69 lines
1.5 KiB
Tal
69 lines
1.5 KiB
Tal
|00 @System &vector $2 &expansion $2 &wst $1 &rst $1 &metadata $2 &r $2 &g $2 &b $2 &debug $1 &state $1
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|20 @Screen &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
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|0100
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@on-reset ( -> )
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#f07f .System/r DEO2
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#f0d6 .System/g DEO2
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#f0b2 .System/b DEO2
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#0020 DUP2 .Screen/x DEO2
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.Screen/y DEO2
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#0050 DUP2 .Screen/width DEO2
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.Screen/height DEO2
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( | begin )
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;sample <draw-sixels>
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BRK
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@<draw-sixels> ( data* -- )
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[ LIT2 02 -Screen/auto ] DEO
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.Screen/x DEI2 ,&anchor STR2
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&w ( -- )
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LDAk [ LIT "$ ] EQU ?&op-over
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LDAk [ LIT "- ] EQU ?&op-line
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LDAk [ LIT "! ] EQU ?&op-rle
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LDAk [ LIT "? ] SUB <draw-sixels>/op-col
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& INC2 LDAk ?&w
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POP2 JMP2r
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&op-line ( -- )
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.Screen/y DEI2k #0006 ADD2 ROT DEO2
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&op-over ( -- )
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[ LIT2 &anchor $2 ] .Screen/x DEO2
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!&
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@<draw-sixels>/op-rle ( addr* -- addr* )
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( rune ) INC2
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( length ) sdec
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( target ) OVR2 LDA ,&t STR
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#0000
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&l ( -- )
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[ LIT &t $1 ] <draw-sixels>/op-col
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INC2 GTH2k ?&l
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POP2 POP2 INC2 !<draw-sixels>/
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@<draw-sixels>/op-col ( byte -- )
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,&t STR
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#0600
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&l ( -- )
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[ LIT &t $1 ] OVR SFT #01 AND .Screen/pixel DEO
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INC GTHk ?&l
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POP2
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( | advance )
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.Screen/x DEI2k INC2 ROT DEO2
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.Screen/y DEI2k #0006 SUB2 ROT DEO2
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JMP2r
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@sdec ( str* -- str* val* )
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[ LIT2r 0000 ]
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&w ( -- )
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( validate ) LDAk [ LIT "0 ] SUB #09 GTH ?&end
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( accumulate ) [ LIT2r 000a ] MUL2r
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( combine ) LDAk [ LIT "0 ] SUB [ LITr 00 ] STH ADD2r
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( continue ) INC2 LDAk ?&w
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&end STH2r JMP2r
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@sample [ "???owYn||~ywo??-?IRJaVNn^NVbJRI $1 ]
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@sample-rle [ "||||!12w $1 ]
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