drawn frame
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mapM_ (SDL.glSwapWindow . (\(_,y,_) -> y)) windows
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-- save new time
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ad3 <- get
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when (sysTime ad == sysTime ad3) (
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put ad3
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{ sysTime = now
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}
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)
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)
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) initContainer
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liftIO $ logIO Debug "Loop ended. Cleaning"
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cleanUp gameData
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liftIO $ logIO Debug "Destroying Window"
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mapM_ (SDL.glDeleteContext . snd) contexts
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mapM_ (SDL.destroyWindow . (\(_,y,_) -> y)) windows
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-- SDL.quit -- <- This causes segfaults depending on hardware
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liftIO $ logIO Debug "This is the end"
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