sdl2-compositor (empty) → 1.0
raw patch · 7 files changed
+1095/−0 lines, 7 filesdep +basedep +lineardep +sdl2setup-changed
Dependencies added: base, linear, sdl2, transformers
Files
- LICENSE +674/−0
- SDL/Compositor.hs +338/−0
- SDL/Compositor/Blender.hs +15/−0
- SDL/Compositor/Drawer.hs +10/−0
- SDL/Compositor/Manipulator.hs +17/−0
- Setup.hs +2/−0
- sdl2-compositor.cabal +39/−0
+ LICENSE view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ SDL/Compositor.hs view
@@ -0,0 +1,338 @@+-- Declarative image composition based on sdl2+-- Copyright (C) 2015 Sebastian Jordan+--+--+-- This program is free software: you can redistribute it and/or modify+-- it under the terms of the GNU General Public License as published by+-- the Free Software Foundation, either version 3 of the License, or+-- (at your option) any later version.+--+-- This program is distributed in the hope that it will be useful,+-- but WITHOUT ANY WARRANTY; without even the implied warranty of+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the+-- GNU General Public License for more details.+--+-- You should have received a copy of the GNU General Public License+-- along with this program. If not, see <http://www.gnu.org/licenses/>.++module SDL.Compositor+ ( -- * Interface+ Compositor (..)+ , Blender (..)+ , Manipulator (..)+ , Drawer (..)+ -- * Implementation+ , CompositingNode+ , sizedCompositingLeaf+ , runRenderer+ )+where++import Control.Monad.Trans.State+import Data.Maybe+import Data.Word+import Foreign.C.Types+import Linear.Affine+import Linear.V2+import Linear.V3+import Linear.V4+import SDL (($=))+import qualified SDL as SDL++import SDL.Compositor.Blender+import SDL.Compositor.Drawer+import SDL.Compositor.Manipulator++data CompositingNode a = Sized (V2 Int) a+ | FilledRectangle (V2 Int) (V4 Word8)+ | Rectangle (V2 Int) (V4 Word8)+ | Line (V2 Int) (V4 Word8)+ | AlphaMod Double (CompositingNode a)+ | RedMod Double (CompositingNode a)+ | GreenMod Double (CompositingNode a)+ | BlueMod Double (CompositingNode a)+ | OverrideBlendMode SDL.BlendMode (CompositingNode a)+ | PreserveBlendMode SDL.BlendMode (CompositingNode a)+ | (CompositingNode a) `Under` (CompositingNode a)+ | Flipped (V2 Bool) (CompositingNode a)+ | Rotated Double (CompositingNode a)+ | Translated (V2 Int) (CompositingNode a)+ deriving (Show,Read,Eq)++-- | Create a Graphics object with the given size.+sizedCompositingLeaf :: V2 Int -> a -> CompositingNode a+sizedCompositingLeaf = Sized++instance Manipulator (CompositingNode a) where+ modulateAlphaM modulator node = AlphaMod (fromIntegral modulator) node+ modulateRedM modulator node = RedMod (fromIntegral modulator) node+ modulateGreenM modulator node = GreenMod (fromIntegral modulator) node+ modulateBlueM modulator node = BlueMod (fromIntegral modulator) node++instance Blender (CompositingNode a) where+ overrideBlendMode = OverrideBlendMode+ preserveBlendMode = PreserveBlendMode++instance Compositor (CompositingNode a) where+ node1 `overC` node2 = node2 `Under` node1+ rotateC = Rotated+ translateC = Translated+ flipC = Flipped++instance Drawer (CompositingNode a) where+ rectangleC = Rectangle+ filledRectangleC = FilledRectangle+ lineC = Line++class Compositor c where+ overC :: c -> c -> c+ rotateC :: Double -> c -> c+ translateC :: V2 Int -> c -> c+ flipC :: V2 Bool -> c -> c++type RenderEnv t a = StateT (RendState t) IO a+data RendState t = RendState { alphaMod :: Double+ , redMod :: Double+ , greenMod :: Double+ , blueMod :: Double+ , renderTarget :: t+ , translationVec :: V2 Double+ , rotationAngle :: Double+ , blendOverride :: Maybe SDL.BlendMode+ , blendMode :: Maybe SDL.BlendMode+ , flipping :: V2 Bool+ }++defaultState :: t -> RendState t+defaultState target =+ RendState { alphaMod = 255+ , redMod = 255+ , greenMod = 255+ , blueMod = 255+ , renderTarget = target+ , translationVec = 0+ , rotationAngle = 0+ , blendOverride = Nothing+ , blendMode = Nothing+ , flipping = V2 False False+ }++-- | Render a composed image.+runRenderer :: SDL.Renderer -> CompositingNode SDL.Texture -> IO ()+runRenderer target node =+ evalStateT (renderNode node) (defaultState target)++renderNode :: CompositingNode SDL.Texture -> RenderEnv SDL.Renderer ()+renderNode (AlphaMod m node) = withAlphaMod m (renderNode node)+renderNode (RedMod m node) = withRedMod m (renderNode node)+renderNode (GreenMod m node) = withGreenMod m (renderNode node)+renderNode (BlueMod m node) = withBlueMod m (renderNode node)+renderNode (Translated vec node) = do+ currentAngle <- rotationAngle <$> get+ let rotatedVec = (rotateV2 currentAngle (fromIntegral <$> vec))+ currentTranslation <- translationVec <$> get+ withTranslation (currentTranslation + rotatedVec) (renderNode node)+renderNode (node1 `Under` node2) = do+ renderNode node1+ renderNode node2+renderNode (OverrideBlendMode mode node) = do+ oldOverride <- blendOverride <$> get+ case oldOverride of+ Nothing -> do setBlendOverride (Just mode)+ renderNode node+ setBlendOverride (Nothing)+ Just _ -> return ()+ where setBlendOverride m = modify $ \st -> st {blendOverride = m}+renderNode (Flipped f node) = do+ oldFlipping <- flipping <$> get+ setFlip (combineFlip oldFlipping f)+ renderNode node+ setFlip oldFlipping+ where setFlip x = modify $ \st -> st {flipping = x}+ combineFlip f1 f2 = addFlips <$> f1 <*> f2+ addFlips False b = b+ addFlips b False = b+ addFlips True True = False+renderNode (Rotated ang node) = do+ currentAngle <- rotationAngle <$> get+ setAngle (currentAngle + ang)+ renderNode node+ setAngle currentAngle+ where setAngle a = modify $ \st -> st {rotationAngle = a}+renderNode (PreserveBlendMode mode node) = do+ currentMode <- blendMode <$> get+ setBlendMode (Just mode)+ renderNode node+ setBlendMode currentMode+ where setBlendMode m = modify $ \st -> st {blendMode = m}+renderNode (Sized dims tex) = do+ env <- get+ let renderer = renderTarget env+ midPoint = translationVec env+ ang = (negate.(/pi).(*180)) $+ rotationAngle env+ targetRect = fmap round $+ SDL.Rectangle+ (P (midPoint - (fromIntegral <$> dims) / 2))+ (fromIntegral <$> dims)+ setColorsAndBlend tex+ ( SDL.copyEx+ renderer tex Nothing (Just targetRect) (CDouble ang)+ Nothing (flipping env)+ )+renderNode (Rectangle dims colors) = do+ env <- get+ let rend = renderTarget env+ modulations = ($env) <$> (V4 redMod greenMod blueMod alphaMod)+ -- get old values+ oldColors <- SDL.get (SDL.rendererDrawColor rend)+ oldTarget <- SDL.get (SDL.rendererRenderTarget rend)+ -- set new values+ tex <- SDL.createTexture rend SDL.RGBA8888 SDL.TextureAccessTarget (fromIntegral <$> dims)+ SDL.rendererRenderTarget rend $= Just tex+ SDL.rendererDrawColor rend $= V4 0 0 0 0+ SDL.clear rend+ SDL.rendererDrawColor rend $= round <$> modulations * (fromIntegral <$> colors)+ SDL.drawRect rend (Just (SDL.Rectangle 0 (fromIntegral <$> dims)))+ SDL.present rend+ SDL.rendererRenderTarget rend $= oldTarget+ -- render created texture+ renderNode (Sized dims tex)+ -- retrieve old values+ SDL.rendererDrawColor rend $= oldColors+ SDL.destroyTexture tex+renderNode (Line dims colors) = do+ env <- get+ let rend = renderTarget env+ modulations = ($env) <$> (V4 redMod greenMod blueMod alphaMod)+ -- get old values+ oldColors <- SDL.get (SDL.rendererDrawColor rend)+ oldTarget <- SDL.get (SDL.rendererRenderTarget rend)+ -- set new values+ tex <- SDL.createTexture rend SDL.RGBA8888 SDL.TextureAccessTarget (fromIntegral <$> dims)+ SDL.rendererRenderTarget rend $= Just tex+ SDL.rendererDrawColor rend $= V4 0 0 0 0+ SDL.clear rend+ SDL.rendererDrawColor rend $= round <$> modulations * (fromIntegral <$> colors)+ SDL.drawLine rend 0 (P $ fromIntegral <$> dims)+ SDL.present rend+ SDL.rendererRenderTarget rend $= oldTarget+ -- render created texture+ renderNode (Sized dims tex)+ -- retrieve old values+ SDL.rendererDrawColor rend $= oldColors+ SDL.destroyTexture tex+renderNode (FilledRectangle dims colors) = do+ env <- get+ let rend = renderTarget env+ modulations = ($env) <$> (V4 redMod greenMod blueMod alphaMod)+ -- get old values+ oldColors <- SDL.get (SDL.rendererDrawColor rend)+ oldTarget <- SDL.get (SDL.rendererRenderTarget rend)+ -- set new values+ SDL.rendererDrawColor rend $= round <$> modulations * (fromIntegral <$> colors)+ tex <- SDL.createTexture rend SDL.RGBA8888 SDL.TextureAccessTarget (fromIntegral <$> dims)+ SDL.rendererRenderTarget rend $= Just tex+ SDL.clear rend+ SDL.fillRect rend (Just (SDL.Rectangle 0 (fromIntegral <$> dims)))+ SDL.present rend+ SDL.rendererRenderTarget rend $= oldTarget+ -- render created texture+ renderNode (Sized dims tex)+ -- retrieve old values+ SDL.rendererDrawColor rend $= oldColors+ SDL.destroyTexture tex++getCurrentBlendMode :: RenderEnv t SDL.BlendMode+getCurrentBlendMode =+ (\env -> fromMaybe SDL.BlendNone $+ case blendOverride env of+ Nothing -> blendMode env+ Just _ -> blendOverride env) <$> get+++setColorsAndBlend :: SDL.Texture -> RenderEnv t a -> RenderEnv t a+setColorsAndBlend tex action = do+ env <- get+ blend <- getCurrentBlendMode+ let safeToWord8 :: Int -> Word8+ safeToWord8 n | n > 255 = 255+ | n < 0 = 0+ | otherwise = fromIntegral n+ alpha = (safeToWord8 . round . alphaMod) env+ red = (safeToWord8 . round . redMod) env+ green = (safeToWord8 . round . greenMod) env+ blue = (safeToWord8 . round . blueMod ) env+ oldAlpha <- SDL.get (SDL.textureAlphaMod tex)+ oldRGB <- SDL.get (SDL.textureColorMod tex)+ oldBlend <- SDL.get (SDL.textureBlendMode tex)+ SDL.textureAlphaMod tex $= alpha+ SDL.textureColorMod tex $= V3 red green blue+ SDL.textureBlendMode tex $= blend+ result <- action+ SDL.textureAlphaMod tex $= oldAlpha+ SDL.textureColorMod tex $= oldRGB+ SDL.textureBlendMode tex $= oldBlend+-- liftIO $ print oldBlend+ return result++rotateV2 :: Double -> V2 Double -> V2 Double+rotateV2 ang (V2 x y) =+ V2 (x * cos ang - y * sin ang)+ (x * sin ang + y * cos ang)++withTranslation :: V2 Double -> RenderEnv t a -> RenderEnv t a+withTranslation vec action = do+ oldVec <- translationVec <$> get+ modify $ \st -> st {translationVec = vec}+ res <- action+ modify $ \st -> st {translationVec = oldVec}+ return res++withAlphaMod :: Double -> RenderEnv t a -> RenderEnv t a+withAlphaMod m action = do+ oldMod <- getAlphaMod+ setAlphaMod (oldMod * (m/255))+ res <- action+ setAlphaMod oldMod+ return res+ where getAlphaMod :: RenderEnv t Double+ getAlphaMod = alphaMod <$> get+ setAlphaMod :: Double -> RenderEnv t ()+ setAlphaMod x = modify $ \st -> st {alphaMod = x}++withRedMod :: Double -> RenderEnv t a -> RenderEnv t a+withRedMod m action = do+ oldMod <- getRedMod+ setRedMod (oldMod * (m/255))+ res <- action+ setRedMod oldMod+ return res+ where getRedMod :: RenderEnv t Double+ getRedMod = redMod <$> get+ setRedMod :: Double -> RenderEnv t ()+ setRedMod x = modify $ \st -> st {redMod = x}++withGreenMod :: Double -> RenderEnv t a -> RenderEnv t a+withGreenMod m action = do+ oldMod <- getGreenMod+ setGreenMod (oldMod * (m/255))+ res <- action+ setGreenMod oldMod+ return res+ where getGreenMod :: RenderEnv t Double+ getGreenMod = greenMod <$> get+ setGreenMod :: Double -> RenderEnv t ()+ setGreenMod x = modify $ \st -> st {greenMod = x}++withBlueMod :: Double -> RenderEnv t a -> RenderEnv t a+withBlueMod m action = do+ oldMod <- getBlueMod+ setBlueMod (oldMod * (m/255))+ res <- action+ setBlueMod oldMod+ return res+ where getBlueMod :: RenderEnv t Double+ getBlueMod = blueMod <$> get+ setBlueMod :: Double -> RenderEnv t ()+ setBlueMod x = modify $ \st -> st {blueMod = x}
+ SDL/Compositor/Blender.hs view
@@ -0,0 +1,15 @@+module SDL.Compositor.Blender where++import SDL++-- | This class modells a graphics object that supports switching of+-- `BlendMode`.+class Blender b where+ -- | This method overrides the the blend mode settings for an+ -- object. If the object contains children/multiple objects, their+ -- `BlendMode` property will also be overidden.+ overrideBlendMode :: BlendMode -> b -> b+ -- | This method sets the `BlendMode` of an object. If the object+ -- has children, their `BlendMode` property will be preserved.+ preserveBlendMode :: BlendMode -> b -> b+
+ SDL/Compositor/Drawer.hs view
@@ -0,0 +1,10 @@+module SDL.Compositor.Drawer where++import Data.Word+import Linear.V2+import Linear.V4++class Drawer d where+ rectangleC :: V2 Int -> V4 Word8 -> d+ lineC :: V2 Int -> V4 Word8 -> d+ filledRectangleC :: V2 Int -> V4 Word8 -> d
+ SDL/Compositor/Manipulator.hs view
@@ -0,0 +1,17 @@+module SDL.Compositor.Manipulator where++-- | This class models a graphics object that supports color+-- modulation.+class Manipulator m where+ -- | Modulate the alpha channel of picture. This behavior stacks+ -- multiplicatively.+ modulateAlphaM :: Int -> m -> m+ -- | Modulate the red channel of picture. This behavior stacks+ -- multiplicatively.+ modulateRedM :: Int -> m -> m+ -- | Modulate the green channel of picture. This behavior stacks+ -- multiplicatively.+ modulateGreenM :: Int -> m -> m+ -- | Modulate the blue channel of picture. This behavior stacks+ -- multiplicatively.+ modulateBlueM :: Int -> m -> m
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ sdl2-compositor.cabal view
@@ -0,0 +1,39 @@+-- Initial sdl2-compositor.cabal generated by cabal init. For further +-- documentation, see http://haskell.org/cabal/users-guide/++name: sdl2-compositor+version: 1.0+synopsis: image compositing with sdl2 - declarative style++description: This package provides tools for simple image composition+ through the means of the SDL library, version 2. You can+ combine, translate, rotate, blend, modulate colors and+ draw in a declarative way.++license: GPL-3+license-file: LICENSE+author: Sebastian Jordan+maintainer: sebastian.jordan.mail@googlemail.com+copyright: (c) 2015 Sebastian Jordan+category: Graphics+build-type: Simple+-- extra-source-files: +cabal-version: >=1.10++library+ exposed-modules: SDL.Compositor,+ SDL.Compositor.Manipulator,+ SDL.Compositor.Blender,+ SDL.Compositor.Drawer+ -- other-modules: + -- other-extensions: + build-depends: base >=4.8 && <4.9,+ sdl2 == 2.*,+ transformers,+ linear+ -- hs-source-dirs: + default-language: Haskell2010++source-repository head+ type: darcs+ location: http://hub.darcs.net/seppeljordan/sdl2-compositor