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clean up

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This commit is contained in:
Jaklyy 2024-04-23 22:05:45 -04:00
parent 1aa86967b5
commit 896df08c5c
2 changed files with 24 additions and 95 deletions
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32
src/GPU3D.h
View File

@ -350,14 +350,7 @@ public:
static constexpr int ScanlineReadInc = DelayBetweenReads + ScanlineReadSpeed;
static constexpr int InitGPU2DTimeout = 51875 * TimingFrac; // 51618? 51874? 52128? | when it finishes reading the first scanline.
static constexpr int FrameLength = ScanlineReadInc * 263; // how long the entire frame is. TODO: Verify if we actually need this?
//static constexpr int GPU2DSpeedFirstInPair = 810 * TimingFrac; // 810 | the delay between finishing reading a pair and beginning reading a new pair.
//static constexpr int GPU2DSpeedSecondInPair = 296 * TimingFrac; // 296 | 295??? | the delay between finishing reading the first scanline
// and beginning reading the second scanline of a scanline pair.
//static constexpr int GPU2DReadScanline = 256 * TimingFrac; // 256 | the time it takes to read a scanline.
//static constexpr int GPU2DReadSLPair = 1618 * TimingFrac; // 1618 | notably the same as the scanline increment.
//static constexpr int GPU2D48Scanlines = GPU2DReadSLPair * 24; // time to read 48 scanlines.
// compile-time list of scanline read times
// these *should* always occur at the same point in each frame, so it shouldn't matter if we make them fixed
static constexpr std::array<u32, 192> SLRead = []() constexpr {
@ -373,7 +366,7 @@ public:
static constexpr int Arbitrary = 565; // extra value after the scanline is read at which the cutoff of a scanline should be...?
// idk why this is needed. im probably doing something wrong.
// the point at which rdlines decrements not sure why it's different...?
// the point at which rdlines decrements. not sure why it's different...?
static constexpr std::array<u32, 192> RDDecrement = []() constexpr {
std::array<u32, 192> dec {};
@ -386,28 +379,12 @@ public:
// GPU 3D Rasterization Timings: For Emulating Scanline Timeout
//static constexpr int ScanlinePairLength = 2130 * TimingFrac;
//static constexpr int ScanlineTimeout = 1686 * TimingFrac; // 2126? 1686?
//static constexpr int ScanlineBreak = 4 * TimingFrac;
//static constexpr int ScanlineBreak2 = 40 * TimingFrac;
//static constexpr int FakeTiming = 2 * TimingFrac;
//static constexpr int FraudulentTiming = 1120 * TimingFrac; // bad theory. todo: find a better one.
//static constexpr int InitialTiming = 48688 * TimingFrac; // 48688 | add 1618*2 to get the timeout of the second scanline pair
//static constexpr int Post50Max = 51116 * TimingFrac; // 51116 | for some reason it doesn't care about how full it actually is,
// it just cares about if its the first 50 scanlines to speedrun rendering?
static constexpr int FinalPassLen = 500 * TimingFrac; // 496 (might technically be 500?) | the next scanline cannot begin while a scanline's final pass is in progress
// (can be interpreted as the minimum amount of cycles for the next scanline
// pair to start after the previous pair began) (related to final pass?)
static constexpr int ScanlinePushDelay = 242 * TimingFrac;
static constexpr int EMGlitchThreshhold = 502 * TimingFrac; // The threshold for the edge marking glitch behavior to change.
static constexpr int EMFixNum = 571 * TimingFrac; // Arbitrary value added to fix edge marking glitch, not sure why it's needed?
//static constexpr int TimeoutIncrement = 2130 * TimingFrac;
//static constexpr int ScanlineIncrementold = 1618 * TimingFrac; // 1618 | how much to regain per scanline pair
//static constexpr int ScanlineIncrement = 2114 * TimingFrac; // 2114 | how much time a scanline pair "gains"
//static constexpr int AbortIncrement = 12 * TimingFrac; // 12 | how much extra to regain after an aborted scanline (total 2126)
// (why does the next pair get more time if the previous scanline is aborted?)
//static constexpr int UnderflowFlag = 2 * TimingFrac; // 14 | How many cycles need to be left for the 3ddispcnt rdlines underflow flag to be set
//static constexpr int FinishScanline = 512 * TimingFrac;
// GPU 3D Rasterization Timings II: For Tracking Timing Behaviors
@ -429,11 +406,6 @@ public:
static constexpr int FirstPolyDelay = 4 * TimingFrac; // 4 | Min amount of cycles to begin a scanline? (minimum time it takes to init the first polygon?)
// (Amount of time before the end of the cycle a scanline must abort?)
// static constexpr int RasterTimingCap = 51116 * TimingFrac;
// static constexpr int PerScanlineTiming = 1064 * TimingFrac; // approximate currently, used to calc RDLines. TEMPORARY UNTIL ACCURATE "FRAMEBUFFER" CAN BE IMPLEMENTED
// static constexpr int PerScanlineRecup = 2112 * TimingFrac; // seems to check out? // should be the "free" time the gpu has to do the calculation
// static constexpr int PerRightSlope = 1 * TimingFrac;
// static constexpr int FirstPixelTiming;
class Renderer3D
{

87
src/GPU3D_Soft.cpp
View File

@ -1632,11 +1632,9 @@ void SoftRenderer::ScanlineFinalPass(const GPU3D& gpu3d, s32 y, bool checkprev,
if (x == 0)
{
// edge marking bug emulation
if (checkprev)
{
if (CheckEdgeMarkingClearPlane(gpu3d, polyid, z)) goto pass; // check against the clear plane
}
else if (CheckEdgeMarkingPixel(polyid, z, pixeladdr-(ScanlineWidth+1))) goto pass; // checks the right edge of the scanline 2 scanlines ago
if (checkprev ? CheckEdgeMarkingClearPlane(gpu3d, polyid, z) : // check against the clear plane
CheckEdgeMarkingPixel(polyid, z, pixeladdr-1 - ScanlineWidth)) // checks the right edge of the scanline 2 scanlines ago
goto pass;
}
else if (CheckEdgeMarkingPixel(polyid, z, pixeladdr-1)) goto pass; // normal check
@ -1644,11 +1642,9 @@ void SoftRenderer::ScanlineFinalPass(const GPU3D& gpu3d, s32 y, bool checkprev,
if (x == 255)
{
// edge marking bug emulation
if (checknext)
{
if (CheckEdgeMarkingClearPlane(gpu3d, polyid, z)) goto pass; // check against the clear plane
}
else if (CheckEdgeMarkingPixel(polyid, z, pixeladdr+(ScanlineWidth+1))) goto pass; // checks the left edge of the scanline 2 scanlines ahead
if (checknext ? CheckEdgeMarkingClearPlane(gpu3d, polyid, z) : // check against the clear plane
CheckEdgeMarkingPixel(polyid, z, pixeladdr+1 + ScanlineWidth)) // checks the left edge of the scanline 2 scanlines ahead
goto pass;
}
else if (CheckEdgeMarkingPixel(polyid, z, pixeladdr+1)) goto pass; // normal check
@ -1884,43 +1880,24 @@ void SoftRenderer::ClearBuffers(const GPU& gpu)
}
}
u16 SoftRenderer::BeginPushScanline(s32 y, s32 pixelstodraw)
void SoftRenderer::RenderPolygonsFast(GPU& gpu, Polygon** polygons, int npolys)
{
// push the finished scanline to the appropriate frame buffers.
// if a scanline is late enough to intersect with the 2d engine read time it will be partially drawn
u16 start;
if (pixelstodraw >= 256 || pixelstodraw <= 0) // if scheduled after or 256 cycles before a scanline read render full scanline
int j = 0;
for (int i = 0; i < npolys; i++)
{
start = 0;
pixelstodraw = 256;
if (polygons[i]->Degenerate) continue;
SetupPolygon(&PolygonList[j++], polygons[i]);
}
else // render partial scanline
RenderScanline<false>(gpu, 0, 0, j, nullptr);
for (s32 y = 1; y < 192; y++)
{
start = ScanlineWidth - pixelstodraw;
// it seems to read in pairs of two every two cycles? looks jittery
bool jitter = pixelstodraw % 2;
pixelstodraw += jitter;
start -= jitter;
RenderScanline<false>(gpu, y, 0, j, nullptr);
ScanlineFinalPass<true>(gpu.GPU3D, y-1, true, true);
}
u8 bufferpos = y % 48;
memcpy(&RDBuffer[bufferpos*ScanlineWidth+start], &ColorBuffer[y*ScanlineWidth+start], 4 * pixelstodraw);
return start;
}
void SoftRenderer::ReadScanline(s32 y)
{
u8 bufferpos = y % 48;
memcpy(&FinalBuffer[y*ScanlineWidth], &RDBuffer[bufferpos*ScanlineWidth], 4 * ScanlineWidth);
}
void SoftRenderer::FinishPushScanline(s32 y, s32 pixelsremain)
{
if (pixelsremain = 0) return;
u8 bufferpos = y % 48;
memcpy(&RDBuffer[bufferpos*ScanlineWidth], &ColorBuffer[y*ScanlineWidth], 4 * pixelsremain);
ScanlineFinalPass<true>(gpu.GPU3D, 191, true, true);
}
#define RDLINES_COUNT_INCREMENT\
@ -1937,10 +1914,11 @@ void SoftRenderer::FinishPushScanline(s32 y, s32 pixelsremain)
/* simulate the process of scanlines being read from the 48 scanline buffer */\
while (scanlineswaiting >= 47 || RasterTiming >= SLRead[nextread] + Arbitrary)\
{\
if (RasterTiming < SLRead[nextread] + Arbitrary)\
if (RasterTiming < SLRead[nextread] + Arbitrary) /* why + 565? */\
{\
RasterTiming += timespent = (SLRead[nextread] + Arbitrary) - RasterTiming; /* why + 565? */\
timespent = (SLRead[nextread] + Arbitrary) - RasterTiming;\
timespent += EMFixNum; /* fixes edge marking bug emulation. not sure why this is needed? */\
RasterTiming = (SLRead[nextread] + Arbitrary);\
}\
scanlineswaiting--;\
nextread++;\
@ -1961,27 +1939,6 @@ void SoftRenderer::FinishPushScanline(s32 y, s32 pixelsremain)
/* set the underflow flag if one of the scanlines came within 14 cycles of visible underflow */\
if ((ScanlineTimeout <= RasterTiming) && (gpu.GPU3D.UnderflowFlagVCount == (u16)-1)) gpu.GPU3D.UnderflowFlagVCount = y - (y&1 ? 0 : 1);
void SoftRenderer::RenderPolygonsFast(GPU& gpu, Polygon** polygons, int npolys)
{
int j = 0;
for (int i = 0; i < npolys; i++)
{
if (polygons[i]->Degenerate) continue;
SetupPolygon(&PolygonList[j++], polygons[i]);
}
int dummy;
RenderScanline<false>(gpu, 0, 0, j, &dummy);
for (s32 y = 1; y < 192; y++)
{
RenderScanline<false>(gpu, y, 0, j, &dummy);
ScanlineFinalPass<true>(gpu.GPU3D, y-1, true, true);
}
ScanlineFinalPass<true>(gpu.GPU3D, 191, true, true);
}
void SoftRenderer::RenderPolygonsTiming(GPU& gpu, Polygon** polygons, int npolys)
{
int j = 0;
@ -1994,7 +1951,7 @@ void SoftRenderer::RenderPolygonsTiming(GPU& gpu, Polygon** polygons, int npolys
// reset scanline trackers
gpu.GPU3D.UnderflowFlagVCount = -1;
gpu.GPU3D.RDLinesTemp = 63;
ScanlineTimeout = FrameLength; // CHECKME
ScanlineTimeout = 0x7FFFFFFF; // CHECKME: first scanline pair timeout.
s32 rastertimingeven, rastertimingodd; // always init to 0 at the start of a scanline render
s32 scanlineswaiting = 0, slwaitingrd = 0;
s32 nextread = 0, nextreadrd = 0;