Add Chromium-only Blender WebEngine parity work

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

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+//
+//   Copyright 2017 DreamWorks Animation LLC.
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_FAR_LOOP_PATCH_BUILDER_H
+#define OPENSUBDIV3_FAR_LOOP_PATCH_BUILDER_H
+
+#include "../version.h"
+
+#include "../far/patchBuilder.h"
+
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Far {
+
+//
+//  LoopPatchBuilder
+//
+//  Declaration of PatchBuilder subclass supporting Sdc::SCHEME_LOOP.
+//  Required virtual methods are included, along with any customizations
+//  local to their implementation.
+//
+class LoopPatchBuilder : public PatchBuilder {
+public:
+    LoopPatchBuilder(TopologyRefiner const& refiner, Options const& options);
+    virtual ~LoopPatchBuilder();
+
+protected:
+    virtual PatchDescriptor::Type patchTypeFromBasis(BasisType basis) const;
+
+    virtual int convertToPatchType(SourcePatch const &   sourcePatch,
+                                   PatchDescriptor::Type patchType,
+                                   SparseMatrix<float> & matrix) const;
+    virtual int convertToPatchType(SourcePatch const &    sourcePatch,
+                                   PatchDescriptor::Type  patchType,
+                                   SparseMatrix<double> & matrix) const;
+private:
+    template <typename REAL>
+    int convertSourcePatch(SourcePatch const &   sourcePatch,
+                           PatchDescriptor::Type patchType,
+                           SparseMatrix<REAL> &  matrix) const;
+};
+
+} // end namespace Far
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_FAR_LOOP_PATCH_BUILDER_H */