18 lines (16 with data), 613 Bytes

{% extends "section.html.jinja" %}
{% block html_content %}
      <figure class="figure mx-auto d-block">
        {% if image_format == 'svg' %}
        <div class="d-flex justify-content-center">
          {{ img|safe }}
        </div>
        {% else %}
        <img class="figure-img img-fluid rounded mx-auto my-0 d-block" alt="{{ title }}"
          src="data:image/{{ image_format }};base64,{{ img }}">
        {% endif %}

        {% if caption is not none %}
        <figcaption class="figure-caption text-center">{{ caption }}</figcaption>
        {% endif %}
      </figure>
{% endblock html_content %}