QImageToImageSource

VTKExamples/Cxx/Qt/QImageToImageSource

Description

This example demonstrates the use of vtkQImageToImageSource.

See also the ImageDataToQImage example.

Code

QImageToImageSource.cxx

#include <QApplication>
#include <QPixmap>

#include <vtkQImageToImageSource.h>
#include <vtkSmartPointer.h>

int main(int argc, char *argv[]) {
  QApplication app(argc, argv);

  QPixmap pixmap(10, 10);
  QColor color(10, 20, 30);
  pixmap.fill(color);

  vtkSmartPointer<vtkQImageToImageSource> qimageToImageSource =
      vtkSmartPointer<vtkQImageToImageSource>::New();
  QImage qimage = pixmap.toImage();
  qimageToImageSource->SetQImage(&qimage);
  qimageToImageSource->Update();

  //  vtkImageData* image = qimageToImageSource->GetOutput();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(QImageToImageSource)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkRenderingQt QUIET)
if (NOT VTK_FOUND)
  message("Skipping QImageToImageSource: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(QImageToImageSource MACOSX_BUNDLE QImageToImageSource.cxx )
  target_link_libraries(QImageToImageSource PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(QImageToImageSource MACOSX_BUNDLE QImageToImageSource.cxx )
  target_link_libraries(QImageToImageSource PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS QImageToImageSource
    MODULES ${VTK_LIBRARIES}
    )
endif () 

Download and Build QImageToImageSource

Click here to download QImageToImageSource and its CMakeLists.txt file. Once the tarball QImageToImageSource.tar has been downloaded and extracted,

cd QImageToImageSource/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:

./QImageToImageSource

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.