vtkOpenGLRenderPass.h

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

#ifndef vtkOpenGLRenderPass_h
#define vtkOpenGLRenderPass_h

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

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

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

class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO 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);

  virtual void PreRenderProp(vtkProp* prop);

  void PostRender(const vtkRenderState* s);

  virtual void PostRenderProp(vtkProp* prop);

  unsigned int ActiveDrawBuffers = 0;

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

VTK_ABI_NAMESPACE_END
#endif // vtkOpenGLRenderPass_h