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// Copyright 2024 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 (
"image"
"github.com/gohugoio/hugo/resources/images/exif"
"github.com/gohugoio/hugo/resources/resource"
)
// ImageResource represents an image resource.
type ImageResource interface {
resource.Resource
ImageResourceOps
}
type ImageResourceOps interface {
// Height returns the height of the Image.
Height() int
// Width returns the width of the Image.
Width() int
// Process applies the given image processing options to the image.
Process(spec string) (ImageResource, error)
// Crop an image to match the given dimensions without resizing.
// You must provide both width and height.
// Use the anchor option to change the crop box anchor point.
// {{ $image := $image.Crop "600x400" }}
Crop(spec string) (ImageResource, error)
// Fill scales the image to the smallest possible size that will cover the specified dimensions in spec,
// crops the resized image to the specified dimensions using the given anchor point.
// The spec is space delimited, e.g. `200x300 TopLeft`.
Fill(spec string) (ImageResource, error)
// Fit scales down the image using the given spec.
Fit(spec string) (ImageResource, error)
// Resize resizes the image to the given spec. If one of width or height is 0, the image aspect
// ratio is preserved.
Resize(spec string) (ImageResource, error)
// Filter applies one or more filters to an Image.
// {{ $image := $image.Filter (images.GaussianBlur 6) (images.Pixelate 8) }}
Filter(filters ...any) (ImageResource, error)
// Exif returns an ExifInfo object containing Image metadata.
Exif() *exif.ExifInfo
// Colors returns a slice of the most dominant colors in an image
// using a simple histogram method.
Colors() ([]Color, error)
// For internal use.
DecodeImage() (image.Image, error)
}
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