JPEGWriter
VTKExamples/Cxx/IO/JPEGWriter
Code¶
JPEGWriter.cxx
#include <vtkSmartPointer.h> #include <vtkImageCanvasSource2D.h> #include <vtkJPEGWriter.h> int main(int vtkNotUsed(argc), char* vtkNotUsed(argv)[]) { std::string outputFilename = "output.jpg"; // Create a 100x100 image to save into the jpeg file int extent[6] = { 0, 99, 0, 99, 0, 0 }; vtkSmartPointer<vtkImageCanvasSource2D> imageSource = vtkSmartPointer<vtkImageCanvasSource2D>::New(); imageSource->SetExtent( extent ); imageSource->SetScalarTypeToUnsignedChar(); // vtkJPEGWriter only accepts unsigned char input imageSource->SetNumberOfScalarComponents( 3 ); // 3 color channels: Red, Green and Blue // Fill the whole image with a blue background imageSource->SetDrawColor( 0, 127, 255 ); imageSource->FillBox( extent[0], extent[1], extent[2], extent[3] ); // Paint a 30x30 white square into the image imageSource->SetDrawColor( 255, 255, 255 ); imageSource->FillBox( 40, 70, 20, 50 ); vtkSmartPointer<vtkJPEGWriter> writer = vtkSmartPointer<vtkJPEGWriter>::New(); writer->SetFileName( outputFilename.c_str() ); writer->SetInputConnection( imageSource->GetOutputPort() ); writer->Write(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(JPEGWriter) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(JPEGWriter MACOSX_BUNDLE JPEGWriter.cxx) target_link_libraries(JPEGWriter ${VTK_LIBRARIES})
Download and Build JPEGWriter¶
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 Some tarballs may be missing or out-of-date.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 JPEGWriter and its CMakeLists.txt file. Once the tarball JPEGWriter.tar has been downloaded and extracted,
cd JPEGWriter/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:
./JPEGWriter
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.