Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/examples/common/mtlControlMeshDisplay.h

@@ -0,0 +1,45 @@
+//
+//   Copyright 2015 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV_EXAMPLES_MTL_CONTROL_MESH_DISPLAY_H
+#define OPENSUBDIV_EXAMPLES_MTL_CONTROL_MESH_DISPLAY_H
+
+#include <Metal/Metal.h>
+#include <opensubdiv/far/topologyLevel.h>
+
+class MTLControlMeshDisplay {
+public:
+    MTLControlMeshDisplay(id<MTLDevice> device, MTLRenderPipelineDescriptor* pipelineDescriptor);
+    ~MTLControlMeshDisplay() = default;
+
+    void Draw(id<MTLRenderCommandEncoder> encoder, 
+    		  id<MTLBuffer> vertexBuffer,
+              const float *modelViewProjectionMatrix);
+
+    void SetTopology(OpenSubdiv::Far::TopologyLevel const &level);
+
+    bool GetEdgesDisplay() const { return _displayEdges; }
+    void SetEdgesDisplay(bool display) { _displayEdges = display; }
+    bool GetVerticesDisplay() const { return _displayVertices; }
+    void SetVerticesDisplay(bool display) { _displayVertices = display; }
+
+private:
+    bool createProgram(MTLRenderPipelineDescriptor* pipelineDescriptor);
+
+    id<MTLDevice> _device;
+
+    bool _displayEdges;
+    bool _displayVertices;
+
+    int _numEdges, _numPoints;
+    id<MTLRenderPipelineState> _renderPipelineState;
+    id<MTLBuffer> _vertexSharpnessBuffer;
+    id<MTLBuffer> _edgeSharpnessBuffer;
+    id<MTLBuffer> _edgeIndicesBuffer;
+};
+
+#endif  // OPENSUBDIV_EXAMPLES_MTL_CONTROL_MESH_DISPLAY_H