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wip initial draft

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This commit is contained in:
Jaklyy
2023-12-08 21:27:44 -05:00
parent 082310d5d5
commit 8e2c9cbff6
4 changed files with 90 additions and 16 deletions
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47
src/GPU3D.cpp
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@ -221,6 +221,12 @@ void GPU3D::Reset() noexcept
DispCnt = 0;
AlphaRefVal = 0;
AlphaRef = 0;
RDLines = 46;
RDLinesMin = 46;
RasterTimingCounterPrev = 0;
RasterTimingCounterOdd = 0;
RasterTimingCounterEven = 0;
memset(ToonTable, 0, sizeof(ToonTable));
memset(EdgeTable, 0, sizeof(EdgeTable));
@ -770,7 +776,40 @@ void GPU3D::StallPolygonPipeline(s32 delay, s32 nonstalldelay) noexcept
}
}
bool GPU3D::DoTimings(s32 cycles, bool odd)
{
if (odd)
{
RasterTimingCounterOdd += cycles;
if ((RasterTimingCounterOdd + RasterTimingCounterPrev) < RasterTimingCap) return 0;
}
else
{
RasterTimingCounterEven += cycles;
if ((RasterTimingCounterEven + RasterTimingCounterPrev) < RasterTimingCap) return 0;
}
DispCnt |= (1<<12);
return 1;
}
void GPU3D::EndScanline(bool odd)
{
if (!odd)
{
RasterTimingCounterPrev += std::max(RasterTimingCounterOdd, RasterTimingCounterEven);
RasterTimingCounterPrev -= PerScanlineRecup; // wip
if (RasterTimingCounterPrev < 0) RasterTimingCounterPrev = 0;
// calc is wrong, seems to round up...?
RDLines = (RasterTimingCap - RasterTimingCounterPrev) / PerScanlineTiming;
// seems to display the lowest scanline buffer count reached during the current frame.
// we also caps it to 46 here, because this reg does that too for some reason.
if (RDLines > RDLinesMin) RDLines = RDLinesMin;
if (RDLines < RDLinesMin) RDLinesMin = RDLines;
RasterTimingCounterOdd = 0;
RasterTimingCounterEven = 0;
}
}
template<int comp, s32 plane, bool attribs>
void ClipSegment(Vertex* outbuf, Vertex* vin, Vertex* vout)
@ -2369,6 +2408,10 @@ void GPU3D::CheckFIFODMA() noexcept
void GPU3D::VCount144() noexcept
{
RDLinesMin = 46;
RasterTimingCounterPrev = 0;
RasterTimingCounterOdd = 0;
RasterTimingCounterEven = 0;
CurrentRenderer->VCount144();
}
@ -2612,7 +2655,7 @@ u16 GPU3D::Read16(u32 addr) noexcept
return DispCnt;
case 0x04000320:
return 46; // TODO, eventually
return RDLines; // IT IS TIME
case 0x04000600:
{
@ -2656,7 +2699,7 @@ u32 GPU3D::Read32(u32 addr) noexcept
return DispCnt;
case 0x04000320:
return 46; // TODO, eventually
return RDLines; // IT IS TIME
case 0x04000600:
{