112 lines
2.4 KiB
Plaintext
112 lines
2.4 KiB
Plaintext
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( dev/screen )
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%RTN { JMP2r }
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( devices )
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|00 @System [ &vector $2 &pad $6 &r $2 &g $2 &b $2 ]
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|20 @Screen [ &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &color $1 ]
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( variables )
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|0000
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@center [ &x $2 &y $2 ]
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( init )
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|0100 ( -> )
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( theme )
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#530f .System/r DEO2
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#f20f .System/g DEO2
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#ad0f .System/b DEO2
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( find screen center )
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.Screen/width DEI2 #0002 DIV2 .center/x POK2
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.Screen/height DEI2 #0002 DIV2 .center/y POK2
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( draw )
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;draw-background JSR2
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;draw-sprites JSR2
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BRK
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@draw-background ( -- )
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( draw hor line )
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#0000 .Screen/x DEO2 .center/y PEK2 .Screen/y DEO2
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#0000 .Screen/width DEI2 ( from/to )
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&draw-hor
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( draw ) #01 .Screen/color DEO
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( incr ) SWP2 #0002 ADD2 DUP2 .Screen/x DEO2 SWP2
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OVR2 OVR2 LTH2 ,&draw-hor JNZ
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POP2 POP2
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( draw ver line )
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.center/x PEK2 .Screen/x DEO2 #0000 .Screen/y DEO2
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#0000 .Screen/height DEI2 ( from/to )
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&draw-ver
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( draw ) #02 .Screen/color DEO
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( incr ) SWP2 #0002 ADD2 DUP2 .Screen/y DEO2 SWP2
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OVR2 OVR2 LTH2 ,&draw-ver JNZ
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POP2 POP2
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RTN
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@draw-sprites ( -- )
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( draw blending modes )
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;preview_icn .Screen/addr DEO2
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#0010 .Screen/y DEO2
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#00 #08
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&draw-pixel1
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-pixel1 JNZ
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POP POP
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#0018 .Screen/y DEO2
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#00 #08
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&draw-pixel2
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR #08 ADD .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-pixel2 JNZ
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POP POP
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#0020 .Screen/y DEO2
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#00 #08
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&draw-icn1
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR #20 ADD .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-icn1 JNZ
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POP POP
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#0028 .Screen/y DEO2
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#00 #08
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&draw-icn2
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR #28 ADD .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-icn2 JNZ
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POP POP
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#0030 .Screen/y DEO2
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#00 #08
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&draw-chr1
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR #40 ADD .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-chr1 JNZ
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POP POP
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#0038 .Screen/y DEO2
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#00 #08
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&draw-chr2
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( move ) OVR #00 SWP #0008 MUL2 #0010 ADD2 .Screen/x DEO2
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( draw ) OVR #48 ADD .Screen/color DEO
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( incr ) SWP #01 ADD SWP
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DUP2 LTH ,&draw-chr2 JNZ
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POP POP
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RTN
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@preview_icn [ 183c 66db db66 3c18 0000 183c 3c18 0000 ]
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