PNGWriter
VTKExamples/Cxx/IO/PNGWriter
Code¶
PNGWriter.cxx
#include <vtkImageData.h> #include <vtkPNGWriter.h> #include <vtkSmartPointer.h> #include <vtkImageCanvasSource2D.h> #include <vtkImageCast.h> int main(int argc, char *argv[]) { std::string outputFilename; if( argc > 1) { outputFilename = argv[1]; } else { outputFilename = "output.png"; } 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<vtkPNGWriter> writer = vtkSmartPointer<vtkPNGWriter>::New(); writer->SetFileName(outputFilename.c_str()); writer->SetInputConnection(castFilter->GetOutputPort()); writer->Write(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(PNGWriter) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(PNGWriter MACOSX_BUNDLE PNGWriter.cxx) target_link_libraries(PNGWriter ${VTK_LIBRARIES})
Download and Build PNGWriter¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download PNGWriter and its CMakeLists.txt file. Once the tarball PNGWriter.tar has been downloaded and extracted,
cd PNGWriter/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./PNGWriter
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.