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{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
module Lazyfoo.Lesson05 (main) where
import Control.Monad
import Foreign.C.Types
import SDL.Vect
import qualified SDL
import Paths_sdl2 (getDataFileName)
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative
#endif
screenWidth, screenHeight :: CInt
(screenWidth, screenHeight) = (640, 480)
loadSurface :: SDL.Surface -> FilePath -> IO SDL.Surface
loadSurface screenSurface path = do
loadedSurface <- getDataFileName path >>= SDL.loadBMP
desiredFormat <- SDL.surfaceFormat screenSurface
SDL.convertSurface loadedSurface desiredFormat <* SDL.freeSurface loadedSurface
main :: IO ()
main = do
SDL.initialize [SDL.InitVideo]
window <- SDL.createWindow "SDL Tutorial" SDL.defaultWindow { SDL.windowInitialSize = V2 screenWidth screenHeight }
SDL.showWindow window
screenSurface <- SDL.getWindowSurface window
stretchedSurface <- loadSurface screenSurface "examples/lazyfoo/stretch.bmp"
let
loop = do
events <- SDL.pollEvents
let quit = elem SDL.QuitEvent $ map SDL.eventPayload events
SDL.surfaceBlitScaled stretchedSurface Nothing screenSurface Nothing
SDL.updateWindowSurface window
unless quit loop
loop
SDL.freeSurface stretchedSurface
SDL.destroyWindow window
SDL.quit
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