proof of concept: Encode and Decode using the libwebp library via WASM

Note that this works, but the building blocks are quickly thrown together just to get a sense if this makes sense to go forward with.

See #12843

Author: bep

go.mod

@@ -22,6 +22,7 @@ require (
 	github.com/bep/overlayfs v0.10.0
 	github.com/bep/simplecobra v0.6.1
 	github.com/bep/tmc v0.5.1
+	github.com/bep/webptemp v0.0.0-20251202110834-92f833957f2b
 	github.com/bits-and-blooms/bitset v1.24.4
 	github.com/cespare/xxhash/v2 v2.3.0
 	github.com/clbanning/mxj/v2 v2.7.0

go.sum

@@ -178,6 +178,8 @@ github.com/bep/simplecobra v0.6.1 h1:ORBAC5CSar99/NPZ5fCthCx/uvlm7ry58wwDsZ23a20
 github.com/bep/simplecobra v0.6.1/go.mod h1:hmtjyHv6xwD637ScIRP++0NKkR5szrHuMw5BxMUH66s=
 github.com/bep/tmc v0.5.1 h1:CsQnSC6MsomH64gw0cT5f+EwQDcvZz4AazKunFwTpuI=
 github.com/bep/tmc v0.5.1/go.mod h1:tGYHN8fS85aJPhDLgXETVKp+PR382OvFi2+q2GkGsq0=
+github.com/bep/webptemp v0.0.0-20251202110834-92f833957f2b h1:yy1aEC9FSn35GsninCuHIEiXXh2dbwc579NVgXVLUkA=
+github.com/bep/webptemp v0.0.0-20251202110834-92f833957f2b/go.mod h1:v75l/Bf01VyaXGbNjpxF96GD/pgdp6v9fkRCfdMtQrQ=
 github.com/bep/workers v1.0.0 h1:U+H8YmEaBCEaFZBst7GcRVEoqeRC9dzH2dWOwGmOchg=
 github.com/bep/workers v1.0.0/go.mod h1:7kIESOB86HfR2379pwoMWNy8B50D7r99fRLUyPSNyCs=
 github.com/bits-and-blooms/bitset v1.24.4 h1:95H15Og1clikBrKr/DuzMXkQzECs1M6hhoGXLwLQOZE=

resources/image.go

@@ -42,7 +42,7 @@ import (
 	"github.com/gohugoio/hugo/resources/images"
 
 	// Blind import for image.Decode
-	_ "golang.org/x/image/webp"
+	_ "github.com/bep/webptemp"
 )
 
 var (

resources/image_extended_test.go

@@ -11,8 +11,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build extended
-
 package resources_test
 
 import (

resources/images/webp/webp.go

@@ -11,22 +11,27 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build extended
-
 package webp
 
 import (
 	"image"
 	"io"
 
-	"github.com/bep/gowebp/libwebp"
+	webp "github.com/bep/webptemp"
+
 	"github.com/bep/gowebp/libwebp/webpoptions"
 )
 
 // Encode writes the Image m to w in Webp format with the given
 // options.
 func Encode(w io.Writer, m image.Image, o webpoptions.EncodingOptions) error {
-	return libwebp.Encode(w, m, o)
+	oo := webp.Options{
+		Lossless: false,
+		Quality:  o.Quality,
+		Method:   4,
+		Exact:    false,
+	}
+	return webp.Encode(w, m, oo)
 }
 
 // Supports returns whether webp encoding is supported in this build.

resources/images/webp/webp_notavailable.go

@@ -35,7 +35,7 @@ import (
 	_ "image/png"
 
 	// Import webp codec
-	_ "golang.org/x/image/webp"
+	_ "github.com/bep/webptemp"
 
 	"github.com/gohugoio/hugo/deps"
 	"github.com/spf13/afero"