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vtkImageWrapPad.cxx
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vtkImageWrapPad.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageWrapPad.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 "vtkImageWrapPad.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
vtkStandardNewMacro(vtkImageWrapPad);
//----------------------------------------------------------------------------
// Just clip the request.
void vtkImageWrapPad::ComputeInputUpdateExtent (int inExt[6], int outExt[6],
int wholeExtent[6])
{
int idx;
int min, max, width, imageMin, imageMax, imageWidth;
// Clip
for (idx = 0; idx < 3; ++idx)
{
min = outExt[idx * 2];
max = outExt[idx * 2 + 1];
imageMin = wholeExtent[idx * 2];
imageMax = wholeExtent[idx * 2 + 1];
if (min > max || imageMin > imageMax)
{ // Empty output request.
inExt[0] = inExt[2] = inExt[4] = 0;
inExt[1] = inExt[3] = inExt[5] = -1;
return;
}
width = max - min + 1;
imageWidth = imageMax - imageMin + 1;
// convert min max to image extent range.
min = ((min - imageMin) % imageWidth);
if (min < 0)
{ // Mod does not handle negative numbers as I think it should.
min += imageWidth;
}
min += imageMin;
max = min + width - 1;
// if request region wraps, we need the whole input
// (unless we make multiple requests! Write Update instead??)
if (max > imageMax)
{
max = imageMax;
min = imageMin;
}
inExt[idx * 2] = min;
inExt[idx * 2 + 1] = max;
}
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
template <class T>
void vtkImageWrapPadExecute(vtkImageWrapPad *self,
vtkImageData *inData, T *vtkNotUsed(inPtr),
vtkImageData *outData, T *outPtr,
int outExt[6], int id,
int wholeExt[6])
{
int min0, max0;
int imageMin0, imageMax0, imageMin1, imageMax1,
imageMin2, imageMax2;
int outIdx0, outIdx1, outIdx2;
int start0, start1, start2;
int inIdx0, inIdx1, inIdx2;
vtkIdType inInc0, inInc1, inInc2;
vtkIdType outIncX, outIncY, outIncZ;
T *inPtr0, *inPtr1, *inPtr2;
unsigned long count = 0;
unsigned long target;
int inMaxC, idxC, maxC;
// Get information to march through data
inData->GetIncrements(inInc0, inInc1, inInc2);
imageMin0 = wholeExt[0];
imageMax0 = wholeExt[1];
imageMin1 = wholeExt[2];
imageMax1 = wholeExt[3];
imageMin2 = wholeExt[4];
imageMax2 = wholeExt[5];
outData->GetContinuousIncrements(outExt, outIncX, outIncY, outIncZ);
// initialize pointers to corresponding pixels.
start0 = ((outExt[0] - imageMin0) % (imageMax0-imageMin0+1)) + imageMin0;
if (start0 < 0)
{
start0 += (imageMax0-imageMin0+1);
}
start1 = ((outExt[2] - imageMin1) % (imageMax1-imageMin1+1)) + imageMin1;
if (start1 < 0)
{
start1 += (imageMax1-imageMin1+1);
}
start2 = ((outExt[4] - imageMin2) % (imageMax2-imageMin2+1)) + imageMin2;
if (start2 < 0)
{
start2 += (imageMax2-imageMin2+1);
}
inPtr2 = static_cast<T *>(inData->GetScalarPointer(start0, start1, start2));
min0 = outExt[0];
max0 = outExt[1];
inMaxC = inData->GetNumberOfScalarComponents();
maxC = outData->GetNumberOfScalarComponents();
target = static_cast<unsigned long>((outExt[5]-outExt[4]+1)*
(outExt[3]-outExt[2]+1)/50.0);
target++;
inIdx2 = start2;
for (outIdx2 = outExt[4]; outIdx2 <= outExt[5]; ++outIdx2, ++inIdx2)
{
if (inIdx2 > imageMax2)
{ // we need to wrap(rewind) the input on this axis
inIdx2 = imageMin2;
inPtr2 -= (imageMax2-imageMin2+1)*inInc2;
}
inPtr1 = inPtr2;
inIdx1 = start1;
for (outIdx1 = outExt[2];
!self->AbortExecute && outIdx1 <= outExt[3]; ++outIdx1, ++inIdx1)
{
if (!id)
{
if (!(count%target))
{
self->UpdateProgress(count/(50.0*target));
}
count++;
}
if (inIdx1 > imageMax1)
{ // we need to wrap(rewind) the input on this axis
inIdx1 = imageMin1;
inPtr1 -= (imageMax1-imageMin1+1)*inInc1;
}
inPtr0 = inPtr1;
inIdx0 = start0;
// if components are same much faster
if ((maxC == inMaxC) && (maxC == 1))
{
for (outIdx0 = min0; outIdx0 <= max0; ++outIdx0, ++inIdx0)
{
if (inIdx0 > imageMax0)
{ // we need to wrap(rewind) the input on this axis
inIdx0 = imageMin0;
inPtr0 -= (imageMax0-imageMin0+1)*inInc0;
}
// Copy Pixel
*outPtr = *inPtr0;
outPtr++; inPtr0++;
}
}
else
{
for (outIdx0 = min0; outIdx0 <= max0; ++outIdx0, ++inIdx0)
{
if (inIdx0 > imageMax0)
{ // we need to wrap(rewind) the input on this axis
inIdx0 = imageMin0;
inPtr0 -= (imageMax0-imageMin0+1)*inInc0;
}
for (idxC = 0; idxC < maxC; idxC++)
{
// Copy Pixel
*outPtr = inPtr0[idxC%inMaxC];
outPtr++;
}
inPtr0 += inInc0;
}
}
outPtr += outIncY;
inPtr1 += inInc1;
}
outPtr += outIncZ;
inPtr2 += inInc2;
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output data, and executes the filter
// algorithm to fill the output from the input.
// It just executes a switch statement to call the correct function for
// the regions data types.
void vtkImageWrapPad::ThreadedRequestData (
vtkInformation * vtkNotUsed( request ),
vtkInformationVector** inputVector,
vtkInformationVector * vtkNotUsed( outputVector ),
vtkImageData ***inData,
vtkImageData **outData,
int outExt[6], int id)
{
// return if nothing to do
if (outExt[1] < outExt[0] ||
outExt[3] < outExt[2] ||
outExt[5] < outExt[4])
{
return;
}
int inExt[6];
// get the whole extent
int wExt[6];
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),wExt);
this->ComputeInputUpdateExtent(inExt,outExt,wExt);
void *inPtr = inData[0][0]->GetScalarPointerForExtent(inExt);
void *outPtr = outData[0]->GetScalarPointerForExtent(outExt);
vtkDebugMacro(<< "Execute: inData = " << inData[0][0]
<< ", outData = " << outData[0]);
// this filter expects that input is the same type as output.
if (inData[0][0]->GetScalarType() != outData[0]->GetScalarType())
{
vtkErrorMacro(<< "Execute: input ScalarType, "
<< inData[0][0]->GetScalarType()
<< ", must match out ScalarType "
<< outData[0]->GetScalarType());
return;
}
switch (inData[0][0]->GetScalarType())
{
vtkTemplateMacro(
vtkImageWrapPadExecute(
this, inData[0][0],
static_cast<VTK_TT *>(inPtr), outData[0],
static_cast<VTK_TT *>(outPtr), outExt, id,
inputVector[0]->GetInformationObject(0)->Get(
vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT())));
default:
vtkErrorMacro(<< "Execute: Unknown ScalarType");
return;
}
}