Magic tool Object mode (Compositor 1.1.8)

src/Document/ObjectSelection.h

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+#pragma once
+#include <QImage>
+#include <QPainterPath>
+#include <optional>
+
+struct ObjectSelectionSettings {
+    // Read the visible composite rather than the active layer.
+    bool sampleAllLayers = true;
+    // Positive erodes the mask inward; negative grows it outward.
+    int edgeOffset = 0;
+    friend bool operator==(const ObjectSelectionSettings &, const ObjectSelectionSettings &) = default;
+};
+
+// Swift's ObjectSelection; U²-Net regions stand for Vision's instances.
+namespace ObjectSelection {
+// The model's grid the regions are found on.
+inline constexpr int grid = 320;
+// The outline in pixels; none off the image or background.
+std::optional<QPainterPath> select(const QImage &image, QPointF point, int edgeOffset, bool smoothEdges);
+// The binary grid's region holding the cell, else none.
+std::optional<std::vector<uchar>> region(const std::vector<uchar> &mask, int width, int height, int x, int y);
+// Swift's steps, a pixel ring each: erode inward, dilate outward.
+std::vector<uchar> adjusted(std::vector<uchar> mask, int width, int height, int edgeOffset);
+// Stair steps rounded off; winding and subpath order kept.
+QPainterPath smoothed(const QPainterPath &path);
+}