FWGL.Backend.IO

Documentation

class GLES => BackendIO where

Associated Types

type Canvas

Where to draw (e.g. a window, a HTML5 canvas).

type BackendState

Methods

loadImage

Arguments

:: FilePath

Path or URL.

-> ((Image, Int, Int) -> IO ())

Callback.

-> IO ()

loadTextFile

Arguments

:: FilePath

Path or URL.

-> (Either String String -> IO ())

Callback

-> IO ()

initBackend :: IO BackendState

createCanvas :: String -> BackendState -> IO (Canvas, Int, Int)

setCanvasSize

Arguments

:: Int

Width

-> Int

Height

-> Canvas

-> BackendState

-> IO ()

Set the size of the canvas/window.

setCanvasTitle :: String -> Canvas -> BackendState -> IO ()

Set the title of the window.

setCanvasResizeCallback :: (Int -> Int -> IO ()) -> Canvas -> BackendState -> IO ()

setCanvasRefreshCallback :: IO () -> Canvas -> BackendState -> IO ()

popInput :: a -> Canvas -> BackendState -> IO (Input a)

getInput :: a -> Canvas -> BackendState -> IO (Input a)

drawCanvas

Arguments

:: (Ctx -> IO a)

Draw action.

-> Bool

Swap buffers.

-> Canvas

-> BackendState

-> IO a

safeFork :: Ctx -> (IO () -> IO ThreadId) -> IO () -> IO ThreadId

refreshLoop

Arguments

:: Int

FPS (not necessarily used).

-> Canvas

-> BackendState

-> IO ()

getTime :: BackendState -> IO Double

Time, in seconds.

terminateBackend :: BackendState -> IO ()