From 1bdf0a94246643104c91323159df67ba65fea9e9 Mon Sep 17 00:00:00 2001
From: sneak <sneak@sneak.berlin>
Date: Thu, 8 Jan 2026 13:10:34 -0800
Subject: [PATCH] Implement AVIF decoding support

- Add github.com/gen2brain/avif dependency (CGO-free, WASM-based)
- Update decode() to try AVIF after WebP
- Add AVIF to SupportedInputFormats()
---
 go.mod                         |  1 +
 go.sum                         |  2 ++
 internal/imgcache/processor.go | 10 ++++++++++
 3 files changed, 13 insertions(+)

diff --git a/go.mod b/go.mod
index 4eec534..bdfdd7b 100644
--- a/go.mod
+++ b/go.mod
@@ -57,6 +57,7 @@ require (
 	github.com/fatih/color v1.16.0 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/gen2brain/avif v0.4.4 // indirect
 	github.com/gen2brain/webp v0.5.5 // indirect
 	github.com/go-jose/go-jose/v4 v4.0.5 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
diff --git a/go.sum b/go.sum
index 0e081d6..7d6dce6 100644
--- a/go.sum
+++ b/go.sum
@@ -112,6 +112,8 @@ github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv
 github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
 github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
 github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
+github.com/gen2brain/avif v0.4.4 h1:Ga/ss7qcWWQm2bxFpnjYjhJsNfZrWs5RsyklgFjKRSE=
+github.com/gen2brain/avif v0.4.4/go.mod h1:/XCaJcjZraQwKVhpu9aEd9aLOssYOawLvhMBtmHVGqk=
 github.com/gen2brain/webp v0.5.5 h1:MvQR75yIPU/9nSqYT5h13k4URaJK3gf9tgz/ksRbyEg=
 github.com/gen2brain/webp v0.5.5/go.mod h1:xOSMzp4aROt2KFW++9qcK/RBTOVC2S9tJG66ip/9Oc0=
 github.com/getsentry/sentry-go v0.40.0 h1:VTJMN9zbTvqDqPwheRVLcp0qcUcM+8eFivvGocAaSbo=
diff --git a/internal/imgcache/processor.go b/internal/imgcache/processor.go
index ca2a60f..c101c23 100644
--- a/internal/imgcache/processor.go
+++ b/internal/imgcache/processor.go
@@ -12,6 +12,7 @@ import (
 	"io"
 
 	"github.com/disintegration/imaging"
+	goavif "github.com/gen2brain/avif"
 	gowebp "github.com/gen2brain/webp"
 	"golang.org/x/image/webp"
 )
@@ -121,6 +122,7 @@ func (p *ImageProcessor) SupportedInputFormats() []string {
 		string(MIMETypePNG),
 		string(MIMETypeGIF),
 		string(MIMETypeWebP),
+		string(MIMETypeAVIF),
 	}
 }
 
@@ -152,6 +154,14 @@ func (p *ImageProcessor) decode(data []byte) (image.Image, string, error) {
 		return img, "webp", nil
 	}
 
+	// Try AVIF
+	r.Reset(data)
+
+	img, err = goavif.Decode(r)
+	if err == nil {
+		return img, "avif", nil
+	}
+
 	return nil, "", fmt.Errorf("unsupported image format")
 }