Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/bfr/faceVertexSubset.h

@@ -0,0 +1,81 @@
+//
+//   Copyright 2021 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_BFR_FACE_VERTEX_SUBSET_H
+#define OPENSUBDIV3_BFR_FACE_VERTEX_SUBSET_H
+
+#include "../version.h"
+
+#include "../bfr/vertexTag.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Bfr {
+
+//
+//  FaceVertexSubset is a simple struct and companion of FaceVertex that
+//  identifies a subset of the topology around a corner.  Such subsets are
+//  what ultimately define the limit surface around a face and so are used
+//  by higher level classes in conjunction with FaceVertex.
+//
+//  WIP - this is simple enough to warrant a nested class in FaceVertex
+//      - it serves no purpose without a FaceVertex and the FaceVertex
+//        class has several methods to initialize/modify FaceVertexSubsets
+//
+struct FaceVertexSubset {
+    FaceVertexSubset() { }
+
+    void Initialize(VertexTag tag) {
+        _tag = tag;
+        _numFacesBefore = 0;
+        _numFacesAfter  = 0;
+        _numFacesTotal  = 1;
+        _localSharpness = 0.0f;
+    }
+
+    //  Queries consistent with other classes:
+    VertexTag GetTag() const { return _tag; }
+
+    int GetNumFaces() const { return _numFacesTotal; }
+
+    //  Simple get/set methods to avoid the tedious syntax of the tag:
+    bool IsBoundary() const { return _tag._boundaryVerts; }
+    bool IsSharp()    const { return _tag._infSharpVerts; }
+
+    void SetBoundary(bool on) { _tag._boundaryVerts = on; }
+    void SetSharp(bool on)    { _tag._infSharpVerts = on; }
+
+    //  Methods comparing to a superset (not any arbitrary subset):
+    bool ExtentMatchesSuperset(FaceVertexSubset const & sup) const {
+        return (GetNumFaces() == sup.GetNumFaces()) &&
+               (IsBoundary()  == sup.IsBoundary());
+    }
+    bool ShapeMatchesSuperset(FaceVertexSubset const & sup) const {
+        return ExtentMatchesSuperset(sup) &&
+               (IsSharp() == sup.IsSharp());
+    }
+
+    //  Member tags containing boundary and sharp bits:
+    VertexTag _tag;
+
+    //  Members defining the extent of the subset:
+    short _numFacesBefore;
+    short _numFacesAfter;
+    short _numFacesTotal;
+
+    //  Member to override vertex sharpness (rarely used):
+    float _localSharpness;
+};
+
+} // end namespace Bfr
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_BFR_FACE_VERTEX_SUBSET_H */