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(WIP) Further updates from WinUAE

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This commit is contained in:
Dimitris Panokostas 2019-01-26 22:48:59 +01:00
parent f78994df5e
commit cb80696aa6
6 changed files with 579 additions and 342 deletions
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17
src/blitter.cpp
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@ -372,6 +372,7 @@ static void blitter_done (int hpos)
blitter_done_notify (hpos);
event2_remevent (ev2_blitter);
unset_special (SPCFLAG_BLTNASTY);
blitter_dangerous_bpl = 0;
}
STATIC_INLINE void chipmem_agnus_wput2 (uaecptr addr, uae_u32 w)
@ -1133,6 +1134,22 @@ void maybe_blit2 (int hack)
blitter_handler (0);
}
void check_is_blit_dangerous(uaecptr *bplpt, int planes, int words)
{
blitter_dangerous_bpl = 0;
if (bltstate == BLT_done || !blitter_cycle_exact)
return;
// too simple but better than nothing
for (int i = 0; i < planes; i++) {
uaecptr bpl = bplpt[i];
uaecptr dpt = bltdpt & chipmem_bank.mask;
if (dpt >= bpl - 2 * words && dpt < bpl + 2 * words) {
blitter_dangerous_bpl = 1;
return;
}
}
}
int blitnasty (void)
{
int cycles, ccnt;