uxn

commit b327719e38c6fc626db490da00a6c45a55f11531
parent 555d38a8ef7be98f75d859946b56239326947176
Author: Andrew Alderwick <andrew@alderwick.co.uk>
Date:   Sun,  1 Aug 2021 00:31:22 +0100

Reworked putpixel

Diffstat:
M
src/devices/ppu.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/devices/ppu.c b/src/devices/ppu.c
@@ -24,9 +24,9 @@ clear(Ppu *p)
 void
 putpixel(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 color)
 {
-	Uint8 mask = layer ? 0x3 : 0xc, shift = layer * 2;
+	Uint8 *pixel = &p->pixels[y * p->width + x], shift = layer * 2;
 	if(x < p->width && y < p->height)
-		p->pixels[y * p->width + x] = (p->pixels[y * p->width + x] & mask) | (color << shift);
+		*pixel = (*pixel & ~(0x3 << shift)) | (color << shift);
 }
 
 void