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vdp rendering fixes

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This commit is contained in:
kub 2020-03-27 19:25:20 +01:00
parent bd73e6eec0
commit 61114cd8b4
2 changed files with 17 additions and 6 deletions
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12
pico/draw.c
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@ -486,7 +486,10 @@ 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
plane_sh |= PicoMem.vsram[0x26+(~plane_sh&1)] << 16;
// vscroll value for leftmost cells in case of hscroll not on 16px boundary
// XXX it's unclear what exactly the hw is doing. Continue reading where it
// stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&1)] << 16;
DrawStripVSRam(&ts, plane_sh, cellskip);
} else {
vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
@ -1173,7 +1176,10 @@ static void DrawLayerForced(int plane_sh, 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
plane_sh |= PicoMem.vsram[0x26+(~plane_sh&1)] << 16;
// vscroll value for leftmost cells in case of hscroll not on 16px boundary
// XXX it's unclear what exactly the hw is doing. Continue reading where it
// stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&1)] << 16;
DrawStripVSRamForced(&ts, plane_sh, cellskip);
} else {
vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
@ -1191,7 +1197,7 @@ static void DrawSpritesForced(unsigned char *sprited)
{
unsigned (*fTileFunc)(unsigned char *pd, unsigned m, unsigned int pack, int pal);
unsigned char *pd = Pico.est.HighCol;
unsigned char mb[1+320+1];
unsigned char mb[1+320/8+1];
unsigned char *p, *mp;
unsigned m;
int entry, cnt;