vtkOpenGLRenderPass.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkOpenGLRenderPass.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

#ifndef vtkOpenGLRenderPass_h
#define vtkOpenGLRenderPass_h

#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkRenderPass.h"

#include <string> // For std::string

class vtkAbstractMapper;
class vtkInformationObjectBaseVectorKey;
class vtkProp;
class vtkShaderProgram;
class vtkOpenGLVertexArrayObject;

class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLRenderPass: public vtkRenderPass
{
public:
  vtkTypeMacro(vtkOpenGLRenderPass, vtkRenderPass)
  void PrintSelf(ostream &os, vtkIndent indent) override;

  virtual bool PreReplaceShaderValues(std::string &vertexShader,
                                   std::string &geometryShader,
                                   std::string &fragmentShader,
                                   vtkAbstractMapper *mapper,
                                   vtkProp *prop);

  virtual bool PostReplaceShaderValues(std::string &vertexShader,
                                   std::string &geometryShader,
                                   std::string &fragmentShader,
                                   vtkAbstractMapper *mapper,
                                   vtkProp *prop);

  virtual bool SetShaderParameters(vtkShaderProgram *program,
                                   vtkAbstractMapper *mapper, vtkProp *prop,
                                   vtkOpenGLVertexArrayObject *VAO = nullptr);

  virtual vtkMTimeType GetShaderStageMTime();

  static vtkInformationObjectBaseVectorKey *RenderPasses();

  vtkSetMacro(ActiveDrawBuffers, unsigned int);
  vtkGetMacro(ActiveDrawBuffers, unsigned int);

protected:
  vtkOpenGLRenderPass();
  ~vtkOpenGLRenderPass() override;

  void PreRender(const vtkRenderState *s);

  void PostRender(const vtkRenderState *s);

  unsigned int ActiveDrawBuffers = 0;

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

#endif // vtkOpenGLRenderPass_h