Ω-W1-T3 remediation: meter stays live and washed under the curve popup, not frozen

src/shell/instrument/editor_paint_deck.cpp

@@ -7,6 +7,7 @@
 
 #ifdef _WIN32
 
+#include <cassert>
 #include <string>
 #include <vector>
 
@@ -62,6 +63,7 @@ void drawMeterField(LICE_IBitmap* bmp, const MeterRects& m, const MasterMeterUi&
     // A column narrower than the interior needs yields all-empty rects, which under rect.h's
     // contract means suppressed — not a zero-height field to fill, tick twelve times and cap.
     if (m.field.empty()) return;
+    assert(meterBarsWithinField(m));  // the self-containment invariant this draw rests on
     fillSurface(bmp, toKitBox(m.field), Role::BgCell, InteractionState::Rest);
 
     // Scale: a rule every 6 dB, numeralled every 12 with 0 dB heavier — the reference the
@@ -111,6 +113,14 @@ void drawMeterField(LICE_IBitmap* bmp, const MeterRects& m, const MasterMeterUi&
 
 void ReaSamplerEditor::paintMeterField(LICE_IBitmap* bmp) {
     drawMeterField(bmp, meterRects_, masterMeter_);
+    // A full paint under the curve popup washes the whole client at 0.50 alpha AFTER the deck
+    // draws (paintCurvePopup); a meter-only fast-path frame draws fresh opaque bars into that
+    // same back buffer, so it must reapply the same wash to the field alone or the meter would
+    // flash through at full brightness against the dimmed rest of the face.
+    if (curvePopup_ != CurveTarget::kNone && !meterRects_.field.empty()) {
+        const Rect& f = meterRects_.field;
+        LICE_FillRect(bmp, f.x, f.y, f.width, f.height, toLice(roleColor(Role::BgBase)), 0.50f, 0);
+    }
 }
 
 void ReaSamplerEditor::paintDeck(LICE_IBitmap* bmp, const FaceLayout& fl) {