vtkOpenGLPointGaussianMapper.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkOpenGLPointGaussianMapper_h
#define vtkOpenGLPointGaussianMapper_h

#include "vtkPointGaussianMapper.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkWrappingHints.h"          // For VTK_MARSHALAUTO
#include <vector>                      // for ivar

VTK_ABI_NAMESPACE_BEGIN
class vtkOpenGLPointGaussianMapperHelper;
class vtkOverrideAttribute;

class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO vtkOpenGLPointGaussianMapper
  : public vtkPointGaussianMapper
{
public:
  static vtkOpenGLPointGaussianMapper* New();
  VTK_NEWINSTANCE
  static vtkOverrideAttribute* CreateOverrideAttributes();
  vtkTypeMacro(vtkOpenGLPointGaussianMapper, vtkPointGaussianMapper);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void ReleaseGraphicsResources(vtkWindow*) override;

  bool HasTranslucentPolygonalGeometry() override;

  void Render(vtkRenderer* ren, vtkActor* act) override;

  void ProcessSelectorPixelBuffers(
    vtkHardwareSelector* sel, std::vector<unsigned int>& pixeloffsets, vtkProp* prop) override;

protected:
  vtkOpenGLPointGaussianMapper();
  ~vtkOpenGLPointGaussianMapper() override;

  void ReportReferences(vtkGarbageCollector* collector) override;

  std::vector<vtkOpenGLPointGaussianMapperHelper*> Helpers;

  virtual vtkOpenGLPointGaussianMapperHelper* CreateHelper();
  virtual void CopyMapperValuesToHelper(vtkOpenGLPointGaussianMapperHelper* helper);

  vtkTimeStamp HelperUpdateTime;
  vtkTimeStamp ScaleTableUpdateTime;
  vtkTimeStamp OpacityTableUpdateTime;

  // unused
  void RenderPiece(vtkRenderer*, vtkActor*) override {}

  void RenderInternal(vtkRenderer*, vtkActor*);

  // create the table for opacity values
  void BuildOpacityTable();

  // create the table for scale values
  void BuildScaleTable();

  float* OpacityTable;  // the table
  double OpacityScale;  // used for quick lookups
  double OpacityOffset; // used for quick lookups
  float* ScaleTable;    // the table
  double ScaleScale;    // used for quick lookups
  double ScaleOffset;   // used for quick lookups

  vtkExecutive* CreateDefaultExecutive() override;

  int FillInputPortInformation(int port, vtkInformation* info) override;

  void ComputeBounds() override;

  // used by the hardware selector
  std::vector<std::vector<unsigned int>> PickPixels;

private:
  vtkOpenGLPointGaussianMapper(const vtkOpenGLPointGaussianMapper&) = delete;
  void operator=(const vtkOpenGLPointGaussianMapper&) = delete;
};

#define vtkOpenGLPointGaussianMapper_OVERRIDE_ATTRIBUTES                                           \
  vtkOpenGLPointGaussianMapper::CreateOverrideAttributes()
VTK_ABI_NAMESPACE_END
#endif