mirror of https://git.sr.ht/~rabbits/uxn
75 lines
1.7 KiB
Plaintext
75 lines
1.7 KiB
Plaintext
( draw routines )
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:dev/r fff8 ( std read port )
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:dev/w fff9 ( std write port )
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;color 1 ;x1 2 ;x2 2 ;y1 2 ;y2 2
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|0100 @RESET
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#01 =dev/w ( set dev/write to screen )
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#01 =color
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#0010 #0020 #0040 #0060 ,fill-rect JSR
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#02 =color
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#0020 #0030 #0050 #0070 ,fill-rect JSR
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#03 =color
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#0030 #0040 #0060 #0080 ,fill-rect JSR
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#01 =color
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#0070 #0020 #00a0 #0060 ,line-rect JSR
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#02 =color
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#0080 #0030 #00b0 #0070 ,line-rect JSR
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#03 =color
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#0090 #0040 #00c0 #0080 ,line-rect JSR
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BRK
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@line-ver ( x1 y1 y2 )
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=y2 =y1 =x1
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@line-ver-loop
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( draw ) ~x1 ~y1 IOW2 IOW2 ~color IOW
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( incr ) ~y1 #0001 ADD2 DUP2 =y1
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~y2 NEQ2 ,line-ver-loop ROT JMP? POP2
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RTS
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@line-hor ( x1 y1 x2 )
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=x2 =y1 =x1
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@line-hor-loop
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( draw ) ~x1 ~y1 IOW2 IOW2 ~color IOW
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( incr ) ~x1 #0001 ADD2 DUP2 =x1
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~x2 NEQ2 ,line-hor-loop ROT JMP? POP2
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RTS
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@line-rect ( x1 y1 x2 y2 )
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=y2 =x2 ( stash x1 y1 ) DUP2 WSR2 =y1 DUP2 WSR2 =x1
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@line-rect-hor
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( draw ) ~x1 ~y1 IOW2 IOW2 ~color IOW
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( draw ) ~x1 ~y2 IOW2 IOW2 ~color IOW
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( incr ) ~x1 #0001 ADD2 DUP2 =x1
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~x2 #0001 ADD2 LTH2 ,line-rect-hor ROT JMP? POP2
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( restore x1 y1 ) RSW2 =x1 RSW2 =y1
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@line-rect-ver
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( incr ) ~y1 #0001 ADD2 DUP2 =y1
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( draw ) ~x1 ~y1 IOW2 IOW2 ~color IOW
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( draw ) ~x2 ~y1 IOW2 IOW2 ~color IOW
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~y2 #0001 SUB2 LTH2 ,line-rect-ver ROT JMP? POP2
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RTS
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@fill-rect ( x1 y1 x2 y2 )
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=y2 =x2 ( stash x1 y1 ) =y1 DUP2 WSR2 =x1
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@fill-rect-ver
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RSW2 DUP2 =x1 WSR2
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@fill-rect-hor
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( draw ) ~x1 ~y1 IOW2 IOW2 ~color IOW
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( incr ) ~x1 #0001 ADD2 DUP2 =x1
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~x2 LTH2 ,fill-rect-hor ROT JMP? POP2
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~y1 #0001 ADD2 DUP2 =y1
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~y2 LTH2 ,fill-rect-ver ROT JMP? POP2
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RSW2 POP2
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RTS
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|c000 @FRAME BRK
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|d000 @ERROR BRK
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|FFF0 [ 0f0f 0fff 0ff0 ] ( palette )
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|FFFA .RESET .FRAME .ERROR ( vectors ) |