Function createScaleFactor

src/OptionHandler.cpp:89–121

//------------------------------------------------------------------------------

static std::unique_ptr<ScaleFactor> createScaleFactor(const Options& options)
{
    std::unique_ptr<ScaleFactor> scale_factor;

    if (options.hasSamplesPerPixel() && options.hasEndTime()) {
        throwError("Specify either --end or --zoom but not both");
    }
    else if (options.hasPixelsPerSecond() && options.hasEndTime()) {
        throwError("Specify either --end or --pixels-per-second but not both");
    }
    else if (options.hasSamplesPerPixel() && options.hasPixelsPerSecond()) {
        throwError("Specify either --zoom or --pixels-per-second but not both");
    }
    else if (options.hasEndTime()) {
        scale_factor.reset(new DurationScaleFactor(
            options.getStartTime(),
            options.getEndTime(),
            options.getImageWidth()
        ));
    }
    else if (options.hasPixelsPerSecond()) {
        scale_factor.reset(
            new PixelsPerSecondScaleFactor(options.getPixelsPerSecond())
        );
    }
    else {
        scale_factor.reset(
            new SamplesPerPixelScaleFactor(options.getSamplesPerPixel())
        );
    }

    return scale_factor;
}

//------------------------------------------------------------------------------