Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/clVertexBuffer.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_CL_VERTEX_BUFFER_H
+#define OPENSUBDIV3_OSD_CL_VERTEX_BUFFER_H
+
+#include "../version.h"
+#include "../osd/opencl.h"
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+///
+/// \brief Concrete vertex buffer class for OpenCL subdivision.
+///
+/// CLVertexBuffer implements CLVertexBufferInterface. An instance of this
+/// buffer class can be passed to CLEvaluator
+///
+class CLVertexBuffer {
+
+public:
+    /// Creator. Returns NULL if error.
+    static CLVertexBuffer * Create(int numElements, int numVertices, cl_context clContext);
+
+    template <typename DEVICE_CONTEXT>
+    static CLVertexBuffer * Create(int numElements, int numVertices,
+                                   DEVICE_CONTEXT context) {
+        return Create(numElements, numVertices, context->GetContext());
+    }
+
+    /// Destructor.
+    ~CLVertexBuffer();
+
+    /// 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, cl_command_queue clQueue, 
+        cl_event* startEvents = NULL, unsigned int numStartEvents = 0, cl_event* endEvent = NULL);
+
+    template<typename DEVICE_CONTEXT>
+    void UpdateData(const float *src, int startVertex, int numVertices,
+                    DEVICE_CONTEXT context, 
+                    cl_event* startEvents = NULL, unsigned int numStartEvents = 0, cl_event* endEvent = NULL) {
+        UpdateData(src, startVertex, numVertices, context->GetCommandQueue(), startEvents, numStartEvents, endEvent);
+    }
+
+    /// 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 CL memory object.
+    cl_mem BindCLBuffer(cl_command_queue queue);
+
+protected:
+    /// Constructor.
+    CLVertexBuffer(int numElements, int numVertices, cl_context clContext);
+
+    /// Allocates CL memory for this buffer.
+    /// Returns true if success.
+    bool allocate(cl_context clContext);
+
+private:
+    int _numElements;
+    int _numVertices;
+    cl_mem _clMemory;
+};
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+}  // end namespace OpenSubdiv
+
+#endif  // OPENSUBDIV3_OSD_CL_VERTEX_BUFFER_H