atari:xbios: On ST,STE, C2P routine has 4 bits planes as destination,…

… calculate correct width
libsdl-org · Jan 12, 2019 · 43c5417 · 43c5417
1 parent f7599fb
commit 43c5417
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/video/xbios/SDL_xbios_st.c b/src/video/xbios/SDL_xbios_st.c
@@ -158,6 +158,10 @@ static void getScreenFormat(_THIS, int bpp, Uint32 *rmask, Uint32 *gmask, Uint32
 
 static int getLineWidth(_THIS, xbiosmode_t *new_video_mode, int width, int bpp)
 {
+	if (bpp==4) {
+		return (width >> 1);
+	}
+
 	return (width * (((bpp==15) ? 16 : bpp)>>3));
 }