FillRect example

build.sh

@@ -24,5 +24,5 @@ rm -f ./bin/emulator
 cc -std=c89 -DDEBUG -Wall -Wno-unknown-pragmas -Wpedantic -Wshadow -Wextra -Werror=implicit-int -Werror=incompatible-pointer-types -Werror=int-conversion -Wvla -g -Og -fsanitize=address -fsanitize=undefined uxn.c emulator.c -L/usr/local/lib -lSDL2 -o bin/emulator
 
 # run
-./bin/assembler examples/pixels.usm bin/boot.rom
+./bin/assembler examples/draw.usm bin/boot.rom
 ./bin/emulator bin/boot.rom

examples/draw.usm

@@ -0,0 +1,79 @@
+( draw routines )
+
+:dev/r fff8 ( std read port )
+:dev/w fff9 ( std write port )
+
+;x_ 2 ;y_ 2
+
+;x 2 ;y 2 ;w 2 ;h 2
+;color 1
+
+|0100 @RESET
+
+	( set dev/write to screen ) 
+	,01 ,dev/w STR 
+
+	( set color 1 )
+	,03 ,color 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
+
+	,redraw JSR
+
+BRK
+
+@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
+
+@fillrect
+	( store shape )
+	,h STR^ ,w STR^ ,y STR^ ,x STR^
+	( set head )
+	,x LDR^ ,x_ STR^ ,y LDR^ ,y_ STR^
+	( paint row )
+	,fillrectrow JSR
+	RTS
+
+@fillrectcol
+	,x_ LDR^ ,y_ LDR^ ,putpixel JSR
+	( incr x )
+	,x_ LDR^ ,0001 ADD^ ,x_ STR^ 
+	( check if greater than w )
+	,x_ LDR^ ,w LDR^ ,x LDR^ ADD^ GTH^ RTS?
+	,fillrectcol JMP
+	RTS
+
+@fillrectrow
+	,x LDR^ ,x_ STR^
+	,fillrectcol JSR
+	( incr x )
+	,y_ LDR^ ,0001 ADD^ ,y_ STR^ 
+	( check if greater than w )
+	,y_ LDR^ ,h LDR^ ,y LDR^ ADD^ GTH^ RTS?
+	,fillrectrow JMP
+	RTS
+
+|c000 @FRAME BRK 
+|d000 @ERROR BRK 
+|FFFA .RESET .FRAME .ERROR