/usr/include/vtk-7.1/vtkSurfaceLICHelper.h is in libvtk7-dev 7.1.1+dfsg1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Program: Visualization Toolkit
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.
=========================================================================*/
/**
* @class vtkSurfaceLICHelper
*
* A small collection of noise routines for LIC
*/
#ifndef vtkSurfaceLICHelper_h
#define vtkSurfaceLICHelper_h
#include "vtkRenderingLICOpenGL2Module.h" // for export
#include "vtkPixelExtent.h"
#include "vtkWeakPointer.h"
#include "vtkSmartPointer.h"
#include "vtkOpenGLHelper.h"
#include "vtk_glew.h"
#include "vtkTextureObject.h"
#include <deque> // for methods
class vtkFrameBufferObject2;
class vtkOpenGLRenderWindow;
class vtkPainterCommunicator;
class vtkImageData;
class vtkSurfaceLICComposite;
class vtkLineIntegralConvolution2D;
class vtkRenderer;
class vtkActor;
class vtkDataObject;
class vtkSurfaceLICHelper
{
public:
vtkSurfaceLICHelper();
~vtkSurfaceLICHelper();
/**
* Check for OpenGL support
*/
static bool IsSupported(vtkOpenGLRenderWindow *context);
/**
* Free textures and shader programs we're holding a reference to.
*/
void ReleaseGraphicsResources(vtkWindow *win);
/**
* Free textures we're holding a reference to.
*/
void ClearTextures();
/**
* Allocate textures.
*/
void AllocateTextures(
vtkOpenGLRenderWindow *context,
int *viewsize);
/**
* Allocate a size texture, store in the given smart pointer.
*/
void AllocateTexture(
vtkOpenGLRenderWindow *context,
int *viewsize,
vtkSmartPointer<vtkTextureObject> &tex,
int filter = vtkTextureObject::Nearest);
/**
* Allocate a size texture, store in the given smart pointer.
*/
void AllocateDepthTexture(
vtkOpenGLRenderWindow *context,
int *viewsize,
vtkSmartPointer<vtkTextureObject> &tex);
/**
* After LIC has been computed reset/clean internal state
*/
void Updated();
/**
* Force all stages to re-execute. Necessary if the
* context or communicator changes.
*/
void UpdateAll();
//@{
/**
* Convert viewport to texture coordinates
*/
void ViewportQuadTextureCoords(GLfloat *tcoords)
{
tcoords[0] = tcoords[2] = 0.0f;
tcoords[1] = tcoords[3] = 1.0f;
}
//@}
/**
* Convert a viewport to a bounding box and it's texture coordinates for a
* screen size texture.
*/
void ViewportQuadPoints(const vtkPixelExtent &viewportExt, GLfloat *quadpts)
{
viewportExt.GetData(quadpts);
}
/**
* Convert a viewport to a bounding box and it's texture coordinates for a
* screen size texture.
*/
void ViewportQuadTextureCoords(
const vtkPixelExtent &viewExt,
const vtkPixelExtent &viewportExt,
GLfloat *tcoords);
//@{
/**
* Convert the entire view to a bounding box and it's texture coordinates for
* a screen size texture.
*/
void ViewQuadPoints(GLfloat *quadpts)
{
quadpts[0] = quadpts[2] = 0.0f;
quadpts[1] = quadpts[3] = 1.0f;
}
//@}
//@{
/**
* Convert the entire view to a bounding box and it's texture coordinates for
* a screen size texture.
*/
void ViewQuadTextureCoords(GLfloat *tcoords)
{
tcoords[0] = tcoords[2] = 0.0f;
tcoords[1] = tcoords[3] = 1.0f;
}
//@}
/**
* Render a quad (to trigger a shader to run)
*/
void RenderQuad(
const vtkPixelExtent &viewExt,
const vtkPixelExtent &viewportExt,
vtkOpenGLHelper *cbo);
/**
* Compute the index into the 4x4 OpenGL ordered matrix.
*/
inline int idx(int row, int col) { return 4*col+row; }
/**
* given a axes aligned bounding box in
* normalized device coordinates test for
* view frustum visibility.
* if all points are outside one of the
* view frustum planes then this box
* is not visible. we might have false
* positive where more than one clip
* plane intersects the box.
*/
bool VisibilityTest(double ndcBBox[24]);
/**
* Given world space bounds,
* compute bounding boxes in clip and normalized device
* coordinates and perform view frustum visiblity test.
* return true if the bounds are visible. If so the passed
* in extent object is initialized with the corresponding
* screen space extents.
*/
bool ProjectBounds(
double PMV[16],
int viewsize[2],
double bounds[6],
vtkPixelExtent &screenExt);
/**
* Compute screen space extents for each block in the input
* dataset and for the entire dataset. Only visible blocks
* are used in the computations.
*/
int ProjectBounds(
vtkRenderer *ren,
vtkActor *actor,
vtkDataObject *dobj,
int viewsize[2],
vtkPixelExtent &dataExt,
std::deque<vtkPixelExtent> &blockExts);
/**
* Shrink an extent to tightly bound non-zero values
*/
void GetPixelBounds(float *rgba, int ni, vtkPixelExtent &ext);
/**
* Shrink a set of extents to tightly bound non-zero values
* cull extent if it's empty
*/
void GetPixelBounds(float *rgba, int ni, std::deque<vtkPixelExtent> &blockExts);
static void StreamingFindMinMax(
vtkFrameBufferObject2 *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<vtkFrameBufferObject2> FBO;
vtkSmartPointer<vtkLineIntegralConvolution2D> LICer;
vtkPainterCommunicator *Communicator;
vtkPixelExtent DataSetExt;
vtkWeakPointer<vtkOpenGLRenderWindow> Context;
bool ContextNeedsUpdate;
bool CommunicatorNeedsUpdate;
protected:
};
#endif
// VTK-HeaderTest-Exclude: vtkSurfaceLICHelper.h
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