( piano )

%RTN { JMP2r }
%8+ { #0008 ADD2 }
%8/ { #0008 DIV2 }
%2/ { #0002 DIV2 }
%++ { #0001 ADD2 }
%TOS { #00 SWP }
%MOD { DUP2 DIV MUL SUB }

%WAVEFORM { #1000 }

( devices )

|00 @System     [ &vector $2 &pad      $6 &r      $2 &g     $2 &b      $2 ]
|10 @Console    [ &pad    $8 &char     $1 &byte   $1 &short $2 &string $2 ]
|20 @Screen     [ &vector $2 &width    $2 &height $2 &pad   $2 &x      $2 &y      $2 &addr $2 &color $1 ]
|30 @Audio0     [ &vector $2 &position $2 &output $1 &pad   $3 &adsr   $2 &length $2 &addr $2 &volume $1 &pitch $1 ]
|40 @Audio1     [ &vector $2 &position $2 &output $1 &pad   $3 &adsr   $2 &length $2 &addr $2 &volume $1 &pitch $1 ]
|50 @Audio2     [ &vector $2 &position $2 &output $1 &pad   $3 &adsr   $2 &length $2 &addr $2 &volume $1 &pitch $1 ]
|60 @Audio3     [ &vector $2 &position $2 &output $1 &pad   $3 &adsr   $2 &length $2 &addr $2 &volume $1 &pitch $1 ]
|70 @Midi       [ &vector $2 &channel  $1 &note   $1 &velocity $1 ]
|80 @Controller [ &vector $2 &button   $1 &key    $1 ]
|90 @Mouse      [ &vector $2 &x        $2 &y      $2 &state $1 &chord  $1 ]
|a0 @File       [ &vector $2 &success  $2 &offset $2 &pad   $2 &name  $2 &length $2 &load $2 &save $2 ]

( variables )

|0000

@last-note $1
@octave $1
@addr $1
@color $1
@pointer     [ &x $2 &y $2 ]
@knob        [ &x $2 &y $2 &value $1 ]
@center      [ &x $2 &y $2 ]
@adsr-view   [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
@wave-view   [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
@octave-view [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]

( program )

|0100 ( -> )
	
	( theme ) 
	#0fe5 .System/r DEO2 
	#0fc5 .System/g DEO2 
	#0f25 .System/b DEO2

	( vectors ) 
	;on-control .Controller/vector DEO2
	;on-mouse .Mouse/vector DEO2
	;on-midi .Midi/vector DEO2
	;on-frame .Screen/vector DEO2

	( load waveform )
	;sin-path .File/name DEO2 #0100 .File/length DEO2 WAVEFORM .File/load DEO2
	;tri-path .File/name DEO2 #0100 .File/length DEO2 WAVEFORM #0100 ADD2 .File/load DEO2
	;sqr-path .File/name DEO2 #0100 .File/length DEO2 WAVEFORM #0200 ADD2 .File/load DEO2

	( find center )
	.Screen/width DEI2 2/ .center/x POK2
	.Screen/height DEI2 2/ .center/y POK2

	( place octave )
	.center/x PEK2 #0080 SUB2 .octave-view/x1 POK2
	.center/y PEK2 8+ .octave-view/y1 POK2
	.octave-view/x1 PEK2 #0050 ADD2 .octave-view/x2 POK2
	.octave-view/y1 PEK2 #0018 ADD2 .octave-view/y2 POK2

	( place adsr )
	.center/x PEK2 #0020 SUB2 .adsr-view/x1 POK2
	.center/y PEK2 8+ .adsr-view/y1 POK2
	.adsr-view/x1 PEK2 #00a0 ADD2 .adsr-view/x2 POK2
	.adsr-view/y1 PEK2 #0018 ADD2 .adsr-view/y2 POK2

	( place waveform )
	.center/x PEK2 #0080 SUB2 .wave-view/x1 POK2
	.center/y PEK2 #0020 SUB2 .wave-view/y1 POK2
	.wave-view/x1 PEK2 #0100 ADD2 .wave-view/x2 POK2
	.wave-view/y1 PEK2 #0020 ADD2 .wave-view/y2 POK2

	( default settings )
	#ff .last-note POK
	#048c .Audio0/adsr DEO2
	#88 .Audio0/volume DEO
	WAVEFORM .Audio0/addr DEO2
	#0100 .Audio0/length DEO2

	#011a .Audio1/adsr DEO2
	#88 .Audio1/volume DEO
	WAVEFORM #0100 ADD2 .Audio1/addr DEO2
	#0100 .Audio1/length DEO2

	#1118 .Audio2/adsr DEO2
	#88 .Audio2/volume DEO
	WAVEFORM #0200 ADD2 .Audio2/addr DEO2
	#0100 .Audio2/length DEO2

	( inital drawing ) 
	;draw-octave JSR2
	;draw-adsr JSR2
	;draw-wave JSR2

BRK

@on-frame ( -> )
	
	.wave-view/x1 PEK2 #0028 ADD2 .Screen/x DEO2
	.wave-view/y1 PEK2 #0010 SUB2 .Screen/y DEO2
	.Audio0/output DEI #04 SFT TOS #0008 MUL2 ;meter ADD2 .Screen/addr DEO2
	#21 .Screen/color DEO

BRK

@on-midi ( -> )
	
	.Midi/note DEI #00 NEQ ,&note-on JNZ BRK &note-on
	.Midi/note DEI .Audio0/pitch .Midi/channel DEI #04 MOD #10 MUL ADD DEO

BRK

@on-mouse ( -> )

	;draw-cursor JSR2 
	.Mouse/state DEI #00 NEQ ,&no-touch JNZ BRK &no-touch
	( wave-view )
	.Mouse/x DEI2 DUP2 .wave-view/x1 PEK2 GTH2 ROT ROT .wave-view/x2 PEK2 #0001 ADD2 LTH2 #0101 EQU2
	.Mouse/y DEI2 DUP2 .wave-view/y1 PEK2 GTH2 ROT ROT .wave-view/y2 PEK2 LTH2 #0101 EQU2
	#0101 EQU2 ;on-touch-wave-view JNZ2
	( adsr-view )
	.Mouse/x DEI2 DUP2 .adsr-view/x1 PEK2 GTH2 ROT ROT .adsr-view/x2 PEK2 LTH2 #0101 EQU2
	.Mouse/y DEI2 DUP2 .adsr-view/y1 PEK2 GTH2 ROT ROT .adsr-view/y2 PEK2 LTH2 #0101 EQU2
	#0101 EQU2 ;on-touch-adsr-view JNZ2
	( octave-view )
	.Mouse/x DEI2 DUP2 .octave-view/x1 PEK2 GTH2 ROT ROT .octave-view/x2 PEK2 LTH2 #0101 EQU2
	.Mouse/y DEI2 DUP2 .octave-view/y1 PEK2 GTH2 ROT ROT .octave-view/y2 PEK2 LTH2 #0101 EQU2
	#0101 EQU2 ;on-touch-octave-view JNZ2

BRK

@on-touch-wave-view ( -> )

	.Mouse/x DEI2 .wave-view/x1 PEK2 SUB2 .Audio0/length DEO2
	;draw-wave JSR2
	;draw-cursor JSR2 

BRK

@on-touch-octave-view ( -> )

	.Mouse/x DEI2 .octave-view/x1 PEK2 SUB2 8/ SWP POP #09 NEQ ,&no-mod JNZ
		.Mouse/y DEI2 .octave-view/y1 PEK2 SUB2 8/ SWP POP 
		DUP #00 NEQ ,&no-incr JNZ
			.octave PEK #01 ADD .octave POK &no-incr
		DUP #02 NEQ ,&no-decr JNZ
			.octave PEK #01 SUB .octave POK &no-decr
		POP
		( release ) #00 .Mouse/state DEO
		;draw-octave JSR2
		BRK
	&no-mod

	.Mouse/x DEI2 .octave-view/x1 PEK2 SUB2 8/ SWP POP #06 GTH ,&no-key JNZ
		.Mouse/x DEI2 .octave-view/x1 PEK2 SUB2 8/ DUP2 SWP POP .last-note POK ;notes ADD2 GET ;play JSR2
		( release ) #00 .Mouse/state DEO
		;draw-octave JSR2
	&no-key

BRK 

@on-touch-adsr-view ( -> )

	.Mouse/x DEI2 .adsr-view/x1 PEK2 SUB2 8/ SWP POP #03 DIV
	DUP #00 NEQ ,&no-a JNZ
		.Audio0/adsr DEI
		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
		.Audio0/adsr DEO &no-a
	DUP #01 NEQ ,&no-d JNZ
		.Audio0/adsr DEI
		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
		.Audio0/adsr DEO &no-d
	DUP #02 NEQ ,&no-s JNZ
		.Audio0/adsr #01 ADD DEI
		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
		.Audio0/adsr #01 ADD DEO &no-s
	DUP #03 NEQ ,&no-r JNZ
		.Audio0/adsr #01 ADD DEI
		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
		.Audio0/adsr #01 ADD DEO &no-r
	DUP #05 NEQ ,&no-left JNZ
		.Audio0/volume DEI 
		#10 .Mouse/state DEI #10 EQU #e0 MUL ADD ADD
		.Audio0/volume DEO &no-left
	DUP #06 NEQ ,&no-right JNZ
		.Audio0/volume DEI
		DUP #f0 AND STH #01 .Mouse/state DEI #10 EQU #0e MUL ADD ADD #0f AND STHr ADD
		.Audio0/volume DEO &no-right
	POP

	( release ) #00 .Mouse/state DEO
	;draw-adsr JSR2
	;draw-cursor JSR2 

BRK

@on-control ( -> )

	( clear last cursor )
	;clear .Screen/addr DEO2 
	.pointer/x PEK2 .Screen/x DEO2 
	.pointer/y PEK2 .Screen/y DEO2 
	#30 .Screen/color DEO

	.Controller/key DEI
	DUP #61 NEQ ,&no-c JNZ
		#00 .last-note POK ;notes GET ;play JSR2 &no-c
	DUP #73 NEQ ,&no-d JNZ
		#01 .last-note POK ;notes ++ GET ;play JSR2 &no-d
	DUP #64 NEQ ,&no-e JNZ
		#02 .last-note POK ;notes #0002 ADD2 GET ;play JSR2 &no-e
	DUP #66 NEQ ,&no-f JNZ
		#03 .last-note POK ;notes #0003 ADD2 GET ;play JSR2 &no-f
	DUP #67 NEQ ,&no-g JNZ
		#04 .last-note POK ;notes #0004 ADD2 GET ;play JSR2 &no-g
	DUP #68 NEQ ,&no-a JNZ
		#05 .last-note POK ;notes #0005 ADD2 GET ;play JSR2 &no-a
	DUP #6a NEQ ,&no-b JNZ
		#06 .last-note POK ;notes #0006 ADD2 GET ;play JSR2 &no-b
	DUP #6b NEQ ,&no-c2 JNZ
		#07 .last-note POK ;notes #0007 ADD2 GET ;play JSR2 &no-c2
	POP

	.Controller/button DEI #f0 AND
	DUP #04 SFT #01 AND #01 NEQ ,&no-up JNZ
		( move ) .Audio0/addr DEI2 #0001 SUB2 .Audio0/addr DEO2 &no-up
	DUP #05 SFT #01 AND #01 NEQ ,&no-down JNZ
		( move ) .Audio0/addr DEI2 #0001 ADD2 .Audio0/addr DEO2 &no-down
	DUP #06 SFT #01 AND #01 NEQ ,&no-left JNZ
		( move ) .Audio0/addr DEI2 #0010 SUB2 .Audio0/addr DEO2 &no-left
	DUP #07 SFT #01 AND #01 NEQ ,&no-right JNZ
		( move ) .Audio0/addr DEI2 #0010 ADD2 .Audio0/addr DEO2 &no-right
	POP

	;draw-octave JSR2
	;draw-wave JSR2

BRK

@play ( pitch -- )
	
	DUP .octave PEK #0c MUL ADD .Audio0/pitch DEO

RTN

@draw-cursor ( -- )
	
	( clear last cursor )
	;clear .Screen/addr DEO2 
	.pointer/x PEK2 .Screen/x DEO2 
	.pointer/y PEK2 .Screen/y DEO2 
	#30 .Screen/color DEO
	( record pointer positions )
	.Mouse/x DEI2 .pointer/x POK2 
	.Mouse/y DEI2 .pointer/y POK2
	( draw new cursor )
	;cursor .Screen/addr DEO2 
	.pointer/x PEK2 .Screen/x DEO2 
	.pointer/y PEK2 .Screen/y DEO2 
	( colorize on state )
	#31 [ .Mouse/state DEI #00 NEQ ] ADD .Screen/color DEO

RTN

@draw-octave ( -- )
	
	.octave-view/x1 PEK2 .octave-view/y1 PEK2

	OVR2 OVR2 ;keys-left-icns #21 .last-note PEK #00 EQU ADD ;draw-key JSR2
	OVR2 8+ OVR2 ;keys-middle-icns #21 .last-note PEK #01 EQU ADD ;draw-key JSR2
	OVR2 #0010 ADD2 OVR2 ;keys-right-icns #21 .last-note PEK #02 EQU ADD ;draw-key JSR2
	OVR2 #0018 ADD2 OVR2 ;keys-left-icns #21 .last-note PEK #03 EQU ADD ;draw-key JSR2
	OVR2 #0020 ADD2 OVR2 ;keys-middle-icns #21 .last-note PEK #04 EQU ADD ;draw-key JSR2
	OVR2 #0028 ADD2 OVR2 ;keys-middle-icns #21 .last-note PEK #05 EQU ADD ;draw-key JSR2
	SWP2 #0030 ADD2 SWP2 ;keys-right-icns #21 .last-note PEK #06 EQU ADD ;draw-key JSR2

	.octave-view/x1 PEK2 #0048 ADD2 .Screen/x DEO2

	;arrow-icns .Screen/addr DEO2
	.octave-view/y1 PEK2 .Screen/y DEO2
	#21 .Screen/color DEO

	;arrow-icns 8+ .Screen/addr DEO2
	.octave-view/y1 PEK2 #0010 ADD2 .Screen/y DEO2
	#21 .Screen/color DEO

	;font-hex .octave PEK #03 ADD #00 SWP #0008 MUL2 ADD2 .Screen/addr DEO2
	.octave-view/y1 PEK2 8+ .Screen/y DEO2
	#23 .Screen/color DEO

RTN

@draw-key ( x* y* addr* color -- )
		
	STH
	.Screen/addr DEO2 
	SWP2 .Screen/x DEO2
	DUP2 #0018 ADD2
	&loop
		( move ) OVR2 .Screen/y DEO2
		( draw ) DUPr STHr .Screen/color DEO
		( incr ) .Screen/addr DEI2 8+ .Screen/addr DEO2  
		( incr ) SWP2 8+ SWP2
		OVR2 OVR2 LTH2 ,&loop JNZ
	POP2 POP2 
	POPr

RTN

@draw-adsr ( -- )

	.adsr-view/x1 PEK2 .adsr-view/y1 PEK2
		.Audio0/adsr DEI #04 SFT
		;draw-knob JSR2
	.adsr-view/x1 PEK2 #0018 ADD2 .adsr-view/y1 PEK2
		.Audio0/adsr DEI #0f AND
		;draw-knob JSR2
	.adsr-view/x1 PEK2 #0030 ADD2 .adsr-view/y1 PEK2
		.Audio0/adsr #01 ADD DEI #04 SFT
		;draw-knob JSR2
	.adsr-view/x1 PEK2 #0048 ADD2 .adsr-view/y1 PEK2
		.Audio0/adsr #01 ADD DEI #0f AND
		;draw-knob JSR2

	( volume )
	.adsr-view/x2 PEK2 #0028 SUB2 .adsr-view/y1 PEK2
		.Audio0/volume DEI #04 SFT
		;draw-knob JSR2
	.adsr-view/x2 PEK2 #0010 SUB2 .adsr-view/y1 PEK2
		.Audio0/volume DEI #0f AND
		;draw-knob JSR2

RTN

@draw-wave ( -- )
	
	.wave-view/x1 PEK2
	.wave-view/y1 PEK2
	.wave-view/x2 PEK2 ++
	.wave-view/y2 PEK2
	#00 ;fill-rect JSR2

	#01 ;draw-wave-length JSR2

	.wave-view/x1 PEK2 .Screen/x DEO2

	( waveform )
	#00 #ff
	&loop
		( dotted line )
		OVR #01 AND ,&no-dot JNZ 
			.wave-view/y1 PEK2 #0010 ADD2 .Screen/y DEO2
			#03 .Screen/color DEO
		&no-dot
		OVR TOS .Audio0/addr DEI2 ADD2 GET 
		#02 DIV #40 ADD DUP #07 SFT #80 MUL SUB 
		TOS #0004 DIV2 .wave-view/y1 PEK2 ADD2 .Screen/y DEO2
		.Screen/x DEI2 ++ .Screen/x DEO2
		( draw ) OVR .Audio0/length DEI2 SWP POP GTH #02 MUL #01 ADD .Screen/color DEO
		( incr ) SWP #01 ADD SWP
		DUP2 LTH ,&loop JNZ
	POP2

	( range )
	.wave-view/x1 PEK2 .Screen/x DEO2
	.wave-view/y1 PEK2 #0010 SUB2 .Screen/y DEO2
	.Audio0/addr DEI2 #22 ;draw-short JSR2
	.wave-view/x2 PEK2 #0020 SUB2 .Screen/x DEO2
	.Audio0/length DEI2 #22 ;draw-short JSR2

RTN

@draw-wave-length ( color -- )
	
	STH
	.wave-view/x1 PEK2 .Audio0/length DEI2 ADD2 .Screen/x DEO2
	.wave-view/y1 PEK2 DUP2 #0020 ADD2
	&loop
		OVR2 .Screen/y DEO2
		( draw ) DUPr STHr .Screen/color DEO
		( incr ) SWP2 ++ SWP2
		OVR2 OVR2 LTH2 ,&loop JNZ
	POP2 POP2
	POPr

RTN

@draw-knob ( x* y* value -- )

	( load ) .knob/value POK .knob/y POK2 .knob/x POK2

	.knob/x PEK2 .Screen/x DEO2
	.knob/y PEK2 .Screen/y DEO2 ;knob_icns .Screen/addr DEO2 #21 .Screen/color DEO
	.knob/x PEK2 8+ .Screen/x DEO2 ;knob_icns 8+ .Screen/addr DEO2 #21 .Screen/color DEO
	.knob/y PEK2 8+ .Screen/y DEO2 ;knob_icns #0018 ADD2 .Screen/addr DEO2 #21 .Screen/color DEO
	.knob/x PEK2 .Screen/x DEO2 ;knob_icns #0010 ADD2 .Screen/addr DEO2 #21 .Screen/color DEO
	.knob/x PEK2 #00 #00 .knob/value PEK ;knob-offsetx ADD2 GET ADD2 .Screen/x DEO2
	.knob/y PEK2 #00 #00 .knob/value PEK ;knob-offsety ADD2 GET ADD2 .Screen/y DEO2
	;knob_icns #0020 ADD2 .Screen/addr DEO2
	#25 .Screen/color DEO
	.knob/x PEK2 #0004 ADD2 .Screen/x DEO2
	.knob/y PEK2 #0010 ADD2 .Screen/y DEO2
	;font-hex #00 .knob/value PEK #08 MUL ADD2 .Screen/addr DEO2
	#21 .Screen/color DEO

RTN

@draw-short ( short* color -- )

	STH SWP 
	DUP #04 SFT TOS #0008 MUL2 ;font-hex ADD2 .Screen/addr DEO2
	( draw ) DUPr STHr .Screen/color DEO
	#0f AND TOS #0008 MUL2 ;font-hex ADD2 .Screen/addr DEO2
	.Screen/x DEI2 8+ .Screen/x DEO2
	( draw ) DUPr STHr .Screen/color DEO
	DUP #04 SFT TOS #0008 MUL2 ;font-hex ADD2 .Screen/addr DEO2
	.Screen/x DEI2 8+ .Screen/x DEO2
	( draw ) DUPr STHr .Screen/color DEO
	#0f AND TOS #0008 MUL2 ;font-hex ADD2 .Screen/addr DEO2
	.Screen/x DEI2 8+ .Screen/x DEO2
	( draw ) STHr .Screen/color DEO

RTN

@fill-rect ( x1* y1* x2* y2* color -- )
	
	.color POK
	( x1 x2 y1 y2 ) ROT2 SWP2
	&ver
		( save ) OVR2 .Screen/y DEO2
		STH2 STH2 OVR2 OVR2
		&hor
			( save ) OVR2 .Screen/x DEO2
			( draw ) .color PEK .Screen/color DEO
			( incr ) SWP2 ++ SWP2
			OVR2 OVR2 LTS2 ,&hor JNZ
		POP2 POP2 STH2r STH2r
		( incr ) SWP2 ++ SWP2
		OVR2 OVR2 LTS2 ,&ver JNZ
	POP2 POP2 POP2 POP2

RTN

@clear  [ 
	0000 0000 0000 0000 ]

@cursor [ 
	80c0 e0f0 f8e0 1000 ]

@arrow-icns [
	0010 387c fe10 1000
	0010 1010 fe7c 3810 ]

@notes [
	3c 3e 40 41 43 45 47
	48 4a 4c 4d 4f 51 53 ]

@keys-left-icns [
	7c7c 7c7c 7c7c 7c7c
	7c7c 7c7c 7c7c 7e7f
	7f7f 7f7f 7f7f 3e00 ]

@keys-middle-icns [
	1c1c 1c1c 1c1c 1c1c
	1c1c 1c1c 1c1c 3e7f
	7f7f 7f7f 7f7f 3e00 ]

@keys-right-icns [
	1f1f 1f1f 1f1f 1f1f
	1f1f 1f1f 1f1f 3f7f
	7f7f 7f7f 7f7f 3e00 ]

@knob_icns [
	0003 0c10 2020 4040
	00c0 3008 0404 0202
	4040 2020 100c 0300
	0202 0404 0830 c000
	0000 183c 3c18 0000 ]

@knob-offsetx [
	01 00 00 00 00 01 02 03
	05 06 07 08 08 08 08 07 ]

@knob-offsety [
	07 06 05 03 02 01 00 00
	00 00 01 02 03 05 06 07 ]

@meter [
	0000 0000 0000 0000
	0000 0000 0000 0070 
	0000 0000 0000 007e
	0000 0000 0000 707e
	0000 0000 0070 7e7e
	0000 0000 007e 7e7e
	0000 0000 707e 7e7e
	0000 0000 7e7e 7e7e
	0000 0070 7e7e 7e7e
	0000 007e 7e7e 7e7e
	0000 707e 7e7e 7e7e
	0000 7e7e 7e7e 7e7e
	0070 7e7e 7e7e 7e7e
	007e 7e7e 7e7e 7e7e
	707e 7e7e 7e7e 7e7e
	7e7e 7e7e 7e7e 7e7e ]

@font-hex ( 0-F )
[
	007c 8282 8282 827c 0030 1010 1010 1010
	007c 8202 7c80 80fe 007c 8202 1c02 827c
	000c 1424 4484 fe04 00fe 8080 7c02 827c
	007c 8280 fc82 827c 007c 8202 1e02 0202
	007c 8282 7c82 827c 007c 8282 7e02 827c
	007c 8202 7e82 827e 00fc 8282 fc82 82fc
	007c 8280 8080 827c 00fc 8282 8282 82fc
	007c 8280 f080 827c 007c 8280 f080 8080 ]

@sin-path "projects/sounds/sin.pcm $1
@tri-path "projects/sounds/tri.pcm $1
@sqr-path "projects/sounds/sqr.pcm $1