QVTKWebGPUWidget.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef QVTKWebGPUWidget_h
#define QVTKWebGPUWidget_h
 
#include <QWidget>
#include <memory> // for std::unique_ptr
 
#include "QVTKInteractor.h"              // needed for QVTKInteractor
#include "vtkGUISupportQtWebGPUModule.h" // for export macro
#include "vtkSmartPointer.h"             // needed for vtkSmartPointer
 
#include "vtk_wgpu.h" // for webgpu
 
VTK_ABI_NAMESPACE_BEGIN
class QVTKInteractor;
class QVTKInteractorAdapter;
class vtkWebGPURenderWindow;
 
class VTKGUISUPPORTQTWEBGPU_EXPORT QVTKWebGPUWidget : public QWidget
{
  Q_OBJECT
  typedef QWidget Superclass;
 
public:
  QVTKWebGPUWidget(QWidget* parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
  ~QVTKWebGPUWidget() override;

  vtkWebGPURenderWindow* renderWindow() const;

  QVTKInteractor* interactor() const;


  void setEnableHiDPI(bool enable);
  bool enableHiDPI() const { return this->EnableHiDPI; }


  void setUnscaledDPI(int dpi);
  int unscaledDPI() const { return this->UnscaledDPI; }


  void setCustomDevicePixelRatio(double cdpr);
  double customDevicePixelRatio() const { return this->CustomDevicePixelRatio; }
  double effectiveDevicePixelRatio() const;


  void setDefaultCursor(const QCursor& cursor);
  const QCursor& defaultCursor() const { return this->DefaultCursor; }
 
protected:
  void resizeEvent(QResizeEvent* event) override;
  void paintEvent(QPaintEvent* event) override;
  bool event(QEvent* evt) override;

  void initializeWebGPU();

  void createSurfaceDescriptor();

  void updateSize();
 
  vtkSmartPointer<vtkWebGPURenderWindow> RenderWindow;
  std::unique_ptr<QVTKInteractorAdapter> InteractorAdapter;
 
private:
  Q_DISABLE_COPY(QVTKWebGPUWidget);
 
  bool Initialized = false;
  bool InPaint = false;
  bool EnableHiDPI = true;
  int UnscaledDPI = 72;
  double CustomDevicePixelRatio = 0.0;
  QCursor DefaultCursor;
 
  // Platform-specific surface descriptor
  struct PlatformSurface;
  std::unique_ptr<PlatformSurface> Platform;
 
  wgpu::SurfaceDescriptor SurfaceDescriptor;
};
 
VTK_ABI_NAMESPACE_END
#endif