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# https://discourse.gohugo.io/t/set-page-build-options-publishresources-in-the-site-or-theme-configuration/55942/5  
# https://gohugo.io/content-management/build-options/  
[[cascade]]  
    [cascade.target]  
        path = "/**"  
    [cascade.build]  
        publishResources = false

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{{/*  {{- $image := partial "helper/image" (dict "Resources" .Page.Resources "Image" .Destination) -}}  */}}
{{- $alt := .PlainText | safeHTML -}}

{{/* 将helper/image中的访问图片的代码copy过，防止访问RelPermalink，原图又会打包进去 */}}
{{ $url := urls.Parse .Destination }}
{{ $resource := "" }}
{{ if not (in (slice "https" "http") $url.Scheme) }}
    {{ $resource = .Page.Resources.Get (printf "%s" (.Destination | safeURL)) }}
{{ else }}
    {{ with try (resources.GetRemote $url) }}
        {{ with .Err }}
            {{ errorf "%s" . }}
        {{ else with .Value }}
            {{ $resource = . }}
        {{ else }}
            {{ errorf "Unable to get remote resource %q" $url }}
        {{ end }}
    {{ end }}   
{{ end }}

{{/* 获取当前页面匹配.Destination的资源图像 */}}
{{ $hugoImage := $resource }}
{{/* 从资源中获取logo图像，透明背景图片效果最好 */}}
{{/* 该图像需要放置在根目录的assets/images目录下 */}}
{{ $logo := (resources.Get "img/watermark.png") }}
{{/* 检查图像的媒体类型是否不是gif或svg */}}
{{ if not (in (slice "gif" "svg") $hugoImage.MediaType.SubType) }}
    {{/* 保留原始图像的引用 */}}
    {{ $rawImage := $hugoImage }}
    {{/* 计算图像高度的80%，并确保最小值为250 */}}
    {{ $size := math.Round (mul $hugoImage.Height 0.80) }}
    {{ $size := cond (ge $size 250) $size 250.0 }}
    {{/* 调整logo的透明度为50% */}}
    {{ $logo := $logo.Filter (images.Opacity 0.5)  }}
    {{/* 调整logo的大小，高度为计算出的$size，保持纵横比，圆角半径为30 */}}
    {{/* $logo := $logo.Resize (printf "%.0fx png r30" $size) */}}
    {{/* 如果原始图像有EXIF信息 */}}
    {{ with $rawImage.Exif }}
        {{/* 根据图像的方向调整图像的大小和旋转 */}}
        {{ if or (eq .Tags.Orientation 1) (eq .Tags.Orientation nil) }}
            {{ $hugoImage = $hugoImage.Resize (print $hugoImage.Width "x" $hugoImage.Height " webp") }}
        {{ else if eq .Tags.Orientation 3 }}
            {{ $hugoImage = $hugoImage.Resize (print $hugoImage.Width "x" $hugoImage.Height " webp r180") }}
        {{ else if eq .Tags.Orientation 6 }}
            {{ $hugoImage = $hugoImage.Resize (print $hugoImage.Height "x" $hugoImage.Width " webp r270") }}
        {{ else if eq .Tags.Orientation 8 }}
            {{ $hugoImage = $hugoImage.Resize (print $hugoImage.Height "x" $hugoImage.Width " webp r90") }}
        {{ end }}
    {{ else }}
        {{/* 如果没有EXIF信息，则只调整大小，不旋转 */}}
        {{ $hugoImage = $hugoImage.Resize (print $hugoImage.Width "x" $hugoImage.Height " webp") }}
    {{ end }}
    {{/* 在图像上添加logo水印，位置在图像的右下，fm可以通过unwatermarked关闭水印 */}}
    {{ if and (ge $hugoImage.Width 500) (ne .Page.Params.unwatermarked true) }}
        {{ $hugoImage = $hugoImage.Filter (images.Overlay $logo (sub $hugoImage.Width $logo.Width) (sub $hugoImage.Height $logo.Height)) }}
    {{ end }}
{{ end }}

{{ $image := $hugoImage }}
{{/* SVG and external images won't work with gallery layout, because their width and height attributes are unknown */}}
{{- $galleryImage := and $image.Height $image.Width -}}

<img src="{{ $image.RelPermalink }}"
	{{ with $image.Width }}width="{{ . }}"{{ end }}
	{{ with $image.Height }}height="{{ . }}"{{ end }}
	loading="lazy"
	{{ with $alt }}
		alt="{{ . }}"
	{{ end }}
	{{ if $galleryImage }}
		class="gallery-image" 
		data-flex-grow="{{ div (mul $image.Width 100) $image.Height }}"
		data-flex-basis="{{ div (mul $image.Width 240) $image.Height }}px"
	{{ end }}
>