Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/cudaVertexBuffer.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_CUDA_VERTEX_BUFFER_H
+#define OPENSUBDIV3_OSD_CUDA_VERTEX_BUFFER_H
+
+#include "../version.h"
+
+#include <cstddef>
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+/// \brief Concrete vertex buffer class for Cuda subdivision.
+///
+/// CudaVertexBuffer implements CudaVertexBufferInterface.
+/// An instance of this buffer class can be passed to CudaEvaluator
+///
+class CudaVertexBuffer {
+
+public:
+    /// Creator. Returns NULL if error.
+    static CudaVertexBuffer * Create(int numElements, int numVertices,
+                                     void *deviceContext = NULL);
+
+    /// Destructor.
+    ~CudaVertexBuffer();
+
+    /// 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 cuda memory.
+    float * BindCudaBuffer();
+
+protected:
+    /// Constructor.
+    CudaVertexBuffer(int numElements, int numVertices);
+
+    /// Allocates Cuda memory for this buffer.
+    /// Returns true if success.
+    bool allocate();
+
+private:
+    int _numElements;
+    int _numVertices;
+    void *_cudaMem;
+
+};
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+}  // end namespace OpenSubdiv
+
+#endif  // OPENSUBDIV3_OSD_CUDA_VERTEX_BUFFER_H