Function main

compute/example/resize_image.cpp:211–251

the resize image example demonstrates how to interactively resize a 2D image and display it using OpenGL. a image sampler is used to perform hardware-accelerated linear interpolation for the resized image.

// 2D image and display it using OpenGL. a image sampler is used to perform
// hardware-accelerated linear interpolation for the resized image.
int main(int argc, char *argv[])
{
    // setup command line arguments
    po::options_description options("options");
    options.add_options()
        ("help", "show usage instructions")
        ("file", po::value<std::string>(), "image file name (e.g. /path/to/image.png)")
    ;
    po::positional_options_description positional_options;
    positional_options.add("file", 1);

    // parse command line
    po::variables_map vm;
    po::store(
        po::command_line_parser(argc, argv)
            .options(options)
            .positional(positional_options)
            .run(),
        vm
    );
    po::notify(vm);

    // check for file argument
    if(vm.count("help") || !vm.count("file")){
        std::cout << options << std::endl;
        return -1;
    }

    // get file name
    std::string file_name = vm["file"].as<std::string>();

    // setup qt application
    QApplication app(argc, argv);

    // setup image widget
    ImageWidget widget(QString::fromStdString(file_name));
    widget.show();

    // run qt application
    return app.exec();
}

#include "resize_image.moc"