IIgs nibble swap working.

joeylib/build-PC.sh

@@ -6,6 +6,7 @@ SRC="${JOEY}/joeylib/joeylib/src"
 
 
 function doBuild() {
+	echo "*** Starting ${DIST}"
 	if [ -d "${BUILD}" ]; then
 		rm -rf "${BUILD}"
 	fi

joeylib/src/jIIgs.asm

 ;----------------------------------------
 ;  JoeyLib
-;  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+;  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
 ;
 ;  This software is provided 'as-is', without any express or implied
 ;  warranty.  In no event will the authors be held liable for any damages
@@ -370,6 +370,61 @@ gotpdl0	xba		; 3c
 	jreturn 2:pret0
 	end
 
+;----------------------------------------
+; Swaps nibble values
+;
+; Psychotically commented to help learn ASM  :-)
+;----------------------------------------
+asmNSwap	start
+
+hnibo	equ	1	; High nibble old color value
+hnibn	equ	2	; High nibble new color value
+
+	jsubroutine (4:P,2:C,2:O,2:N),2
+
+	short m		; Use 8 bit accumulator
+	lda	N	; Load new color to use
+	asl	a	; Shift it up a nibble
+	asl	a
+	asl	a
+	asl	a
+	sta	hnibn	; Store it for later
+	lda	O	; Load old color to use (16 bit argument)
+	asl	a	; Shift it up a nibble
+	asl	a
+	asl	a
+	asl	a
+	sta	hnibo	; Store it for later
+
+	ldy	#0	; Load Y (our counter) with 0
+
+NSLow	lda	[P],y	; Get byte to check
+	and	#$0F	; Isolate low nibble
+	cmp	O	; Compare to old value
+	bne	NSHigh	; Not equal, skip to high nibble
+	lda	[P],y	; Get byte to modify
+	and	#$F0	; Clear low nibble
+	ora	N	; Set low nibble to new color
+	sta	[P],y	; Store it back
+
+NSHigh	lda	[P],y	; Get byte to check
+	and	#$F0	; Isolate high nibble
+	cmp	hnibo	; Compare to old color
+	bne	NSEnd	; Not equal, skip to next byte
+	lda	[P],y	; Get byte to modify
+	and	#$0F	; Clear high nibble
+	ora	hnibn	; Set high nibble to new color
+	sta	[P],y	; Store it back
+
+NSEnd	iny		; Increment Y
+	clc		; Clear carry
+	cpy	C	; Compare Y to number of bytes to modify
+	bcc	NSLow	; Keep going
+
+	long m		; Back to 16 bit accumulator
+	jreturn
+	end
+
 ;----------------------------------------
 ; Plots a point in a given color
 ;

joeylib/src/jIIgs.c

 /*
  *  JoeyLib
- *  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+ *  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
  *
  *  This software is provided 'as-is', without any express or implied
  *  warranty.  In no event will the authors be held liable for any damages

joeylib/src/jIIgs.macro

 ;----------------------------------------
 ;  JoeyLib
-;  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+;  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
 ;
 ;  This software is provided 'as-is', without any express or implied
 ;  warranty.  In no event will the authors be held liable for any damages
@@ -26,7 +26,6 @@
 	MACRO
 &lab	jsubroutine &parms,&work
 &lab	anop
-	using	savedDBR	; ADDED
 	aif	c:&work,.a
 	lclc	&work
 &work	setc	0

joeylib/src/jPC.c

 /*
  *  JoeyLib
- *  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+ *  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
  *
  *  This software is provided 'as-is', without any express or implied
  *  warranty.  In no event will the authors be held liable for any damages
@@ -460,6 +460,17 @@ bool jlUtilMustExit(void) {
 }
 
 
+void jlUtilNibbleSwap(byte *mem, jint16 count, byte old, byte new) {
+	int x;
+	jlPixelPairT *b;
+	for (x=0; x<count; x++) {
+		b = (jlPixelPairT *)&mem[x];
+		if (b->l == old) b->l = new;
+		if (b->r == old) b->r = new;
+	}
+}
+
+
 void jlUtilShutdown(void) {
 	int x;
 

joeylib/src/joey.c

 /*
  *  JoeyLib
- *  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+ *  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
  *
  *  This software is provided 'as-is', without any express or implied
  *  warranty.  In no event will the authors be held liable for any damages

joeylib/src/joey.h

 /*
  *  JoeyLib
- *  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+ *  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
  *
  *  This software is provided 'as-is', without any express or implied
  *  warranty.  In no event will the authors be held liable for any damages
@@ -255,6 +255,7 @@ void          jlUtilIdle(void);
 #define       jlUtilIsOdd(x) (((x & 1) == 1) ? true : false)
 char         *jlUtilMakePathname(char *filename, char *extension);
 bool          jlUtilMustExit(void);
+void          jlUtilNibbleSwap(byte *mem, jint16 count, byte old, byte new);
 void          jlUtilShutdown(void) __attribute__((noreturn));
 #define       jlUtilStackPop(stack) _jlUtilStackPop((jlStackT **)&(stack))  // Syntatic Sugar
 void        *_jlUtilStackPop(jlStackT **stack);
@@ -276,12 +277,14 @@ extern void     asmB88(byte *p, jint16 cx1, jint16 cy1, jint16 cx2, jint16 cy2);
 extern void     asmPoint(jint16 color, jint16 x, jint16 y);
 extern jint16   asmGetPoint(jint16 x, jint16 y);
 extern juint16  asmGetVbl(void);
+extern void     asmNSwap(byte *mem, jint16 count, jint16 old, jint16 new);
 
 // Inlined functions
-#define jlDrawBlit8x8(sta, cx1, cy1, cx2, cy2)    asmB88((byte *)sta->pixels, cx1, cy1, cx2, cy2);
-#define jlDrawGetPixel(x, y) asmGetPoint(x, y)
-#define jlDrawPoint(x, y)    asmPoint(_jlDrawColorNibbles, x, y)
-#define jlUtilTimer          asmGetVbl
+#define jlDrawBlit8x8(sta, cx1, cy1, cx2, cy2)    asmB88((byte *)sta->pixels, cx1, cy1, cx2, cy2)
+#define jlDrawGetPixel(x, y)                      asmGetPoint(x, y)
+#define jlDrawPoint(x, y)                         asmPoint(_jlDrawColorNibbles, x, y)
+#define jlUtilNibbleSwap(mem, count, old, new)    asmNSwap(mem, count, (jint16)old, (jint16)new)
+#define jlUtilTimer                               asmGetVbl
 
 #ifdef JOEY_DEBUG
 void _jlDebugBorder(jlBorderColorsE color);

joeylib/src/test.c

 /*
  *  JoeyLib
- *  Copyright (C) 2018 Scott Duensing <scott@kangaroopunch.com>
+ *  Copyright (C) 2018-2019 Scott Duensing <scott@kangaroopunch.com>
  *
  *  This software is provided 'as-is', without any express or implied
  *  warranty.  In no event will the authors be held liable for any damages
@@ -59,29 +59,36 @@ int main(void) {
 	jlStaT *kanga = NULL;
 	jlStaT *font  = NULL;
 	jint16 y;
+	jint16 color      = 15;
+	jint16 nextColor  = 1;
 
 	jlUtilStartup("JoeyLib Test");
 
-	jlStaLoad(kanga, "kanga");
-	jlStaLoad(font, "font");
+	if (!jlStaLoad(kanga, "kanga")) jlUtilDie("Unable to load kanga.sta!");
+	if (!jlStaLoad(font, "font")) jlUtilDie("Unable to load font.sta!");
 
 	jlStaDisplay(kanga);
 	jlDrawColor(1);
 	jlDrawBox(0, 0, 319, 199);
 
-	jlSoundMusicPlay("music");
+	//jlSoundMusicPlay("music");
 
 	jlPaletteSet(15, 15, 15, 15);
+	printAt(font, 1, 16, "X");
 	while (!jlKeyPressed()) {
 		y = 17;
 		printAt(font, 1, y++, "X = %d   ", jlGameGetAxis(0));
 		printAt(font, 1, y++, "Y = %d   ", jlGameGetAxis(1));
 		printAt(font, 1, y++, "T = %d   ", jlUtilTimer());
 		jlDisplayPresent();
+		jlUtilNibbleSwap((byte *)font->pixels, 32000, (byte)(color), (byte)(nextColor));
+		color = nextColor;
+		nextColor++;
+		if (nextColor > 15) nextColor = 1;
 	}
 	jlKeyRead();
 
-	jlSoundMusicStop();
+	//jlSoundMusicStop();
 
 	jlStaFree(font);
 	jlStaFree(kanga);