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
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.