internal: Wrap regions (#2750)

src/helpers/Region.hpp

@@ -0,0 +1,53 @@
+#pragma once
+#include <pixman.h>
+#include <vector>
+#include "Vector2D.hpp"
+
+struct wlr_box;
+
+class CRegion {
+  public:
+    /* Create an empty region */
+    CRegion();
+    /* Create from a reference. Copies, does not own. */
+    CRegion(pixman_region32_t* ref);
+    /* Create from a box */
+    CRegion(double x, double y, double w, double h);
+    /* Create from a wlr_box */
+    CRegion(wlr_box* box);
+
+    CRegion(const CRegion&);
+    CRegion(CRegion&&);
+
+    ~CRegion();
+
+    CRegion& operator=(CRegion&& other) {
+        pixman_region32_copy(&m_rRegion, other.pixman());
+        return *this;
+    }
+
+    CRegion& operator=(CRegion& other) {
+        pixman_region32_copy(&m_rRegion, other.pixman());
+        return *this;
+    }
+
+    CRegion&                    clear();
+    CRegion&                    set(const CRegion& other);
+    CRegion&                    add(const CRegion& other);
+    CRegion&                    add(double x, double y, double w, double h);
+    CRegion&                    subtract(const CRegion& other);
+    CRegion&                    intersect(const CRegion& other);
+    CRegion&                    intersect(double x, double y, double w, double h);
+    CRegion&                    translate(const Vector2D& vec);
+    CRegion&                    invert(pixman_box32_t* box);
+    bool                        empty();
+
+    std::vector<pixman_box32_t> getRects() const;
+
+    pixman_region32_t*          pixman() {
+        return &m_rRegion;
+    }
+
+  private:
+    pixman_region32_t m_rRegion;
+};