add sync and GL infos

extern/affection/src/Affection.hs

@@ -17,11 +17,21 @@ import qualified SDL
 import qualified SDL.Raw.Video as SDL (glSetAttribute)
 import qualified SDL.Raw.Enum as SDL
 
+import qualified Graphics.Rendering.OpenGL as GL (clear, flush, ClearBuffer(..))
+import qualified Graphics.GL as GLRaw
+
+import Foreign.Marshal.Array
+
+import qualified Data.ByteString as B
+import qualified Data.ByteString.Char8 as B8
+
 import System.Clock
 
 import Control.Monad.Loops
 import Control.Monad.State.Strict
 
+-- internal imports
+
 import Affection.Types as A
 import Affection.Class as A
 import Affection.StateMachine as A
@@ -31,9 +41,6 @@ import Affection.Subsystems as A
 
 import Affection.Logging as A
 
-import qualified Graphics.Rendering.OpenGL as GL (clear, flush, ClearBuffer(..))
-
-
 -- | Main function which bootstraps everything else.
 withAffection
   :: forall us. (Affectionate us)
@@ -50,6 +57,8 @@ withAffection AffectionConfig{..} = do
       SDL.initialize is
   -- give SDL render quality
   SDL.HintRenderScaleQuality SDL.$= SDL.ScaleLinear
+  -- sync updates with monitor
+  SDL.swapInterval $= SDL.SynchronizedUpdates
   -- just checking…
   do
     renderQuality <- SDL.get SDL.HintRenderScaleQuality
@@ -70,6 +79,9 @@ withAffection AffectionConfig{..} = do
   mapM_ (\w -> flip SDL.setWindowMode  ((\(_,_,z) -> z) w) ((\(_,y,_) -> y) w)) windows
   -- SDL.swapInterval $= SDL.SynchronizedUpdates -- <- causes Problems with windows
   liftIO $ logIO Debug "Getting Time"
+  -- print current used GL Version
+  version <- peerArray0 (0 :: Word8) =<< GLRaw.glGetString GLRaw.GL_VERSION
+  print (B.pack version)
   -- get current time
   execTime <- getTime Monotonic
   liftIO $ logIO Debug "Loading initial data container"