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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkFileFreeImageIO.h"
#include "itksys/RegularExpression.hxx"
#include <cstring>
#include <cstdlib>
// Specific ImageIO test
namespace itk
{
FileFreeImageIO ::FileFreeImageIO() {}
FileFreeImageIO::~FileFreeImageIO() {}
bool
FileFreeImageIO ::CanReadFile(const char * filename)
{
itksys::RegularExpression findPrefix("^FileFreeIO::");
if (findPrefix.find(filename))
{
return true;
}
else
{
return false;
}
}
void
FileFreeImageIO ::ReadImageInformation()
{
// type
// dimension
// size
// spacing
// origin
// direction
std::vector<unsigned int> sizeVector;
std::vector<double> spacingVector;
std::vector<double> originVector;
std::vector<std::vector<double>> directionVector;
itksys::RegularExpression findSize("Size=([^:$]*)");
if (findSize.find(this->GetFileName()))
{
std::vector<std::string> tempVector;
std::cout << "Size is: " << findSize.match(1) << std::endl;
this->SplitString(findSize.match(1), ",", tempVector);
for (std::vector<std::string>::size_type i = 0; i < tempVector.size(); ++i)
{
sizeVector.push_back(std::stoi(tempVector[i].c_str()));
}
}
itksys::RegularExpression findSpacing("Spacing=([^:$]*)");
if (findSpacing.find(this->GetFileName()))
{
std::vector<std::string> tempVector;
std::cout << "Spacing is: " << findSpacing.match(1) << std::endl;
this->SplitString(findSpacing.match(1), ",", tempVector);
for (std::vector<std::string>::size_type i = 0; i < tempVector.size(); ++i)
{
spacingVector.push_back(std::stod(tempVector[i].c_str()));
}
}
itksys::RegularExpression findOrigin("Origin=([^:$]*)");
if (findOrigin.find(this->GetFileName()))
{
std::vector<std::string> tempVector;
std::cout << "Origin is: " << findOrigin.match(1) << std::endl;
this->SplitString(findOrigin.match(1), ",", tempVector);
for (std::vector<std::string>::size_type i = 0; i < tempVector.size(); ++i)
{
originVector.push_back(std::stod(tempVector[i].c_str()));
}
}
itksys::RegularExpression findDirection("Direction=([^:$]*)");
if (findDirection.find(this->GetFileName()))
{
std::vector<std::string> tempVector;
std::cout << "Direction is: " << findDirection.match(1) << std::endl;
this->SplitString(findDirection.match(1), ",", tempVector);
std::vector<std::string>::size_type ii = 0;
directionVector.resize(sizeVector.size());
for (std::vector<std::string>::size_type i = 0; i < tempVector.size() / 2; ++i)
{
for (std::vector<std::string>::size_type j = 0; j < tempVector.size() / 2; ++j)
{
directionVector[i].push_back(std::stod(tempVector[ii].c_str()));
ii++;
}
}
}
if (originVector.empty())
{
for (std::vector<std::string>::size_type i = 0; i < sizeVector.size(); ++i)
{
originVector.push_back(0.0);
}
}
if (spacingVector.empty())
{
for (std::vector<std::string>::size_type i = 0; i < sizeVector.size(); ++i)
{
spacingVector.push_back(1.0);
}
}
if (directionVector.empty())
{
directionVector.resize(sizeVector.size());
for (std::vector<std::string>::size_type i = 0; i < sizeVector.size(); ++i)
{
for (std::vector<std::string>::size_type j = 0; j < sizeVector.size(); ++j)
{
if (i == j)
{
directionVector[i].push_back(1.0);
}
else
{
directionVector[i].push_back(0.0);
}
}
}
}
this->SetNumberOfDimensions(sizeVector.size());
this->SetNumberOfComponents(1);
this->SetPixelType(IOPixelEnum::SCALAR);
this->SetComponentType(IOComponentEnum::UCHAR);
for (std::vector<std::string>::size_type i = 0; i < sizeVector.size(); ++i)
{
this->SetDimensions(i, sizeVector[i]);
this->SetSpacing(i, spacingVector[i]);
this->SetOrigin(i, originVector[i]);
this->SetDirection(i, directionVector[i]);
}
std::cout << "Size in bytes: " << this->GetImageSizeInPixels() << std::endl;
std::cout << "ReadInformation complete!" << std::endl;
}
// Read from the generated image
void
FileFreeImageIO ::Read(void * buffer)
{
memset(buffer, static_cast<unsigned char>(175), this->GetImageSizeInBytes());
}
bool
FileFreeImageIO ::CanWriteFile(const char *)
{
return false;
}
void
FileFreeImageIO ::WriteImageInformation()
{}
void
FileFreeImageIO ::Write(const void *)
{}
void
FileFreeImageIO ::SplitString(const std::string & text,
const std::string & separators,
std::vector<std::string> & words)
{
const std::string::size_type n = text.length();
std::string::size_type start = text.find_first_not_of(separators);
while (start < n)
{
std::string::size_type stop = text.find_first_of(separators, start);
if (stop > n)
{
stop = n;
}
words.push_back(text.substr(start, stop - start));
start = text.find_first_not_of(separators, stop + 1);
}
}
void
FileFreeImageIO ::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
} // end namespace itk
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