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Fix: Avoid error on image type assertion in thumbnail generation

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Use imaging.Clone to ensure the image is always *image.NRGBA, preventing panics when decoding non-NRGBA images (e.g., JPEGs as *image.YCbCr).
This commit is contained in:
Ralph Slooten
2026-01-25 09:47:06 +13:00
parent 291c449591
commit b9f36312d7
1 changed files with 5 additions and 4 deletions
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9
server/apiv1/thumbnails.go
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@@ -76,13 +76,14 @@ func Thumbnail(w http.ResponseWriter, r *http.Request) {
var b bytes.Buffer
foo := bufio.NewWriter(&b)
var dstImageFill *image.NRGBA
var temp image.Image
if img.Bounds().Dx() < thumbWidth || img.Bounds().Dy() < thumbHeight {
dstImageFill = imaging.Fit(img, thumbWidth, thumbHeight, imaging.Lanczos).(*image.NRGBA)
temp = imaging.Fit(img, thumbWidth, thumbHeight, imaging.Lanczos)
} else {
dstImageFill = imaging.Fill(img, thumbWidth, thumbHeight, imaging.Center, imaging.Lanczos).(*image.NRGBA)
temp = imaging.Fill(img, thumbWidth, thumbHeight, imaging.Center, imaging.Lanczos)
}
dstImageFill := imaging.Clone(temp)
// create white image and paste image over the top
// preventing black backgrounds for transparent GIF/PNG images
dst := imaging.New(thumbWidth, thumbHeight, color.White)