VTK  9.2.5
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/*=============================================================================
16Copyright and License information
17=============================================================================*/
24#ifndef vtkOpenGLVolumeLookupTable_h
25#define vtkOpenGLVolumeLookupTable_h
26
27#include "vtkObject.h"
28#include "vtkRenderingVolumeOpenGL2Module.h" // For export macro
29
30// Forward declarations
33class vtkWindow;
34
35class VTKRENDERINGVOLUMEOPENGL2_EXPORT vtkOpenGLVolumeLookupTable : public vtkObject
36{
37public:
39 void PrintSelf(ostream& os, vtkIndent indent) override;
40
41 // static vtkOpenGLVolumeLookupTable* New();
42
47
52 void Activate();
53 void Deactivate();
55
60
65
69 virtual void Update(vtkObject* func, double scalarRange[2], int blendMode, double sampleDistance,
70 double unitDistance, int filterValue, vtkOpenGLRenderWindow* renWin);
71
75 vtkGetMacro(TextureHeight, int);
76
80 vtkGetMacro(TextureWidth, int);
81
82protected:
85
86 double LastRange[2] = { 0.0, 0.0 };
87 float* Table = nullptr;
88 int LastInterpolation = -1;
89 int NumberOfColorComponents = 1;
90 int TextureWidth = 1024;
91 int TextureHeight = 1;
92 vtkTextureObject* TextureObject = nullptr;
94
98 virtual bool NeedsUpdate(
99 vtkObject* func, double scalarRange[2], int blendMode, double sampleDistance);
100
104 virtual void InternalUpdate(
105 vtkObject* func, int blendMode, double sampleDistance, double unitDistance, int filterValue);
106
111 vtkObject* func, int& width, int& height, vtkOpenGLRenderWindow* renWin);
112
116 virtual void AllocateTable();
117
118private:
120 void operator=(const vtkOpenGLVolumeLookupTable&) = delete;
121};
122
123#endif // vtkOpenGLVolumeLookupTable_h
a simple class to control print indentation
Definition: vtkIndent.h:40
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:36
window superclass for vtkRenderWindow
Definition: vtkWindow.h:39