Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/examples/glShareTopology/vbo.h

@@ -0,0 +1,111 @@
+//
+//   Copyright 2015 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_VBO_H
+#define OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_VBO_H
+
+#include "glLoader.h"
+
+#include <opensubdiv/osd/bufferDescriptor.h>
+
+#include <vector>
+
+template <class VERTEX_BUFFER, class DEVICE_CONTEXT>
+class VBO {
+public:
+    VBO(OpenSubdiv::Osd::BufferDescriptor const &vertexDesc,
+        OpenSubdiv::Osd::BufferDescriptor const &varyingDesc,
+        bool interleaved, int numVertices, DEVICE_CONTEXT *deviceContext) :
+        _vertexDesc(vertexDesc),
+        _varyingDesc(varyingDesc),
+        _numVertices(numVertices),
+        _vertexBuffer(NULL), _varyingBuffer(NULL), _interleaved(interleaved),
+        _deviceContext(deviceContext) {
+
+        if (interleaved) {
+            assert(vertexDesc.stride == varyingDesc.stride);
+            _vertexBuffer = createVertexBuffer(
+                vertexDesc.stride, numVertices);
+        } else {
+            if (vertexDesc.stride > 0) {
+                _vertexBuffer = createVertexBuffer(
+                    vertexDesc.stride, numVertices);
+            }
+            if (varyingDesc.stride > 0) {
+                _varyingBuffer = createVertexBuffer(
+                    varyingDesc.stride, numVertices);
+            }
+        }
+    }
+
+    ~VBO() {
+        delete _vertexBuffer;
+        delete _varyingBuffer;
+    }
+
+    OpenSubdiv::Osd::BufferDescriptor const &GetVertexDesc() const {
+        return _vertexDesc;
+    }
+    OpenSubdiv::Osd::BufferDescriptor const &GetVaryingDesc() const {
+        return _varyingDesc;
+    }
+
+    void UpdateVertexBuffer(int vertsOffset, std::vector<float> const &src) {
+        updateVertexBuffer(_vertexBuffer, &src[0], vertsOffset,
+                           (int)src.size()/_vertexBuffer->GetNumElements());
+    }
+    void UpdateVaryingBuffer(int vertsOffset, std::vector<float> const &src) {
+        updateVertexBuffer(_varyingBuffer, &src[0], vertsOffset,
+                           (int)src.size()/_varyingBuffer->GetNumElements());
+    }
+
+    GLuint BindVertexBuffer() {
+        return _vertexBuffer->BindVBO();
+    }
+
+    GLuint BindVaryingBuffer() {
+        return _varyingBuffer->BindVBO();
+    }
+
+    VERTEX_BUFFER *GetVertexBuffer() const {
+        return _vertexBuffer;
+    }
+
+    VERTEX_BUFFER *GetVaryingBuffer() const {
+        return _interleaved ? _vertexBuffer : _varyingBuffer;
+    }
+
+    size_t GetSize() const {
+        size_t size = _numVertices * _vertexDesc.stride;
+        if (_varyingBuffer) size += _numVertices * _varyingDesc.stride;
+        return size * sizeof(float);
+    }
+
+private:
+    VERTEX_BUFFER *createVertexBuffer(int numElements, int numVertices) {
+        return VERTEX_BUFFER::Create(numElements, numVertices, _deviceContext);
+    }
+
+    void updateVertexBuffer(VERTEX_BUFFER *vertexBuffer,
+                            const float *src, int startVertex,
+                            int numVertices) {
+        vertexBuffer->UpdateData(src, startVertex, numVertices, _deviceContext);
+    }
+
+    OpenSubdiv::Osd::BufferDescriptor _vertexDesc;
+    OpenSubdiv::Osd::BufferDescriptor _varyingDesc;
+
+    // # of vertices total, including both control verts and refined verts.
+    int _numVertices;
+
+    VERTEX_BUFFER *_vertexBuffer;
+    VERTEX_BUFFER *_varyingBuffer;
+    bool _interleaved;
+    DEVICE_CONTEXT *_deviceContext;
+};
+
+#endif  //  OPENSUBDIV_EXAMPLES_GL_SHARE_TOPOLOGY_VBO_H