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https://github.com/gohugoio/hugo.git
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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
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
// Copyright 2020 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package images
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import (
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"fmt"
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"image"
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"image/draw"
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"github.com/disintegration/gift"
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)
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var _ gift.Filter = (*overlayFilter)(nil)
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type overlayFilter struct {
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src ImageSource
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x, y int
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}
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func (f overlayFilter) Draw(dst draw.Image, src image.Image, options *gift.Options) {
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overlaySrc, err := f.src.DecodeImage()
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if err != nil {
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panic(fmt.Sprintf("failed to decode image: %s", err))
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}
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gift.New().Draw(dst, src)
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gift.New().DrawAt(dst, overlaySrc, image.Pt(f.x, f.y), gift.OverOperator)
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}
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func (f overlayFilter) Bounds(srcBounds image.Rectangle) image.Rectangle {
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return image.Rect(0, 0, srcBounds.Dx(), srcBounds.Dy())
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}
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