Added bresenham to noodle

build.sh

@@ -20,5 +20,5 @@ cc -std=c89 -DDEBUG -Wall -Wno-unknown-pragmas -Wpedantic -Wshadow -Wextra -Werr
 # cc uxn.c emulator.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -Wno-unknown-pragmas -L/usr/local/lib -lSDL2 -o bin/emulator
 
 # run
-./bin/assembler projects/examples/gui.shapes.usm bin/boot.rom
+./bin/assembler projects/software/noodle.usm bin/boot.rom
 ./bin/emulator bin/boot.rom

projects/examples/gui.shapes.usm

@@ -8,14 +8,8 @@
 ;label { x 2 y 2 color 1 addr 2 }
 ;pict { x 2 y 2 width 2 height 2 color 1 addr 2 }
 ;rect { x1 2 y1 2 x2 2 y2 2 }
+;line { x 2 y 2 sx 2 sy 2 dx 2 dy 2 e1 2 e2 2 }
 ;color { byte 1 }
-( clean up )
-;a { x 2 y 2 }
-;b { x 2 y 2 }
-;s { x 2 y 2 }
-;d { x 2 y 2 }
-;err { short 2 }
-;err2 { short 2 }
 
 |0100 @RESET
 	
@@ -43,6 +37,32 @@
 	
 BRK
 
+@draw-line ( x1 y1 x2 y2 color )
+	
+	( load ) =color =Sprite.y =Sprite.x =line.y =line.x
+	~Sprite.x ~line.x SUB2 ABS2 =line.dx
+	~Sprite.y ~line.y SUB2 ABS2 #0000 SWP2 SUB2 =line.dy
+	#ffff #00 ~line.x ~Sprite.x LTS2 #0002 MUL2 ADD2 =line.sx 
+	#ffff #00 ~line.y ~Sprite.y LTS2 #0002 MUL2 ADD2 =line.sy 
+	~line.dx ~line.dy ADD2 =line.e1
+	$loop
+		~line.x =Screen.x ~line.y =Screen.y ~color =Screen.color
+		,$end ~line.x ~Sprite.x EQU2 ~line.y ~Sprite.y EQU2 #0101 EQU2 JMP2?
+		~line.e1 #0002 MUL2 =line.e2
+		,$skipy ~line.e2 ~line.dy LTS2 JMP2?
+			~line.e1 ~line.dy ADD2 =line.e1
+			~line.x ~line.sx ADD2 =line.x
+		$skipy
+		,$skipx ~line.e2 ~line.dx GTS2 JMP2?
+			~line.e1 ~line.dx ADD2 =line.e1
+			~line.y ~line.sy ADD2 =line.y
+		$skipx
+		,$loop JMP2
+
+	$end
+
+RTN
+
 @line-rect ( x1 y1 x2 y2 color )
 
 	( load ) =color =rect.y2 =rect.x2 DUP2 =Screen.y =rect.y1 DUP2 =Screen.x =rect.x1
@@ -101,38 +121,6 @@ RTN
 
 RTN
 
-@draw-line ( x1 y1 x2 y2 )
-	
-	=color
-	=b.y =b.x =a.y =a.x
-	~b.x ~a.x SUB2 ABS2 =d.x
-	~b.y ~a.y SUB2 ABS2 #0000 SWP2 SUB2 =d.y
-	#ffff #00 ~a.x ~b.x LTS2 #0002 MUL2 ADD2 =s.x 
-	#ffff #00 ~a.y ~b.y LTS2 #0002 MUL2 ADD2 =s.y 
-	~d.x ~d.y ADD2 =err
-
-	$loop
-
-		~a.x =Screen.x ~a.y =Screen.y ~color =Screen.color
-		,$end ~a.x ~b.x EQU2 ~a.y ~b.y EQU2 #0101 EQU2 JMP2?
-		~err #0002 MUL2 =err2
-
-		,$skipy ~err2 ~d.y LTS2 JMP2?
-			~err ~d.y ADD2 =err
-			~a.x ~s.x ADD2 =a.x
-		$skipy
-
-		,$skipx ~err2 ~d.x GTS2 JMP2?
-			~err ~d.x ADD2 =err
-			~a.y ~s.y ADD2 =a.y
-		$skipx
-
-		,$loop JMP2
-
-	$end
-
-RTN
-
 @pict_small [
 
 	ff80 8080 8080 8088 ffff fffc f8f9 f1f4

projects/software/noodle.usm

@@ -23,6 +23,7 @@
 
 %RTN   { JMP2r }
 %RTN?  { JMP2r? }
+%ABS2 { DUP2 #000f SFT2 #ffff SWP2 SWP POP MUL2? } 
 %++ { #0001 ADD2 } %-- { #0001 SUB2 }
 %2/ { #0001 SFT2 }
 %8/ { #0003 SFT2 } %8* { #0030 SFT2 }
@@ -35,6 +36,7 @@
 ;cursor { x 2 y 2 x0 2 y0 2 size 1 patt 1 drag 1 mirror 1 }
 ;zoom { active 1 x 2 y 2 }
 ;rect { x1 2 y1 2 x2 2 y2 2 }
+;line { x 2 y 2 sx 2 sy 2 dx 2 dy 2 e1 2 e2 2 }
 ;origin { x1 2 y1 2 x2 2 y2 2 }
 ;color { byte 1 }
 ;pt0 { x 2 y 2 }
@@ -125,6 +127,9 @@ BRK
 		,$no-touch-canvas ~Mouse.x CLN2r ~canvas.x1 GTH2 STH2r ~canvas.x2 LTH2 #0101 NEQ2 JMP2?
 		,$no-touch-canvas ~Mouse.y CLN2r ~canvas.y1 GTH2 STH2r ~canvas.y2 LTH2 #0101 NEQ2 JMP2?
 
+			~cursor.x0 ~canvas.x1 SUB2 ~cursor.y0 ~canvas.y1 SUB2 ~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 #01 ,paint-line JSR2
+
+
 			~Mouse.x ~canvas.x1 SUB2 ~Mouse.y ~canvas.y1 SUB2 ,paint JSR2
 
 			,$no-mirror-mode ~cursor.mirror #00 EQU JMP2?
@@ -556,6 +561,32 @@ RTN
 
 ( Generics )
 
+@paint-line ( x1 y1 x2 y2 color )
+	
+	( load ) =color =Sprite.y =Sprite.x =line.y =line.x
+	~Sprite.x ~line.x SUB2 ABS2 =line.dx
+	~Sprite.y ~line.y SUB2 ABS2 #0000 SWP2 SUB2 =line.dy
+	#ffff #00 ~line.x ~Sprite.x LTS2 #0002 MUL2 ADD2 =line.sx 
+	#ffff #00 ~line.y ~Sprite.y LTS2 #0002 MUL2 ADD2 =line.sy 
+	~line.dx ~line.dy ADD2 =line.e1
+	$loop
+		( paint ) ~line.x ~line.y ,add-pixel JSR2
+		,$end ~line.x ~Sprite.x EQU2 ~line.y ~Sprite.y EQU2 #0101 EQU2 JMP2?
+		~line.e1 #0002 MUL2 =line.e2
+		,$skipy ~line.e2 ~line.dy LTS2 JMP2?
+			~line.e1 ~line.dy ADD2 =line.e1
+			~line.x ~line.sx ADD2 =line.x
+		$skipy
+		,$skipx ~line.e2 ~line.dx GTS2 JMP2?
+			~line.e1 ~line.dx ADD2 =line.e1
+			~line.y ~line.sy ADD2 =line.y
+		$skipx
+		,$loop JMP2
+
+	$end
+
+RTN
+
 @line-rect ( x1 y1 x2 y2 color )
 
 	( load ) =color =rect.y2 =rect.x2 DUP2 =Screen.y =rect.y1 DUP2 =Screen.x =rect.x1