vtkOpenGLCellGridRenderRequest.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkOpenGLCellGridRenderRequest_h
#define vtkOpenGLCellGridRenderRequest_h
#include "vtkCellGridQuery.h"
#include "vtkRenderingCellGridModule.h" // For export macro
#include "vtkStringToken.h"             // for ivars
 
#include <memory>        // for unique_ptr
#include <unordered_map> // for this->State
 
VTK_ABI_NAMESPACE_BEGIN
class vtkActor;
class vtkOpenGLCellGridMapper;
class vtkRenderer;
class vtkWindow;
 
class VTKRENDERINGCELLGRID_EXPORT vtkOpenGLCellGridRenderRequest : public vtkCellGridQuery
{
public:
  class StateBase
  {
  public:
    virtual ~StateBase() = default;
  };
 
  enum RenderableGeometry : unsigned char
  {
    VERTICES = 1,
    EDGES = 2,
    FACES = 4,
    VOLUMES = 8,
    SURFACE_WITH_EDGES = EDGES | FACES,
    ALL = VERTICES | EDGES | FACES | VOLUMES
  };
 
  vtkTypeMacro(vtkOpenGLCellGridRenderRequest, vtkCellGridQuery);
  static vtkOpenGLCellGridRenderRequest* New();
  void PrintSelf(std::ostream& os, vtkIndent indent) override;
 
  virtual void SetMapper(vtkOpenGLCellGridMapper* mapper);
  vtkGetObjectMacro(Mapper, vtkOpenGLCellGridMapper);
 
  virtual void SetActor(vtkActor* actor);
  vtkGetObjectMacro(Actor, vtkActor);
 
  virtual void SetRenderer(vtkRenderer* renderer);
  vtkGetObjectMacro(Renderer, vtkRenderer);
 
  virtual void SetWindow(vtkWindow* window);
  vtkGetObjectMacro(Window, vtkWindow);
 
  vtkGetMacro(ShapesToDraw, char);
  vtkSetClampMacro(ShapesToDraw, char, 1, 9);
 
  void Initialize() override;
  void Finalize() override;
 
  vtkGetMacro(IsReleasingResources, bool);
  vtkSetMacro(IsReleasingResources, bool);
 
  template <typename StateType>
  StateType* GetState(vtkStringToken cellType)
  {
    auto it = this->State.find(cellType);
    if (it == this->State.end())
    {
      it = this->State.insert(std::make_pair(cellType, std::unique_ptr<StateBase>(new StateType)))
             .first;
    }
    return static_cast<StateType*>(it->second.get());
  }
 
protected:
  vtkOpenGLCellGridRenderRequest();
  ~vtkOpenGLCellGridRenderRequest() override;
 
  vtkOpenGLCellGridMapper* Mapper{ nullptr };
  vtkActor* Actor{ nullptr };
  vtkRenderer* Renderer{ nullptr };
  vtkWindow* Window{ nullptr };
  bool IsReleasingResources{ false };
  char ShapesToDraw{ RenderableGeometry::ALL };
  std::unordered_map<vtkStringToken, std::unique_ptr<StateBase>> State;
 
private:
  vtkOpenGLCellGridRenderRequest(const vtkOpenGLCellGridRenderRequest&) = delete;
  void operator=(const vtkOpenGLCellGridRenderRequest&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkOpenGLCellGridRenderRequest_h