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Transition to Hugo Image Processing (#173)

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* Update layout to use Hugo Image Processing.

Created shortcode rimg that uses the srcset attribute to display responsive images.

* Copy Static images to assets folder.

* Add image processing to missing components + Update examples

* Fix rendering in https://themes.gohugo.io/

Co-authored-by: Emruz Hossain <emruz@appscode.com>
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Patrick Magauran 2020-12-31 15:55:28 -05:00 • committed by GitHub
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{{/* Combination of code taken from: https://alexlakatos.com/web/2020/07/17/hugo-image-processing/ & https://dev.to/stereobooster/responsive-images-for-hugo-dn9}}
{{/* get file that matches the filename as specified as src="" in shortcode */}}
{{ $src := resources.GetMatch (.Get "src") }}
{{ if in (.Get "src") "http" }}
<img src="{{$src}}" {{ with .Get "alt" }}alt="{{.}}"{{ else }}alt=""{{ end }}>
{{ else }}
{{ if in (.Get "src") ".gif" }}
<img src="{{$src.RelPermalink}}" {{ with .Get "alt" }}alt="{{.}}"{{ else }}alt=""{{ end }}>
{{ else }}
{{/* set image sizes, these are hardcoded for now */}}
{{ $tinyw := default "500x" }}
{{ $smallw := default "800x" }}
{{ $mediumw := default "1200x" }}
{{ $largew := default "1500x" }}
{{/* resize the src image to the given sizes */}}
{{ $tiny := $src.Resize $tinyw }}
{{ $small := $src.Resize $smallw }}
{{ $medium := $src.Resize $mediumw }}
{{ $large := $src.Resize $largew }}
{{/* add the processed images to the scratch */}}
{{/* only use images smaller than or equal to the src (original) image size */}}
<img
{{ with .Get "sizes" }}sizes='{{.}}'{{ else }}{{ end }}
srcset='
{{ if ge $src.Width "500" }}
{{ with $tiny.RelPermalink }}{{.}} 500w{{ end }}
{{ end }}
{{ if ge $src.Width "800" }}
{{ with $small.RelPermalink }}, {{.}} 800w{{ end }}
{{ end }}
{{ if ge $src.Width "1200" }}
{{ with $medium.RelPermalink }}, {{.}} 1200w{{ end }}
{{ end }}
{{ if ge $src.Width "1500" }}
{{ with $large.RelPermalink }}, {{.}} 1500w {{ end }}
{{ end }}'
{{ if .Get (print $medium) }}
src="{{ $medium.RelPermalink }}"
{{ else }}
src="{{ $src.RelPermalink }}"
{{ end }}
{{ with .Get "alt" }}alt='{{.}}'{{ end }}>
{{ end }}
{{ end }}