images.Opacity
文法
images.Opacity OPACITY
戻り値
images.filter
The opacity value must be in the range [0, 1]. A value of 0 produces a transparent image, and a value of 1 produces an opaque image (no transparency).
Usage
Create the filter:
{{ $filter := images.Opacity 0.65 }}
Apply the filter using the images.Filter function:
{{ with resources.Get "images/original.jpg" }}
{{ with . | images.Filter $filter }}
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
{{ end }}
{{ end }}
You can also apply the filter using the Filter method on a Resource object:
{{ with resources.Get "images/original.jpg" }}
{{ with .Filter $filter }}
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
{{ end }}
{{ end }}
The images.Opacity filter is most useful for target formats such as PNG and WebP that support transparency. If the source image does not support transparency, combine this filter with the images.Process filter:
{{ with resources.Get "images/original.jpg" }}
{{ $filters := slice
(images.Opacity 0.65)
(images.Process "png")
}}
{{ with . | images.Filter $filters }}
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
{{ end }}
{{ end }}
Example
Original
Processed
