( 
	app/noodle : illustration program
	
	right-click - erase
	alt-click - drag canvas
	arrows - move zoom
	space - toogle zoom
	backspace - blank canvas
	1-8 - select brush size

	TODO
		- Pixel cleanup brush
)

%RTN   { JMP2r }
%RTN? { #00 EQU #02 JNZ STH2r JMP2 }
%ABS2 { DUP2 #000f SFT2 EQU #04 JNZ #ffff MUL2 }
%CLN2r { DUP2 STH2 }
%STEP8 { #0033 SFT2 }
%MOD8 { #0007 AND2  }
%SFL { #40 SFT SFT }
%++ { #0001 ADD2 } %-- { #0001 SUB2 }
%2/ { #0001 SFT2 }
%8/ { #0003 SFT2 } %8* { #0030 SFT2 }
%8+ { #0008 ADD2 }
%FILESIZE { ~canvas.w ~canvas.h MUL2 #0008 MUL2 }

( variables )

;cursor { x 2 y 2 x0 2 y0 2 dx 2 dy 2 }
;brush { tool 1 size 1 patt 1 drag 1 last 1 oper 2 }
;zoom { active 1 x 2 y 2 }
;toolpane { x1 2 y1 2 x2 2 y2 2 }
;pattpane { x1 2 y1 2 x2 2 y2 2 }
;sizepane { x1 2 y1 2 x2 2 y2 2 }
;viewpane { x1 2 y1 2 x2 2 y2 2 }
;canvas { x1 2 y1 2 x2 2 y2 2 w 2 h 2 }
;rect { x1 2 y1 2 x2 2 y2 2 }
;line { x1 2 y1 2 x2 2 y2 2 sx 2 sy 2 dx 2 dy 2 e1 2 e2 2 }
;origin { x1 2 y1 2 x2 2 y2 2 }
;color { byte 1 }
;pt0 { x 2 y 2 }
;pt1 { x 2 y 2 }
;pt2 { x 2 y 2 } ( paint-rect )
;px { x 1 y 1 }
;document { state 1 edit 1 }
;path { length 1 name 20 }
;timer { byte 1 }

( devices )

|0100 ;Console { pad 8 char 1 byte 1 short 2 string 2 }
|0110 ;Screen { width 2 height 2 pad 4 x 2 y 2 color 1 }
|0120 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
|0130 ;Controller { p1 1 }
|0140 ;Keys { key 1 }
|0150 ;Mouse { x 2 y 2 state 1 chord 1 }
|0160 ;File { pad 8 name 2 length 2 load 2 save 2 }
|01F0 ;System { pad 8 r 2 g 2 b 2 }
|0200 ,RESET JMP2
|0204 ,ERROR JMP2
|0208 ,FRAME JMP2

( program )

@RESET ( -- )
	
	( theme ) 
	#e0fd =System.r #30fd =System.g #30fd =System.b

	( default canvas )
	#002a =canvas.w #001a =canvas.h

	( default brush )
	#04 =brush.size #00 =brush.patt #00 =brush.tool

	( load file )
	,path.name ,load-file JSR2

	( setup panes )
	#0010 =toolpane.x1 #0010 =toolpane.y1 ~toolpane.x1 #0028 ADD2 =toolpane.x2 ~toolpane.y1 #0008 ADD2 =toolpane.y2
	#0040 =sizepane.x1 #0010 =sizepane.y1 ~sizepane.x1 #0040 ADD2 =sizepane.x2 ~sizepane.y1 #0008 ADD2 =sizepane.y2
	~Screen.width #0078 SUB2 =viewpane.x1 #0010 =viewpane.y1 ~viewpane.x1 #0020 ADD2 =viewpane.x2 ~viewpane.y1 #0008 ADD2 =viewpane.y2
	~Screen.width #0050 SUB2 =pattpane.x1 #0010 =pattpane.y1 ~pattpane.x1 #0040 ADD2 =pattpane.x2 ~pattpane.y1 #0008 ADD2 =pattpane.y2

	( ready. )
	,center JSR2
	,clear JSR2

BRK

@FRAME ( -- )

	~document.edit #01 EQU ,on-rename JNZ2

	,draw-cursor JSR2

	( release drag )
	~Mouse.state #00 EQU ~brush.drag #01 EQU #0101 NEQ2 ^$no-release JNZ
		~origin.x1 #0002 SUB2 ~origin.y1 #0002 SUB2 ~origin.x2 #0002 ADD2 ~origin.y2 #0002 ADD2 #00 ,fill-rect JSR2
		~canvas.x1 -- ~canvas.y1 -- ~canvas.x2 ~canvas.y2 #10 ,line-rect JSR2
		,draw-background JSR2
		,fit-canvas JSR2
		,draw-foreground JSR2
		#00 =brush.drag
	$no-release

	( operations on release line/rect )
	~Mouse.state ~brush.last EQU ,$no-touch-change JNZ2
	~Mouse.x CLN2r ~canvas.x1 GTS2 STH2r ~canvas.x2 LTS2 #0101 NEQ2 ,$no-touch-change JNZ2
	~Mouse.y CLN2r ~canvas.y1 GTS2 STH2r ~canvas.y2 LTS2 #0101 NEQ2 ,$no-touch-change JNZ2
		~Mouse.state #00 EQU ^$no-touch-ondown JNZ
			( on down )
			~Mouse.x =cursor.dx
			~Mouse.y =cursor.dy
		$no-touch-ondown
		~Mouse.state #00 NEQ ^$no-touch-onup JNZ
			( on up )
			~brush.tool #02 NEQ ^$no-touch-line JNZ
				~cursor.dx ~canvas.x1 SUB2 ~cursor.dy ~canvas.y1 SUB2 ~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 ,paint-line JSR2
				,$touch-end JMP2
			$no-touch-line
			~brush.tool #03 NEQ ^$no-touch-rect JNZ
				~cursor.dx ~canvas.x1 SUB2 ~cursor.dy ~canvas.y1 SUB2 ~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 ,paint-rect JSR2
				,$touch-end JMP2
			$no-touch-rect
		$no-touch-onup
	$no-touch-change

	~Mouse.state #00 EQU ,$no-touch JNZ2

		( drag )
		~Controller #02 NEQ ,$no-drag JNZ2
			~brush.drag #00 NEQ ^$no-drag-start JNZ
				~canvas.x1 =origin.x1
				~canvas.y1 =origin.y1
				~canvas.x2 =origin.x2
				~canvas.y2 =origin.y2
			$no-drag-start
			~canvas.x1 -- ~canvas.y1 -- ~canvas.x2 ~canvas.y2 #10 ,line-rect JSR2
			~canvas.x1 ~Mouse.x ~cursor.x0 SUB2 ADD2 =canvas.x1
			~canvas.y1 ~Mouse.y ~cursor.y0 SUB2 ADD2 =canvas.y1
			~canvas.w 8* ~canvas.x1 ADD2 =canvas.x2 
			~canvas.h 8* ~canvas.y1 ADD2 =canvas.y2 
			~canvas.x1 -- ~canvas.y1 -- ~canvas.x2 ~canvas.y2 #13 ,line-rect JSR2
			#01 =brush.drag
			,$touch-end JMP2
		$no-drag

		( in sizepane )
		~Mouse.x CLN2r ~sizepane.x1 GTH2 STH2r ~sizepane.x2 LTH2 #0101 NEQ2 ^$no-touch-sizepane JNZ
		~Mouse.y CLN2r ~sizepane.y1 GTH2 STH2r ~sizepane.y2 LTH2 #0101 NEQ2 ^$no-touch-sizepane JNZ
			( release ) #00 =Mouse.state
			#01 =brush.tool
			~Mouse.x ~sizepane.x1 SUB2 8/ SWP POP =brush.size
			( draw ) ,draw-sizepane JSR2
			( draw ) ,draw-toolpane JSR2
			,$touch-end JMP2
		$no-touch-sizepane

		( in pattpane )
		~Mouse.x CLN2r ~pattpane.x1 GTH2 STH2r ~pattpane.x2 LTH2 #0101 NEQ2 ^$no-touch-pattpane JNZ
		~Mouse.y CLN2r ~pattpane.y1 GTH2 STH2r ~pattpane.y2 LTH2 #0101 NEQ2 ^$no-touch-pattpane JNZ
			( release ) #00 =Mouse.state
			~Mouse.x ~pattpane.x1 SUB2 8/ SWP POP =brush.patt
			( draw ) ,draw-pattpane JSR2
			,$touch-end JMP2
		$no-touch-pattpane

		( in toolpane )
		~Mouse.x CLN2r ~toolpane.x1 GTH2 STH2r ~toolpane.x2 LTH2 #0101 NEQ2 ^$no-touch-toolpane JNZ
		~Mouse.y CLN2r ~toolpane.y1 GTH2 STH2r ~toolpane.y2 LTH2 #0101 NEQ2 ^$no-touch-toolpane JNZ
			( release ) #00 =Mouse.state
			~Mouse.x ~toolpane.x1 SUB2 8/ SWP POP =brush.tool
			( draw ) ,draw-toolpane JSR2
			,$touch-end JMP2
		$no-touch-toolpane

		( in viewpane )
		~Mouse.x CLN2r ~viewpane.x1 GTH2 STH2r ~viewpane.x2 LTH2 #0101 NEQ2 ,$no-touch-viewpane JNZ2
		~Mouse.y CLN2r ~viewpane.y1 GTH2 STH2r ~viewpane.y2 LTH2 #0101 NEQ2 ,$no-touch-viewpane JNZ2
			( release ) #00 =Mouse.state
			( clear ) ~canvas.x1 #0002 SUB2 ~canvas.y1 #0002 SUB2 ~canvas.x2 #0002 ADD2 ~canvas.y2 #0002 ADD2 #00 ,fill-rect JSR2
			,draw-background JSR2
			~Mouse.x ~viewpane.x1 SUB2 8/ SWP POP
			DUP #00 NEQ ^$no-incwidth JNZ
				~canvas.w ++ =canvas.w
			$no-incwidth
			DUP #01 NEQ ^$no-decwidth JNZ
				~canvas.w -- =canvas.w
			$no-decwidth
			DUP #02 NEQ ^$no-incheight JNZ
				~canvas.h ++ =canvas.h
			$no-incheight
			DUP #03 NEQ ^$no-decheight JNZ
				~canvas.h -- =canvas.h
			$no-decheight
			POP
			,fit-canvas JSR2
			,redraw JSR2
			,$touch-end JMP2
		$no-touch-viewpane

		( in canvas )
		~Mouse.x CLN2r ~canvas.x1 GTS2 STH2r ~canvas.x2 LTS2 #0101 NEQ2 ,$no-touch-canvas JNZ2
		~Mouse.y CLN2r ~canvas.y1 GTS2 STH2r ~canvas.y2 LTS2 #0101 NEQ2 ,$no-touch-canvas JNZ2

			( set cursor operation )
			,add-pixel ~Mouse.state #01 EQU ,$no-oper JNZ2 POP2 ,remove-pixel $no-oper =brush.oper

			~brush.tool #00 NEQ ^$no-touch-pen JNZ
				~cursor.x0 ~canvas.x1 SUB2 ~cursor.y0 ~canvas.y1 SUB2 ~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 ,paint-line JSR2
				,$touch-end JMP2
			$no-touch-pen

			~brush.tool #01 NEQ ^$no-touch-brush JNZ
				~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 ,paint-brush JSR2
				,$touch-end JMP2
			$no-touch-brush

			~brush.tool #04 NEQ ^$no-touch-zoom JNZ
				~zoom.active #00 EQU =zoom.active
				( release ) #00 =Mouse.state
				~Mouse.x ~canvas.x1 SUB2 ~canvas.w 2/ SUB2 =zoom.x
				~Mouse.y ~canvas.y1 SUB2 ~canvas.h 2/ SUB2 =zoom.y
				,redraw JSR2
				,$touch-end JMP2
			$no-touch-zoom

		$no-touch-canvas

		( background interface )
		~Mouse.y STEP8 ~Screen.height #0010 SUB2 NEQ2 ^$no-touch-background JNZ
			~Mouse.x ~Screen.width #0020 SUB2 SUB2 8/ 
			DUP2 #0000 NEQ2 ^$no-clear-button JNZ
				,clear JSR2
				#01 =document.edit
				( release ) #00 =Mouse.state
			$no-clear-button
			DUP2 #0001 NEQ2 ^$no-load-button JNZ
				,path.name ,load-file JSR2
				,draw-canvas JSR2
				( release ) #00 =Mouse.state
			$no-load-button
			DUP2 #0002 NEQ2 ^$no-save-button JNZ
				,path.name ,save-file JSR2
				( release ) #00 =Mouse.state
			$no-save-button
			POP2
		$no-touch-background

		( jump label )
		$touch-end

	$no-touch

	~Controller.p1 #00 EQU ,$no-ctrl JNZ2
		~Controller.p1 #f0 AND
			DUP #04 SFT #01 AND #01 NEQ ^$no-up JNZ
				( move ) ~zoom.y -- =zoom.y $no-up
			DUP #05 SFT #01 AND #01 NEQ ^$no-down JNZ
				( move ) ~zoom.y ++ =zoom.y $no-down
			DUP #06 SFT #01 AND #01 NEQ ^$no-left JNZ
				( move ) ~zoom.x -- =zoom.x $no-left
			DUP #07 SFT #01 AND #01 NEQ ^$no-right JNZ
				( move ) ~zoom.x ++ =zoom.x $no-right
		#00 EQU #04 JNZ ,draw-canvas JSR2
	$no-ctrl
	
	~Keys #00 EQU ,$no-keys JNZ2
		~Keys 
		DUP #20 NEQ ^$no-space JNZ
			( toggle zoom ) ~zoom.active #00 EQU =zoom.active ,redraw JSR2 $no-space 
		DUP #08 NEQ ^$no-backspace JNZ
			( erase ) ,clear JSR2 $no-backspace
		DUP #71 NEQ ^$no-qkey JNZ
			( tool0 ) #00 =brush.tool ,draw-toolpane JSR2 $no-qkey
		DUP #77 NEQ ^$no-wkey JNZ
			( tool0 ) #01 =brush.tool ,draw-toolpane JSR2 $no-wkey
		DUP #65 NEQ ^$no-ekey JNZ
			( tool0 ) #02 =brush.tool ,draw-toolpane JSR2 $no-ekey
		DUP #72 NEQ ^$no-rkey JNZ
			( tool0 ) #03 =brush.tool ,draw-toolpane JSR2 $no-rkey
		DUP #74 NEQ ^$no-tkey JNZ
			( tool0 ) #04 =brush.tool ,draw-toolpane JSR2 $no-tkey
		DUP 
			DUP #30 GTH SWP #39 LTH #0101 NEQ2 ^$no-numkey JNZ
			( size ) ~Keys #31 SUB =brush.size ,draw-sizepane JSR2 $no-numkey
		POP
		( release ) #00 =Keys
	$no-keys

	~Mouse.x =cursor.x0
	~Mouse.y =cursor.y0
	~Mouse.state =brush.last

BRK

@on-rename ( -- )

	~Keys #00 EQU ,$no-keys JNZ2
		( enter )
		~Keys #0d NEQ ^$no-enter JNZ
			#00 =document.edit
			,redraw JSR2 BRK
			$no-enter
		( backspace )
		~Keys #08 NEQ ^$no-backspace JNZ
			~path.length #00 EQU ^$end JNZ
			~path.length #01 SUB =path.length
			^$end JMP
			$no-backspace
		( default )
		~path.length #1f EQU ^$end JNZ
			~Keys ,path.name #00 ~path.length ADD2 POK2
			~path.length #01 ADD =path.length
			$end
		#00 ,path.name #00 ~path.length ADD2 POK2
		#00 =Keys.key
	$no-keys
	( draw )
	#0008 =Sprite.x ~Screen.height #0010 SUB2 =Sprite.y
	,path.name #01 ~timer #04 DIV #03 AND #03 MUL ADD ,draw-label JSR2
	$clear
		#00 =Sprite.color
		~Sprite.x 8+ DUP2 =Sprite.x
		~Screen.width LTH2 ^$clear JNZ
	( blink timer )
	~timer #01 ADD =timer

BRK

@center ( -- )
	
	( clear old ) 
	~canvas.x1 #0002 SUB2 ~canvas.y1 #0002 SUB2 ~canvas.x2 #0002 ADD2 ~canvas.y2 #0002 ADD2 #00 ,fill-rect JSR2

	,draw-background JSR2

	~Screen.width #0002 DIV2 ~canvas.w 8* 2/ SUB2 =canvas.x1 
	~Screen.height #0002 DIV2 ~canvas.h 8* 2/ SUB2 =canvas.y1

	,fit-canvas JSR2

	,draw-foreground JSR2

RTN

@clear ( -- )
	
	( new label )
	,untitled_txt ,path.name ,strcpy JSR2
	#00 =path.length
	( erase data )
	,data FILESIZE ,data ADD2
	$loop
		( write ) OVR2 #00 ROT ROT POK2
		( incr ) SWP2 #0001 ADD2 SWP2
		OVR2 OVR2 LTH2 ^$loop JNZ
	POP2 POP2
	,redraw JSR2

RTN

@load-file ( path -- )

	=File.name FILESIZE =File.length ,data =File.load

RTN

@save-file ( path -- )

	=File.name FILESIZE =File.length ,data =File.save

RTN

@fit-canvas
	
	~canvas.w 8* ~canvas.x1 ADD2 =canvas.x2 
	~canvas.h 8* ~canvas.y1 ADD2 =canvas.y2 
	~canvas.x1 -- ~canvas.y1 -- ~canvas.x2 ~canvas.y2 #01 ,line-rect JSR2
	,draw-canvas JSR2

RTN

@paint-line ( x1 y1 x2 y2 -- )
	
	( load ) =line.y1 =line.x1 =line.y2 =line.x2

	( trim if zoomed )
	~zoom.active #01 NEQ ^$no-zoom JNZ
		~line.x1 8/ ~zoom.x ADD2 =line.x1
		~line.y1 8/ ~zoom.y ADD2 =line.y1
		~line.x2 8/ ~zoom.x ADD2 =line.x2
		~line.y2 8/ ~zoom.y ADD2 =line.y2
	$no-zoom

	~line.x1 ~line.x2 SUB2 ABS2 =line.dx
	~line.y1 ~line.y2 SUB2 ABS2 #0000 SWP2 SUB2 =line.dy
	#ffff #00 ~line.x2 ~line.x1 LTS2 #0002 MUL2 ADD2 =line.sx 
	#ffff #00 ~line.y2 ~line.y1 LTS2 #0002 MUL2 ADD2 =line.sy 
	~line.dx ~line.dy ADD2 =line.e1
	$loop
		( paint ) ~line.x2 ~line.y2 ~brush.oper JSR2
		~line.x2 ~line.x1 EQU2 ~line.y2 ~line.y1 EQU2 #0101 EQU2 ^$end JNZ
		~line.e1 #0002 MUL2 =line.e2
		~line.e2 ~line.dy LTS2 ^$skipy JNZ
			~line.e1 ~line.dy ADD2 =line.e1
			~line.x2 ~line.sx ADD2 =line.x2
		$skipy
		~line.e2 ~line.dx GTS2 ^$skipx JNZ
			~line.e1 ~line.dx ADD2 =line.e1
			~line.y2 ~line.sy ADD2 =line.y2
		$skipx
		,$loop JMP2
	$end

	,draw-canvas JSR2
	,draw-foreground JSR2

RTN

@paint-rect ( x1 y1 x2 y2 -- )

	( load ) =rect.y2 =rect.x2 =rect.y1 =rect.x1

	( trim if zoomed )
	~zoom.active #01 NEQ ^$no-zoom JNZ
		~rect.x1 8/ ~zoom.x ADD2 =rect.x1
		~rect.y1 8/ ~zoom.y ADD2 =rect.y1
		~rect.x2 8/ ~zoom.x ADD2 #0001 ADD2 =rect.x2
		~rect.y2 8/ ~zoom.y ADD2 #0001 ADD2 =rect.y2
	$no-zoom

	~rect.x1 =pt2.x
	~rect.y1 =pt2.y

	$ver
		~rect.x1 =pt2.x
		$hor
			~pt2.x SWP POP =px.x ~pt2.y SWP POP =px.y
			,patternize JSR2 #00 EQU ^$no-pixel JNZ
				( draw ) ~pt2.x ~pt2.y ~brush.oper JSR2 $no-pixel
			( incr ) ~pt2.x ++ =pt2.x
			~pt2.x ~rect.x2 LTS2 ^$hor JNZ
		~pt2.y ++ =pt2.y
		~pt2.y ~rect.y2 LTS2 ^$ver JNZ

	,draw-canvas JSR2
	,draw-foreground JSR2
	
RTN

@paint-brush ( x y -- )

	#0003 SUB2 =pt0.y #0003 SUB2 =pt0.x ( cursor offset )

	( trim if zoomed )
	~zoom.active #01 NEQ ^$no-zoom JNZ
		~pt0.x 8/ ~zoom.x ADD2 #0003 SUB2 =pt0.x
		~pt0.y 8/ ~zoom.y ADD2 #0003 SUB2 =pt0.y
	$no-zoom

	#00 =px.x #00 =px.y 
	$ver
		#00 =px.x
		$hor
			( addr ) ,size_icns #00 ~brush.size 8* ADD2
			( byte ) #00 ~px.y ADD2 PEK2 #07 ~px.x SUB SFT #01 AND 
			#00 EQU ^$no-pixel JNZ
			,patternize JSR2 #00 EQU ^$no-pixel JNZ
				~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 ~brush.oper JSR2 $no-pixel
			( incr ) ~px.x #01 ADD =px.x
			~px.x #08 LTH ^$hor JNZ
		( incr ) ~px.y #01 ADD =px.y
		~px.y #08 LTH ^$ver JNZ

	,draw-canvas JSR2
	,draw-foreground JSR2

RTN

@patternize ( -- )

	~brush.patt #00 NEQ ^$noplain JNZ
		#01 RTN
	$noplain

	~brush.patt #01 NEQ ^$notone1 JNZ
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 ADD2 #0001 AND2 #0000 EQU2 
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 SUB2 #0001 AND2 #0000 EQU2 
		#0101 EQU2
		RTN
	$notone1

	~brush.patt #02 NEQ ^$notone2 JNZ
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 ADD2 #0003 AND2 #0000 EQU2 
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 SUB2 #0003 AND2 #0000 EQU2 
		#0101 EQU2
		RTN
	$notone2

	~brush.patt #03 NEQ ^$notone3 JNZ
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 ADD2 #0005 AND2 #0000 EQU2 
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 SUB2 #0005 AND2 #0000 EQU2 
		#0101 EQU2
		RTN
	$notone3

	~brush.patt #04 NEQ ^$notone4 JNZ
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 ADD2 #0003 AND2 #0000 EQU2 RTN
	$notone4

	~brush.patt #05 NEQ ^$notone5 JNZ
		~pt0.x #00 ~px.x ADD2 ~pt0.y #00 ~px.y ADD2 SUB2 #0003 AND2 #0000 EQU2 RTN
	$notone5

	~brush.patt #06 NEQ ^$notone6 JNZ
		~pt0.x #00 ~px.x ADD2 #0001 AND2 SWP POP RTN
	$notone6

	~brush.patt #07 NEQ ^$notone7 JNZ
		~pt0.y #00 ~px.y ADD2 #0001 AND2 SWP POP RTN
	$notone7

	#00

RTN

@get-pixel ( x y -- b )

	SWP POP #07 AND =px.y
	SWP POP #07 AND =px.x
	( get tile ) ~pt1.x 8/ ~pt1.y 8/ ~canvas.w MUL2 ADD2 8*
	( add addr ) ,data ADD2
	#00 ~px.y ADD2 PEK2 #07 ~px.x SUB SFT #01 AND

RTN

@add-pixel ( x y -- )

	=pt1.y =pt1.x
	( get tile addr ) ,data ~pt1.x 8/ ~pt1.y 8/ ~canvas.w MUL2 ADD2 8* ~pt1.y MOD8 ADD2 ADD2 
	( load ) DUP2 PEK2
	( mask ) #01 #07 ~pt1.x MOD8 SWP POP SUB SFL ORA
	( save ) ROT ROT POK2

RTN

@remove-pixel ( x y -- )

	=pt1.y =pt1.x
	( get tile addr ) ,data ~pt1.x 8/ ~pt1.y 8/ ~canvas.w MUL2 ADD2 8* ~pt1.y MOD8 ADD2 ADD2 
	( load ) DUP2 PEK2
	( mask ) #01 #07 ~pt1.x MOD8 SWP POP SUB SFL #ff EOR AND
	( save ) ROT ROT POK2

RTN

( Drawing )

@redraw ( -- )
	
	,draw-background JSR2
	,draw-canvas JSR2
	,draw-foreground JSR2
		
RTN

@draw-canvas ( -- )
	
	~zoom.active #01 EQU ,draw-canvas-zoom JNZ2

	~canvas.y1 =Sprite.y
	,data =Sprite.addr
	$ver
		~canvas.x1 =Sprite.x 
		$hor
			( draw ) #09 =Sprite.color
			( incr ) ~Sprite.x 8+ =Sprite.x
			( incr ) ~Sprite.addr 8+ =Sprite.addr
		~Sprite.x ~canvas.x2 NEQ2 ^$hor JNZ
		( incr ) ~Sprite.y 8+ =Sprite.y
	~Sprite.y ~canvas.y2 NEQ2 ^$ver JNZ

RTN

@draw-canvas-zoom ( -- )
	
	~zoom.y =pt1.y
	~canvas.y1 =Sprite.y
	,data =Sprite.addr
	$ver
		~canvas.x1 =Sprite.x 
		~zoom.x =pt1.x
		$hor
			( incr ) ,bigpixel_icn #0008 #00 ~pt1.x ~pt1.y ,get-pixel JSR2 MUL2 ADD2 =Sprite.addr
			( draw ) #09 =Sprite.color
			( incr ) ~Sprite.x 8+ =Sprite.x
			( incr ) ~pt1.x ++ =pt1.x
		~Sprite.x ~canvas.x2 NEQ2 ^$hor JNZ
		( incr ) ~Sprite.y 8+ =Sprite.y
		( incr ) ~pt1.y ++ =pt1.y
	~Sprite.y ~canvas.y2 NEQ2 ^$ver JNZ

RTN

@draw-cursor ( -- )

	~cursor.x ~Mouse.x NEQ2
	~cursor.y ~Mouse.y NEQ2
	#0000 EQU2 
	~Mouse.state 
	#00 NEQ 
	#0101 EQU2 RTN? ( Return if unchanged )

	,blank_icn =Sprite.addr
	( clear brush size )
	~cursor.x #0003 SUB2 =Sprite.x ~cursor.y #0003 SUB2 =Sprite.y #10 =Sprite.color
	( clear last cursor )
	~cursor.x =Sprite.x ~cursor.y =Sprite.y #10 =Sprite.color
	( record cursor positions )
	~Mouse.x =cursor.x ~Mouse.y =cursor.y
	( draw size cursor )
	~brush.tool #01 NEQ ,$outside-canvas JNZ2
	( do not draw size when holding alt )
	~Controller #02 EQU ,$outside-canvas JNZ2
	~Mouse.x CLN2r ~canvas.x1 GTH2 STH2r ~canvas.x2 LTH2 #0101 NEQ2 ,$outside-canvas JNZ2
	~Mouse.y CLN2r ~canvas.y1 GTH2 STH2r ~canvas.y2 LTH2 #0101 NEQ2 ,$outside-canvas JNZ2	
	( do not draw size in toolpane )
	~Mouse.x CLN2r ~toolpane.x1 GTH2 STH2r ~toolpane.x2 LTH2 #0101 EQU2 ~Mouse.y CLN2r ~toolpane.y1 GTH2 STH2r ~toolpane.y2 LTH2 #0101 EQU2 #0101 EQU2 ,$outside-canvas JNZ2
	~Mouse.x CLN2r ~sizepane.x1 GTH2 STH2r ~sizepane.x2 LTH2 #0101 EQU2 ~Mouse.y CLN2r ~sizepane.y1 GTH2 STH2r ~sizepane.y2 LTH2 #0101 EQU2 #0101 EQU2 ,$outside-canvas JNZ2
	~Mouse.x CLN2r ~pattpane.x1 GTH2 STH2r ~pattpane.x2 LTH2 #0101 EQU2 ~Mouse.y CLN2r ~pattpane.y1 GTH2 STH2r ~pattpane.y2 LTH2 #0101 EQU2 #0101 EQU2 ,$outside-canvas JNZ2
		~cursor.x #0003 SUB2 =Sprite.x ~cursor.y #0003 SUB2 =Sprite.y
		,brush_icns #00 ~brush.size 8* ADD2 =Sprite.addr
		#11 ~Mouse.state #02 MUL ADD =Sprite.color
		~Mouse.state #00 EQU ^$outside-canvas JNZ RTN
	$outside-canvas
	( draw new cursor )
	~cursor.x =Sprite.x ~cursor.y =Sprite.y
	,pointers_icn #00 ~Controller #02 EQU 8* ADD2 =Sprite.addr
	#1f =Sprite.color

RTN

@draw-toolpane ( -- )
	
	( frame )	
	~toolpane.x1 -- ~toolpane.y1 -- ~toolpane.x2 ~toolpane.y2 #00 ,line-rect JSR2
	~toolpane.x1 #0002 SUB2 ~toolpane.y1 #0002 SUB2 ~toolpane.x2 ~toolpane.y2 #01 ,line-rect JSR2

	~toolpane.x1 =Sprite.x ~toolpane.y1 =Sprite.y ,tool_icns =Sprite.addr

	$loop
		( draw ) #01 ~Sprite.x ~toolpane.x1 SUB2 8/ SWP POP ~brush.tool EQU #02 MUL ADD =Sprite.color
		( incr ) ~Sprite.x 8+ =Sprite.x
		( incr ) ~Sprite.addr 8+ =Sprite.addr
		~Sprite.x ~toolpane.x2 LTH2 ^$loop JNZ

	~zoom.active #01 NEQ ^$no-zoom JNZ
		~Sprite.x #0008 SUB2 =Sprite.x
		,tool_icns #0028 ADD2 =Sprite.addr
		#01 #04 ~brush.tool EQU #02 MUL ADD =Sprite.color
		$no-zoom

RTN

@draw-pattpane ( -- )
	
	( frame )	
	~pattpane.x1 -- ~pattpane.y1 -- ~pattpane.x2 ~pattpane.y2 #00 ,line-rect JSR2
	~pattpane.x1 #0002 SUB2 ~pattpane.y1 #0002 SUB2 ~pattpane.x2 ~pattpane.y2 #01 ,line-rect JSR2

	~pattpane.x1 =Sprite.x ~pattpane.y1 =Sprite.y ,patt_icns =Sprite.addr

	$loop
		( draw ) #01 ~Sprite.x ~pattpane.x1 SUB2 8/ SWP POP ~brush.patt EQU #02 MUL ADD =Sprite.color
		( incr ) ~Sprite.x 8+ =Sprite.x
		( incr ) ~Sprite.addr 8+ =Sprite.addr
		~Sprite.x ~pattpane.x2 LTH2 ^$loop JNZ

RTN

@draw-sizepane ( -- )
	
	( frame )
	~sizepane.x1 -- ~sizepane.y1 -- ~sizepane.x2 ~sizepane.y2 #00 ,line-rect JSR2
	~sizepane.x1 #0002 SUB2 ~sizepane.y1 #0002 SUB2 ~sizepane.x2 ~sizepane.y2 #01 ,line-rect JSR2

	~sizepane.x1 =Sprite.x ~sizepane.y1 =Sprite.y ,size_icns =Sprite.addr

	$loop
		( draw ) #01 ~Sprite.x ~sizepane.x1 SUB2 8/ SWP POP ~brush.size EQU #02 MUL ADD =Sprite.color
		( incr ) ~Sprite.x 8+ =Sprite.x
		( incr ) ~Sprite.addr 8+ =Sprite.addr
		~Sprite.x ~sizepane.x2 LTH2 ^$loop JNZ

RTN

@draw-viewpane ( -- )
	
	( frame )
	~viewpane.x1 -- ~viewpane.y1 -- ~viewpane.x2 ~viewpane.y2 #00 ,line-rect JSR2
	~viewpane.x1 #0002 SUB2 ~viewpane.y1 #0002 SUB2 ~viewpane.x2 ~viewpane.y2 #01 ,line-rect JSR2

	~viewpane.x1 =Sprite.x ~viewpane.y1 =Sprite.y ,view_icns =Sprite.addr

	$loop
		( draw ) #01 =Sprite.color
		( incr ) ~Sprite.x 8+ =Sprite.x
		( incr ) ~Sprite.addr 8+ =Sprite.addr
		~Sprite.x ~viewpane.x2 LTH2 ^$loop JNZ

RTN

@draw-foreground
	
	,draw-toolpane JSR2
	,draw-pattpane JSR2
	,draw-sizepane JSR2
	,draw-viewpane JSR2

RTN

@draw-background
	
	( draw hor line )
	#0000 ~Screen.width ~Screen.height #0002 DIV2 ,line-horizontal-dotted JSR2
	( draw ver line )
	~Screen.width #0002 DIV2 #0000 ~Screen.height ,line-vertical-dotted JSR2

	( draw size )
	#0010 =Sprite.y
	( draw width )
	~Screen.width #00a0 SUB2 =Sprite.x ,font_hex ~canvas.w #f0 AND #04 SFT #08 MUL ADD2 =Sprite.addr
	( draw ) #01 =Sprite.color
	~Sprite.x 8+ =Sprite.x ,font_hex ~canvas.w #0f AND #08 MUL ADD2 =Sprite.addr
	( draw ) #01 =Sprite.color
	( draw height )
	~Sprite.x 8+ =Sprite.x ,font_hex ~canvas.h #f0 AND #04 SFT #08 MUL ADD2 =Sprite.addr
	( draw ) #01 =Sprite.color
	~Sprite.x 8+ =Sprite.x ,font_hex ~canvas.h #0f AND #08 MUL ADD2 =Sprite.addr
	( draw ) #01 =Sprite.color
	( draw save/load/guides icons )
	~Screen.height #0010 SUB2 =Sprite.y
	~Screen.width #0020 SUB2 =Sprite.x
	,filestate_icn =Sprite.addr
	#01 =Sprite.color
	~Sprite.x 8+ =Sprite.x
	,load_icn =Sprite.addr
	#01 =Sprite.color
	~Sprite.x 8+ =Sprite.x
	,save_icn =Sprite.addr
	#01 =Sprite.color
	( filename )
	#0008 =Sprite.x
	,path.name #01 ,draw-label JSR2

RTN

( Generics )

@line-rect ( x1 y1 x2 y2 color -- )

	( load ) =color =rect.y2 =rect.x2 DUP2 =Screen.y =rect.y1 DUP2 =Screen.x =rect.x1
	$hor
		( incr ) ~Screen.x ++ =Screen.x
		( draw ) ~rect.y1 =Screen.y ~color =Screen.color
		( draw ) ~rect.y2 =Screen.y ~color =Screen.color
		~Screen.x ~rect.x2 NEQ2 ^$hor JNZ
	~rect.y1 =Screen.y
	$ver
		( draw ) ~rect.x1 =Screen.x ~color =Screen.color
		( draw ) ~rect.x2 =Screen.x ~color =Screen.color
		( incr ) ~Screen.y ++ =Screen.y
		~Screen.y ~rect.y2 ++ NEQ2 ^$ver JNZ

RTN

@fill-rect ( x1 y1 x2 y2 color -- )

	( load ) =color =rect.y2 =rect.x2 DUP2 =Screen.y =rect.y1 DUP2 =Screen.x =rect.x1
	$ver
		~rect.x1 =Screen.x
		$hor
			( draw ) ~color =Screen.color
			( incr ) ~Screen.x ++ =Screen.x
			~Screen.x ~rect.x2 NEQ2 ^$hor JNZ
		( incr ) ~Screen.y ++ =Screen.y
		~Screen.y ~rect.y2 NEQ2 ^$ver JNZ

RTN

@draw-label ( addr -- )
	
	=color 
	$loop
		DUP2 PEK2 #00 SWP #0008 MUL2 ,font ADD2 =Sprite.addr
		( draw ) ~color =Sprite.color
		( incr ) #0001 ADD2
		( incr ) ~Sprite.x 8+ =Sprite.x
		( loop ) DUP2 PEK2 #00 NEQ ^$loop JNZ
	POP2

RTN

@line-horizontal-dotted ( x0 x1 y -- )
	
	=Screen.y OVR2 =Screen.x
	$draw-hor
		( draw ) #01 =Screen.color
		( incr ) SWP2 #0002 ADD2 DUP2 =Screen.x SWP2
		OVR2 OVR2 LTH2 ^$draw-hor JNZ
	POP2 POP2

RTN

@line-vertical-dotted ( x y0 y1 -- )
	
	STH2 SWP2 =Screen.x STH2r OVR2 =Screen.y
	$draw-ver
		( draw ) #01 =Screen.color
		( incr ) SWP2 #0002 ADD2 DUP2 =Screen.y SWP2
		OVR2 OVR2 LTH2 ^$draw-ver JNZ
	POP2 POP2

RTN

@strcpy ( src* dst* -- )

	$loop
		( copy src->dst ) OVR2 OVR2 SWP2 PEK2 ROT ROT POK2
		( incr dst ) ++
		( incr src ) SWP2 ++ SWP2
		OVR2 PEK2 #00 NEQ ^$loop JNZ
	#00 ROT ROT POK2 POP2
	
RTN

@size_icns    
	[ 0000 0010 0000 0000 ]
	[ 0000 1038 1000 0000 ]
	[ 0000 3838 3800 0000 ]
	[ 0010 387c 3810 0000 ]
	[ 0038 7c7c 7c38 0000 ]
	[ 1038 7cfe 7c38 1000 ]
	[ 387c fefe fe7c 3800 ]
	[ 7cfe fefe fefe 7c00 ]

@patt_icns 
	[ fefe fefe fefe fe00 ]
	[ fed6 aad6 aad6 fe00 ]
	[ fe92 82d6 8292 fe00 ]
	[ fe82 92aa 9282 fe00 ]
	[ fea6 ca92 a6ca fe00 ]
	[ feca a692 caa6 fe00 ]
	[ feaa aaaa aaaa fe00 ]	
	[ fe82 fe82 fe82 fe00 ]

@tool_icns 
	[ c0e0 5028 140a 0400 ]
	[ e0d0 a844 2212 0c00 ]
	[ c0b8 4848 7804 0200 ]
	[ 44ba 4444 44ba 4400 ]
	[ 3048 8484 4834 0200 ] ( zoom )
	[ 3245 8284 4834 0200 ] ( zoom out )

@view_icns 
	[ ee92 8a84 8a92 ee00 ]
	[ f68a 92a2 928a f600 ]
	[ fe82 8244 aa92 ee00 ]
	[ fe82 92aa 4482 fe00 ]

@brush_icns 
	[ 0000 0010 0000 0000 ]
	[ 0000 1028 1000 0000 ]
	[ 0000 3828 3800 0000 ]
	[ 0010 2844 2810 0000 ]
	[ 0038 4444 4438 0000 ]
	[ 1028 4482 4428 1000 ]
	[ 3844 8282 8244 3800 ]
	[ 7c82 8282 8282 7c00 ]
	[ 7cfe fefe fefe 7c00 ]

@bigpixel_icn 
	[ 5580 0080 0080 0080 ]
	[ 55ff 7fff 7fff 7fff ]

@pointers_icn
	[ 80c0 e0f0 f8e0 1000 ]
	[ 4040 4070 f8f8 f870 ]

@load_icn       [ feaa d6aa d4aa f400 ]
@save_icn       [ fe82 8282 848a f400 ]
@blank_icn      [ 0000 0000 0000 0000 ]
@filestate_icn  [ 1054 28c6 2854 1000 ] ( TODO, add to background! )
@untitled_txt   [ untitled.bit 00 ]

@font_hex ( 0-F TODO: should pull from @font instead.. ) 
[
	003c 464a 5262 3c00 0018 0808 0808 1c00
	003c 4202 3c40 7e00 003c 421c 0242 3c00
	000c 1424 447e 0400 007e 407c 0242 3c00
	003c 407c 4242 3c00 007e 0204 0810 1000
	003c 423c 4242 3c00 003c 4242 3e02 3c00
	003c 4242 7e42 4200 007c 427c 4242 7c00 
	003c 4240 4042 3c00 007c 4242 4242 7c00 
	007e 4078 4040 7e00 007e 4078 4040 4000
]

@font ( spectrum-zx font ) 
[
	0000 0000 0000 0000 0000 2400 7e3c 0000 0000 2400 3c42 0000 0000 6c7c 7c38 1000
	0010 387c 7c38 1000 0038 387c 6c10 3800 0010 387c 7c10 3800 0000 0018 1800 0000
	007e 4242 4242 7e00 0000 1824 2418 0000 0018 2442 4224 1800 001e 063a 4a48 3000
	0038 446c 107c 1000 000c 0808 0838 3800 003e 2222 2266 6600 0000 0822 0022 0800
	0000 1018 1c18 1000 0000 0818 3818 0800 0008 1c00 001c 0800 0028 2828 2800 2800
	003e 4a4a 3a0a 0a00 000c 3046 620c 3000 0000 0000 0000 ffff 0010 3800 3810 0038
	0008 1c2a 0808 0800 0008 0808 2a1c 0800 0000 0804 7e04 0800 0000 1020 7e20 1000
	0000 4040 7e00 0000 0000 0024 6624 0000 0000 1038 7c00 0000 0000 007c 3810 0000
	0000 0000 0000 0000 0008 0808 0800 0800 0014 1400 0000 0000 0024 7e24 247e 2400
	0008 1e28 1c0a 3c08 0042 0408 1020 4200 0030 4832 4c44 3a00 0008 1000 0000 0000
	0004 0808 0808 0400 0010 0808 0808 1000 0000 1408 3e08 1400 0000 0808 3e08 0800
	0000 0000 0008 0810 0000 0000 3c00 0000 0000 0000 0000 0800 0000 0204 0810 2000
	003c 464a 5262 3c00 0018 2808 0808 3e00 003c 4202 3c40 7e00 003c 421c 0242 3c00
	0008 1828 487e 0800 007e 407c 0242 3c00 003c 407c 4242 3c00 007e 0204 0810 1000
	003c 423c 4242 3c00 003c 4242 3e02 3c00 0000 0008 0000 0800 0000 0800 0008 0810
	0000 0810 2010 0800 0000 003e 003e 0000 0000 1008 0408 1000 003c 4202 0c00 0800
	003c 425a 5442 3c00 0018 2442 7e42 4200 007c 427c 4242 7c00 003c 4240 4042 3c00
	0078 4442 4244 7800 007e 407c 4040 7e00 003e 4040 7c40 4000 003c 4240 4e42 3c00
	0042 427e 4242 4200 003e 0808 0808 3e00 0002 0202 4242 3c00 0044 4870 4844 4200
	0040 4040 4040 7e00 0042 665a 4242 4200 0042 6252 4a46 4200 003c 4242 4242 3c00
	007c 4242 7c40 4000 003c 4242 524a 3c00 007c 4242 7c44 4200 003c 403c 0242 3c00
	00fe 1010 1010 1000 0042 4242 4242 3c00 0042 4242 4224 1800 0042 4242 5a66 4200
	0042 2418 1824 4200 0082 4428 1010 1000 007e 0408 1020 7e00 000c 0808 0808 0c00
	0040 2010 0804 0200 0018 0808 0808 1800 0008 1422 0000 0000 0000 0000 0000 7e00
	0008 0400 0000 0000 0000 1c02 1e22 1e00 0020 203c 2222 3c00 0000 1e20 2020 1e00
	0002 021e 2222 1e00 0000 1c22 3c20 1e00 000c 101c 1010 1000 0000 1c22 221e 021c
	0020 202c 3222 2200 0008 0018 0808 0400 0008 0008 0808 4830 0020 2428 3028 2400
	0010 1010 1010 0c00 0000 6854 5454 5400 0000 5864 4444 4400 0000 3844 4444 3800
	0000 7844 4478 4040 0000 3c44 443c 0406 0000 2c30 2020 2000 0000 3840 3804 7800
	0010 103c 1010 0c00 0000 4444 4444 3800 0000 4444 2828 1000 0000 4454 5454 2800
	0000 4428 1028 4400 0000 4444 443c 0438 0000 7c08 1020 7c00 000c 0810 1008 0c00
	0008 0808 0808 0800 0030 1008 0810 3000 0000 0032 4c00 0000 3c42 99a1 a199 423c
]

@ERROR BRK 

|2100 @data