photoprism/internal/thumb/resample.go

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package thumb
import (
"image"
"github.com/disintegration/imaging"
)
// Resample downscales an image and returns it.
func Resample(img image.Image, width, height int, opts ...ResampleOption) image.Image {
var resImg image.Image
method, filter, _ := ResampleOptions(opts...)
if method == ResampleFit {
resImg = imaging.Fit(img, width, height, filter)
} else if method == ResampleFillCenter {
resImg = imaging.Fill(img, width, height, imaging.Center, filter)
} else if method == ResampleFillTopLeft {
resImg = imaging.Fill(img, width, height, imaging.TopLeft, filter)
} else if method == ResampleFillBottomRight {
resImg = imaging.Fill(img, width, height, imaging.BottomRight, filter)
} else if method == ResampleResize {
resImg = imaging.Resize(img, width, height, filter)
}
return resImg
}