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integrate Cyd's glass-panel-perf (adopted over the local dirty-gate draft)

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# Conflicts:
#	engine/MUNGA_L4/L4GLASSWIN.cpp
This commit is contained in:
Joe DiPrima
2026-08-09 23:27:16 -05:00
parent 2ed51cb1f3 3aeb2dbbe8
commit 773595b347
3 changed files with 139 additions and 7 deletions
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engine/MUNGA_L4/L4GLASSWIN.cpp
+111 -7
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@@ -129,6 +129,12 @@ struct GWin
char monitorName[40]; // the PHYSICAL monitor this window landed on
// (\.\DISPLAYn), stamped at creation; shown
// by BT_POD_IDENT so the cab can be mapped.
// Dirty-skip (2026-08-09): the last change token the pump blitted for this
// window (plane checksum + lamp render). Zero-init (static storage); the pump
// re-blits only when the token differs, so unchanged panels cost nothing.
unsigned long lastToken;
int haveToken;
};
static GWin gWins[8];
@@ -1418,7 +1424,16 @@ static void
info.bmiHeader.biCompression = BI_RGB;
const RECT &r = w->surfaceRect;
SetStretchBltMode(dc, HALFTONE);
// STRETCH MODE (perf, 2026-08-09): default COLORONCOLOR. HALFTONE runs a
// per-output-pixel resample filter; done synchronously for all 7 glass windows
// every ~16 Hz repaint (BTGlassPanels_Tick), it was the per-display-mode perf
// sink -- playtesters saw ~20 fps in the exploded panels vs ~130 fps in the
// cockpit surround (same scene, same machine). The MFDs are low-res pixel
// content, so nearest-neighbour reads crisp (and closer to the pod CRT).
// BT_GLASS_SMOOTH=1 restores HALFTONE for anyone who prefers smoothing to speed.
static int sSmooth = -1;
if (sSmooth < 0) sSmooth = getenv("BT_GLASS_SMOOTH") ? 1 : 0;
SetStretchBltMode(dc, sSmooth ? HALFTONE : COLORONCOLOR);
SetBrushOrgEx(dc, 0, 0, NULL);
StretchDIBits(dc,
r.left, r.top, r.right - r.left, r.bottom - r.top,
@@ -2050,6 +2065,62 @@ void
// one-shot re-snap); a focused window just repaints from whichever fires first.
//###########################################################################
//
// GLASS DIRTY-SKIP (2026-08-09): re-blit only the windows whose content changed.
// Each window is a plane of the ONE shared gauge pixelBuffer, so its change token is
// the masked plane checksum (SVGA16::PlaneChecksum over every port that can feed the
// window) combined with each button's RENDERED lamp brightness + held/latched state.
// Folding the flash BRIGHTNESS in (not the raw lamp state) means a flashing lamp
// repaints exactly when it toggles, and a static panel -- or a fully idle cockpit --
// skips its expand + StretchDIBits entirely. The plane checksum is the only added
// cost (once per window per ~16 Hz pump) and is far cheaper than the paint it saves.
//
static unsigned long
GlassWindowToken(GaugeRenderer *gr, GWin *w, unsigned long tick)
{
unsigned long token = 2166136261UL;
if (w->portPrimary != NULL && gr != NULL)
{
// Every plane that could feed the window (primary + Eng twin + RGB group +
// their twins) -- OR their masks so a change to ANY is caught; checksum once.
const char *ports[8];
int np = 0;
ports[np++] = w->portPrimary;
if (w->portAlt != NULL) ports[np++] = w->portAlt;
for (int gi = 0; gi < w->groupCount && np < 7; ++gi)
{
ports[np++] = w->groupPort[gi];
if (w->groupAlt[gi] != NULL && np < 8) ports[np++] = w->groupAlt[gi];
}
int combined = 0;
SVGA16 *svga = NULL;
for (int i = 0; i < np; ++i)
{
L4GraphicsPort *p =
static_cast<L4GraphicsPort*>(gr->GetGraphicsPort(ports[i]));
if (p == NULL) continue;
combined |= p->GetBitMask();
if (svga == NULL) svga = static_cast<SVGA16*>(p->graphicsDisplay);
}
if (svga != NULL && combined != 0)
token ^= svga->PlaneChecksum(combined);
}
// Lamps: each button's RENDERED brightness + held/latched, so a flash toggle or a
// press repaints exactly the window it lives on.
for (int j = 0; j < w->buttonCount; ++j)
{
int addr = w->buttons[j].address;
unsigned long shade =
(unsigned long)LampBrightnessOf(PadRIO::GetLampState(addr), tick);
int held = (addr == pressedAddress) || latched[addr & 0x7F];
token = (token ^ ((unsigned long)(addr & 0xFF) << 4)
^ (shade << 1) ^ (unsigned long)held) * 16777619UL;
}
return token;
}
void
BTGlassPanels_Tick()
{
@@ -2062,16 +2133,47 @@ void
return;
sLastPaint = now;
// MERGED: Cyd's dirty-skip (glass-panel-perf) + the #149 [glassperf]
// telemetry. BT_GLASS_SWEEP=1 bypasses the skip entirely -- the legacy
// always-repaint escape hatch, kept so the field can A/B in one env var.
static const int sGlassPerf =
!(getenv("BT_PERF_LOG") && *getenv("BT_PERF_LOG") == '0');
static const int sLegacySweep =
(getenv("BT_GLASS_SWEEP") && *getenv("BT_GLASS_SWEEP") == '1');
LARGE_INTEGER gt0, gt1, gfq;
QueryPerformanceCounter(&gt0);
GaugeRenderer *gr = BTResolveGaugeRenderer();
int repainted = 0;
for (int i = 0; i < gWinCount; ++i)
{
if (gWins[i].hwnd != NULL)
GWin &w = gWins[i];
if (w.hwnd == NULL)
continue;
unsigned long token = GlassWindowToken(gr, &w, now);
if (!sLegacySweep && w.haveToken && token == w.lastToken)
continue; // gauges + lamps unchanged -> skip this window
w.lastToken = token;
w.haveToken = 1;
++repainted;
InvalidateRect(w.hwnd, NULL, FALSE);
UpdateWindow(w.hwnd); // synchronous paint, not the throttled queue
}
// BT_GLASS_DIRTY: report how many window-repaints the dirty-skip let through vs
// the old fixed gWinCount-per-pump, so the saving is visible.
static int sDirtyLog = -1;
if (sDirtyLog < 0) sDirtyLog = getenv("BT_GLASS_DIRTY") ? 1 : 0;
if (sDirtyLog)
{
static unsigned long sWin = 0;
static int sPumps = 0, sPaints = 0;
++sPumps; sPaints += repainted;
if (now - sWin >= 2000)
{
InvalidateRect(gWins[i].hwnd, NULL, FALSE);
UpdateWindow(gWins[i].hwnd); // synchronous paint, not the throttled queue
DEBUG_STREAM << "[glass-dirty] " << sPumps << " pumps -> " << sPaints
<< " window-repaints (was " << (sPumps * gWinCount) << " always-on)\n"
<< std::flush;
sWin = now; sPumps = 0; sPaints = 0;
}
}
QueryPerformanceCounter(&gt1);
@@ -2083,14 +2185,16 @@ void
// against D3D present, tickMs IS the per-frame tax and the per-window
// split names the guilty panel. Default ON like [segperf]; BT_PERF_LOG=0
// opts out.
static double sTickMs = 0.0; static int sTicks = 0;
static double sTickMs = 0.0; static int sTicks = 0; static int sPaintAcc = 0;
sPaintAcc += repainted;
static unsigned long sLastReport = 0;
sTickMs += 1000.0 * (double)(gt1.QuadPart - gt0.QuadPart) / (double)gfq.QuadPart;
++sTicks;
if (sGlassPerf && now - sLastReport >= 1000)
{
sLastReport = now;
DEBUG_STREAM << "[glassperf] ticks=" << sTicks << " tickMs=" << sTickMs;
DEBUG_STREAM << "[glassperf] ticks=" << sTicks << " tickMs=" << sTickMs
<< " paints=" << sPaintAcc;
for (int i = 0; i < gWinCount; ++i)
{
if (gWins[i].perfN > 0)
@@ -2099,6 +2203,6 @@ void
gWins[i].perfMs = 0.0; gWins[i].perfN = 0;
}
DEBUG_STREAM << "\n" << std::flush;
sTickMs = 0.0; sTicks = 0;
sTickMs = 0.0; sTicks = 0; sPaintAcc = 0;
}
}