From: kub <derkub@gmail.com>
Date: Tue, 9 Nov 2021 22:33:45 +0000 (+0100)
Subject: sms renderer, fix unaligned bg-filled tiles
X-Git-Tag: v2.00~425
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d05e2eb3d639c3974c25d90a1bbf636726710d68;p=picodrive.git

sms renderer, fix unaligned bg-filled tiles
---

diff --git a/pico/mode4.c b/pico/mode4.c
index 3827875d..54440e38 100644
--- a/pico/mode4.c
+++ b/pico/mode4.c
@@ -60,8 +60,14 @@ static int CollisionDetect(u8 *mb, u16 sx, unsigned int pack, int zoomed)
 
 static void TileBGM4(u16 sx, int pal)
 {
-  u32 *pd = (u32 *)(Pico.est.HighCol + sx);
-  pd[0] = pd[1] = pal * 0x01010101;
+  if (sx & 3) {
+    u8 *pd = (u8 *)(Pico.est.HighCol + sx);
+    pd[0] = pd[1] = pd[2] = pd[3] = pal;
+    pd[4] = pd[5] = pd[6] = pd[7] = pal;
+  } else {
+    u32 *pd = (u32 *)(Pico.est.HighCol + sx);
+    pd[0] = pd[1] = pal * 0x01010101;
+  }
 }
 
 // 8 pixels are arranged in 4 bitplane bytes in a 32 bit word. To pull the