mirror of
https://gitlab.com/sheaf/metabrush.git
synced 2024-11-05 14:53:37 +00:00
basic rendering, mousewheel scrolling
This commit is contained in:
sheaf
parent
8e051c0f14
commit
9fc7b8acb3
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@ -28,6 +28,8 @@ common common
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build-depends:
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base
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>= 4.13 && < 4.16
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, acts
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^>= 0.3.1.0
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default-language:
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Haskell2010
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@ -61,9 +63,7 @@ library
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, Math.Vector2D
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build-depends:
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acts
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^>= 0.3.1.0
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, generic-data
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generic-data
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>= 0.8.0.0 && < 0.8.4.0
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, groups
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^>= 0.4.1.0
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@ -92,8 +92,8 @@ executable MetaBrush
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, MetaBrush.Asset.WindowIcons
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, MetaBrush.Document
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, MetaBrush.Event
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, MetaBrush.Render.Document
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, MetaBrush.Render.Util
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, MetaBrush.Stroke
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, MetaBrush.UI.Menu
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, Paths_MetaBrush
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@ -105,8 +105,12 @@ executable MetaBrush
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build-depends:
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MetaBrush
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, containers
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>= 0.6.0.1 && < 0.6.4
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, directory
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>= 1.3.4.0 && < 1.4
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--, fingertree
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-- >= 0.1.4.2 && < 0.2
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, generic-lens
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>= 1.2.0.1 && < 2.0
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, gi-gdk
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@ -123,5 +127,7 @@ executable MetaBrush
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^>= 0.0.1
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, haskell-gi-base
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^>= 0.24
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, stm
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^>= 2.5.0.0
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, text
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^>= 1.2.3.1 && < 1.2.5
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277
app/Main.hs
277
app/Main.hs
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@ -2,8 +2,10 @@
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{-# LANGUAGE ConstraintKinds #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE NegativeLiterals #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PatternSynonyms #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE TypeApplications #-}
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@ -13,14 +15,28 @@ module Main
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-- base
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import Control.Monad
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( void )
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( void, unless )
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import Data.Foldable
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( for_ )
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import Data.Int
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( Int32 )
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import Data.Word
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( Word32 )
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import System.Exit
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( exitSuccess )
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-- acts
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import Data.Act
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( Act
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( (•) )
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)
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-- containers
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import Data.IntMap.Strict
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( IntMap )
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import qualified Data.IntMap.Strict as IntMap
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( fromList, lookup, insert, traverseWithKey )
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-- directory
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import qualified System.Directory as Directory
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( canonicalizePath )
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@ -38,11 +54,21 @@ import qualified GI.Gdk as GDK
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-- gi-gtk
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import qualified GI.Gtk as GTK
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-- stm
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import qualified Control.Concurrent.STM as STM
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( atomically )
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import qualified Control.Concurrent.STM.TVar as STM
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( newTVarIO, writeTVar, readTVarIO )
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-- text
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import qualified Data.Text as Text
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( pack )
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-- MetaBrush
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import Math.Module
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( (*^) )
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import Math.Vector2D
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( Point2D(..), Vector2D(..) )
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import MetaBrush.Asset.Colours
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( getColours )
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import MetaBrush.Asset.Cursor
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@ -55,8 +81,18 @@ import MetaBrush.Asset.Tools
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( drawBrush, drawMeta, drawPath, drawPen )
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import MetaBrush.Asset.WindowIcons
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( drawMinimise, drawRestoreDown, drawMaximise, drawClose )
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import MetaBrush.Document
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( Document(..)
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, AABB(..)
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, Stroke(..)
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)
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import MetaBrush.Event
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( handleKeyboardPressEvent, handleKeyboardReleaseEvent )
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( handleKeyboardPressEvent, handleKeyboardReleaseEvent
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, pattern Control_L, pattern Control_R
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, pattern Shift_L, pattern Shift_R
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)
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import MetaBrush.Render.Document
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( renderDocument )
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import MetaBrush.Render.Util
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( widgetAddClass, widgetAddClasses )
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import MetaBrush.UI.Menu
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@ -66,9 +102,41 @@ import qualified Paths_MetaBrush as Cabal
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--------------------------------------------------------------------------------
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testDocuments :: IntMap Document
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testDocuments = IntMap.fromList
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$ zip [0..]
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[ Document
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{ displayName = "Document 1"
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, filePath = Nothing
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, unsavedChanges = False
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, strokes = [ Stroke [ Point2D 10 10, Point2D 30 30, Point2D 40 70 ] ]
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, bounds = AABB ( Point2D 0 0 ) ( Point2D 100 100 )
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, viewportCenter = Point2D 50 50
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, zoomFactor = 1
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}
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, Document
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{ displayName = "Document 2"
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, filePath = Nothing
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, unsavedChanges = True
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, strokes = [ Stroke [ Point2D 0 0, Point2D 10 10, Point2D 20 20 ] ]
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, bounds = AABB ( Point2D 0 0 ) ( Point2D 50 50 )
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, viewportCenter = Point2D 10 10
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, zoomFactor = 0.25
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}
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]
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--------------------------------------------------------------------------------
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main :: IO ()
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main = do
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---------------------------------------------------------
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-- Initialise state
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activeDocumentTVar <- STM.newTVarIO @( Maybe Int ) Nothing
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openDocumentsTVar <- STM.newTVarIO @( IntMap Document ) testDocuments
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pressedKeysTVar <- STM.newTVarIO @[ Word32 ] []
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---------------------------------------------------------
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-- Initialise GTK
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@ -84,7 +152,7 @@ main = do
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windowWidgetPath <- GTK.widgetGetPath window
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widgetAddClass window "window"
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GTK.setWindowResizable window True
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GTK.setWindowDecorated window True
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GTK.setWindowDecorated window False
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GTK.setWindowTitle window "MetaBrush"
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GTK.windowSetDefaultSize window 800 600
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@ -219,7 +287,6 @@ main = do
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$ Cairo.renderWithContext
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( drawClose colours )
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for_ [ minimiseButton, fullscreenButton, closeButton ] \ button -> do
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widgetAddClass button "windowIcon"
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@ -293,61 +360,7 @@ main = do
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$ Cairo.renderWithContext
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( drawMeta colours )
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---------------------------------------------------------
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-- File bar
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widgetAddClass fileBar "fileBar"
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fileTabs <- GTK.boxNew GTK.OrientationHorizontal 0
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GTK.containerAdd fileBar fileTabs
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widgetAddClasses fileTabs [ "fileBar", "plain", "text" ]
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fileBarPhantomRadioButton <- GTK.radioButtonNew ( [] @GTK.RadioButton )
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for_ [ 1 .. 12 ] \ i -> do
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-- File tab elements.
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pgButton <- GTK.radioButtonNewWithLabelFromWidget ( Just fileBarPhantomRadioButton ) ( "New Document (" <> Text.pack ( show i ) <> ")" )
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GTK.toggleButtonSetMode pgButton False -- don't display radio indicator
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closeFileButton <- GTK.buttonNewWithLabel "x"
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-- Create box for file tab elements.
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tab <- GTK.boxNew GTK.OrientationHorizontal 0
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widgetAddClasses tab [ "fileBarTab" ]
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GTK.boxPackStart fileTabs tab False False 0
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GTK.boxPackStart tab pgButton True True 0
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GTK.boxPackStart tab closeFileButton False False 0
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widgetAddClasses pgButton [ "fileBarTabButton" ]
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widgetAddClasses closeFileButton [ "fileBarCloseButton" ]
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-- Make both file tab elements activate styling on the whole tab
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-- (e.g. hovering over the close file button should highlight the whole tab).
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void $ GTK.onButtonClicked pgButton do
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isActive <- GTK.toggleButtonGetActive pgButton
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flags <- GTK.widgetGetStateFlags tab
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if isActive
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then GTK.widgetSetStateFlags tab ( GTK.StateFlagsActive : flags ) True
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else GTK.widgetSetStateFlags tab ( filter ( /= GTK.StateFlagsActive ) flags ) True
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{-
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void $ GTK.onButtonClicked closeFileButton do
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closeFileDialog ...
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-}
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for_ @_ @_ @_ @() [ Exists @GTK.IsWidget pgButton, Exists @GTK.IsWidget closeFileButton ] \ ( Exists button ) -> do
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void $ GTK.onWidgetEnterNotifyEvent button \ _ -> do
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flags <- GTK.widgetGetStateFlags tab
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GTK.widgetSetStateFlags tab ( GTK.StateFlagsPrelight : flags ) True
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pure False
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void $ GTK.onWidgetLeaveNotifyEvent button \ _ -> do
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flags <- GTK.widgetGetStateFlags tab
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GTK.widgetSetStateFlags tab ( filter ( /= GTK.StateFlagsPrelight ) flags ) True
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pure False
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GTK.scrolledWindowSetPolicy fileBar GTK.PolicyTypeAutomatic GTK.PolicyTypeNever
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GTK.scrolledWindowSetOverlayScrolling fileBar True
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---------------------------------------------------------
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---------------------------------------------------------
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-- Main viewport
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widgetAddClass viewportGrid "viewport"
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@ -362,6 +375,9 @@ main = do
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GTK.gridAttach viewportGrid rvTopRuler 1 0 1 1
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GTK.gridAttach viewportGrid viewportOverlay 1 1 1 1
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----------
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-- Rulers
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rulerCorner <- GTK.boxNew GTK.OrientationVertical 0
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leftRuler <- GTK.boxNew GTK.OrientationVertical 0
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topRuler <- GTK.boxNew GTK.OrientationHorizontal 0
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@ -403,8 +419,12 @@ main = do
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viewportArea <- GTK.drawingAreaNew
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GTK.setContainerChild viewportOverlay viewportArea
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-----------------
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-- Viewport scrolling
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viewportScrollbarGrid <- GTK.gridNew
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GTK.overlayAddOverlay viewportOverlay viewportScrollbarGrid
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GTK.overlaySetOverlayPassThrough viewportOverlay viewportScrollbarGrid True
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viewportHScrollbar <- GTK.scrollbarNew GTK.OrientationHorizontal ( Nothing @GTK.Adjustment )
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viewportVScrollbar <- GTK.scrollbarNew GTK.OrientationVertical ( Nothing @GTK.Adjustment )
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@ -417,6 +437,129 @@ main = do
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widgetAddClass viewportHScrollbar "viewportScrollbar"
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widgetAddClass viewportVScrollbar "viewportScrollbar"
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void $ GTK.onWidgetScrollEvent viewportArea \ scrollEvent -> do
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dx <- GDK.getEventScrollDeltaX scrollEvent
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dy <- GDK.getEventScrollDeltaY scrollEvent
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--GDK.getEventScrollDirection scrollEvent
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--GDK.getEventScrollType scrollEvent
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--GDK.getEventScrollX scrollEvent
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--GDK.getEventScrollY scrollEvent
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unless ( dx == 0 && dy == 0 ) do
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mbActiveDoc <- STM.readTVarIO activeDocumentTVar
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for_ mbActiveDoc \ i -> do
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docs <- STM.readTVarIO openDocumentsTVar
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for_ ( IntMap.lookup i docs ) \ ( doc@(Document { viewportCenter, zoomFactor } ) ) -> do
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pressedKeys <- STM.readTVarIO pressedKeysTVar
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let
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newDoc :: Document
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newDoc
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-- Zooming using 'Control'.
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| any ( \ key -> key == Control_L || key == Control_R ) pressedKeys
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= let
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newZoomFactor :: Double
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newZoomFactor
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| dy > 0
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= max 0.0078125 ( zoomFactor / 2 )
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| otherwise
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= zoomFactor * 2
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in doc { zoomFactor = newZoomFactor }
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-- Vertical scrolling turned into horizontal scrolling using 'Shift'.
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| dx == 0 && any ( \ key -> key == Shift_L || key == Shift_R ) pressedKeys
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= let
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newCenter :: Point2D Double
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newCenter = ( ( 25 / zoomFactor ) *^ Vector2D ( Point2D dy 0 ) ) • viewportCenter
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in doc { viewportCenter = newCenter }
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-- Vertical scrolling.
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| otherwise
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= let
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newCenter :: Point2D Double
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newCenter = ( ( 25 / zoomFactor ) *^ Vector2D ( Point2D dx dy ) ) • viewportCenter
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in doc { viewportCenter = newCenter }
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docs' :: IntMap Document
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docs' = IntMap.insert i newDoc docs
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STM.atomically ( STM.writeTVar openDocumentsTVar docs' )
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GTK.widgetQueueDraw viewportArea
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pure True
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-----------------
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-- Rendering
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void $ GTK.onWidgetDraw viewportArea \ctx -> do
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-- Get the relevant document information
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mbActiveDoc <- STM.readTVarIO activeDocumentTVar
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for_ mbActiveDoc \ i -> do
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docs <- STM.readTVarIO openDocumentsTVar
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for_ ( IntMap.lookup i docs ) \ doc -> do
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( `Cairo.renderWithContext` ctx ) $ do
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viewportWidth <- GTK.widgetGetAllocatedWidth viewportArea
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viewportHeight <- GTK.widgetGetAllocatedHeight viewportArea
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renderDocument colours ( viewportWidth, viewportHeight ) doc
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pure True
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---------------------------------------------------------
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-- File bar
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widgetAddClass fileBar "fileBar"
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fileTabs <- GTK.boxNew GTK.OrientationHorizontal 0
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GTK.containerAdd fileBar fileTabs
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widgetAddClasses fileTabs [ "fileBar", "plain", "text" ]
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fileBarPhantomRadioButton <- GTK.radioButtonNew ( [] @GTK.RadioButton )
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-- TODO: currently using static list of documents.
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-- Need to dynamically update this widget as the user opens/closes documents.
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fileButtons <- ( `IntMap.traverseWithKey` testDocuments ) \ i ( Document { displayName, unsavedChanges } ) -> do
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-- File tab elements.
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pgButton <- GTK.radioButtonNewWithLabelFromWidget ( Just fileBarPhantomRadioButton ) displayName
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GTK.toggleButtonSetMode pgButton False -- don't display radio indicator
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closeFileButton <- GTK.buttonNewWithLabel "x"
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-- Create box for file tab elements.
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tab <- GTK.boxNew GTK.OrientationHorizontal 0
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widgetAddClasses tab [ "fileBarTab" ]
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GTK.boxPackStart fileTabs tab False False 0
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GTK.boxPackStart tab pgButton True True 0
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GTK.boxPackStart tab closeFileButton False False 0
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widgetAddClasses pgButton [ "fileBarTabButton" ]
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widgetAddClasses closeFileButton [ "fileBarCloseButton" ]
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-- Make both file tab elements activate styling on the whole tab
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-- (e.g. hovering over the close file button should highlight the whole tab).
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void $ GTK.onButtonClicked pgButton do
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isActive <- GTK.toggleButtonGetActive pgButton
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flags <- GTK.widgetGetStateFlags tab
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if isActive
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then do
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GTK.widgetSetStateFlags tab ( GTK.StateFlagsActive : flags ) True
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STM.atomically ( STM.writeTVar activeDocumentTVar ( Just i ) )
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GTK.widgetQueueDraw viewportArea
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else
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GTK.widgetSetStateFlags tab ( filter ( /= GTK.StateFlagsActive ) flags ) True
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{-
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void $ GTK.onButtonClicked closeFileButton do
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closeFileDialog ...
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-}
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||||
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for_ @_ @_ @_ @() [ Exists @GTK.IsWidget pgButton, Exists @GTK.IsWidget closeFileButton ] \ ( Exists button ) -> do
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void $ GTK.onWidgetEnterNotifyEvent button \ _ -> do
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flags <- GTK.widgetGetStateFlags tab
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GTK.widgetSetStateFlags tab ( GTK.StateFlagsPrelight : flags ) True
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||||
pure False
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||||
void $ GTK.onWidgetLeaveNotifyEvent button \ _ -> do
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flags <- GTK.widgetGetStateFlags tab
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GTK.widgetSetStateFlags tab ( filter ( /= GTK.StateFlagsPrelight ) flags ) True
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pure False
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||||
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||||
pure pgButton
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||||
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||||
GTK.scrolledWindowSetPolicy fileBar GTK.PolicyTypeAutomatic GTK.PolicyTypeNever
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||||
GTK.scrolledWindowSetOverlayScrolling fileBar True
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||||
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||||
---------------------------------------------------------
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||||
-- Panels
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||||
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||||
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|
@ -469,7 +612,6 @@ main = do
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GTK.boxPackStart brushesPanel brushesContent True True 0
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||||
GTK.boxPackStart transformPanel transformContent True True 0
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||||
|
||||
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||||
---------------------------------------------------------
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||||
-- Info bar
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||||
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||||
|
|
@ -554,7 +696,10 @@ main = do
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|||
---------------------------------------------------------
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||||
-- Actions
|
||||
|
||||
GTK.widgetAddEvents window [GDK.EventMaskKeyPressMask, GDK.EventMaskKeyReleaseMask]
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||||
GTK.widgetAddEvents window
|
||||
[ GDK.EventMaskKeyPressMask, GDK.EventMaskKeyReleaseMask ]
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||||
GTK.widgetAddEvents viewportArea
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[ GDK.EventMaskScrollMask, GDK.EventMaskSmoothScrollMask ]
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_ <- GTK.onButtonClicked closeButton GTK.mainQuit
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||||
_ <- GTK.onButtonClicked minimiseButton ( GTK.windowIconify window )
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||||
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|
@ -568,9 +713,9 @@ main = do
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then GTK.windowUnmaximize window
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else GTK.windowMaximize window
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_ <- GTK.onWidgetKeyPressEvent window handleKeyboardPressEvent
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_ <- GTK.onWidgetKeyReleaseEvent window handleKeyboardReleaseEvent
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_ <- GTK.onWidgetDestroy window GTK.mainQuit
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_ <- GTK.onWidgetKeyPressEvent window ( handleKeyboardPressEvent pressedKeysTVar )
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_ <- GTK.onWidgetKeyReleaseEvent window ( handleKeyboardReleaseEvent pressedKeysTVar )
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_ <- GTK.onWidgetDestroy window GTK.mainQuit
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||||
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---------------------------------------------------------
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||||
-- GTK main loop
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||||
|
|
@ -580,6 +725,8 @@ main = do
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|||
|
||||
exitSuccess
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||||
|
||||
---------------------------------------------------------
|
||||
-- Utils.
|
||||
|
||||
data Exists c where
|
||||
Exists :: c a => a -> Exists c
|
||||
Exists :: c a => a -> Exists c
|
||||
|
|
|
|||
|
|
@ -2,7 +2,6 @@ packages: .
|
|||
|
||||
constraints:
|
||||
acts -finitary
|
||||
, haskell-gi >= 0.24
|
||||
|
||||
-- fixes gi-cairo-render to work with haskell-gi >= 0.24
|
||||
source-repository-package
|
||||
|
|
|
|||
|
|
@ -1,14 +1,38 @@
|
|||
{-# LANGUAGE DerivingStrategies #-}
|
||||
{-# LANGUAGE MultiParamTypeClasses #-}
|
||||
|
||||
module MetaBrush.Document where
|
||||
|
||||
-- text
|
||||
import Data.Text
|
||||
( Text )
|
||||
|
||||
-- MetaBrush
|
||||
import Math.Vector2D
|
||||
( Point2D )
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
{-
|
||||
data AABB
|
||||
= AABB
|
||||
{ topLeft :: !( Point2D Double )
|
||||
, botRight :: !( Point2D Double )
|
||||
}
|
||||
deriving stock Show
|
||||
|
||||
data Document
|
||||
= Document
|
||||
{ displayName :: !Text
|
||||
, filePath :: !(Maybe FilePath)
|
||||
, filePath :: !( Maybe FilePath )
|
||||
, unsavedChanges :: !Bool
|
||||
, viewport :: !AABB
|
||||
, strokes :: !(Set Stroke)
|
||||
, strokes :: ![ Stroke ]
|
||||
, bounds :: !AABB
|
||||
, viewportCenter :: !( Point2D Double )
|
||||
, zoomFactor :: !Double
|
||||
}
|
||||
-}
|
||||
deriving stock Show
|
||||
|
||||
data Stroke
|
||||
= Stroke
|
||||
{ strokePoints :: ![ Point2D Double ] }
|
||||
deriving stock Show
|
||||
|
|
|
|||
|
|
@ -1,8 +1,11 @@
|
|||
module MetaBrush.Event
|
||||
( handleKeyboardPressEvent
|
||||
, handleKeyboardReleaseEvent
|
||||
)
|
||||
where
|
||||
{-# LANGUAGE BlockArguments #-}
|
||||
{-# LANGUAGE PatternSynonyms #-}
|
||||
|
||||
module MetaBrush.Event where
|
||||
|
||||
-- base
|
||||
import Data.Word
|
||||
( Word32 )
|
||||
|
||||
-- gi-gdk
|
||||
import qualified GI.Gdk as GDK
|
||||
|
|
@ -10,14 +13,67 @@ import qualified GI.Gdk as GDK
|
|||
-- gi-gtk
|
||||
import qualified GI.Gtk as GTK
|
||||
|
||||
-- stm
|
||||
import qualified Control.Concurrent.STM as STM
|
||||
( atomically )
|
||||
import qualified Control.Concurrent.STM.TVar as STM
|
||||
( TVar, readTVar, writeTVar )
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
handleKeyboardPressEvent, handleKeyboardReleaseEvent :: GDK.EventKey -> IO Bool
|
||||
handleKeyboardPressEvent evt = do
|
||||
handleKeyboardPressEvent, handleKeyboardReleaseEvent :: STM.TVar [ Word32 ] -> GDK.EventKey -> IO Bool
|
||||
handleKeyboardPressEvent pressedKeysTVar evt = do
|
||||
keyCode <- GDK.getEventKeyKeyval evt
|
||||
case keyCode of
|
||||
-- escape
|
||||
0xff1b -> GTK.mainQuit
|
||||
_ -> pure ()
|
||||
Escape -> GTK.mainQuit
|
||||
_ -> STM.atomically do
|
||||
pressedKeys <- STM.readTVar pressedKeysTVar
|
||||
STM.writeTVar pressedKeysTVar ( keyCode : pressedKeys )
|
||||
pure True
|
||||
handleKeyboardReleaseEvent _ = pure True
|
||||
handleKeyboardReleaseEvent pressedKeysTVar evt = do
|
||||
keyCode <- GDK.getEventKeyKeyval evt
|
||||
STM.atomically do
|
||||
pressedKeys <- STM.readTVar pressedKeysTVar
|
||||
STM.writeTVar pressedKeysTVar ( filter ( /= keyCode ) pressedKeys )
|
||||
pure True
|
||||
|
||||
pattern Escape :: Word32
|
||||
pattern Escape = 0xff1b
|
||||
pattern Delete :: Word32
|
||||
pattern Delete = 0xffff
|
||||
pattern BackSpace :: Word32
|
||||
pattern BackSpace = 0xff08
|
||||
pattern Tab :: Word32
|
||||
pattern Tab = 0xff09
|
||||
pattern Return :: Word32
|
||||
pattern Return = 0xff0d
|
||||
pattern Pause :: Word32
|
||||
pattern Pause = 0xff13
|
||||
pattern Left :: Word32
|
||||
pattern Left = 0xff51
|
||||
pattern Up :: Word32
|
||||
pattern Up = 0xff52
|
||||
pattern Right :: Word32
|
||||
pattern Right = 0xff53
|
||||
pattern Down :: Word32
|
||||
pattern Down = 0xff54
|
||||
pattern PageUp :: Word32
|
||||
pattern PageUp = 0xff55
|
||||
pattern Next :: Word32
|
||||
pattern Next = 0xff56
|
||||
pattern PageDown :: Word32
|
||||
pattern PageDown = 0xff56
|
||||
pattern End :: Word32
|
||||
pattern End = 0xff57
|
||||
pattern Shift_L :: Word32
|
||||
pattern Shift_L = 0xffe1
|
||||
pattern Shift_R :: Word32
|
||||
pattern Shift_R = 0xffe2
|
||||
pattern Control_L :: Word32
|
||||
pattern Control_L = 0xffe3
|
||||
pattern Control_R :: Word32
|
||||
pattern Control_R = 0xffe4
|
||||
pattern Alt_L :: Word32
|
||||
pattern Alt_L = 0xffe9
|
||||
pattern Alt_R :: Word32
|
||||
pattern Alt_R = 0xffea
|
||||
|
|
|
|||
125
src/app/MetaBrush/Render/Document.hs
Normal file
125
src/app/MetaBrush/Render/Document.hs
Normal file
|
|
@ -0,0 +1,125 @@
|
|||
{-# LANGUAGE NamedFieldPuns #-}
|
||||
{-# LANGUAGE NegativeLiterals #-}
|
||||
{-# LANGUAGE RecordWildCards #-}
|
||||
|
||||
module MetaBrush.Render.Document
|
||||
( renderDocument )
|
||||
where
|
||||
|
||||
-- base
|
||||
import Control.Monad
|
||||
( when )
|
||||
import Data.Int
|
||||
( Int32 )
|
||||
|
||||
-- gi-cairo-render
|
||||
import qualified GI.Cairo.Render as Cairo
|
||||
|
||||
-- MetaBrush
|
||||
import qualified Math.Bezier.Quadratic as Quadratic
|
||||
( Bezier(..) )
|
||||
import Math.Vector2D
|
||||
( Point2D(..) )
|
||||
import MetaBrush.Asset.Colours
|
||||
( Colours, ColourRecord(..) )
|
||||
import MetaBrush.Document
|
||||
( Document(..), Stroke(..) )
|
||||
import MetaBrush.Render.Util
|
||||
( withRGBA )
|
||||
|
||||
--------------------------------------------------------------------------------
|
||||
|
||||
renderDocument :: Colours -> ( Int32, Int32 ) -> Document -> Cairo.Render ()
|
||||
renderDocument cols ( viewportWidth, viewportHeight ) ( Document { viewportCenter = Point2D cx cy, .. } ) = do
|
||||
|
||||
Cairo.save
|
||||
Cairo.translate ( 0.5 * fromIntegral viewportWidth ) ( 0.5 * fromIntegral viewportHeight )
|
||||
Cairo.scale zoomFactor zoomFactor
|
||||
Cairo.translate ( -cx ) ( -cy )
|
||||
|
||||
let
|
||||
( renderPoints, renderPath ) = renderStrokes cols zoomFactor strokes
|
||||
renderPath
|
||||
renderPoints
|
||||
|
||||
Cairo.restore
|
||||
|
||||
pure ()
|
||||
|
||||
renderStrokes :: Colours -> Double -> [ Stroke ] -> ( Cairo.Render (), Cairo.Render () )
|
||||
renderStrokes _ _ [] = ( pure (), pure () )
|
||||
renderStrokes cols zoom ( s : ss ) = ( points1 *> points2, path1 *> path2 )
|
||||
where
|
||||
( points1, path1 ) = renderStroke cols zoom s
|
||||
( points2, path2 ) = renderStrokes cols zoom ss
|
||||
|
||||
renderStroke :: Colours -> Double -> Stroke -> ( Cairo.Render (), Cairo.Render () )
|
||||
renderStroke cols zoom ( Stroke strokePts ) = go True strokePts
|
||||
where
|
||||
go :: Bool -> [ Point2D Double ] -> ( Cairo.Render (), Cairo.Render () )
|
||||
go drawFirstPoint pts = case pts of
|
||||
[] -> ( pure (), pure () )
|
||||
[p0] -> ( when drawFirstPoint ( drawPoint cols zoom p0 ), pure () )
|
||||
[_,_] -> error "'renderStroke': unexpected pair of points"
|
||||
( p0 : p1 : p2 : ps ) ->
|
||||
let
|
||||
drawPoints, drawNextPoints, drawPath, drawNextPath :: Cairo.Render ()
|
||||
( drawNextPoints, drawNextPath ) = go False ( p2 : ps )
|
||||
drawPoints = do
|
||||
when drawFirstPoint ( drawPoint cols zoom p0 )
|
||||
drawControl cols zoom p1
|
||||
drawPoint cols zoom p2
|
||||
drawNextPoints
|
||||
drawPath = do
|
||||
drawQuadraticBezier cols zoom ( Quadratic.Bezier p0 p1 p2 )
|
||||
drawNextPath
|
||||
in ( drawPoints, drawPath )
|
||||
|
||||
|
||||
drawPoint, drawControl :: Colours -> Double -> Point2D Double -> Cairo.Render ()
|
||||
drawPoint ( Colours { pathPoint, pathPointOutline } ) zoom ( Point2D x y ) = do
|
||||
|
||||
let
|
||||
hsqrt3 :: Double
|
||||
hsqrt3 = sqrt 0.75
|
||||
|
||||
Cairo.save
|
||||
Cairo.translate x y
|
||||
Cairo.scale ( 4 / zoom ) ( 4 / zoom )
|
||||
|
||||
Cairo.moveTo 1 0
|
||||
Cairo.lineTo 0.5 hsqrt3
|
||||
Cairo.lineTo -0.5 hsqrt3
|
||||
Cairo.lineTo -1 0
|
||||
Cairo.lineTo -0.5 (-hsqrt3)
|
||||
Cairo.lineTo 0.5 (-hsqrt3)
|
||||
Cairo.closePath
|
||||
|
||||
Cairo.setLineWidth 1
|
||||
withRGBA pathPointOutline Cairo.setSourceRGBA
|
||||
Cairo.strokePreserve
|
||||
|
||||
withRGBA pathPoint Cairo.setSourceRGBA
|
||||
Cairo.fill
|
||||
|
||||
Cairo.restore
|
||||
|
||||
drawControl ( Colours { controlPoint, controlPointOutline } ) zoom ( Point2D x y ) = do
|
||||
|
||||
Cairo.save
|
||||
Cairo.translate x y
|
||||
Cairo.scale ( 4 / zoom ) ( 4 / zoom )
|
||||
|
||||
Cairo.arc 0 0 1 0 ( 2 * pi )
|
||||
|
||||
Cairo.setLineWidth 1
|
||||
withRGBA controlPointOutline Cairo.setSourceRGBA
|
||||
Cairo.strokePreserve
|
||||
|
||||
withRGBA controlPoint Cairo.setSourceRGBA
|
||||
Cairo.fill
|
||||
|
||||
Cairo.restore
|
||||
|
||||
drawQuadraticBezier :: Colours -> Double -> Quadratic.Bezier ( Point2D Double ) -> Cairo.Render ()
|
||||
drawQuadraticBezier _ _ _ = pure ()
|
||||
|
|
@ -14,6 +14,7 @@
|
|||
module Math.Bezier.Cubic
|
||||
( Bezier(..)
|
||||
, bezier, bezier'
|
||||
, subdivide
|
||||
)
|
||||
where
|
||||
|
||||
|
|
@ -49,10 +50,6 @@ data Bezier p
|
|||
}
|
||||
deriving stock ( Show, Generic, Functor, Foldable, Traversable )
|
||||
|
||||
instance Module r p => Module r ( Bezier p ) where
|
||||
( Bezier p0 p1 p2 p3 ) ^+^ ( Bezier q0 q1 q2 q3 ) = Bezier ( p0 ^+^ q0 ) ( p1 ^+^ q1 ) ( p2 ^+^ q2 ) ( p3 ^+^ q3 )
|
||||
r *^ bz = fmap ( r *^ ) bz
|
||||
|
||||
-- | Cubic Bézier curve.
|
||||
bezier :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> p
|
||||
bezier ( Bezier { .. } ) t =
|
||||
|
|
@ -67,3 +64,15 @@ bezier' ( Bezier { .. } ) t
|
|||
$ lerp @v t
|
||||
( lerp @v t ( p0 --> p1 ) ( p1 --> p2 ) )
|
||||
( lerp @v t ( p1 --> p2 ) ( p2 --> p3 ) )
|
||||
|
||||
-- | Subdivide a cubic Bézier curve into two parts.
|
||||
subdivide :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> ( Bezier p, Bezier p )
|
||||
subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 q2 pt, Bezier pt r1 r2 p3 )
|
||||
where
|
||||
pt, s, q1, q2, r1, r2 :: p
|
||||
q1 = lerp @v t p0 p1
|
||||
s = lerp @v t p1 p2
|
||||
r2 = lerp @v t p2 p3
|
||||
q2 = lerp @v t q1 s
|
||||
r1 = lerp @v t s r2
|
||||
pt = lerp @v t q2 r1
|
||||
|
|
|
|||
|
|
@ -14,6 +14,7 @@
|
|||
module Math.Bezier.Quadratic
|
||||
( Bezier(..)
|
||||
, bezier, bezier'
|
||||
, subdivide
|
||||
)
|
||||
where
|
||||
|
||||
|
|
@ -46,14 +47,19 @@ data Bezier p
|
|||
}
|
||||
deriving stock ( Show, Generic, Functor, Foldable, Traversable )
|
||||
|
||||
instance Module r p => Module r ( Bezier p ) where
|
||||
( Bezier p0 p1 p2 ) ^+^ ( Bezier q0 q1 q2 ) = Bezier ( p0 ^+^ q0 ) ( p1 ^+^ q1 ) ( p2 ^+^ q2 )
|
||||
r *^ bz = fmap ( r *^ ) bz
|
||||
|
||||
-- | Quadratic Bézier curve.
|
||||
bezier :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> p
|
||||
bezier ( Bezier { .. } ) t = lerp @v t ( lerp @v t p0 p1 ) ( lerp @v t p1 p2 )
|
||||
|
||||
-- | Derivative of quadratic Bézier curve.
|
||||
bezier' :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> v
|
||||
bezier' ( Bezier { .. } ) t = 2 *^ lerp @v t ( p0 --> p1 ) ( p1 --> p2 )
|
||||
bezier' ( Bezier { .. } ) t = 2 *^ lerp @v t ( p0 --> p1 ) ( p1 --> p2 )
|
||||
|
||||
-- | Subdivide a quadratic Bézier curve into two parts.
|
||||
subdivide :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> ( Bezier p, Bezier p )
|
||||
subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 pt, Bezier pt r1 p2 )
|
||||
where
|
||||
pt, q1, r1 :: p
|
||||
q1 = lerp @v t p0 p1
|
||||
r1 = lerp @v t p1 p2
|
||||
pt = lerp @v t q1 r1
|
||||
|
|
|
|||
Loading…
Reference in a new issue