Merge "Capture first display for multi-display devices"

    }

    if (!displayId) { // no diplsay id is specified

        if (ids.size() == 1) {

        displayId = ids.front();

        } else {

            fprintf(stderr, "Please specify a display ID (-d display-id) for multi-display device.\n");

        if (ids.size() > 1) {

            fprintf(stderr,

                    "[Warning] Multiple displays were found, but no display id was specified! "

                    "Defaulting to the first display found, however this default is not guaranteed "

                    "to be consistent across captures. A display id should be specified.\n");

            fprintf(stderr, "A display ID can be specified with the [-d display-id] option.\n");

            fprintf(stderr, "See \"dumpsys SurfaceFlinger --display-id\" for valid display IDs.\n");

            return 1;

        }

    }