PNGReader
VTKExamples/Cxx/IO/PNGReader
Description
This example demonstrates how to read a PNG image file.
Code
PNGReader.cxx
#include <vtkSmartPointer.h>
#include <vtkImageViewer2.h>
#include <vtkPNGReader.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
int main(int argc, char* argv[])
{
// Verify input arguments
if ( argc < 2 )
{
std::cout << "Usage: " << argv[0]
<< " Filename(.png)" << std::endl;
return EXIT_FAILURE;
}
// Read the image
vtkSmartPointer<vtkPNGReader> reader =
vtkSmartPointer<vtkPNGReader>::New();
reader->SetFileName(argv[1]);
// Visualize
vtkSmartPointer<vtkImageViewer2> imageViewer =
vtkSmartPointer<vtkImageViewer2>::New();
imageViewer->SetInputConnection(reader->GetOutputPort());
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
imageViewer->SetupInteractor(renderWindowInteractor);
imageViewer->Render();
imageViewer->GetRenderer()->ResetCamera();
imageViewer->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(PNGReader)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(PNGReader MACOSX_BUNDLE PNGReader.cxx)
target_link_libraries(PNGReader ${VTK_LIBRARIES})
Download and Build PNGReader
Click here to download PNGReader and its CMakeLists.txt file. Once the tarball PNGReader.tar has been downloaded and extracted,
cd PNGReader/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:
./PNGReader
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.