vtkSurfaceLICHelper.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkSurfaceLICHelper_h
#define vtkSurfaceLICHelper_h
 
#include "vtkOpenGLHelper.h"
#include "vtkPixelExtent.h"
#include "vtkRenderingLICOpenGL2Module.h" // for export
#include "vtkSmartPointer.h"
#include "vtkTextureObject.h"
#include "vtkWeakPointer.h"
#include "vtk_glew.h"
 
#include <deque> // for methods
 
VTK_ABI_NAMESPACE_BEGIN
class vtkOpenGLFramebufferObject;
class vtkOpenGLRenderWindow;
class vtkPainterCommunicator;
class vtkImageData;
class vtkSurfaceLICComposite;
class vtkLineIntegralConvolution2D;
class vtkRenderer;
class vtkActor;
class vtkDataObject;
 
class vtkSurfaceLICHelper
{
public:
  vtkSurfaceLICHelper();
  ~vtkSurfaceLICHelper();
 
  static bool IsSupported(vtkOpenGLRenderWindow* context);
 
  void ReleaseGraphicsResources(vtkWindow* win);
 
  void ClearTextures();
 
  void AllocateTextures(vtkOpenGLRenderWindow* context, int* viewsize);
 
  void AllocateTexture(vtkOpenGLRenderWindow* context, int* viewsize,
    vtkSmartPointer<vtkTextureObject>& tex, int filter = vtkTextureObject::Nearest);
 
  void AllocateDepthTexture(
    vtkOpenGLRenderWindow* context, int* viewsize, vtkSmartPointer<vtkTextureObject>& tex);
 
  void Updated();
 
  void UpdateAll();
 
 
  void ViewportQuadTextureCoords(GLfloat* tcoords)
  {
    tcoords[0] = tcoords[2] = 0.0f;
    tcoords[1] = tcoords[3] = 1.0f;
  }
 
  void ViewportQuadPoints(const vtkPixelExtent& viewportExt, GLfloat* quadpts)
  {
    viewportExt.GetData(quadpts);
  }
 
  void ViewportQuadTextureCoords(
    const vtkPixelExtent& viewExt, const vtkPixelExtent& viewportExt, GLfloat* tcoords);
 
 
  void ViewQuadPoints(GLfloat* quadpts)
  {
    quadpts[0] = quadpts[2] = 0.0f;
    quadpts[1] = quadpts[3] = 1.0f;
  }
 
 
  void ViewQuadTextureCoords(GLfloat* tcoords)
  {
    tcoords[0] = tcoords[2] = 0.0f;
    tcoords[1] = tcoords[3] = 1.0f;
  }
 
  void RenderQuad(
    const vtkPixelExtent& viewExt, const vtkPixelExtent& viewportExt, vtkOpenGLHelper* cbo);
 
  inline int idx(int row, int col) { return 4 * col + row; }
 
  bool VisibilityTest(double ndcBBox[24]);
 
  bool ProjectBounds(double PMV[16], int viewsize[2], double bounds[6], vtkPixelExtent& screenExt);
 
  int ProjectBounds(vtkRenderer* ren, vtkActor* actor, vtkDataObject* dobj, int viewsize[2],
    vtkPixelExtent& dataExt, std::deque<vtkPixelExtent>& blockExts);
 
  void GetPixelBounds(float* rgba, int ni, vtkPixelExtent& ext);
 
  void GetPixelBounds(float* rgba, int ni, std::deque<vtkPixelExtent>& blockExts);
 
  static void StreamingFindMinMax(
    vtkOpenGLFramebufferObject* fbo, std::deque<vtkPixelExtent>& blockExts, float& min, float& max);
 
  vtkSmartPointer<vtkImageData> Noise;
  vtkSmartPointer<vtkTextureObject> NoiseImage;
  vtkSmartPointer<vtkTextureObject> DepthImage;
  vtkSmartPointer<vtkTextureObject> GeometryImage;
  vtkSmartPointer<vtkTextureObject> VectorImage;
  vtkSmartPointer<vtkTextureObject> CompositeVectorImage;
  vtkSmartPointer<vtkTextureObject> MaskVectorImage;
  vtkSmartPointer<vtkTextureObject> CompositeMaskVectorImage;
  vtkSmartPointer<vtkTextureObject> LICImage;
  vtkSmartPointer<vtkTextureObject> RGBColorImage;
  vtkSmartPointer<vtkTextureObject> HSLColorImage;
 
  bool HasVectors;
  std::deque<vtkPixelExtent> BlockExts;
 
  vtkOpenGLHelper* ColorEnhancePass;
  vtkOpenGLHelper* CopyPass;
  vtkOpenGLHelper* ColorPass;
 
  int Viewsize[2];
  vtkSmartPointer<vtkSurfaceLICComposite> Compositor;
  vtkSmartPointer<vtkOpenGLFramebufferObject> FBO;
 
  vtkSmartPointer<vtkLineIntegralConvolution2D> LICer;
  vtkPainterCommunicator* Communicator;
  vtkPixelExtent DataSetExt;
 
  vtkWeakPointer<vtkOpenGLRenderWindow> Context;
 
  bool ContextNeedsUpdate;
  bool CommunicatorNeedsUpdate;
 
protected:
};
 
VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkSurfaceLICHelper.h