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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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6
resources/images/config.go
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@@ -171,7 +171,7 @@ func DecodeConfig(in map[string]any) (*config.ConfigNamespace[ImagingConfig, Ima
return i, nil, err
}
i.BgColor, err = hexStringToColor(i.Imaging.BgColor)
i.BgColor, err = hexStringToColorGo(i.Imaging.BgColor)
if err != nil {
return i, nil, err
}
@@ -230,7 +230,7 @@ func DecodeImageConfig(action string, options []string, defaults *config.ConfigN
c.Hint = hint
} else if part[0] == '#' {
c.BgColorStr = part[1:]
c.BgColor, err = hexStringToColor(c.BgColorStr)
c.BgColor, err = hexStringToColorGo(c.BgColorStr)
if err != nil {
return c, err
}
@@ -424,7 +424,7 @@ type ImagingConfigInternal struct {
func (i *ImagingConfigInternal) Compile(externalCfg *ImagingConfig) error {
var err error
i.BgColor, err = hexStringToColor(externalCfg.BgColor)
i.BgColor, err = hexStringToColorGo(externalCfg.BgColor)
if err != nil {
return err
}