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

Plugins/ZShell/Blobs/blobinvertedrect.cpp

@@ -11,28 +11,24 @@
 BlobInvertedRect::BlobInvertedRect(QQuickItem* parent) : BlobShape(parent) {}
 
 static void setFrameIndices(quint16* idx) {
-	// Top strip: 0-1-4, 1-5-4
 	idx[0] = 0;
 	idx[1] = 1;
 	idx[2] = 4;
 	idx[3] = 1;
 	idx[4] = 5;
 	idx[5] = 4;
-	// Right strip: 1-2-5, 2-6-5
 	idx[6] = 1;
 	idx[7] = 2;
 	idx[8] = 5;
 	idx[9] = 2;
 	idx[10] = 6;
 	idx[11] = 5;
-	// Bottom strip: 2-3-6, 3-7-6
 	idx[12] = 2;
 	idx[13] = 3;
 	idx[14] = 6;
 	idx[15] = 3;
 	idx[16] = 7;
 	idx[17] = 6;
-	// Left strip: 3-0-7, 0-4-7
 	idx[18] = 3;
 	idx[19] = 0;
 	idx[20] = 7;
@@ -50,17 +46,20 @@ QSGNode* BlobInvertedRect::updatePaintNode(
 
 	const float pad = static_cast<float>(m_group->smoothing());
 
-	// Compute inner hole boundary in local coords
-	// Inset past the inner border edge by 2x smoothing to cover the blend zone
 	const float inset = pad * 2.0f;
 	const float holeLeft = static_cast<float>(m_borderLeft) + inset;
 	const float holeTop = static_cast<float>(m_borderTop) + inset;
 	const float holeRight = static_cast<float>(width() - m_borderRight) - inset;
 	const float holeBot = static_cast<float>(height() - m_borderBottom) - inset;
 
-	// If the hole is too small or invalid, fall back to full quad
-	if (holeLeft >= holeRight || holeTop >= holeBot)
+	if (holeLeft >= holeRight || holeTop >= holeBot) {
+		auto* oldGeoNode = static_cast<QSGGeometryNode*>(oldNode);
+		if (oldNode && oldGeoNode->geometry()->vertexCount() != 4) {
+			delete oldNode;
+			oldNode = nullptr;
+		}
 		return BlobShape::updatePaintNode(oldNode, nullptr);
+	}
 
 	auto* node = static_cast<QSGGeometryNode*>(oldNode);
 
@@ -87,7 +86,6 @@ QSGNode* BlobInvertedRect::updatePaintNode(
 		node->setFlag(QSGNode::OwnsMaterial);
 	}
 
-	// Outer bounds (local coords)
 	const float x0 = static_cast<float>(m_localPaddedRect.x());
 	const float y0 = static_cast<float>(m_localPaddedRect.y());
 	const float x1 = x0 + static_cast<float>(m_localPaddedRect.width());
@@ -95,15 +93,12 @@ QSGNode* BlobInvertedRect::updatePaintNode(
 	const float w = x1 - x0;
 	const float h = y1 - y0;
 
-	// Update vertex positions and texture coordinates
 	auto* v = node->geometry()->vertexDataAsTexturedPoint2D();
 
-	// Outer corners
 	v[0].set(x0, y0, 0.0f, 0.0f);
 	v[1].set(x1, y0, 1.0f, 0.0f);
 	v[2].set(x1, y1, 1.0f, 1.0f);
 	v[3].set(x0, y1, 0.0f, 1.0f);
-	// Inner corners (hole)
 	v[4].set(holeLeft, holeTop, (holeLeft - x0) / w, (holeTop - y0) / h);
 	v[5].set(holeRight, holeTop, (holeRight - x0) / w, (holeTop - y0) / h);
 	v[6].set(holeRight, holeBot, (holeRight - x0) / w, (holeBot - y0) / h);
@@ -111,7 +106,6 @@ QSGNode* BlobInvertedRect::updatePaintNode(
 
 	node->markDirty(QSGNode::DirtyGeometry);
 
-	// Update material uniforms
 	auto* material = static_cast<BlobMaterial*>(node->material());
 	material->m_paddedX = m_cachedPaddedX;
 	material->m_paddedY = m_cachedPaddedY;
@@ -218,7 +212,7 @@ void BlobInvertedRect::outerCornerRadii(float out[4]) const {
 	const auto base = std::min(static_cast<float>(m_outerRadius), maxR);
 	out[0] = std::min(
 		m_outerTopRightRadius >= 0 ? static_cast<float>(m_outerTopRightRadius)
-								  : base,
+								   : base,
 		maxR);
 	out[1] = std::min(
 		m_outerBottomRightRadius >= 0