Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/vtr/triRefinement.h

@@ -0,0 +1,90 @@
+//
+//   Copyright 2014 DreamWorks Animation LLC.
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+#ifndef OPENSUBDIV3_VTR_TRI_REFINEMENT_H
+#define OPENSUBDIV3_VTR_TRI_REFINEMENT_H
+
+#include "../version.h"
+
+#include "../vtr/refinement.h"
+
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Vtr {
+namespace internal {
+
+//
+//  TriRefinement:
+//      A TriRefinement is a subclass of Refinement that splits all faces into tris.
+//  It provides the configuration of parent-to-child components and the population of
+//  all required topological relations in order to complete a valid Refinement.
+//
+class TriRefinement : public Refinement {
+
+public:
+    TriRefinement(Level const & parent, Level & child, Sdc::Options const & options);
+    ~TriRefinement();
+
+protected:
+    //
+    //  Virtual methods to complete the configuration of the parent-to-child mapping:
+    //
+    virtual void allocateParentChildIndices();
+
+    virtual void markSparseFaceChildren();
+
+    //
+    //  Virtual methods to populate the six topological relations:
+    //
+    virtual void populateFaceVertexRelation();
+    virtual void populateFaceEdgeRelation();
+    virtual void populateEdgeVertexRelation();
+    virtual void populateEdgeFaceRelation();
+    virtual void populateVertexFaceRelation();
+    virtual void populateVertexEdgeRelation();
+
+    //
+    //  Internal helper methods for populating the topology -- a few of these are
+    //  identical to what is used for quad-splitting, so we may move them to the
+    //  base class...
+    //
+    void populateFaceVertexCountsAndOffsets();
+    void populateFaceVerticesFromParentFaces();
+
+    void populateFaceEdgesFromParentFaces();
+
+    void populateEdgeVerticesFromParentFaces();
+    void populateEdgeVerticesFromParentEdges();
+
+    void populateEdgeFacesFromParentFaces();
+    void populateEdgeFacesFromParentEdges();
+
+    void populateVertexFacesFromParentEdges();
+    void populateVertexFacesFromParentVertices();
+
+    void populateVertexEdgesFromParentEdges();
+    void populateVertexEdgesFromParentVertices();
+
+private:
+    //
+    //  Unlike the quad-split, which can share some vectors with the parent Level since
+    //  child components correspond to face-vertices, the tri-split must define its
+    //  own local vectors to identify the children for each parent component -- to
+    //  be referenced within the base class for more immediate/inline access:
+    //
+    IndexVector _localFaceChildFaceCountsAndOffsets;
+};
+
+} // end namespace internal
+} // end namespace Vtr
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_VTR_REFINEMENT_H */