pages/layouts/shortcodes/imgproc.html

{{ $img := .Page.Resources.GetMatch (printf "*%s*" (.Get 0)) }}
{{ $command := .Get 1 }}
{{ $options := .Get 2 }}
{{ $figclass := .Get 3 }}
{{ $imgclass := .Get 4 }}
{{ if eq $command "Fit" }}
  {{ $img = $img.Fit $options }}
{{ else if eq $command "Resize" }}
  {{ $img = $img.Resize $options }}
{{ else if eq $command "Fill" }}
  {{ $img = $img.Fill $options }}
{{ else if eq $command "Crop" }}
  {{ $img = $img.Crop $options }}
{{ else }}
  {{ errorf "Invalid image processing command: Must be one of Crop, Fit, Fill or Resize." }}
{{ end }}
<figure class="figure {{ $figclass }}">
  <img
    class="figure-img img img-fluid"
    src="{{ $img.RelPermalink }}"
    width="{{ $img.Width }}"
    height="{{ $img.Height }}"
  />
  {{ with .Inner }}
    <figcaption class="figure-caption">
      <small>
        {{ . | markdownify }}
      </small>
    </figcaption>
  {{ end }}
</figure>