update

2026-05-14 22:12:40 +08:00
parent 334845d732
commit 3ba8ba80b3
6 changed files with 252 additions and 69 deletions
@@ -123,4 +123,29 @@ void applyBlackFillToBackground(QImage& bgCutout, const QVector<QPointF>& polyWo
    p.end();
 }

+void applyBlackHolesToImageRegion(QImage& regionPremul, const QRect& cropWorldRect,
+                                  const QVector<QVector<QPointF>>& holePolysWorld) {
+    if (regionPremul.isNull() || !cropWorldRect.isValid()) {
+        return;
+    }
+    QPainter painter(&regionPremul);
+    painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(QColor(0, 0, 0, 255));
+    const double ox = static_cast<double>(cropWorldRect.left());
+    const double oy = static_cast<double>(cropWorldRect.top());
+    for (const QVector<QPointF>& polyWorld : holePolysWorld) {
+        if (polyWorld.size() < 3) {
+            continue;
+        }
+        QPolygonF local;
+        local.reserve(polyWorld.size());
+        for (const QPointF& w : polyWorld) {
+            local.append(QPointF(w.x() - ox, w.y() - oy));
+        }
+        painter.drawPolygon(local);
+    }
+    painter.end();
+}
+
 }  // namespace entity_cutout