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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D.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 "vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkPiecewiseFunction.h"
#include "vtkTextureObject.h"
#include "vtkVolumeProperty.h"
#include <algorithm>
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D);
//------------------------------------------------------------------------------
vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D::
vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D()
{
this->NumberOfColorComponents = 1;
}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D::InternalUpdate(vtkObject* func,
int vtkNotUsed(blendMode), double vtkNotUsed(sampleDistance), double vtkNotUsed(unitDistance),
int filterValue)
{
if (!func)
{
return;
}
vtkVolumeProperty* prop = vtkVolumeProperty::SafeDownCast(func);
if (!prop)
{
return;
}
std::set<int> labels = prop->GetLabelMapLabels();
std::fill(this->Table, this->Table + this->TextureWidth * 1, 0.0f);
for (auto i = 1; i < this->TextureHeight; ++i)
{
float* tmpGradOp = new float[this->TextureWidth];
std::fill(tmpGradOp, tmpGradOp + this->TextureWidth, 1.0f);
vtkPiecewiseFunction* gradOp = prop->GetLabelGradientOpacity(i);
if (gradOp)
{
gradOp->GetTable(
0, (this->LastRange[1] - this->LastRange[0]) * 0.25, this->TextureWidth, tmpGradOp);
}
float* tablePtr = this->Table;
tablePtr += i * this->TextureWidth;
memcpy(tablePtr, tmpGradOp, this->TextureWidth * sizeof(float));
delete[] tmpGradOp;
}
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, this->Table);
}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D::ComputeIdealTextureSize(
vtkObject* func, int& width, int& height, vtkOpenGLRenderWindow* vtkNotUsed(renWin))
{
vtkVolumeProperty* prop = vtkVolumeProperty::SafeDownCast(func);
if (!prop)
{
return;
}
width = 1024;
// Set the height to one more than the max label value. The extra row will be
// for the special label 0 that represents un-masked values. It is also
// necessary to ensure that the shader indexing is correct.
std::set<int> const labels = prop->GetLabelMapLabels();
height = labels.empty() ? 1 : *(labels.crbegin()) + 1;
}
//------------------------------------------------------------------------------
void vtkOpenGLVolumeMaskGradientOpacityTransferFunction2D::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
VTK_ABI_NAMESPACE_END
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