mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-01 07:21:05 -05:00
e197c7b29d
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
145 lines
3.8 KiB
Go
145 lines
3.8 KiB
Go
// Copyright 2021 The Hugo Authors. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package resources
|
|
|
|
import (
|
|
"context"
|
|
"image"
|
|
|
|
"github.com/gohugoio/hugo/common/hugio"
|
|
"github.com/gohugoio/hugo/common/maps"
|
|
"github.com/gohugoio/hugo/media"
|
|
"github.com/gohugoio/hugo/resources/images"
|
|
"github.com/gohugoio/hugo/resources/images/exif"
|
|
"github.com/gohugoio/hugo/resources/resource"
|
|
)
|
|
|
|
var (
|
|
_ error = (*errorResource)(nil)
|
|
// Image covers all current Resource implementations.
|
|
_ images.ImageResource = (*errorResource)(nil)
|
|
// The list of user facing and exported interfaces in resource.go
|
|
// Note that if we're missing some interface here, the user will still
|
|
// get an error, but not as pretty.
|
|
_ resource.ContentResource = (*errorResource)(nil)
|
|
_ resource.ReadSeekCloserResource = (*errorResource)(nil)
|
|
_ resource.ResourcesLanguageMerger = (*resource.Resources)(nil)
|
|
// Make sure it also fails when passed to a pipe function.
|
|
_ ResourceTransformer = (*errorResource)(nil)
|
|
)
|
|
|
|
// NewErrorResource wraps err in a Resource where all but the Err method will panic.
|
|
func NewErrorResource(err resource.ResourceError) resource.Resource {
|
|
return &errorResource{ResourceError: err}
|
|
}
|
|
|
|
type errorResource struct {
|
|
resource.ResourceError
|
|
}
|
|
|
|
func (e *errorResource) Err() resource.ResourceError {
|
|
return e.ResourceError
|
|
}
|
|
|
|
func (e *errorResource) ReadSeekCloser() (hugio.ReadSeekCloser, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Content(context.Context) (any, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) ResourceType() string {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) MediaType() media.Type {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Permalink() string {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) RelPermalink() string {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Name() string {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Title() string {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Params() maps.Params {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Data() any {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Height() int {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Width() int {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Process(spec string) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Crop(spec string) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Fill(spec string) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Fit(spec string) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Resize(spec string) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Filter(filters ...any) (images.ImageResource, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Exif() *exif.ExifInfo {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Colors() ([]images.Color, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) DecodeImage() (image.Image, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) Transform(...ResourceTransformation) (ResourceTransformer, error) {
|
|
panic(e.ResourceError)
|
|
}
|
|
|
|
func (e *errorResource) TransformWithContext(context.Context, ...ResourceTransformation) (ResourceTransformer, error) {
|
|
panic(e.ResourceError)
|
|
}
|