54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package thumb
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import (
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"fmt"
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"image"
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"image/png"
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"path/filepath"
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"runtime/debug"
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"github.com/disintegration/imaging"
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"github.com/photoprism/photoprism/pkg/clean"
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"github.com/photoprism/photoprism/pkg/fs"
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)
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// Png converts an image to PNG, saves it, and returns it.
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func Png(srcFile, pngFile string, orientation int) (img image.Image, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("png: %s (panic)\nstack: %s", r, debug.Stack())
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log.Error(err)
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}
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}()
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// Resolve symlinks.
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if srcFile, err = fs.Resolve(srcFile); err != nil {
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log.Debugf("png: %s in %s (resolve filename)", err, clean.Log(srcFile))
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return img, err
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}
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// Open source image.
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img, err = imaging.Open(srcFile)
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// Failed?
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if err != nil {
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log.Debugf("png: failed to open %s", clean.Log(filepath.Base(srcFile)))
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return img, err
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}
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// Adjust orientation.
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if orientation > 1 {
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img = Rotate(img, orientation)
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}
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// Save PNG file.
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if err = imaging.Save(img, pngFile, imaging.PNGCompressionLevel(png.BestCompression)); err != nil {
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log.Errorf("png: failed to save %s", clean.Log(filepath.Base(pngFile)))
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return img, err
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}
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// Return PNG image.
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return img, nil
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}
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