Added blending modes to color

README.md

@@ -98,17 +98,15 @@ A device that works like a NES controller, each button is a bit from a single by
 
 ## TODOs
 
-- LDR/STR helpers
 - Line routine
-- On-screen debugger.
 - Getting rid of IOR/IOW would be nice..
-- Sending from the wst to the rst, balance counter?
 
 ### Misc TODOs
 
 - Includes
 - Defines
-- Lint, print unused labels
+- Print unused labels
+- Blending mode
 
 ## Refs
 

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 examples/paint.usm bin/boot.rom
+./bin/assembler examples/devmouse.usm bin/boot.rom
 ./bin/emulator bin/boot.rom

emulator.c

@@ -106,14 +106,13 @@ paintchr(Uint8 *dst, Uint16 x, Uint16 y, Uint8 *sprite)
 }
 
 void
-painticn(Uint8 *dst, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 fg, Uint8 alpha)
+painticn(Uint8 *dst, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 blend)
 {
 	Uint16 v, h;
 	for(v = 0; v < 8; v++)
 		for(h = 0; h < 8; h++) {
 			Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
-			if(!alpha || (alpha && ch1))
-				paintpixel(dst, x + h, y + v, ch1 ? fg : 0);
+			paintpixel(dst, x + h, y + v, ch1 ? blend % 4 : blend / 4);
 		}
 }
 
@@ -357,12 +356,12 @@ spritew(Device *d, Memory *m, Uint8 b)
 		Uint16 x = (d->mem[2] << 8) + d->mem[3];
 		Uint16 y = (d->mem[0] << 8) + d->mem[1];
 		Uint16 a = (d->mem[4] << 8) + d->mem[5];
-		Uint8 clr = d->mem[6] & 0xf;
-		Uint8 layer = d->mem[6] >> 4 & 0xf;
-		if(clr > 7)
-			paintchr(layer ? screen.fg : screen.bg, x, y, &m->dat[a]);
+		Uint8 source = d->mem[6] >> 4 & 0xf;
+		Uint8 *layer = source % 2 ? screen.fg : screen.bg;
+		if(source / 2)
+			paintchr(layer, x, y, &m->dat[a]);
 		else
-			painticn(layer ? screen.fg : screen.bg, x, y, &m->dat[a], clr % 4, clr > 3);
+			painticn(layer, x, y, &m->dat[a], d->mem[6] & 0xf);
 		screen.reqdraw = 1;
 		d->ptr = 0;
 	}

examples/blending.usm

@@ -0,0 +1,46 @@
+( desktop )
+
+:dev/w fff9 ( const write port )
+
+;x1 2 ;y1 2
+
+;x 2 ;y 2 ;color 1
+
+|0100 @RESET 
+	
+	#02 =dev/w 
+
+	#01 =color
+	#00 ,icon #0040 #0040 ,draw-sprite JSR
+	#01 ,icon #0048 #0040 ,draw-sprite JSR
+	#02 ,icon #0050 #0040 ,draw-sprite JSR
+	#03 ,icon #0058 #0040 ,draw-sprite JSR
+	#04 ,icon #0040 #0048 ,draw-sprite JSR
+	#05 ,icon #0048 #0048 ,draw-sprite JSR
+	#06 ,icon #0050 #0048 ,draw-sprite JSR
+	#07 ,icon #0058 #0048 ,draw-sprite JSR
+	#08 ,icon #0040 #0050 ,draw-sprite JSR
+	#09 ,icon #0048 #0050 ,draw-sprite JSR
+	#0a ,icon #0050 #0050 ,draw-sprite JSR
+	#0b ,icon #0058 #0050 ,draw-sprite JSR
+	#0c ,icon #0040 #0058 ,draw-sprite JSR
+	#0d ,icon #0048 #0058 ,draw-sprite JSR
+	#0e ,icon #0050 #0058 ,draw-sprite JSR
+	#0f ,icon #0058 #0058 ,draw-sprite JSR
+
+BRK
+
+@icon [ 3c7e e7c3 c3e7 7e3c ]
+
+@draw-sprite
+	IOW2 ( y byte )
+	IOW2 ( x byte )
+	IOW2 ( sprite address )
+	IOW ( layer-color )
+	RTS
+
+|c000 @FRAME
+|d000 @ERROR 
+
+|FFF0 [ f3f0 f30b f30a ] ( palette )
+|FFFA .RESET .FRAME .ERROR

examples/devconsole.usm

@@ -14,11 +14,12 @@
 BRK
 
 @displaycli
-	
+
 	@cliloop
 		DUP2 LDR IOW                             ( write pointer value to console )
 		#0001 ADD2                               ( increment string pointer )
 		DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2  ( while *ptr!=0 goto loop )
+		
 RTS
 
 @text " Hello World "                     ( add characters to memory )

examples/devctrl.usm

@@ -11,7 +11,7 @@
 	#02 =dev/w ( set dev/write to sprite ) 
 	#0080 =x #0040 =y ( origin )
 
-	#02 ,up_icn ~x ~y ,draw-sprite JSR
+	#12 ,up_icn ~x ~y ,draw-sprite JSR
 
 BRK
 
@@ -38,7 +38,7 @@ BRK
 		~x #0001 ADD2 =x
 	@end
 	( redraw )
-	#03 ~sprite ~x ~y ,draw-sprite JSR
+	#13 ~sprite ~x ~y ,draw-sprite JSR
 
 BRK
 

examples/devmouse.usm

@@ -103,7 +103,7 @@ RTS
 	IOW2 ( y byte )
 	IOW2 ( x byte )
 	IOW2 ( sprite address )
-	#08 IOW ( layer-color )
+	#20 IOW ( layer-color )
 	RTS
 
 @clear_icn   [ 0000 0000 0000 0000 ]

examples/label.usm

@@ -1,61 +1,46 @@
-( hello world )
+( desktop )
 
 :dev/w fff9 ( const write port )
 
+;x1 2 ;y1 2
+
 ;x 2 ;y 2 ;color 1
 
 |0100 @RESET 
-
-	( print to console )
-	,string ,displaycli JSR
-	
-	( print to screen )
-	#0008 =x #0030 =y #01 =color
-	,string ,displaygui JSR 
-	#0010 =x #0038 =y #02 =color
-	,string ,displaygui JSR 
-	#0018 =x #0040 =y #03 =color
-	,string ,displaygui JSR 
 	
+	#02 =dev/w 
 
-BRK
-
-@string " Hello Merveilles "                     ( add string to memory )
+	#01 =color
+	,text #0020 #0030 ,draw-label JSR
+	#02 =color
+	,text #0022 #0038 ,draw-label JSR
+	#03 =color
+	,text #0024 #0040 ,draw-label JSR
+	#04 =color
+	,text #0026 #0048 ,draw-label JSR
+	#06 =color
+	,text #0028 #0050 ,draw-label JSR
+	#07 =color
+	,text #002a #0058 ,draw-label JSR
+	#08 =color
+	,text #002c #0060 ,draw-label JSR
+	#09 =color
+	,text #002e #0068 ,draw-label JSR
 
-@displaycli
-	#00 =dev/w                                   ( set dev/write to console ) 
-	@cliloop
-		DUP2 LDR IOW                             ( write pointer value to console )
-		#0001 ADD2                               ( increment string pointer )
-		DUP2 LDR #00 NEQ ,cliloop ROT JMP? POP2  ( while *ptr!=0 goto loop )
-	RTS
-
-@displaygui
-	#02 =dev/w                                   ( set dev/write to sprite ) 
-	@guiloop
-		DUP2 LDR ,printchar JSR
-		#0001 ADD2
-		~x #0008 ADD2 =x
-		DUP2 LDR #00 NEQ ,guiloop ROT JMP? POP2
-	RTS
-
-@printchar
-	~color ,getchar JSR ~x ~y ,draw-sprite JSR
-	RTS
-
-@getchar
-	#00 SWP #0008 MUL2 ,SPRITESHEET ADD2
-	RTS
+BRK
 
-@draw-sprite
-	IOW2 ( y byte )
-	IOW2 ( x byte )
-	IOW2 ( sprite address )
-	IOW ( layer-color )
-	RTS
+@text " Hello World " ( add string to memory )
 
-|0300 @SPRITESHEET ( first 128 characters of the spectrum-zx font ) 
+@draw-label ( x1 y1 text )
+	=y1 =x1
+	@draw-label-loop
+		( draw ) ~x1 ~y1 IOW2 IOW2 DUP2 LDR #00 SWP #0008 MUL2 ,font ADD2 IOW2 ~color IOW
+		( incr ) #0001 ADD2
+		( incr ) ~x1 #0008 ADD2 =x1
+		DUP2 LDR #00 NEQ ,draw-label-loop ROT JMP? POP2
+RTS
 
+@font ( spectrum-zx font ) 
 [
 	0000 0000 0000 0000 0000 2400 7e3c 0000 0000 2400 3c42 0000 0000 6c7c 7c38 1000
 	0010 387c 7c38 1000 0038 387c 6c10 3800 0010 387c 7c10 3800 0000 0018 1800 0000

examples/shapes.usm

@@ -10,18 +10,18 @@
 	#01 =dev/w ( set dev/write to screen ) 
 
 	#01 =color
-	#0020 #0020 #0060 #0060 ,fill-rect JSR
+	#0010 #0020 #0040 #0060 ,fill-rect JSR
 	#02 =color
-	#0030 #0030 #0070 #0070 ,fill-rect JSR
+	#0020 #0030 #0050 #0070 ,fill-rect JSR
 	#03 =color
-	#0040 #0040 #0080 #0080 ,fill-rect JSR
+	#0030 #0040 #0060 #0080 ,fill-rect JSR
 
 	#01 =color
-	#0090 #0020 #00d0 #0060 ,line-rect JSR
+	#0070 #0020 #00a0 #0060 ,line-rect JSR
 	#02 =color
-	#00a0 #0030 #00e0 #0070 ,line-rect JSR
+	#0080 #0030 #00b0 #0070 ,line-rect JSR
 	#03 =color
-	#00b0 #0040 #00f0 #0080 ,line-rect JSR
+	#0090 #0040 #00c0 #0080 ,line-rect JSR
 	
 BRK
 
@@ -71,5 +71,5 @@ RTS
 
 |c000 @FRAME BRK 
 |d000 @ERROR BRK 
-|FFF0 [ f2ac 35bb 2b5f ] ( palette )
+|FFF0 [ 0f0f 0fff 0ff0 ] ( palette )
 |FFFA .RESET .FRAME .ERROR ( vectors )