// ***************************************************************** -*- C++ -*-

// prevtest.cpp

// Test access to preview images

#include <exiv2/exiv2.hpp>

#include <string>

#include <iostream>

#include <cassert>

int main(int argc, char* const argv[])

try {

    if (argc != 2) {

        std::cout << "Usage: " << argv[0] << " file\n";

        return 1;

    }

    std::string filename(argv[1]);

    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename);

    assert(image.get() != 0);

    image->readMetadata();

    Exiv2::PreviewManager loader(*image);

    Exiv2::PreviewPropertiesList list = loader.getPreviewProperties();

    for (Exiv2::PreviewPropertiesList::iterator pos = list.begin(); pos != list.end(); pos++) {

        std::cout << pos->mimeType_

                  << " preview, type " << pos->id_ << ", "

                  << pos->size_ << " bytes, "

                  << pos->width_ << 'x' << pos->height_ << " pixels"

                  << "\n";

        Exiv2::PreviewImage preview = loader.getPreviewImage(*pos);

        preview.writeFile(filename + "_"

                          + Exiv2::toString(pos->width_) + "x"

                          + Exiv2::toString(pos->height_));

    }

    // Cleanup

    Exiv2::XmpParser::terminate();

    return 0;

}

catch (Exiv2::AnyError& e) {

    std::cout << "Caught Exiv2 exception '" << e << "'\n";

    return -1;

}