pluginRenderDelegateUniqueHandle.h

//
// Copyright 2020 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_PLUGIN_RENDER_DELEGATE_UNIQUE_HANDLE_H
#define PXR_IMAGING_HD_PLUGIN_RENDER_DELEGATE_UNIQUE_HANDLE_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/rendererPluginHandle.h"
 
#include <cstddef>
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdRenderDelegate;
 
class HdPluginRenderDelegateUniqueHandle final
{
public:
    HdPluginRenderDelegateUniqueHandle() : _delegate(nullptr) { }
    HdPluginRenderDelegateUniqueHandle(const std::nullptr_t &)
      : _delegate(nullptr) { }
 
    HD_API
    HdPluginRenderDelegateUniqueHandle(HdPluginRenderDelegateUniqueHandle &&);
 
    HD_API
    ~HdPluginRenderDelegateUniqueHandle();
 
    HD_API
    HdPluginRenderDelegateUniqueHandle &operator=(
        HdPluginRenderDelegateUniqueHandle &&);
 
    HD_API
    HdPluginRenderDelegateUniqueHandle &operator=(
        const std::nullptr_t &);
 
    HdRenderDelegate *Get() const { return _delegate; }
 
    HdRenderDelegate *operator->() const { return _delegate; }
    HdRenderDelegate &operator*() const { return *_delegate; }
 
    explicit operator bool() const { return _delegate; }
 
    HD_API
    TfToken GetPluginId() const;
 
private:
    friend class HdRendererPlugin;
 
    HdPluginRenderDelegateUniqueHandle(
        const HdRendererPluginHandle &plugin, HdRenderDelegate * delegate)
        : _plugin(plugin), _delegate(delegate) { }
 
    HdRendererPluginHandle _plugin;
    HdRenderDelegate *_delegate;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif