Add Chromium-only Blender WebEngine parity work

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

@@ -0,0 +1,89 @@
+//
+//   Copyright 2021 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_REGULAR_PATCH_BUILDER_H
+#define OPENSUBDIV3_REGULAR_PATCH_BUILDER_H
+
+#include "../version.h"
+
+#include "../bfr/faceSurface.h"
+#include "../far/patchDescriptor.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Bfr {
+
+//
+//  RegularPatchBuilder ...
+//
+class RegularPatchBuilder {
+public:
+    typedef FaceSurface::Index Index;
+
+public:
+    RegularPatchBuilder(FaceSurface const & surfaceDescription);
+    ~RegularPatchBuilder() { }
+
+    //  Debugging...
+    void print(Index const cvIndices[] = 0) const;
+
+public:
+    //  Methods to query the number and indices of control vertices:
+    int GetNumControlVertices() const { return _patchSize; }
+
+    int GatherControlVertexIndices(Index cvIndices[]) const;
+
+public:
+    //  Methods to query patch properties:
+    bool IsQuadPatch() const { return _isQuad; }
+    bool IsBoundaryPatch() const { return _isBoundary; }
+
+    Far::PatchDescriptor::Type GetPatchType() const { return _patchType; }
+
+    //  Note the bit-mask here is specific for use with Far::PatchParam
+    int GetPatchParamBoundaryMask() const { return _boundaryMask; }
+
+public:
+    //  Static methods for use without a FaceSurface:
+    static int GetPatchSize(int regFaceSize) {
+        return (regFaceSize == 4) ? 16 : 12;
+    }
+    static Far::PatchDescriptor::Type GetPatchType(int regFaceSize) {
+        return (regFaceSize == 4) ? Far::PatchDescriptor::REGULAR :
+                                    Far::PatchDescriptor::LOOP;
+    }
+    static int GetBoundaryMask(int regFaceSize, Index const patchPoints[]);
+
+private:
+    //  Internal methods for assembling quad and tri patches:
+    void gatherInteriorPatchPoints4(Index cvIndices[]) const;
+    void gatherBoundaryPatchPoints4(Index cvIndices[]) const;
+
+    void gatherInteriorPatchPoints3(Index cvIndices[]) const;
+    void gatherBoundaryPatchPoints3(Index cvIndices[]) const;
+
+private:
+    //  Private members:
+    FaceSurface const & _surface;
+
+    unsigned int _isQuad     : 1;
+    unsigned int _isBoundary : 1;
+    int          _boundaryMask;
+    int          _patchSize;
+
+    Far::PatchDescriptor::Type _patchType;
+};
+
+} // end namespace Bfr
+
+} // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+} // end namespace OpenSubdiv
+
+#endif /* OPENSUBDIV3_REGULAR_PATCH_BUILDER_H */