From 555d38a8ef7be98f75d859946b56239326947176 Mon Sep 17 00:00:00 2001 From: Andrew Alderwick Date: Sat, 31 Jul 2021 23:21:13 +0100 Subject: [PATCH] Added more color blending modes for chrs --- src/devices/ppu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/devices/ppu.c b/src/devices/ppu.c index 94cabbf..4024e90 100644 --- a/src/devices/ppu.c +++ b/src/devices/ppu.c @@ -48,7 +48,12 @@ puticn(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint void putchr(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy) { + Uint8 k1 = 1, k2 = 2; Uint16 v, h; + if(!(color & 1)) { + ++color; + k1 = 2, k2 = 1; + } for(v = 0; v < 8; v++) for(h = 0; h < 8; h++) { Uint8 ch1 = ((sprite[v] >> (7 - h)) & 0x1) * color; @@ -57,7 +62,7 @@ putchr(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint layer, x + (flipx ? 7 - h : h), y + (flipy ? 7 - v : v), - ((ch1 + ch2 * 2) + color / 4) & 0x3); + ((ch1 * k1 + ch2 * k2) + color / 4) & 0x3); } }