Add Chromium-only Blender WebEngine parity work

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

@@ -0,0 +1,66 @@
+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_OSD_MTL_VERTEX_BUFFER_H
+#define OPENSUBDIV3_OSD_MTL_VERTEX_BUFFER_H
+
+#include "../version.h"
+#include "../osd/mtlCommon.h"
+
+@protocol MTLDevice;
+@protocol MTLBuffer;
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+class CPUMTLVertexBuffer {
+public:
+    static CPUMTLVertexBuffer* Create(int numElements, int numVertices, MTLContext* context);
+
+    void UpdateData(const float* src, int startVertex, int numVertices, MTLContext* context);
+
+    int GetNumElements() const
+    {
+        return _numElements;
+    }
+
+    int GetNumVertices() const
+    {
+        return _numVertices;
+    }
+
+    float* BindCpuBuffer();
+    id<MTLBuffer> BindMTLBuffer(MTLContext* context);
+
+    id<MTLBuffer> BindVBO(MTLContext* context)
+    {
+        return BindMTLBuffer(context);
+    }
+
+protected:
+
+    CPUMTLVertexBuffer(int numElements, int numVertices);
+
+    bool allocate(MTLContext* context);
+
+private:
+    int _numElements;
+    int _numVertices;
+    id<MTLBuffer> _buffer;
+    bool _dirty;
+};
+
+} //end namespace Osd
+
+} //end namespace OPENSUBDIV_VERSION
+    using namespace OPENSUBDIV_VERSION;
+
+} //end namespace OpenSubdiv
+
+#endif // OPENSUBDIV3_OSD_MTL_VERTEX_BUFFER_H