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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLVolumeTransferFunction2D.cxx
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.
=========================================================================*/
#include "vtkOpenGLVolumeTransferFunction2D.h"
#include "vtkDataArray.h"
#include "vtkImageData.h"
#include "vtkImageResize.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkPointData.h"
#include "vtkTextureObject.h"
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkOpenGLVolumeTransferFunction2D);
//------------------------------------------------------------------------------
vtkOpenGLVolumeTransferFunction2D::vtkOpenGLVolumeTransferFunction2D()
{
this->NumberOfColorComponents = 4;
}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeTransferFunction2D::InternalUpdate(vtkObject* func, int vtkNotUsed(blendMode),
double vtkNotUsed(sampleDistance), double vtkNotUsed(unitDistance), int filterValue)
{
vtkImageData* transfer2D = vtkImageData::SafeDownCast(func);
if (!transfer2D)
{
return;
}
int* dims = transfer2D->GetDimensions();
// Resample if there is a size restriction
void* data = transfer2D->GetPointData()->GetScalars()->GetVoidPointer(0);
if (dims[0] != this->TextureWidth || dims[1] != this->TextureHeight)
{
this->ResizeFilter->SetInputData(transfer2D);
this->ResizeFilter->SetResizeMethodToOutputDimensions();
this->ResizeFilter->SetOutputDimensions(this->TextureWidth, this->TextureHeight, 1);
this->ResizeFilter->Update();
data = this->ResizeFilter->GetOutput()->GetPointData()->GetScalars()->GetVoidPointer(0);
}
this->TextureObject->SetWrapS(vtkTextureObject::ClampToEdge);
this->TextureObject->SetWrapT(vtkTextureObject::ClampToEdge);
this->TextureObject->SetMagnificationFilter(filterValue);
this->TextureObject->SetMinificationFilter(filterValue);
this->TextureObject->Create2DFromRaw(
this->TextureWidth, this->TextureHeight, this->NumberOfColorComponents, VTK_FLOAT, data);
}
//------------------------------------------------------------------------------
bool vtkOpenGLVolumeTransferFunction2D::NeedsUpdate(vtkObject* func,
double[2] vtkNotUsed(scalarRange), int vtkNotUsed(blendMode), double vtkNotUsed(sampleDistance))
{
if (!func)
{
return false;
}
if (func->GetMTime() > this->BuildTime || this->TextureObject->GetMTime() > this->BuildTime ||
!this->TextureObject->GetHandle())
{
return true;
}
return false;
}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeTransferFunction2D::AllocateTable() {}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeTransferFunction2D::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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