Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/far/ptexIndices.h

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+//
+//   Copyright 2015 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+#ifndef OPENSUBDIV3_FAR_PTEX_INDICES_H
+#define OPENSUBDIV3_FAR_PTEX_INDICES_H
+
+#include "../version.h"
+
+#include "../far/topologyRefiner.h"
+#include "../far/types.h"
+
+#include <vector>
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Far {
+
+///
+/// \brief Object used to compute and query ptex face indices.
+///
+/// Given a refiner, constructing a PtexIndices object builds the mapping
+/// from coarse faces to ptex ids.  Once built, the object can be used to
+/// query the mapping.
+///
+class PtexIndices {
+
+public:
+
+    /// \brief Constructor
+    PtexIndices(TopologyRefiner const &refiner);
+
+    /// \brief Destructor
+    ~PtexIndices();
+
+    //@{
+    ///
+    /// Ptex
+    ///
+
+    /// \brief Returns the number of ptex faces in the mesh
+    ///
+    int GetNumFaces() const;
+
+    /// \brief Returns the ptex face index given a coarse face 'f' or -1
+    ///
+    int GetFaceId(Index f) const;
+
+    /// \brief Returns ptex face adjacency information for a given coarse face
+    ///
+    /// @param refiner   refiner used to build this PtexIndices object.
+    ///
+    /// @param face      coarse face index
+    ///
+    /// @param quadrant  quadrant index if 'face' is not a quad (the local ptex
+    ///                  sub-face index). Must be less than the number of face
+    ///                  vertices.
+    ///
+    /// @param adjFaces  ptex face indices of adjacent faces
+    ///
+    /// @param adjEdges  ptex edge indices of adjacent faces
+    ///
+    void GetAdjacency(
+        TopologyRefiner const &refiner,
+        int face, int quadrant,
+        int adjFaces[4], int adjEdges[4]) const;
+
+    //@}
+
+private:
+
+    void initializePtexIndices(TopologyRefiner const &refiner);
+
+private:
+
+    std::vector<Index> _ptexIndices;
+};
+
+
+} // end namespace Far
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_FAR_PTEX_INDICES_H */