fix: blobs now allow to be drawn in device pixels to stay sharp

Plugins/ZShell/Blobs/blobgroup.cpp

@@ -2,7 +2,17 @@
 #include "blobinvertedrect.hpp"
 #include "blobshape.hpp"
 
-BlobGroup::BlobGroup(QObject* parent) : QObject(parent) {}
+#include <algorithm>
+
+namespace {
+constexpr int k_pumpMs = 16;
+} // namespace
+
+BlobGroup::BlobGroup(QObject* parent) : QObject(parent) {
+	m_physicsPump.setInterval(k_pumpMs);
+	m_physicsPump.setTimerType(Qt::CoarseTimer);
+	connect(&m_physicsPump, &QTimer::timeout, this, &BlobGroup::pumpPhysics);
+}
 
 BlobGroup::~BlobGroup() {
 	for (auto* shape : std::as_const(m_shapes))
@@ -12,6 +22,7 @@ BlobGroup::~BlobGroup() {
 }
 
 void BlobGroup::setSmoothing(qreal s) {
+	if (s < 0.5) s = 0.5;
 	if (qFuzzyCompare(m_smoothing, s)) return;
 	m_smoothing = s;
 	emit smoothingChanged();
@@ -73,7 +84,6 @@ void BlobGroup::markShapeDirty(BlobShape* source) {
 	source->polish();
 	source->update();
 
-	// Use cached padded rects to find spatial neighbors
 	const float pad = static_cast<float>(m_smoothing) * 2.0f;
 	const QRectF srcRect(
 		static_cast<double>(source->m_cachedPaddedX - pad),
@@ -103,6 +113,33 @@ void BlobGroup::markShapeDirty(BlobShape* source) {
 void BlobGroup::ensurePhysicsUpdated() {
 	if (m_physicsUpdated) return;
 	m_physicsUpdated = true;
+	for (auto* shape : std::as_const(m_shapes)) {
+		shape->updatePhysics();
+		if (shape->needsFrame()) {
+			shape->polish();
+			shape->update();
+		}
+	}
+}
+
+void BlobGroup::requestPhysics() {
+	if (!m_physicsPump.isActive()) m_physicsPump.start();
+}
+
+void BlobGroup::pumpPhysics() {
 	for (auto* shape : std::as_const(m_shapes))
 		shape->updatePhysics();
+
+	const bool anyMoving = std::any_of(
+		m_shapes.cbegin(), m_shapes.cend(), [](const BlobShape* shape) {
+			return shape->needsFrame();
+		});
+
+	if (!anyMoving) {
+		m_physicsPump.stop();
+		return;
+	}
+
+	markDirty();
+	m_physicsUpdated = true;
 }