vtkOpenGLRenderer.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkOpenGLRenderer.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 vtkOpenGLRenderer_h
#define vtkOpenGLRenderer_h
 
#include "vtkRenderer.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkSmartPointer.h"           // For vtkSmartPointer
#include <string>                      // Ivars
#include <vector>                      // STL Header
 
class vtkOpenGLFXAAFilter;
class vtkRenderPass;
class vtkOpenGLState;
class vtkOpenGLTexture;
class vtkOrderIndependentTranslucentPass;
class vtkTextureObject;
class vtkDepthPeelingPass;
class vtkPBRIrradianceTexture;
class vtkPBRLUTTexture;
class vtkPBRPrefilterTexture;
class vtkShaderProgram;
class vtkShadowMapPass;
 
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLRenderer : public vtkRenderer
{
public:
  static vtkOpenGLRenderer* New();
  vtkTypeMacro(vtkOpenGLRenderer, vtkRenderer);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void DeviceRender(void) override;
 
  void DeviceRenderOpaqueGeometry(vtkFrameBufferObjectBase* fbo = nullptr) override;
 
  void DeviceRenderTranslucentPolygonalGeometry(vtkFrameBufferObjectBase* fbo = nullptr) override;
 
  void Clear(void) override;
 
  int UpdateLights(void) override;
 
  int GetDepthPeelingHigherLayer();
 
  bool HaveApplePrimitiveIdBug();
 
  static bool HaveAppleQueryAllocationBug();
 
  bool IsDualDepthPeelingSupported();
 
  // Get the state object used to keep track of
  // OpenGL state
  vtkOpenGLState* GetState();
 
  // get the standard lighting uniform declarations
  // for the current set of lights
  const char* GetLightingUniforms();
 
  // update the lighting uniforms for this shader if they
  // are out of date
  void UpdateLightingUniforms(vtkShaderProgram* prog);
 
  // get the complexity of the current lights as a int
  // 0 = no lighting
  // 1 = headlight
  // 2 = directional lights
  // 3 = positional lights
  enum LightingComplexityEnum
  {
    NoLighting = 0,
    Headlight = 1,
    Directional = 2,
    Positional = 3
  };
  vtkGetMacro(LightingComplexity, int);
 
  // get the number of lights turned on
  vtkGetMacro(LightingCount, int);
 
 
  void SetUserLightTransform(vtkTransform* transform);
  vtkTransform* GetUserLightTransform();
 
 
  vtkPBRLUTTexture* GetEnvMapLookupTable();
  vtkPBRIrradianceTexture* GetEnvMapIrradiance();
  vtkPBRPrefilterTexture* GetEnvMapPrefiltered();
 
  void SetEnvironmentTexture(vtkTexture* texture, bool isSRGB = false) override;
 
  // Method to release graphics resources
  void ReleaseGraphicsResources(vtkWindow* w) override;
 
protected:
  vtkOpenGLRenderer();
  ~vtkOpenGLRenderer() override;
 
  void CheckCompilation(unsigned int fragmentShader);
 
  int UpdateGeometry(vtkFrameBufferObjectBase* fbo = nullptr) override;
 
  vtkTexture* GetCurrentTexturedBackground();
 
  friend class vtkOpenGLProperty;
  friend class vtkOpenGLTexture;
  friend class vtkOpenGLImageSliceMapper;
  friend class vtkOpenGLImageResliceMapper;
 
  vtkOpenGLFXAAFilter* FXAAFilter;
 
  vtkDepthPeelingPass* DepthPeelingPass;
 
  vtkOrderIndependentTranslucentPass* TranslucentPass;
 
  vtkShadowMapPass* ShadowMapPass;
 
  // Is rendering at translucent geometry stage using depth peeling and
  // rendering a layer other than the first one? (Boolean value)
  // If so, the uniform variables UseTexture and Texture can be set.
  // (Used by vtkOpenGLProperty or vtkOpenGLTexture)
  int DepthPeelingHigherLayer;
 
  friend class vtkRenderPass;
 
  std::string LightingDeclaration;
  int LightingComplexity;
  int LightingCount;
  vtkMTimeType LightingUpdateTime;
 
  vtkSmartPointer<vtkTransform> UserLightTransform;
 
  vtkPBRLUTTexture* EnvMapLookupTable;
  vtkPBRIrradianceTexture* EnvMapIrradiance;
  vtkPBRPrefilterTexture* EnvMapPrefiltered;
 
private:
  vtkOpenGLRenderer(const vtkOpenGLRenderer&) = delete;
  void operator=(const vtkOpenGLRenderer&) = delete;
};
 
#endif