mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-29 08:22:06 -05:00
3ba147e702
This allows for constructs ala:
```
{{ $overlay := $img.Filter (images.Overlay $logo 50 50 )}}
```
Or:
```
{{ $logoFilter := (images.Overlay $logo 50 50 ) }}
{{ $overlay := $img | images.Filter $logoFilter }}
```
Which will overlay the logo in the top left corner (x=50, y=50) of `$img`.
Fixes #8057
Fixes #4595
Updates #6731
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Copyright 2020 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 images
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"image/draw"
|
|
|
|
"github.com/disintegration/gift"
|
|
)
|
|
|
|
var _ gift.Filter = (*overlayFilter)(nil)
|
|
|
|
type overlayFilter struct {
|
|
src ImageSource
|
|
x, y int
|
|
}
|
|
|
|
func (f overlayFilter) Draw(dst draw.Image, src image.Image, options *gift.Options) {
|
|
overlaySrc, err := f.src.DecodeImage()
|
|
if err != nil {
|
|
panic(fmt.Sprintf("failed to decode image: %s", err))
|
|
}
|
|
|
|
gift.New().Draw(dst, src)
|
|
gift.New().DrawAt(dst, overlaySrc, image.Pt(f.x, f.y), gift.OverOperator)
|
|
}
|
|
|
|
func (f overlayFilter) Bounds(srcBounds image.Rectangle) image.Rectangle {
|
|
return image.Rect(0, 0, srcBounds.Dx(), srcBounds.Dy())
|
|
}
|