VTK  9.1.0
vtkOpenGLVolumeLookupTable.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkOpenGLVolumeLookupTable.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
15 /*=============================================================================
16 Copyright and License information
17 =============================================================================*/
24 #ifndef vtkOpenGLVolumeLookupTable_h
25 #define vtkOpenGLVolumeLookupTable_h
26 #ifndef __VTK_WRAP__
27 
28 #include "vtkObject.h"
29 #include "vtkRenderingVolumeOpenGL2Module.h" // For export macro
30 
31 // Forward declarations
33 class vtkTextureObject;
34 class vtkWindow;
35 
36 class VTKRENDERINGVOLUMEOPENGL2_EXPORT vtkOpenGLVolumeLookupTable : public vtkObject
37 {
38 public:
40  void PrintSelf(ostream& os, vtkIndent indent) override;
41 
42  // static vtkOpenGLVolumeLookupTable* New();
43 
48 
53  void Activate();
54  void Deactivate();
56 
61 
66 
70  virtual void Update(vtkObject* func, double scalarRange[2], int blendMode, double sampleDistance,
71  double unitDistance, int filterValue, vtkOpenGLRenderWindow* renWin);
72 
76  vtkGetMacro(TextureHeight, int);
77 
81  vtkGetMacro(TextureWidth, int);
82 
83 protected:
86 
87  double LastRange[2] = { 0.0, 0.0 };
88  float* Table = nullptr;
89  int LastInterpolation = -1;
90  int NumberOfColorComponents = 1;
91  int TextureWidth = 1024;
92  int TextureHeight = 1;
93  vtkTextureObject* TextureObject = nullptr;
95 
99  virtual bool NeedsUpdate(
100  vtkObject* func, double scalarRange[2], int blendMode, double sampleDistance);
101 
105  virtual void InternalUpdate(
106  vtkObject* func, int blendMode, double sampleDistance, double unitDistance, int filterValue);
107 
112  vtkObject* func, int& width, int& height, vtkOpenGLRenderWindow* renWin);
113 
117  virtual void AllocateTable();
118 
119 private:
121  void operator=(const vtkOpenGLVolumeLookupTable&) = delete;
122 };
123 
124 #endif //__VTK_WRAP__
125 #endif // vtkOpenGLVolumeLookupTable_h
a simple class to control print indentation
Definition: vtkIndent.h:34
abstract base class for most VTK objects
Definition: vtkObject.h:63
OpenGL rendering window.
Base class for OpenGL texture management of scalar color, opacity and gradient opacity lookup tables.
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
virtual void ComputeIdealTextureSize(vtkObject *func, int &width, int &height, vtkOpenGLRenderWindow *renWin)
Compute ideal width and height for the texture based on function provided.
virtual void InternalUpdate(vtkObject *func, int blendMode, double sampleDistance, double unitDistance, int filterValue)
Internal method to actually update the texture object.
virtual bool NeedsUpdate(vtkObject *func, double scalarRange[2], int blendMode, double sampleDistance)
Test whether the internal function needs to be updated.
int GetMaximumSupportedTextureWidth(vtkOpenGLRenderWindow *renWin, int idealWidth)
Get the maximum supported texture width for the target OpenGL environment.
virtual void AllocateTable()
Allocate internal data table.
void ReleaseGraphicsResources(vtkWindow *window)
Release graphics resources.
void Deactivate()
Activate / deactivate the internal texture object.
~vtkOpenGLVolumeLookupTable() override
int GetTextureUnit()
Get the texture unit associated with the managed texture object.
void Activate()
Activate / deactivate the internal texture object.
vtkOpenGLVolumeLookupTable()=default
virtual void Update(vtkObject *func, double scalarRange[2], int blendMode, double sampleDistance, double unitDistance, int filterValue, vtkOpenGLRenderWindow *renWin)
Update the internal texture object using the transfer function provided.
abstracts an OpenGL texture object.
record modification and/or execution time
Definition: vtkTimeStamp.h:33
window superclass for vtkRenderWindow
Definition: vtkWindow.h:39
@ height
Definition: vtkX3D.h:260