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sms, add vdp midframe cram change handling for 8bit renderer

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This commit is contained in:
kub 2021-10-17 22:50:07 +02:00
parent e4da4fe8b9
commit 646be42e9d
2 changed files with 43 additions and 22 deletions
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15
pico/draw.c
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@ -1688,13 +1688,13 @@ void FinalizeLine8bit(int sh, int line, struct PicoEState *est)
int len;
static int dirty_line;
// a hack for mid-frame palette changes
if (Pico.m.dirtyPal == 1)
{
// a hack for mid-frame palette changes
if (!(est->rendstatus & PDRAW_SONIC_MODE) | (line - dirty_line > 4)) {
// store a maximum of 3 additional palettes in SonicPal
if (est->SonicPalCount < 3)
est->SonicPalCount ++;
// store a maximum of 2 additional palettes in SonicPal
if (est->SonicPalCount < 2 &&
(!(est->rendstatus & PDRAW_SONIC_MODE) || (line - dirty_line > 4))) {
est->SonicPalCount ++;
dirty_line = line;
est->rendstatus |= PDRAW_SONIC_MODE;
}
@ -1854,7 +1854,6 @@ static int DrawDisplay(int sh)
PICO_INTERNAL void PicoFrameStart(void)
{
int loffs = 8, lines = 224, coffs = 0, columns = 320;
int dirty = ((Pico.est.rendstatus & PDRAW_SONIC_MODE) || Pico.m.dirtyPal);
int sprep = Pico.est.rendstatus & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
int skipped = Pico.est.rendstatus & PDRAW_SKIP_FRAME;
@ -1896,7 +1895,7 @@ PICO_INTERNAL void PicoFrameStart(void)
if (FinalizeLine == FinalizeLine8bit) {
// make a backup of the current palette in case Sonic mode is detected later
Pico.est.SonicPalCount = 0;
Pico.m.dirtyPal = (dirty ? 2 : 0); // mark as dirty but already copied
Pico.m.dirtyPal = (Pico.m.dirtyPal ? 2 : 0); // mark as dirty but copied
blockcpy(Pico.est.SonicPal, PicoMem.cram, 0x40*2);
}
}
@ -2011,6 +2010,8 @@ void PicoDrawUpdateHighPal(void)
blockcpy(est->HighPal+0x40, est->HighPal, 0x40*2);
blockcpy(est->HighPal+0x80, est->HighPal, 0x80*2);
}
Pico.est.HighPal[0xe0] = 0x0000; // black and white, reserved for OSD
Pico.est.HighPal[0xf0] = 0xffff;
}
}