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imgproxy/processing/extend.go

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2021-04-26 13:52:50 +02:00
package processing
import (
"github.com/imgproxy/imgproxy/v2/imagedata"
"github.com/imgproxy/imgproxy/v2/imath"
"github.com/imgproxy/imgproxy/v2/options"
"github.com/imgproxy/imgproxy/v2/vips"
)
func extend(pctx *pipelineContext, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error {
resultWidth := imath.Scale(po.Width, po.Dpr)
resultHeight := imath.Scale(po.Height, po.Dpr)
if !po.Extend.Enabled || (resultWidth <= img.Width() && resultHeight <= img.Height()) {
return nil
}
offX, offY := calcPosition(resultWidth, resultHeight, img.Width(), img.Height(), &po.Extend.Gravity, false)
return img.Embed(resultWidth, resultHeight, offX, offY)
}