module Graphics.Gloss.Internals.Interface.Display
( display
, displayWithBackend)
where
import Graphics.Gloss.Data.Color
import Graphics.Gloss.Data.Picture
import Graphics.Gloss.Internals.Render.Picture
import Graphics.Gloss.Internals.Render.ViewPort
import Graphics.Gloss.Internals.Interface.Backend
import Graphics.Gloss.Internals.Interface.Window
import Graphics.Gloss.Internals.Interface.Common.Exit
import Graphics.Gloss.Internals.Interface.ViewPort
import Graphics.Gloss.Internals.Interface.ViewPort.KeyMouse
import Graphics.Gloss.Internals.Interface.ViewPort.Motion
import Graphics.Gloss.Internals.Interface.ViewPort.Reshape
import qualified Graphics.Gloss.Internals.Render.State as RS
import qualified Graphics.Gloss.Internals.Interface.ViewPort.ControlState as VPC
import qualified Graphics.Gloss.Internals.Interface.Callback as Callback
import Data.IORef
display :: Display
-> Color
-> Picture
-> IO ()
display = displayWithBackend defaultBackendState
displayWithBackend
:: Backend a
=> a
-> Display
-> Color
-> Picture
-> IO ()
displayWithBackend backend displayMode background picture
= do viewSR <- newIORef viewPortInit
viewControlSR <- newIORef VPC.stateInit
renderS <- RS.stateInit
renderSR <- newIORef renderS
let renderFun backendRef = do
view <- readIORef viewSR
options <- readIORef renderSR
withViewPort
backendRef
view
(renderPicture backendRef options view picture)
let callbacks
= [ Callback.Display renderFun
, Callback.Idle (\stateRef -> sleep stateRef 0.001 >> postRedisplay stateRef)
, callback_exit ()
, callback_viewPort_keyMouse viewSR viewControlSR
, callback_viewPort_motion viewSR viewControlSR
, callback_viewPort_reshape ]
createWindow backend displayMode background callbacks