Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/cpuVertexBuffer.h

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+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H
+#define OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H
+
+#include "../version.h"
+
+#include <cstddef>
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+/// \brief Concrete vertex buffer class for CPU subdivision.
+///
+/// CpuVertexBuffer implements the VertexBufferInterface. An instance
+/// of this buffer class can be passed to CpuEvaluator
+///
+class CpuVertexBuffer {
+public:
+    /// Creator. Returns NULL if error.
+    static CpuVertexBuffer * Create(int numElements, int numVertices,
+                                    void *deviceContext = NULL);
+
+    /// Destructor.
+    ~CpuVertexBuffer();
+
+    /// This method is meant to be used in client code in order to provide
+    /// coarse vertices data to Osd.
+    void UpdateData(const float *src, int startVertex, int numVertices,
+                    void *deviceContext = NULL);
+
+    /// Returns how many elements defined in this vertex buffer.
+    int GetNumElements() const;
+
+    /// Returns how many vertices allocated in this vertex buffer.
+    int GetNumVertices() const;
+
+    /// Returns the address of CPU buffer
+    float * BindCpuBuffer();
+
+protected:
+    /// Constructor.
+    CpuVertexBuffer(int numElements, int numVertices);
+
+private:
+    int _numElements;
+    int _numVertices;
+    float *_cpuBuffer;
+};
+
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+}  // end namespace OpenSubdiv
+
+#endif  // OPENSUBDIV3_OSD_CPU_VERTEX_BUFFER_H