Medical Imaging Interaction Toolkit  2016.11.0
Medical Imaging Interaction Toolkit
Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members
vtkNeverTranslucentTexture Class Reference

VTK Fix to speed up our image rendering. More...

#include <vtkNeverTranslucentTexture.h>

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Public Member Functions

 vtkTypeMacro (vtkNeverTranslucentTexture, vtkTexture)
 
void PrintSelf (ostream &os, vtkIndent indent) override
 
virtual int IsTranslucent () override
 The FIX (see class description). More...
 

Static Public Member Functions

static vtkNeverTranslucentTexture * New ()
 

Protected Member Functions

 vtkNeverTranslucentTexture ()
 

Detailed Description

VTK Fix to speed up our image rendering.

The way we render images while changing the contrast via level/window extremely slows down rendering.

The cause of this slowdown is that VTK asks a texture (via a call to IsTranslucent) if it is translucent. When the texture refers to a lookup table this question is answered in a most expensive way: pushing every pixel through the lookup table to see whether it would render translucent.

We can speed this up extremely by always answering NO. 2D Image rendering in the context of MITK is still correct.

This class is injected into the VTK system by registering it with vtkObjectFactory as a replacement for vtkTexture.

We chose vtkOpenGLTexture as super class, because it seems that the other texture super class is deprecated: http://www.cmake.org/Wiki/VTK:How_I_mangled_Mesa

See also
ImageVtkMapper2D

Definition at line 53 of file vtkNeverTranslucentTexture.h.

Constructor & Destructor Documentation

vtkNeverTranslucentTexture::vtkNeverTranslucentTexture ( )
protected

Definition at line 25 of file vtkNeverTranslucentTexture.cpp.

Member Function Documentation

int vtkNeverTranslucentTexture::IsTranslucent ( )
overridevirtual

The FIX (see class description).

VTK Description: Is this Texture Translucent?

Returns false (0) if the texture is either fully opaque or has only fully transparent pixels and fully opaque pixels and the Interpolate flag is turn off.

Definition at line 29 of file vtkNeverTranslucentTexture.cpp.

static vtkNeverTranslucentTexture* vtkNeverTranslucentTexture::New ( )
static

Referenced by mitk::PlaneGeometryDataVtkMapper3D::ProcessNode().

void vtkNeverTranslucentTexture::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
override

Definition at line 34 of file vtkNeverTranslucentTexture.cpp.

vtkNeverTranslucentTexture::vtkTypeMacro ( vtkNeverTranslucentTexture  ,
vtkTexture   
)
The documentation for this class was generated from the following files: