RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

core vdp, avoid rendering if no changes to RAMs/registers

Browse source 
mainly benefits 32X in faster/fastest rendering mode, 0-5% saved
This commit is contained in:
kub 2023-04-27 22:18:55 +02:00
parent 0c9c8e4796
commit f9ed944604
6 changed files with 48 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

18
pico/draw.c
View file

@ -1910,6 +1910,7 @@ PICO_INTERNAL void PicoFrameStart(void)
int loffs = 8, lines = 224, coffs = 0, columns = 320;
int sprep = est->rendstatus & PDRAW_DIRTY_SPRITES;
int skipped = est->rendstatus & PDRAW_SKIP_FRAME;
int sync = est->rendstatus & (PDRAW_SYNC_NEEDED | PDRAW_SYNC_NEXT);
// prepare to do this frame
est->rendstatus = 0;
@ -1935,7 +1936,12 @@ PICO_INTERNAL void PicoFrameStart(void)
// mode_change() might reset rendstatus_old by calling SetColorFormat
emu_video_mode_change(loffs, lines, coffs, columns);
rendstatus_old = est->rendstatus & (PDRAW_INTERLACE|PDRAW_32_COLS|PDRAW_30_ROWS);
// mode_change() might clear buffers, redraw needed
est->rendstatus |= PDRAW_SYNC_NEEDED;
}
if (sync | skipped)
est->rendstatus |= PDRAW_SYNC_NEEDED;
if (PicoIn.skipFrame) // preserve this until something is rendered at last
est->rendstatus |= PDRAW_SKIP_FRAME;
if (sprep | skipped)
@ -2030,6 +2036,14 @@ void PicoDrawSync(int to, int blank_last_line, int limit_sprites)
if (est->DrawScanline <= to &&
(est->rendstatus & (PDRAW_DIRTY_SPRITES|PDRAW_PARSE_SPRITES)))
ParseSprites(to + 1, limit_sprites);
else if (!(est->rendstatus & PDRAW_SYNC_NEEDED)) {
// nothing has changed in VDP/VRAM and buffer is the same -> no sync needed
int count = to+1 - est->DrawScanline;
est->HighCol += count*HighColIncrement;
est->DrawLineDest = (char *)est->DrawLineDest + count*DrawLineDestIncrement;
est->DrawScanline = to+1;
return;
}
for (line = est->DrawScanline; line < to; line++)
PicoLine(line, offs, sh, bgc);
@ -2135,6 +2149,8 @@ void PicoDrawSetOutBufMD(void *dest, int increment)
PicoDrawSetInternalBuf(dest, increment); // needed for SMS
PicoDraw2SetOutBuf(dest, increment);
} else if (dest != NULL) {
if (dest != DrawLineDestBase)
Pico.est.rendstatus |= PDRAW_SYNC_NEEDED;
DrawLineDestBase = dest;
DrawLineDestIncrement = increment;
Pico.est.DrawLineDest = (char *)DrawLineDestBase + Pico.est.DrawScanline * increment;
@ -2157,6 +2173,8 @@ void PicoDrawSetOutBuf(void *dest, int increment)
void PicoDrawSetInternalBuf(void *dest, int increment)
{
if (dest != NULL) {
if (dest != HighColBase)
Pico.est.rendstatus |= PDRAW_SYNC_NEEDED;
HighColBase = dest;
HighColIncrement = increment;
Pico.est.HighCol = HighColBase + Pico.est.DrawScanline * increment;