uxn

commit 28aaf40e6db9909f76cada6edc43295cdd024b8f
parent ca5675419efd9d8ee98d54c0e211e5cde64eeea0
Author: Sigrid Solveig Haflínudóttir <ftrvxmtrx@gmail.com>
Date:   Tue,  2 Nov 2021 18:18:30 +0100

ppu_write: put new byte value only if it's different

Diffstat:
M
src/devices/ppu.c
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/devices/ppu.c b/src/devices/ppu.c
@@ -61,9 +61,10 @@ ppu_write(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 color)
 		Uint8 pix = p->pixels[row];
 		Uint8 mask = ~(0x3 << shift);
 		Uint8 pixnew = (pix & mask) + (color << shift);
-		p->pixels[row] = pixnew;
-		if(pix != pixnew)
+		if(pix != pixnew){
+			p->pixels[row] = pixnew;
 			p->reqdraw = 1;
+		}
 	}
 }