{{ $alt := .Get 1 | default "" }}
{{ $class := .Get 2 | default "" }}
{{ $imgpath := "images/" }}

{{- with $mainPath := .Get 0 }}

    {{- with $i := resources.Get (printf "%s%s" $imgpath $mainPath) }}
        {{ $resizedImage := $i.Process "resize 1920x" }}
        <picture class="{{ $class}}">
            {{ $smallpath := "images/small/" }}

            {{- with $smallImage := resources.Get (printf "%s%s" $smallpath $mainPath ) }}
                {{ $smallResized := $smallImage.Process "resize 1080x" }}
                <source srcset="{{ $smallResized.RelPermalink }}" media="(max-width: 768px)">
            {{- end}}
            <img src="{{ $resizedImage.RelPermalink }}" alt="{{ $alt }}">
        </picture>
    {{- else }}
        {{- errorf "The %q shortcode was unable to find %q. See %s" $.Name . $.Position }}
    {{- end }}
{{- else }}
  {{- errorf "The %q shortcode requires a positional parameter (0) indicating the image path, relative to the current page. See %s" $.Name $.Position }}
{{- end }}