33 lines
589 B
Go
33 lines
589 B
Go
package transcoder
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import (
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"github.com/barnacs/compy/proxy"
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"github.com/chai2010/webp"
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"image/png"
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"net/http"
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)
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type Png struct{}
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func (t *Png) Transcode(w *proxy.ResponseWriter, r *proxy.ResponseReader, headers http.Header) error {
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img, err := png.Decode(r)
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if err != nil {
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return err
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}
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if SupportsWebP(headers) {
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w.Header().Set("Content-Type", "image/webp")
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options := webp.Options{
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Lossless: true,
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}
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if err = webp.Encode(w, img, &options); err != nil {
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return err
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}
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} else {
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if err = png.Encode(w, img); err != nil {
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return err
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}
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}
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return nil
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}
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