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47 lines
1.7 KiB
Go
47 lines
1.7 KiB
Go
package processing
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import (
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"github.com/imgproxy/imgproxy/v3/imagedata"
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"github.com/imgproxy/imgproxy/v3/imath"
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"github.com/imgproxy/imgproxy/v3/options"
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"github.com/imgproxy/imgproxy/v3/vips"
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)
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func extendImage(img *vips.Image, resultWidth, resultHeight int, opts *options.ExtendOptions, offsetScale float64, extendAr bool) error {
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if !opts.Enabled || (resultWidth <= img.Width() && resultHeight <= img.Height()) || resultWidth == 0 || resultHeight == 0 {
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return nil
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}
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if extendAr && resultWidth > img.Width() && resultHeight > img.Height() {
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diffW := float64(resultWidth) / float64(img.Width())
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diffH := float64(resultHeight) / float64(img.Height())
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switch {
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case diffH > diffW:
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resultHeight = imath.Scale(img.Width(), float64(resultHeight)/float64(resultWidth))
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resultWidth = img.Width()
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case diffW > diffH:
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resultWidth = imath.Scale(img.Height(), float64(resultWidth)/float64(resultHeight))
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resultHeight = img.Height()
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default:
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// The image has the requested arpect ratio
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return nil
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}
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}
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offX, offY := calcPosition(resultWidth, resultHeight, img.Width(), img.Height(), &opts.Gravity, offsetScale, false)
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return img.Embed(resultWidth, resultHeight, offX, offY)
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}
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func extend(pctx *pipelineContext, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error {
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resultWidth, resultHeight := resultSize(po, pctx.dprScale)
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return extendImage(img, resultWidth, resultHeight, &po.Extend, pctx.dprScale, false)
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}
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func extendAspectRatio(pctx *pipelineContext, img *vips.Image, po *options.ProcessingOptions, imgdata *imagedata.ImageData) error {
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resultWidth, resultHeight := resultSize(po, pctx.dprScale)
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return extendImage(img, resultWidth, resultHeight, &po.ExtendAspectRatio, pctx.dprScale, true)
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}
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