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images: Fix WebP quality and hint parameters being ignored

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Fixes #14316
This commit is contained in:
Simon Heimlicher
2025-12-29 16:47:43 +01:00
committed by GitHub
parent b1f7e35a98
commit ea9675f6e7
12 changed files with 56 additions and 10 deletions
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internal/warpc/webp.go
+19 -5
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@@ -202,6 +202,10 @@ func (d *WebpCodec) DecodeConfig(r io.Reader) (image.Config, error) {
}
func (d *WebpCodec) Encode(w io.Writer, img image.Image) error {
return d.EncodeOptions(w, img, nil)
}
func (d *WebpCodec) EncodeOptions(w io.Writer, img image.Image, options map[string]any) error {
b := img.Bounds()
if b.Dx() >= 1<<16 || b.Dy() >= 1<<16 {
return errors.New("webp: image is too large to encode")
@@ -299,6 +303,20 @@ func (d *WebpCodec) Encode(w io.Writer, img image.Image) error {
// encodeGray
// decode
// config
opts := map[string]any{
"quality": d.quality, // a number between 0 and 100. Set to 0 for lossless.
"hint": d.hint, // drawing, icon, photo, picture, or text
"useSharpYuv": true, // Use sharp (and slow) RGB->YUV conversion.
}
// Override with per-image options if provided.
for _, key := range []string{"quality", "hint"} {
if v, ok := options[key]; ok {
opts[key] = v
}
}
message := Message[WebpInput]{
Header: Header{
Version: 1,
@@ -310,11 +328,7 @@ func (d *WebpCodec) Encode(w io.Writer, img image.Image) error {
Data: WebpInput{
Source: bytes.NewReader(imageBytes),
Destination: w,
Options: map[string]any{
"quality": d.quality, // a number between 0 and 100. Set to 0 for lossless.
"hint": d.hint, // drawing, icon, photo, picture, or text
"useSharpYuv": true, // Use sharp (and slow) RGB->YUV conversion.
},
Options: opts,
Params: map[string]any{
"width": bounds.Max.X,
"height": bounds.Max.Y,