VTK/Examples/Cxx/Qt/QImageToImageSource

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This example demonstrates the use of vtkQImageToImageSource.

See also the ImageDataToQImage example.

QImageToImageSource.cxx

#include <QApplication>
#include <QPixmap>

#include "vtkSmartPointer.h"
#include "vtkQImageToImageSource.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 2.8)
 
if(POLICY CMP0020)
  cmake_policy(SET CMP0020 NEW)
endif()

PROJECT(QImageToImageSource)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  # Instruct CMake to run moc automatically when needed.
  set(CMAKE_AUTOMOC ON)
  find_package(Qt5Widgets REQUIRED QUIET)
else()
  find_package(Qt4 REQUIRED)
  include(${QT_USE_FILE})
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})

file(GLOB UI_FILES *.ui)
file(GLOB QT_WRAP *.h)
file(GLOB CXX_FILES *.cxx)

if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4")
  qt5_wrap_ui(UISrcs ${UI_FILES} )
  # CMAKE_AUTOMOC in ON so the MOC headers will be automatically wrapped.
  add_executable(QImageToImageSource MACOSX_BUNDLE
    ${CXX_FILES} ${UISrcs} ${QT_WRAP})
  qt5_use_modules(QImageToImageSource Core Gui)
  target_link_libraries(QImageToImageSource ${VTK_LIBRARIES})
else()
  QT4_WRAP_UI(UISrcs ${UI_FILES})
  QT4_WRAP_CPP(MOCSrcs ${QT_WRAP})
  add_executable(QImageToImageSource MACOSX_BUNDLE ${CXX_FILES} ${UISrcs} ${MOCSrcs})

  if(VTK_LIBRARIES)
    if(${VTK_VERSION} VERSION_LESS "6")
      target_link_libraries(QImageToImageSource ${VTK_LIBRARIES} QVTK)
    else()
      target_link_libraries(QImageToImageSource ${VTK_LIBRARIES})
    endif()
  else()
    target_link_libraries(QImageToImageSource vtkHybrid QVTK vtkViews ${QT_LIBRARIES})
  endif()
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

This example requires Qt and VTK.

  • If VTK and Qt are 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 ..
  • If Qt is not found on your system, you will need to tell CMake where to find qmake:
cmake -DQT_QMAKE_EXECUTABLE:FILEPATH=/usr/something/qmake  ..

Build the project:

make

and run it:

./QImageToImageSource

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. You may also need to add a Qt related path.