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|
-----------------------------------------------------------------------------
-- |
-- Module : Graphics.UI.SDL.Framerate
-- Copyright : (c) David Himmelstrup 2005
-- License : BSD-like
--
-- Maintainer : lemmih@gmail.com
-- Stability : provisional
-- Portability : portable
--
-----------------------------------------------------------------------------
module Graphics.UI.SDL.Framerate
( new
, init
, set
, get
, delay
, FPSManager
) where
import Foreign as Foreign hiding (new)
import Foreign.C
import Prelude hiding (init)
data FPSManagerStruct
type FPSManager = ForeignPtr FPSManagerStruct
sizeOfManager :: Int
sizeOfManager = 16
new :: IO FPSManager
new = do manager <- Foreign.mallocBytes sizeOfManager >>= newForeignPtr finalizerFree
init manager
return manager
-- void SDL_initFramerate(FPSmanager * manager);
foreign import ccall unsafe "SDL_initFramerate" sdlInitFramerate :: Ptr FPSManagerStruct -> IO ()
init :: FPSManager -> IO ()
init manager
= withForeignPtr manager sdlInitFramerate
-- int SDL_setFramerate(FPSmanager * manager, int rate);
foreign import ccall unsafe "SDL_setFramerate" sdlSetFramerate :: Ptr FPSManagerStruct -> Int -> IO Int
set :: FPSManager -> Int -> IO Bool
set manager hz
= withForeignPtr manager $ \fpsPtr ->
do ret <- sdlSetFramerate fpsPtr hz
case ret of
(-1) -> return False
_ -> return True
-- int SDL_getFramerate(FPSmanager * manager);
foreign import ccall unsafe "SDL_getFramerate" sdlGetFramerate :: Ptr FPSManagerStruct -> IO Int
get :: FPSManager -> IO Int
get manager = withForeignPtr manager sdlGetFramerate
-- void SDL_framerateDelay(FPSmanager * manager);
foreign import ccall unsafe "SDL_framerateDelay" sdlFramerateDelay :: Ptr FPSManagerStruct -> IO ()
delay :: FPSManager -> IO ()
delay manager = withForeignPtr manager sdlFramerateDelay
|
