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vdp rendering fixes

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This commit is contained in:
kub 2020-02-16 13:48:51 +01:00
parent 8dc138a099
commit 29d99d6bb8
3 changed files with 23 additions and 14 deletions
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20
pico/draw.c
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@ -339,12 +339,13 @@ static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
oldcode = code;
// Get tile address/2:
addr=(code&0x7ff)<<4;
if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
}
pack = *(unsigned int *)(PicoMem.vram + addr);
if (code & 0x1000) ty ^= 0xe; // Y-flip
pack = *(unsigned int *)(PicoMem.vram + addr+ty);
if (!pack) {
blank = code;
continue;
@ -394,7 +395,7 @@ void DrawStripInterlace(struct TileStrip *ts)
if (code!=oldcode) {
oldcode = code;
// Get tile address/2:
addr=(code&0x7ff)<<5;
addr=(code&0x3ff)<<5;
if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip
// pal=Pico.cram+((code>>9)&0x30);
@ -449,8 +450,11 @@ static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells,
else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
htab=pvid->reg[13]<<9; // Horizontal scroll table address
if ( pvid->reg[11]&2) htab+=est->DrawScanline<<1; // Offset by line
if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
switch (pvid->reg[11]&3) {
case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
case 3: htab += (est->DrawScanline<<1); break; // Offset by line
}
htab+=plane_sh&1; // A or B
// Get horizontal scroll value, will be masked later
@ -626,9 +630,9 @@ static void DrawTilesFromCache(int *hc, int sh, int rlim, struct PicoEState *est
if (!sh)
{
short blank=-1; // The tile we know is blank
int blank=-1; // The tile we know is blank
while ((code=*hc++)) {
if (!(code & 0x8000) || (short)code == blank)
if (!(code & 0x8000) || (unsigned short)code == blank)
continue;
// Get tile address/2:
addr = (code & 0x7ff) << 4;
@ -636,7 +640,7 @@ static void DrawTilesFromCache(int *hc, int sh, int rlim, struct PicoEState *est
pack = *(unsigned int *)(PicoMem.vram + addr);
if (!pack) {
blank = (short)code;
blank = (unsigned short)code;
continue;
}