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Add Luminance to Color

Browse source 
To sort an image's colors from darkest to lightest, you can then do:

```handlebars
{{ {{ $colorsByLuminance := sort $image.Colors "Luminance" }}
```

This uses the formula defined here: https://www.w3.org/TR/WCAG21/#dfn-relative-luminance

Fixes #10450
This commit is contained in:
Bjørn Erik Pedersen 2024-04-15 10:09:25 +02:00
parent 74e9129568
commit e197c7b29d
12 changed files with 204 additions and 39 deletions
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2
resources/transform.go
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@ -263,7 +263,7 @@ func (r *resourceAdapter) Exif() *exif.ExifInfo {
return r.getImageOps().Exif()
}
func (r *resourceAdapter) Colors() ([]string, error) {
func (r *resourceAdapter) Colors() ([]images.Color, error) {
return r.getImageOps().Colors()
}