uxn

commit 79949be735a13e6b1cfb80a1c8d517e84be48d4a
parent f2509f13f4568d61d4f83f4d45e281bb42b6e6c8
Author: neauoire <aliceffekt@gmail.com>
Date:   Fri,  9 Apr 2021 08:02:55 -0700

Minor cleanup

Diffstat:
M
src/emulator.c
 | 
17
+++++------------
M
src/ppu.c
 | 
15
++++++++++++++-
M
src/ppu.h
 | 
9
++++-----

3 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/src/emulator.c b/src/emulator.c
@@ -215,7 +215,8 @@ screen_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
 	if(b0 == 0x0c) {
 		Uint16 x = (m[ptr] << 8) + m[ptr + 1];
 		Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
-		putpixel(&ppu, b1 >> 4 & 0xf ? ppu.fg : ppu.bg, x, y, b1 & 0xf);
+		Uint8 *layer = b1 >> 4 & 0xf ? ppu.fg : ppu.bg;
+		putpixel(&ppu, layer, x, y, b1 & 0xf);
 		reqdraw = 1;
 	}
 	return b1;
@@ -227,19 +228,11 @@ sprite_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
 	Uint8 *m = u->ram.dat;
 	ptr += 8;
 	if(b0 == 0x0e) {
-		Uint16 v, h;
 		Uint16 x = (m[ptr] << 8) + m[ptr + 1];
 		Uint16 y = (m[ptr + 2] << 8) + m[ptr + 3];
-		Uint8 blend = b1 & 0xf;
-		Uint8 *layer = ((b1 >> 4) & 0xf) % 2 ? ppu.fg : ppu.bg;
+		Uint8 *layer = (b1 >> 4) & 0xf ? ppu.fg : ppu.bg;
 		Uint8 *sprite = &m[(m[ptr + 4] << 8) + m[ptr + 5]];
-		for(v = 0; v < 8; v++)
-			for(h = 0; h < 8; h++) {
-				Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
-				if(ch1 == 0 && (blend == 0x05 || blend == 0x0a || blend == 0x0f))
-					continue;
-				putpixel(&ppu, layer, x + h, y + v, ch1 ? blend % 4 : blend / 4);
-			}
+		putsprite(&ppu, layer, x, y, sprite, b1 & 0xf);
 		reqdraw = 1;
 	}
 	return b1;
@@ -325,7 +318,7 @@ system_poke(Uxn *u, Uint16 ptr, Uint8 b0, Uint8 b1)
 {
 	Uint8 *m = u->ram.dat;
 	m[PAGE_DEVICE + b0] = b1;
-	loadtheme(&ppu, &m[PAGE_DEVICE + 0x0008]);
+	getcolors(&ppu, &m[PAGE_DEVICE + 0x0008]);
 	reqdraw = 1;
 	(void)ptr;
 	return b1;
diff --git a/src/ppu.c b/src/ppu.c
@@ -110,7 +110,20 @@ putpixel(Ppu *p, Uint8 *layer, Uint16 x, Uint16 y, Uint8 color)
 }
 
 void
-loadtheme(Ppu *p, Uint8 *addr)
+putsprite(Ppu *p, Uint8 *layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color)
+{
+	Uint16 v, h;
+	for(v = 0; v < 8; v++)
+		for(h = 0; h < 8; h++) {
+			Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1);
+			if(ch1 == 0 && (color == 0x05 || color == 0x0a || color == 0x0f))
+				continue;
+			putpixel(p, layer, x + h, y + v, ch1 ? color % 4 : color / 4);
+		}
+}
+
+void
+getcolors(Ppu *p, Uint8 *addr)
 {
 	int i;
 	for(i = 0; i < 4; ++i) {
diff --git a/src/ppu.h b/src/ppu.h
@@ -13,9 +13,7 @@ WITH REGARD TO THIS SOFTWARE.
 */
 
 typedef unsigned char Uint8;
-typedef signed char Sint8;
 typedef unsigned short Uint16;
-typedef signed short Sint16;
 typedef unsigned int Uint32;
 
 typedef struct Ppu {
@@ -27,5 +25,6 @@ typedef struct Ppu {
 int initppu(Ppu *p, Uint8 hor, Uint8 ver, Uint8 pad);
 void drawppu(Ppu *p);
 void drawdebugger(Ppu *p, Uint8 *stack, Uint8 ptr);
-void loadtheme(Ppu *p, Uint8 *addr);
-void putpixel(Ppu *p, Uint8 *layer, Uint16 x, Uint16 y, Uint8 color);
-\ No newline at end of file
+void getcolors(Ppu *p, Uint8 *addr);
+void putpixel(Ppu *p, Uint8 *layer, Uint16 x, Uint16 y, Uint8 color);
+void putsprite(Ppu *p, Uint8 *layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color);
+\ No newline at end of file