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-rw-r--r--layouts/shortcodes/img.html84
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diff --git a/layouts/shortcodes/img.html b/layouts/shortcodes/img.html
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-{{/*
- Taken from https://www.brycewray.com/posts/2022/06/responsive-optimized-images-hugo/
-*/}}
-
-{{- $respSizes := .Site.Params.imageSizes -}}
-{{- $src := .Get "src" -}}
-{{- $source := resources.Get $src -}}
-{{- $alt := .Get "alt" -}}
-{{- $divClass := .Get "divClass" -}}
-{{/*
- The styling in $imgClass, below, makes
- an image fill the container horizontally
- and adjust its height automatically
- for that, and then fade in for the LQIP effect.
- Feel free to adjust your CSS/SCSS as desired.
-*/}}
-{{- $imgClass := "animate-fade" -}}
-{{- $dataSzes := "(min-width: 1024px) 100vw, 50vw" -}}
-{{/*
- Now we'll create the 20-pixel-wide LQIP
- and turn it into Base64-encoded data, which
- is better for performance and caching.
-*/}}
-{{- $LQIP_img := $source.Resize "20x jpg" -}}
-{{- $LQIP_b64 := $LQIP_img.Content | base64Encode -}}
-{{/*
- $CFPstyle is for use in styling
- the div's background, as you'll see shortly.
-*/}}
-{{- $CFPstyle := printf "%s%s%s%v%s" "background: url(data:image/jpeg;base64," $LQIP_b64 "); background-size: cover; background-repeat: no-repeat; width: " $source.Width "px;" -}}
-{{/*
- Then, we create a 640-pixel-wide JPG
- of the image. This will serve as the
- "fallback" image for that tiny percentage
- of browsers that don't understand the
- HTML `picture` tag.
-*/}}
-{{- $actualImg := $source.Resize "640x jpg" -}}
-<div class="picture{{with $divClass}} {{.}}{{end}}" style="{{ $CFPstyle | safeCSS }}">
-{{/*
- Now we'll build the `picture` which modern
- browsers use to decide which image, and
- which format thereof, to show. Remember to
- put `webp` first, since the browser will use
- the first format it **can** use, and WebP files
- usually are smaller. After WebP, the fallback
- is the universally safe JPG format.
-*/}}
- <a href="{{ $source.RelPermalink }}">
- <picture>
- <source
- type="image/webp"
- srcset="
- {{- with $respSizes -}}
- {{- range $i, $e := $respSizes -}}
- {{- if ge $source.Width . -}}
- {{- if $i }}, {{ end -}}{{- ($source.Resize (printf "%vx%v" $e " webp") ).RelPermalink }} {{ . }}w
- {{- end -}}
- {{- end -}}
- {{- end -}}"
- sizes="{{ $dataSzes }}"
- />
- <source
- type="image/jpeg"
- srcset="
- {{- with $respSizes -}}
- {{- range $i, $e := . -}}
- {{- if ge $source.Width . -}}
- {{- if $i }}, {{ end -}}{{- ($source.Resize (printf "%vx%v" . " jpg") ).RelPermalink }} {{ . }}w
- {{- end -}}
- {{- end -}}
- {{- end -}}"
- sizes="{{ $dataSzes }}"
- />
- <img class="{{ $imgClass }}"
- src="{{ $actualImg.RelPermalink }}"
- width="{{ $source.Width }}"
- height="{{ $source.Height }}"
- alt="{{ $alt }}"
- loading="lazy"
- />
- </picture>
- </a>
-</div>