piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2024-11-14 05:17:40 -07:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

attempt at some cleanup

Browse Source
This commit is contained in:
Jaklyy 2024-04-03 10:23:03 -04:00
parent b32f519c5a
commit e1cbadbe60
1 changed files with 63 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
src/GPU3D_Soft.cpp
View File

@ -1877,6 +1877,43 @@ void SoftRenderer::FinishPushScanline(s32 y, s32 pixelsremain)
memcpy(&RDBuffer[bufferpos*ScanlineWidth], &ColorBuffer[y*ScanlineWidth], 4 * pixelsremain);
}
#define RDLINES_COUNT_INCREMENT\
/* feels wrong, needs improvement */\
while (RasterTiming >= RDDecrement[nextreadrd])\
{\
slwaitingrd--;\
nextreadrd++;\
/* update rdlines_count register */\
if (gpu.GPU3D.RDLinesTemp > slwaitingrd) gpu.GPU3D.RDLinesTemp = slwaitingrd;\
}
#define SCANLINE_BUFFER_SIM\
/* simulate the process of scanlines being read from the 48 scanline buffer */\
while (scanlineswaiting >= 47 || RasterTiming >= SLRead[nextread] + Arbitrary)\
{\
if (RasterTiming < SLRead[nextread] + Arbitrary)\
{\
RasterTiming += timespent = (SLRead[nextread] + Arbitrary) - RasterTiming; /* why + 565? */\
timespent += EMFixNum; /* fixes edge marking bug emulation. not sure why this is needed? */\
}\
scanlineswaiting--;\
nextread++;\
}
#define RENDER_SCANLINES(y)\
/* update sl timeout */\
ScanlineTimeout = SLRead[y-1] - FinalPassLen;\
\
RenderScanline(gpu, y, j, &rastertimingeven);\
RenderScanline(gpu, y+1, j, &rastertimingodd);\
\
prevtimespent = timespent;\
RasterTiming += timespent = std::max(std::initializer_list<s32> {rastertimingeven, rastertimingodd, FinalPassLen});\
RasterTiming += std::clamp(ScanlineTimeout - RasterTiming, 0, 12);\
\
/* set the underflow flag if one of the scanlines came within 14 cycles of visible underflow */\
if (ScanlineTimeout <= RasterTiming) gpu.GPU3D.RDLinesUnderflow = true;
void SoftRenderer::RenderPolygons(GPU& gpu, Polygon** polygons, int npolys)
{
int j = 0;
@ -1885,26 +1922,19 @@ void SoftRenderer::RenderPolygons(GPU& gpu, Polygon** polygons, int npolys)
if (polygons[i]->Degenerate) continue;
SetupPolygon(&PolygonList[j++], polygons[i]);
}
//init internal buffer
ClearBuffers(gpu);
// reset scanline trackers
gpu.GPU3D.RDLinesUnderflow = false;
gpu.GPU3D.RDLinesTemp = 63;
ScanlineTimeout = FrameLength; // CHECKME
s32 rastertimingeven; // always init to 0 at the start of a scanline render
s32 rastertimingodd;
s32 rastertimingeven, rastertimingodd; // always init to 0 at the start of a scanline render
s32 scanlineswaiting = 0, slwaitingrd = 0;
s32 nextread = 0, nextreadrd = 0;
u32 timespent, prevtimespent;
s32 scanlineswaiting = 0;
s32 nextread = 0;
s32 slwaitingrd = 0;
s32 nextreadrd = 0;
u32 timespent;
u32 prevtimespent;
// scanlines are rendered in pairs of two
RenderScanline(gpu, 0, j, &rastertimingeven);
@ -1914,113 +1944,46 @@ void SoftRenderer::RenderPolygons(GPU& gpu, Polygon** polygons, int npolys)
RasterTiming = timespent = std::max(std::initializer_list<s32> {rastertimingeven, rastertimingodd, FinalPassLen});
// 12 cycles at the end of a "timeout" are always used for w/e reason
RasterTiming += std::clamp(ScanlineTimeout - RasterTiming, 0, 12);
// if first pair was not delayed past the first read, then later scanlines cannot either
// this allows us to implement a fast path
//if (SLRead[0] - timespent + ScanlinePushDelay >= 256)
{
// begin scanline timeout
ScanlineTimeout = SLRead[1] - FinalPassLen;
RenderScanline(gpu, 2, j, &rastertimingeven);
RenderScanline(gpu, 3, j, &rastertimingodd);
// the time spent on the previous scanline pair is important for emulating the edge marking bug properly
prevtimespent = timespent;
RasterTiming += timespent = std::max(std::initializer_list<s32> {rastertimingeven, rastertimingodd, FinalPassLen});
RasterTiming += std::clamp(ScanlineTimeout - RasterTiming, 0, 12);
// set the underflow flag if one of the scanlines came within 14 cycles of visible underflow
if (ScanlineTimeout <= RasterTiming) gpu.GPU3D.RDLinesUnderflow = true;
RENDER_SCANLINES(2)
scanlineswaiting++;
slwaitingrd++;
// simulate the process of scanlines being read from the 48 scanline buffer
while (RasterTiming >= SLRead[nextread] + Arbitrary)
{
if (RasterTiming < SLRead[nextread] + Arbitrary)
{
RasterTiming += timespent = (SLRead[nextread] + Arbitrary) - RasterTiming; // why + 565?
timespent += EMFixNum; // fixes edge marking bug emulation. not sure why this is needed?
}
scanlineswaiting--;
nextread++;
// update rdlines_count register
//if (gpu.GPU3D.RDLinesTemp > scanlineswaiting) gpu.GPU3D.RDLinesTemp = scanlineswaiting; // TODO: not accurate, rdlines appears to update early in some manner?
}
// feels wrong, needs improvement.
while (RasterTiming >= RDDecrement[nextreadrd])
{
slwaitingrd--;
nextreadrd++;
// update rdlines_count register
if (gpu.GPU3D.RDLinesTemp > slwaitingrd) gpu.GPU3D.RDLinesTemp = slwaitingrd;
}
SCANLINE_BUFFER_SIM
RDLINES_COUNT_INCREMENT
// final pass pairs are the previous scanline pair offset -1 scanline, thus we start with only building one
ScanlineFinalPass<true>(gpu.GPU3D, 0, true, timespent >= EMGlitchThreshhold);
// main loop
for (int y = 4; y < 192; y+=2)
{
//update sl timeout
ScanlineTimeout = SLRead[y-1] - FinalPassLen;
RenderScanline(gpu, y, j, &rastertimingeven);
RenderScanline(gpu, y+1, j, &rastertimingodd);
prevtimespent = timespent;
RasterTiming += timespent = std::max(std::initializer_list<s32> {rastertimingeven, rastertimingodd, FinalPassLen});
RasterTiming += std::clamp(ScanlineTimeout - RasterTiming, 0, 12);
// set the underflow flag if one of the scanlines came within 14 cycles of visible underflow
if (ScanlineTimeout <= RasterTiming) gpu.GPU3D.RDLinesUnderflow = true;
RENDER_SCANLINES(y)
scanlineswaiting += 2;
slwaitingrd += 2;
// simulate the process of scanlines being read from the 48 scanline buffer
while (scanlineswaiting >= 47 || RasterTiming >= SLRead[nextread] + Arbitrary)
{
if (RasterTiming < SLRead[nextread] + Arbitrary)
{
RasterTiming += timespent = (SLRead[nextread] + Arbitrary) - RasterTiming; // why + 565?
timespent += EMFixNum; // fixes edge marking bug emulation. not sure why this is needed?
}
scanlineswaiting--;
nextread++;
// update rdlines_count register
//if (gpu.GPU3D.RDLinesTemp > scanlineswaiting) gpu.GPU3D.RDLinesTemp = scanlineswaiting; // TODO: not accurate, rdlines appears to update early in some manner?
}
SCANLINE_BUFFER_SIM
// feels wrong, needs improvement.
while (RasterTiming >= RDDecrement[nextreadrd])
{
slwaitingrd--;
nextreadrd++;
// update rdlines_count register
if (gpu.GPU3D.RDLinesTemp > slwaitingrd) gpu.GPU3D.RDLinesTemp = slwaitingrd;
}
RDLINES_COUNT_INCREMENT
ScanlineFinalPass<true>(gpu.GPU3D, y-3, prevtimespent >= EMGlitchThreshhold || y-3 == 1, timespent >= EMGlitchThreshhold);
ScanlineFinalPass<true>(gpu.GPU3D, y-2, prevtimespent >= EMGlitchThreshhold, timespent >= EMGlitchThreshhold);
}
scanlineswaiting += 2;
slwaitingrd += 2;
prevtimespent = timespent;
scanlineswaiting += 2;
slwaitingrd += 2;
prevtimespent = timespent;
// emulate read timings one last time, since it shouldn't matter after this
// additionally dont bother tracking rdlines anymore since it shouldn't be able to decrement anymore (CHECKME)
while (scanlineswaiting >= 47 || RasterTiming >= SLRead[nextread] + Arbitrary)
{
if (RasterTiming < SLRead[nextread] + Arbitrary)
{
RasterTiming += timespent = (SLRead[nextread] + Arbitrary) - RasterTiming; // why + 565?
timespent += EMFixNum; // fixes edge marking bug emulation. not sure why this is needed?
}
scanlineswaiting--;
nextread++;
}
SCANLINE_BUFFER_SIM
// finish the last 3 scanlines
ScanlineFinalPass<true>(gpu.GPU3D, 189, prevtimespent >= EMGlitchThreshhold, timespent >= EMGlitchThreshhold);
@ -2030,20 +1993,14 @@ void SoftRenderer::RenderPolygons(GPU& gpu, Polygon** polygons, int npolys)
}
/*else
{
ScanlineFinalPass(gpu, 0, false, false);
s32 pixelstopush = SLRead[0] - (timespent + ScanlinePushDelay);
if (pixelstopush > 256) pixelstopush = 256;
//timespent + ScanlinePushDelay + ScanlineReadSpeed > SLRead[0]
rastertimingeven = 0;
rastertimingodd = 0;
RenderScanline(gpu, 2, j, &rastertimingeven);
RenderScanline(gpu, 3, j, &rastertimingodd);
Coming soon^tm to a melonDS near you
}*/
}
#undef RENDER_SCANLINES
#undef SCANLINE_BUFFER_SIM
#undef RDLINES_COUNT_INCREMENT
void SoftRenderer::VCount144(GPU& gpu)
{
if (RenderThreadRunning.load(std::memory_order_relaxed) && !gpu.GPU3D.AbortFrame)