Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/cudaD3D11VertexBuffer.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_D3D11_VERTEX_BUFFER_H
+#define OPENSUBDIV3_OSD_CUDA_D3D11_VERTEX_BUFFER_H
+
+#include "../version.h"
+
+struct cudaGraphicsResource;
+
+struct ID3D11Buffer;
+struct ID3D11Device;
+struct ID3D11DeviceContext;
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Osd {
+
+/// \brief Concrete vertex buffer class for cuda subdivision and D3D11 drawing.
+///
+/// CudaD3D11VertexBuffer implements CudaVertexBufferInterface and
+/// D3D11VertexBufferInterface.
+///
+/// The buffer interop between Cuda and D3D is handled automatically when a 
+/// client calls BindCudaBuffer and BindVBO methods.
+///
+class CudaD3D11VertexBuffer {
+public:
+    /// Creator. Returns NULL if error.
+    static CudaD3D11VertexBuffer * Create(int numElements,
+                                          int numVertices,
+                                          ID3D11DeviceContext *deviceContext);
+
+    /// Destructor.
+    virtual ~CudaD3D11VertexBuffer();
+
+    /// 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*/);
+
+    /// 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. DX buffer will be mapped to cuda resource
+    /// if necessary.
+    float * BindCudaBuffer();
+
+    /// Returns the D3D11 buffer object.
+    ID3D11Buffer *BindD3D11Buffer(ID3D11DeviceContext *deviceContext);
+
+    /// Returns the D3D11 buffer object (for Osd::Mesh interface)
+    ID3D11Buffer *BindVBO(ID3D11DeviceContext *deviceContext) {
+        return BindD3D11Buffer(deviceContext);
+    }
+
+protected:
+    /// Constructor.
+    CudaD3D11VertexBuffer(int numElements, int numVertices);
+
+    bool allocate(ID3D11Device *device);
+
+    // Acquires a cuda resource from DX11
+    void map();
+
+    // Releases a cuda resource to DX11
+    void unmap();
+
+private:
+    int _numElements;
+    int _numVertices;
+    ID3D11Buffer *_d3d11Buffer;
+    void *_cudaBuffer;
+    cudaGraphicsResource *_cudaResource;
+};
+
+}  // end namespace Osd
+
+}  // end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+}  // end namespace OpenSubdiv
+
+#endif  // OPENSUBDIV3_OSD_CUDA_D3D11_VERTEX_BUFFER_H