{{/* Automatic resizing for HiDPI/retina images */}}

{{ $original := .Page.Resources.GetMatch (.Get "src") }}
{{ .Scratch.Set "image" $original }}

{{ $setWidth := .Site.Params.maxWidth }}

{{ if .Get "width" }}
  {{ $setWidth = (int (.Get "width")) }}
{{ end }}

{{ $retinaWidth := (mul $setWidth 2) }}

{{ if gt $original.Width $retinaWidth -}}
  {{ $finalWidth := (printf "%dx" $retinaWidth) }}
  {{ .Scratch.Set "image" ($original.Resize $finalWidth) }}
{{ end }}

{{ $image := .Scratch.Get "image" }}

{{ $origRatio := (div (float $image.Height) $image.Width) }}
{{ $displayWidth := $setWidth }}
{{ $displayHeight := (math.Ceil (mul $origRatio $setWidth)) }}

{{ return (dict "Permalink" $image.Permalink "Width" $displayWidth "Height" $displayHeight "MediaType" $image.MediaType) }}