( utility macros )

%INC-X { .Screen/x DEI2 #0008 ADD2 .Screen/x DEO2 } ( -- )
%INC-Y { .Screen/y DEI2 #0008 ADD2 .Screen/y DEO2 } ( -- )

%CENTER-X { .Screen/width DEI2 #01 SFT2 }
%CENTER-Y { .Screen/height DEI2 #01 SFT2 }

%MOD { DIVk MUL SUB }
%MOD2 { DIV2k MUL2 SUB2 }

%NEXT-TILE { DUP2 #0010 ADD2 }

%RTN { JMP2r }

( devices )

|00 @System     [ &vector $2 &wst      $1 &rst    $1 &pad   $4 &r      $2 &g      $2 &b    $2 &debug  $1 &halt $1 ]
|10 @Console    [ &vector $2 &read     $1 &pad    $5 &write $1 &error  $1 ]
|20 @Screen     [ &vector $2 &width    $2 &height $2 &pad   $2 &x      $2 &y      $2 &addr $2 &pixel  $1 &sprite $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 ]
|80 @Controller [ &vector $2 &button   $1 &key    $1 ]
|90 @Mouse      [ &vector $2 &x        $2 &y      $2 &state $1 &wheel  $1 ]
|a0 @File       [ &vector $2 &success  $2 &offset $2 &pad   $2 &name   $2 &length $2 &load $2 &save   $2 ]
|b0 @DateTime   [ &year   $2 &month    $1 &day    $1 &hour  $1 &minute $1 &second $1 &dotw $1 &doty   $2 &isdst $1 ]

( variables )

|0000

@state $1
@ticker $1

@logo-coords [
  &x $2
  &y $2
]

@cart $64
@realm $64

( program )

|0100 
@init ( -> )

  ( steppewnolf-dark theme ) 
  #02c1 .System/r DEO2 
  #02cd .System/g DEO2 
  #02cb .System/b DEO2

  ;spritesheet .File/name DEO2
  #0100 .File/length DEO2
	
  #0000 .File/offset DEO2
  ;uxnlogo .File/load DEO2
  
  #0200 .File/offset DEO2
  ;xrxslogo .File/load DEO2

  #00 .ticker STZ
  #00 .state STZ
  
  CENTER-X .logo-coords/x STZ2
  CENTER-Y .logo-coords/y STZ2
  
  ;on-frame .Screen/vector DEO2
  
BRK

@on-frame ( -> )

  ( draw a piece of the logos ~ every half second )
  
  .ticker LDZ #01 ADD
  DUP #20 EQU ,&next-render JCN
  .ticker STZ
  BRK
  
  &next-render .state LDZ
  #00 .ticker STZ
  DUP #00 NEQ ,&state1 JCN
    ;draw-uxn-logo JSR2
    #01 ADD .state STZ
  BRK
  &state1 DUP #01 NEQ ,&state2 JCN
    ;draw-xrxs-logo-xr JSR2
    #01 ADD .state STZ
  BRK
  &state2 DUP #02 NEQ ,&state3 JCN
    ;draw-xrxs-logo-xs JSR2
    #01 ADD .state STZ
  BRK
  &state3
BRK

@draw-uxn-logo ( -> )

  .logo-coords/x LDZ2 #0020 SUB2 .Screen/x DEO2
  .logo-coords/y LDZ2 #0010 SUB2 .Screen/y DEO2
  
  #0100 #0000 &while EQU2k ,&end JCN
    DUP2 ;uxnlogo ADD2 .Screen/addr DEO2
    #81 .Screen/sprite DEO INC-X
    
    NEXT-TILE #0030 AND2 #0000 NEQ2 ,&no-inc-y JCN
      .logo-coords/x LDZ2 #0020 SUB2 .Screen/x DEO2
      INC-Y
    &no-inc-y
  #0010 ADD2 ,&while JMP &end POP2 POP2
  
RTN

@draw-xrxs-logo-xr ( -> )

  .logo-coords/x LDZ2 .Screen/x DEO2
  .logo-coords/y LDZ2 #0010 SUB2 .Screen/y DEO2
  
  #0080 #0000 &while EQU2k ,&end JCN
    DUP2 ;xrxslogo ADD2 .Screen/addr DEO2
    #81 .Screen/sprite DEO INC-X
    
    NEXT-TILE #0030 AND2 #0000 NEQ2 ,&no-inc-y JCN
      .logo-coords/x LDZ2 .Screen/x DEO2
      INC-Y
    &no-inc-y
  #0010 ADD2 ,&while JMP &end POP2 POP2
  
RTN

@draw-xrxs-logo-xs ( -> )

  .logo-coords/x LDZ2 .Screen/x DEO2
  .logo-coords/y LDZ2 .Screen/y DEO2
  
  #0100 #0080 &while EQU2k ,&end JCN
    DUP2 ;xrxslogo ADD2 .Screen/addr DEO2
    #81 .Screen/sprite DEO INC-X
    
    NEXT-TILE #0030 AND2 #0000 NEQ2 ,&no-inc-y JCN
      .logo-coords/x LDZ2 .Screen/x DEO2
      INC-Y
    &no-inc-y
  #0010 ADD2 ,&while JMP &end POP2 POP2
  
RTN

( constants )
@spritesheet "xrxs.chr 00

( sprites )
@uxnlogo $128
@xrxslogo $128