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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
// .NAME Test of WriteToMemory flag for PNG/JPEG/BMP Writers
// .SECTION Description
//
#include <vtkBMPWriter.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageCast.h>
#include <vtkJPEGWriter.h>
#include <vtkPNGWriter.h>
#include <vtkSmartPointer.h>
#include <vtksys/SystemTools.hxx>
int TestWriteToMemory(int argc, char* argv[])
{
if (argc <= 1)
{
cout << "Usage: " << argv[0] << " <output file name>" << endl;
return EXIT_FAILURE;
}
int extent[6] = { 0, 99, 0, 99, 0, 0 };
vtkSmartPointer<vtkImageCanvasSource2D> imageSource =
vtkSmartPointer<vtkImageCanvasSource2D>::New();
imageSource->SetExtent(extent);
imageSource->SetScalarTypeToUnsignedChar();
imageSource->SetNumberOfScalarComponents(3);
imageSource->SetDrawColor(127, 45, 255);
imageSource->FillBox(0, 99, 0, 99);
imageSource->SetDrawColor(255, 255, 255);
imageSource->FillBox(40, 70, 20, 50);
imageSource->Update();
vtkSmartPointer<vtkImageCast> castFilter = vtkSmartPointer<vtkImageCast>::New();
castFilter->SetOutputScalarTypeToUnsignedChar();
castFilter->SetInputConnection(imageSource->GetOutputPort());
castFilter->Update();
vtkSmartPointer<vtkImageWriter> writer;
std::string filename = argv[1];
std::string fileext = filename.substr(filename.find_last_of('.') + 1);
// Delete any existing files to prevent false failures
if (vtksys::SystemTools::FileExists(filename))
{
vtksys::SystemTools::RemoveFile(filename);
}
if (fileext == "png")
{
vtkSmartPointer<vtkPNGWriter> pngWriter = vtkSmartPointer<vtkPNGWriter>::New();
pngWriter->WriteToMemoryOn();
writer = pngWriter;
}
else if (fileext == "jpeg" || fileext == "jpg")
{
vtkSmartPointer<vtkJPEGWriter> jpgWriter = vtkSmartPointer<vtkJPEGWriter>::New();
jpgWriter->WriteToMemoryOn();
writer = jpgWriter;
}
else if (fileext == "bmp")
{
vtkSmartPointer<vtkBMPWriter> bmpWriter = vtkSmartPointer<vtkBMPWriter>::New();
bmpWriter->WriteToMemoryOn();
writer = bmpWriter;
}
writer->SetFileName(filename.c_str());
writer->SetInputConnection(castFilter->GetOutputPort());
writer->Update();
writer->Write();
// With WriteToMemory true no file should be written
if (!vtksys::SystemTools::FileExists(filename))
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
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