python-gallery/onlylegs/templates/macros/image.html

{% macro gallery_item(image) %}
    <a
        id="image-{{ image.id }}"
        class="gallery-item square"
        href="{{ url_for('image.image', image_id=image.id) }}"
        style="background-color: rgb{{ image.colours.0 }}"
        draggable="false">
        <div class="image-filter">
            <p class="image-subtitle">By {{ image.username }}</p>
            <p class="image-title"><span class="time">{{ image.created_at }}</span></p>
        </div>
        <picture>
            <source srcset="{{ url_for('api.media', path='uploads/' + image.filename) }}?r=thumb&e=webp">
            <source srcset="{{ url_for('api.media', path='uploads/' + image.filename) }}?r=thumb&e=png">
            <img
                src="{{ url_for('api.media', path='uploads/' + image.filename) }}?r=thumb"
                alt="{% if image.alt %}{{ image.alt }}{% else %}Image Thumbnail{% endif %}"
                onload="imgFade(this)"
                style="opacity:0;"
            />
        </picture>
    </a>
{% endmacro %}