starting work on new example

This commit is contained in:
nek0 2016-11-18 16:27:47 +01:00
parent 7ae7c4e080
commit 04f6488a1a
2 changed files with 177 additions and 17 deletions

View file

@ -77,14 +77,19 @@ executable example00
else
buildable: False
-- executable example01
-- hs-source-dirs: examples
-- main-is: example01.hs
-- ghc-options: -threaded -Wall
-- default-language: Haskell2010
-- default-extensions: OverloadedStrings
-- if flag(examples)
-- build-depends: base
-- , affection
-- else
-- buildable: False
executable example01
hs-source-dirs: examples
main-is: example01.hs
ghc-options: -threaded -Wall
default-language: Haskell2010
default-extensions: OverloadedStrings
if flag(examples)
build-depends: base
, affection
, sdl2
, gegl
, babl
, containers
, mtl
else
buildable: False

View file

@ -1,9 +1,164 @@
{-# LANGUAGE RecordWildCards #-}
import Affection
import qualified SDL
import qualified SDL.Raw as Raw
import qualified GEGL as G
import qualified BABL as B
import qualified Data.Map.Strict as M
import Foreign.Storable (peek)
import Foreign.C.Types
import Debug.Trace
-- main :: IO ()
-- main = withAllAffection $
-- withDefaultWindow "test" $ do
-- changeColor $ RGBA 255 255 255 255
-- clear
-- present
-- liftIO $ delaySec 2
main :: IO ()
main = withAllAffection $
withDefaultWindow "test" $ do
changeColor $ RGBA 255 255 255 255
clear
present
liftIO $ delaySec 2
main = do
conf <- return $ AffectionConfig
{ initComponents = All
, windowTitle = "Affection: example00"
, windowConfig = SDL.defaultWindow
, drawLoop = draw
, updateLoop = update
, loadState = load
, cleanUp = clean
}
withAffection conf
data UserData = UserData
{ nodeGraph :: M.Map String G.GeglNode
, foreground :: G.GeglBuffer
, elapsedTime :: Double
}
load :: SDL.Surface -> IO UserData
load _ = do
traceM "loading"
root <- G.gegl_node_new
traceM "new root node"
checkerboard <- G.gegl_node_new_child root $ G.checkerboardOperation
[ G.Property "color1" $ G.PropertyColor $ G.RGBA 0.4 0.4 0.4 1
, G.Property "color2" $ G.PropertyColor $ G.RGBA 0.6 0.6 0.6 1
]
traceM "checkerboard"
over <- G.gegl_node_new_child root G.defaultOverOperation
traceM "over"
buffer <- G.gegl_buffer_new (G.GeglRectangle 0 0 20 20) =<<
B.babl_format (B.PixelFormat B.RGBA B.CFfloat)
bufsrc <- G.gegl_node_new_child root $ G.bufferSourceOperation
[ G.Property "buffer" $ G.PropertyBuffer buffer
]
traceM "buffer-source"
G.gegl_node_link checkerboard over
G.gegl_node_connect_to bufsrc "output" over "aux"
traceM "connections made"
myMap <- return $ M.fromList
[ ("root" , root)
, ("over" , over)
, ("background" , checkerboard)
, ("foreground" , bufsrc)
]
let roi = G.GeglRectangle 0 0 20 20
G.iterateOver
buffer
roi
(B.PixelFormat B.RGBA B.CFfloat)
G.GeglAccessReadWrite
G.GeglAbyssNone
(\(G.Pixel px py pc) ->
let dsqr = (((10 - px) ^ 2) + ((10 - py) ^ 2))
(G.CVfloat (CFloat pr), G.CVfloat (CFloat pg), G.CVfloat (CFloat pb), G.CVfloat (CFloat pa)) = pc
dist = (sqrt (fromIntegral dsqr :: Float))
in if dsqr < 100
then
if dist < fromIntegral 9
then
G.Pixel px py
( G.CVfloat $ CFloat 0
, G.CVfloat $ CFloat 0
, G.CVfloat $ CFloat 0
, G.CVfloat $ CFloat $ if pa < 1 then 1 else pa
)
else
let alpha = fromIntegral 10 - dist
dst_a = pa
a = alpha + dst_a * (1 - alpha)
a_term = dst_a * (1 - alpha)
red = 0 * alpha + pr * a_term
gre = 0 * alpha + pg * a_term
blu = 0 * alpha + pb * a_term
in
G.Pixel px py
( G.CVfloat $ CFloat $ red / a
, G.CVfloat $ CFloat $ gre / a
, G.CVfloat $ CFloat $ blu / a
, G.CVfloat $ CFloat $ if pa < alpha then alpha else pa
)
else
G.Pixel px py pc
)
traceM "loading complete"
return $ UserData
{ nodeGraph = myMap
, foreground = buffer
, elapsedTime = 0
}
draw :: AffectionState (AffectionData UserData) IO ()
draw = do
traceM "drawing"
AffectionData{..} <- get
let UserData{..} = userState
liftIO $ SDL.lockSurface drawSurface
pixels <- liftIO $ SDL.surfacePixels drawSurface
let SDL.Surface rawSurfacePtr _ = drawSurface
rawSurface <- liftIO $ peek rawSurfacePtr
pixelFormat <- liftIO $ peek $ Raw.surfaceFormat rawSurface
format <- liftIO $ (B.babl_format $ B.PixelFormat B.RGBA B.CFu8)
SDL.V2 (CInt rw) (CInt rh) <- SDL.surfaceDimensions drawSurface
let (w, h) = (fromIntegral rw, fromIntegral rh)
liftIO $ G.gegl_node_blit
(nodeGraph M.! "over" :: G.GeglNode)
1
(G.GeglRectangle 0 0 w h)
format
pixels
(fromIntegral (Raw.pixelFormatBytesPerPixel pixelFormat) * w)
[G.GeglBlitDefault]
liftIO $ SDL.unlockSurface drawSurface
liftIO $ SDL.updateWindowSurface drawWindow
update :: Double -> AffectionState (AffectionData UserData) IO ()
update sec = do
traceM "updating"
-- liftIO $ delaySec 5
ad@AffectionData{..} <- get
let ud@UserData{..} = userState
traceM $ show elapsedTime
if elapsedTime < 5
then do
fg <- liftIO $ G.gegl_buffer_get_extent foreground
_ <- liftIO $ G.gegl_buffer_set_extent foreground $ fg
{ G.rectangleX = G.rectangleX fg + 1
, G.rectangleY = G.rectangleY fg + 1
}
put $ ad
{ userState = ud
{ elapsedTime = elapsedTime + sec
}
}
else
put $ ad
{ quitEvent = True
}
clean :: UserData -> IO ()
clean _ = return ()