tracer/src/Init.hs

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{-# LANGUAGE ForeignFunctionInterface #-}
module Init where
import Affection as A
import NanoVG hiding (V2(..), V3(..))
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import NanoVG.Internal.Image (ImageFlags(..))
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import Codec.Picture as CP
import Codec.Picture.Extra
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import Control.Concurrent.STM
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import Data.String
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import qualified Data.Set as S
import qualified Data.Map.Strict as M
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import Data.ByteString.Lazy (toStrict)
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import System.Exit (exitFailure)
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import Foreign.C.Types (CInt(..))
import Types
foreign import ccall unsafe "glewInit"
glewInit :: IO CInt
init :: IO UserData
init = do
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subs <- Subsystems
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<$> (SubWindow <$> newTVarIO [])
<*> (SubMouse <$> newTVarIO [])
<*> (SubKeyboard <$> newTVarIO [])
<*> (SubJoypad <$> newTVarIO [])
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<*> (SubTranslator <$> newTVarIO [])
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_ <- glewInit
nvg <- createGL3 (S.fromList [NanoVG.Debug, Antialias, StencilStrokes])
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return UserData
{ state = Load
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, subsystems = subs
, assetImages = M.empty
, assetAnimations = M.empty
, assetFonts = M.empty
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, assetIcons = M.empty
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, nano = nvg
, uuid = []
, stateData = None
, threadContext = Nothing
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, controls = NoController
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, translation = NoTranslation
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, joyCache = []
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}
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loadPlayerSprite
:: FilePath -- Path to spritemap
-> Int -- width of single sprite
-> Int -- height of single sprite
-> Context -- Nanovg context
-> [(Int, [ImgId])] -- [(picture row, Image IDs)]
-> IO [(ImgId, NanoVG.Image)]
loadPlayerSprite fp w h nvg rids = do
eimg <- readImage fp
case eimg of
Left err -> do
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logIO Error (fromString err)
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exitFailure
Right dimg -> do
let img = convertRGBA8 dimg
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ret <- mapM (\(row, ids) ->
mapM (\(num, i) -> do
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let cr = crop (num * w) (row * h) w h img
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mresimg <-
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createImageMem nvg ImagePremultiplied (toStrict $ encodePng cr)
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case mresimg of
Nothing -> do
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logIO
Error
("Failed to load: " <>
fromString fp <>
" " <>
fromString (show i)
)
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exitFailure
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Just resimg -> return (i, resimg)
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) (zip [0..] ids)
) rids
return $ concat ret