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QImageToImageSource

vtk-examples/Cxx/Qt/QImageToImageSource

Description

This example demonstrates the use of vtkQImageToImageSource.

See also the ImageDataToQImage example.

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

QImageToImageSource.cxx

#include <QApplication>
#include <QPixmap>
#include <vtkNew.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);

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

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(QImageToImageSource)

find_package(VTK COMPONENTS 
  CommonCore
  RenderingQt
  QUIET
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "QImageToImageSource: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
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}
)

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.