vtkValuePass.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkValuePass_h
#define vtkValuePass_h
 
#include "vtkOpenGLRenderPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkSmartPointer.h"           //for ivar
#include "vtkWrappingHints.h"          // For VTK_MARSHALAUTO
 
VTK_ABI_NAMESPACE_BEGIN
class vtkAbstractArray;
class vtkActor;
class vtkDataArray;
class vtkDataObject;
class vtkFloatArray;
class vtkMapper;
class vtkOpenGLVertexArrayObject;
class vtkProperty;
class vtkRenderer;
class vtkRenderWindow;
class vtkShaderProgram;
 
class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO vtkValuePass : public vtkOpenGLRenderPass
{
public:
  enum Mode
  {
    INVERTIBLE_LUT = 1,
    FLOATING_POINT = 2
  };
 
  static vtkValuePass* New();
  vtkTypeMacro(vtkValuePass, vtkOpenGLRenderPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void SetInputArrayToProcess(int fieldAssociation, const char* name);
  void SetInputArrayToProcess(int fieldAssociation, int fieldId);
  void SetInputComponentToProcess(int component);

  void Render(const vtkRenderState* s) override;

  vtkFloatArray* GetFloatImageDataArray(vtkRenderer* ren);

  void GetFloatImageData(int format, int width, int height, void* data);

  int* GetFloatImageExtents();
 
  void ReleaseGraphicsResources(vtkWindow* win) override;
 
protected:
  vtkValuePass();
  ~vtkValuePass() override;



  bool PostReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
    std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;
  bool SetShaderParameters(vtkShaderProgram* program, vtkAbstractMapper* mapper, vtkProp* prop,
    vtkOpenGLVertexArrayObject* VAO = nullptr) override;
  vtkMTimeType GetShaderStageMTime() override;

  void BeginPass(vtkRenderer* ren);

  void EndPass();

  void RenderOpaqueGeometry(const vtkRenderState* s);

  void RenderPieceFinish();

  void RenderPieceStart(vtkDataArray* dataArr, vtkMapper* m);

  void BeginMapperRender(vtkMapper* mapper, vtkDataArray* dataArray, vtkProperty* property);

  void EndMapperRender(vtkMapper* mapper, vtkProperty* property);
 
  void InitializeBuffers(vtkRenderer* ren);

  bool UpdateShaders(std::string& VSSource, std::string& FSSource);

  void BindAttributes(vtkShaderProgram* prog, vtkOpenGLVertexArrayObject* VAO);
  void BindUniforms(vtkShaderProgram* prog);


  bool HasWindowSizeChanged(vtkRenderer* ren);
  bool InitializeFBO(vtkRenderer* ren);
  void ReleaseFBO(vtkWindow* win);
 
  class vtkInternalsFloat;
  vtkInternalsFloat* ImplFloat;
 
  class vtkInternalsInvertible;
  vtkInternalsInvertible* ImplInv;
 
  struct Parameters;
  Parameters* PassState;
 
  int RenderingMode;
 
private:
  vtkDataArray* GetCurrentArray(vtkMapper* mapper, Parameters* arrayPar);
 
  vtkAbstractArray* GetArrayFromCompositeData(vtkMapper* mapper, Parameters* arrayPar);
 
  vtkSmartPointer<vtkAbstractArray> MultiBlocksArray;
 
  void PopulateCellCellMap(const vtkRenderState* s);
 
  vtkValuePass(const vtkValuePass&) = delete;
  void operator=(const vtkValuePass&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif