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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkThreadedImageWriter.h"
#include "vtkBMPWriter.h"
#include "vtkCommand.h"
#include "vtkFloatArray.h"
#include "vtkImageData.h"
#include "vtkJPEGWriter.h"
#include "vtkLogger.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkPNGWriter.h"
#include "vtkPNMWriter.h"
#include "vtkPointData.h"
#include "vtkTIFFWriter.h"
#include "vtkThreadedTaskQueue.h"
#include "vtkUnsignedCharArray.h"
#include "vtkXMLImageDataWriter.h"
#include "vtkZLibDataCompressor.h"
#include "vtksys/FStream.hxx"
#include <cassert>
#include <cmath>
#include <iostream>
#include <vtksys/SystemTools.hxx>
#define MAX_NUMBER_OF_THREADS_IN_POOL 32
//****************************************************************************
namespace
{
void EncodeAndWrite(const vtkSmartPointer<vtkImageData>& image, const std::string& fileName)
{
vtkLogF(TRACE, "encoding: %s", fileName.c_str());
assert(image != nullptr);
std::size_t pos = fileName.rfind('.');
std::string extension = fileName.substr(pos + 1);
if (extension == "Z")
{
vtkNew<vtkZLibDataCompressor> zLib;
float* zBuf = static_cast<vtkFloatArray*>(image->GetPointData()->GetScalars())->GetPointer(0);
size_t bufSize = image->GetNumberOfPoints() * sizeof(float);
unsigned char* cBuffer = new unsigned char[bufSize];
size_t compressSize = zLib->Compress((unsigned char*)zBuf, bufSize, cBuffer, bufSize);
vtksys::ofstream fileHandler(fileName.c_str(), ios::out | ios::binary);
fileHandler.write((const char*)cBuffer, compressSize);
delete[] cBuffer;
}
else if (extension == "png")
{
vtkNew<vtkPNGWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else if (extension == "jpg" || extension == "jpeg")
{
vtkNew<vtkJPEGWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else if (extension == "bmp")
{
vtkNew<vtkBMPWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else if (extension == "ppm")
{
vtkNew<vtkPNMWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else if (extension == "tif" || extension == "tiff")
{
vtkNew<vtkTIFFWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else if (extension == "vti")
{
vtkNew<vtkXMLImageDataWriter> writer;
writer->SetFileName(fileName.c_str());
writer->SetInputData(image);
writer->Write();
}
else
{
vtkDataArray* scalars = image->GetPointData()->GetScalars();
int scalarSize = scalars->GetDataTypeSize();
const char* scalarPtr = static_cast<const char*>(scalars->GetVoidPointer(0));
size_t numberOfScalars = image->GetNumberOfPoints();
vtksys::ofstream fileHandler(fileName.c_str(), ios::out | ios::binary);
fileHandler.write(scalarPtr, numberOfScalars * scalarSize);
}
}
}
VTK_ABI_NAMESPACE_BEGIN
//****************************************************************************
class vtkThreadedImageWriter::vtkInternals
{
private:
using TaskQueueType = vtkThreadedTaskQueue<void, vtkSmartPointer<vtkImageData>, std::string>;
std::unique_ptr<TaskQueueType> Queue;
public:
vtkInternals()
: Queue(nullptr)
{
}
~vtkInternals() { this->TerminateAllWorkers(); }
void TerminateAllWorkers()
{
if (this->Queue)
{
this->Queue->Flush();
}
this->Queue.reset(nullptr);
}
void SpawnWorkers(vtkTypeUInt32 numberOfThreads)
{
this->Queue.reset(new TaskQueueType(::EncodeAndWrite,
/*strict_ordering=*/true,
/*buffer_size=*/-1,
/*max_concurrent_tasks=*/static_cast<int>(numberOfThreads)));
}
void PushImageToQueue(vtkSmartPointer<vtkImageData>&& data, std::string&& filename)
{
this->Queue->Push(std::move(data), std::move(filename));
}
};
vtkStandardNewMacro(vtkThreadedImageWriter);
//------------------------------------------------------------------------------
vtkThreadedImageWriter::vtkThreadedImageWriter()
: Internals(new vtkInternals())
{
this->MaxThreads = MAX_NUMBER_OF_THREADS_IN_POOL;
}
//------------------------------------------------------------------------------
vtkThreadedImageWriter::~vtkThreadedImageWriter()
{
delete this->Internals;
this->Internals = nullptr;
}
//------------------------------------------------------------------------------
void vtkThreadedImageWriter::SetMaxThreads(vtkTypeUInt32 maxThreads)
{
if (maxThreads < MAX_NUMBER_OF_THREADS_IN_POOL && maxThreads > 0)
{
this->MaxThreads = maxThreads;
}
}
//------------------------------------------------------------------------------
void vtkThreadedImageWriter::Initialize()
{
// Stop any started thread first
this->Internals->TerminateAllWorkers();
// Make sure we don't keep adding new threads
// this->Internals->TerminateAllWorkers();
// Register new worker threads
this->Internals->SpawnWorkers(this->MaxThreads);
}
//------------------------------------------------------------------------------
void vtkThreadedImageWriter::EncodeAndWrite(vtkImageData* image, const char* fileName)
{
// Error checking
if (image == nullptr)
{
vtkErrorMacro(<< "Write:Please specify an input!");
return;
}
// we make a shallow copy so that the caller doesn't have to take too much
// care when modifying image besides the standard requirements for the case
// where the image is propagated in the pipeline.
vtkSmartPointer<vtkImageData> img;
img.TakeReference(image->NewInstance());
img->ShallowCopy(image);
this->Internals->PushImageToQueue(std::move(img), std::string(fileName));
}
//------------------------------------------------------------------------------
void vtkThreadedImageWriter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
void vtkThreadedImageWriter::Finalize()
{
this->Internals->TerminateAllWorkers();
}
VTK_ABI_NAMESPACE_END
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