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vdp rendering improvements

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This commit is contained in:
kub
2020-03-14 19:14:04 +01:00
parent bef6e53491
commit c2af49368c
1 changed files with 7 additions and 8 deletions
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15
pico/draw.c
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@@ -324,7 +324,7 @@ static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
//if((cell&1)==0)
{
int line,vscroll;
vscroll=PicoMem.vsram[(plane_sh&1)+(cell&~1)];
vscroll=PicoMem.vsram[(plane_sh&1)+(cell&0x3e)];
// Find the line in the name table
line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
@@ -479,6 +479,7 @@ static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells,
// shit, we have 2-cell column based vscroll
// luckily this doesn't happen too often
ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
PicoMem.vsram[(plane_sh & 1)+0x3e] = PicoMem.vsram[0x27]; // XXX really?
DrawStripVSRam(&ts, plane_sh, cellskip);
} else {
vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
@@ -1022,7 +1023,7 @@ static void DrawSpritesHiAS(unsigned char *sprited, int sh)
if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
mp = mb+(sx>>3);
for (m = *mp << 8; width; width--, sx+=8, *mp++ = m, tile+=delta)
for (m = *mp; width; width--, sx+=8, *mp++ = m, m >>= 8, tile+=delta)
{
unsigned int pack;
@@ -1031,11 +1032,11 @@ static void DrawSpritesHiAS(unsigned char *sprited, int sh)
pack = *(unsigned int *)(PicoMem.vram + (tile & 0x7fff));
m = (m >> 8) | mp[1] << 8; // next mask byte
m |= mp[1] << 8; // next mask byte
// shift mask bits to bits 8-15 for easier load/store handling
m = fTileFunc(pd + sx, m << (8-(sx&0x7)), pack, pal) >> (8-(sx&0x7));
}
*mp = m >> 8; // write last mask byte
*mp = m; // write last mask byte
}
}
@@ -1428,10 +1429,6 @@ static int DrawDisplay(int sh)
int win=0, edge=0, hvwind=0, lflags;
int maxw, maxcells;
if (!(est->DrawScanline & 15) ||
(est->rendstatus & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES)))
PrepareSprites((est->DrawScanline+16) & ~15);
est->rendstatus &= ~(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
est->rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO);
@@ -1646,6 +1643,8 @@ void PicoDrawSync(int to, int blank_last_line)
if (to > 223)
to = 223;
}
if (Pico.est.DrawScanline <= to - blank_last_line)
PrepareSprites(to - blank_last_line + 1);
for (line = Pico.est.DrawScanline; line < to; line++)
PicoLine(line, offs, sh, bgc);