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
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.