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Simplify big-endian CopySprites codepath

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twinaphex
2014-12-09 14:12:31 +01:00
parent 0604e89644
commit 48b22acc96
1 changed files with 4 additions and 13 deletions
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17
src/ppu.c
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@@ -1022,32 +1022,23 @@ static void CopySprites(uint8 *target) {
P[n + 3] = (sprlinebuf + 3)[n];
}
#else
/* TODO: Simplify */
if (!(t & 0x80000000)) {
if (!(t & 0x40000000)) // Normal sprite
P[n] = sprlinebuf[n];
else if (P[n] & 64) // behind bg sprite
if (!(t & 0x40000000) || (P[n] & 64)) // Normal sprite || behind bg sprite
P[n] = sprlinebuf[n];
}
if (!(t & 0x800000)) {
if (!(t & 0x400000)) // Normal sprite
P[n + 1] = (sprlinebuf + 1)[n];
else if (P[n + 1] & 64) // behind bg sprite
if (!(t & 0x400000) || (P[n + 1] & 64)) // Normal sprite || behind bg sprite
P[n + 1] = (sprlinebuf + 1)[n];
}
if (!(t & 0x8000)) {
if (!(t & 0x4000)) // Normal sprite
P[n + 2] = (sprlinebuf + 2)[n];
else if (P[n + 2] & 64) // behind bg sprite
if (!(t & 0x4000) || (P[n + 2] & 64)) // Normal sprite || behind bg sprite
P[n + 2] = (sprlinebuf + 2)[n];
}
if (!(t & 0x80)) {
if (!(t & 0x40)) // Normal sprite
P[n + 3] = (sprlinebuf + 3)[n];
else if (P[n + 3] & 64) // behind bg sprite
if (!(t & 0x40) || (P[n + 3] & 64)) // Normal sprite || behind bg sprite
P[n + 3] = (sprlinebuf + 3)[n];
}
#endif