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uxn/examples/draw.usm

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( draw routines )
:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )
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;x_ 2 ;y_ 2 ;x 2 ;y 2 ;w 2 ;h 2 ;color 1
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|0100 @RESET
( set dev/write to screen )
,01 ,dev/w STR
,01 ,color STR
( fill rect x y w h )
,0020 ,0020 ,0060 ,0040 ,fillrect JSR
,02 ,color STR
( fill rect x y w h )
,0030 ,0030 ,0040 ,0060 ,fillrect JSR
,03 ,color STR
( fill rect x y w h )
,0040 ,0040 ,0060 ,0040 ,fillrect JSR
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,01 ,color STR
( fill rect x y w h )
,00a0 ,0010 ,0020 ,0020 ,fillrect JSR
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,02 ,color STR
( fill rect x y w h )
,00b0 ,0040 ,0020 ,0020 ,linerect JSR
,03 ,color STR
( fill rect x y w h )
,0058 ,0028 ,0050 ,0050 ,linerect JSR
,01 ,color STR
( fill rect x y w h )
,0028 ,0038 ,0050 ,0030 ,linerect JSR
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,redraw JSR
BRK
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@fillrect
,h STR^ ,w STR^ ,y STR^ ,x STR^
,x LDR^ ,x_ STR^ ,y LDR^ ,y_ STR^
@fillrectrow
,x LDR^ ,x_ STR^
@fillrectcol
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( draw ) ,x_ LDR^ ,y_ LDR^ ,putpixel JSR
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,x_ LDR^ ,0001 ADD^ ,x_ STR^
,x_ LDR^ ,w LDR^ ,x LDR^ ADD^ LTH^ ,fillrectcol ROT JMP? POP^
,y_ LDR^ ,0001 ADD^ ,y_ STR^
,y_ LDR^ ,h LDR^ ,y LDR^ ADD^ LTH^ ,fillrectrow ROT JMP? POP^
RTS
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@linerect
,h STR^ ,w STR^ ,y STR^ ,x STR^
,x LDR^ ,x_ STR^ ,y LDR^ ,y_ STR^
@linerectcol
( draw ) ,x LDR^ ,y_ LDR^ ,putpixel JSR
( draw ) ,x LDR^ ,w LDR^ ADD^ ,y_ LDR^ ,putpixel JSR
,y_ LDR^ ,0001 ADD^ ,y_ STR^
,y_ LDR^ ,h LDR^ ,y LDR^ ADD^ LTH^ ,linerectcol ROT JMP? POP^
@linerectrow
( draw ) ,x_ LDR^ ,y LDR^ ,putpixel JSR
( draw ) ,x_ LDR^ ,y LDR^ ,h LDR^ ADD^ ,putpixel JSR
,x_ LDR^ ,0001 ADD^ ,x_ STR^
,x_ LDR^ ,w LDR^ ,x LDR^ ADD^ ,0001 ADD^ LTH^ ,linerectrow ROT JMP? POP^
RTS
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@redraw
,0000 IOW^
,0000 IOW^
,00 IOW
,01 IOW
RTS
@putpixel
IOW^ ( y short )
IOW^ ( x short )
,color LDR IOW ( color byte )
,00 IOW ( redraw byte )
RTS
|c000 @FRAME BRK
|d000 @ERROR BRK
|FFFA .RESET .FRAME .ERROR