Generate grid in webp format

Finally found CGo-free WebP encoder: https://git.sr.ht/~jackmordaunt/go-libwebp/

go.mod

@@ -3,6 +3,7 @@ module instafix
 go 1.21.0
 
 require (
+	git.sr.ht/~jackmordaunt/go-libwebp v0.0.0-20231019055653-cea42bec9134
 	github.com/PuerkitoBio/goquery v1.8.1
 	github.com/PurpleSec/escape v1.0.0
 	github.com/ansrivas/fiberprometheus/v2 v2.6.1
@@ -30,6 +31,7 @@ require (
 	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
 	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/getsentry/sentry-go v0.25.0 // indirect
 	github.com/gofiber/adaptor/v2 v2.2.1 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
@@ -47,12 +49,17 @@ require (
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/common v0.45.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect
 	github.com/rogpeppe/go-internal v1.11.0 // indirect
 	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
 	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
+	golang.org/x/image v0.13.0 // indirect
 	golang.org/x/sys v0.14.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
+	modernc.org/libc v1.24.1 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.7.2 // indirect
 )

go.sum

@@ -1,3 +1,5 @@
+git.sr.ht/~jackmordaunt/go-libwebp v0.0.0-20231019055653-cea42bec9134 h1:Qu3jWrwaA+9A/ZA4OzI0fdM1URR2QOx4vabeTydBz3U=
+git.sr.ht/~jackmordaunt/go-libwebp v0.0.0-20231019055653-cea42bec9134/go.mod h1:v85uv0z/SMHuX2gVClIpfhIFEI0tUlsmOECy5WjSvqA=
 github.com/DataDog/zstd v1.5.5 h1:oWf5W7GtOLgp6bciQYDmhHHjdhYkALu6S/5Ni9ZgSvQ=
 github.com/DataDog/zstd v1.5.5/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
 github.com/PuerkitoBio/goquery v1.8.1 h1:uQxhNlArOIdbrH1tr0UXwdVFgDcZDrZVdcpygAcwmWM=
@@ -33,6 +35,8 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/getsentry/sentry-go v0.25.0 h1:q6Eo+hS+yoJlTO3uu/azhQadsD8V+jQn2D8VvX1eOyI=
 github.com/getsentry/sentry-go v0.25.0/go.mod h1:lc76E2QywIyW8WuBnwl8Lc4bkmQH4+w1gwTf25trprY=
 github.com/go-errors/errors v1.4.2 h1:J6MZopCL4uSllY1OfXM374weqZFFItUbrImctkmUxIA=
@@ -89,6 +93,8 @@ github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lne
 github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
 github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo=
 github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
 github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
@@ -125,6 +131,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
+golang.org/x/image v0.13.0 h1:3cge/F/QTkNLauhf2QoE9zp+7sr+ZcL4HnoZmdwg9sg=
+golang.org/x/image v0.13.0/go.mod h1:6mmbMOeV28HuMTgA6OSRkdXKYw/t5W9Uwn2Yv1r3Yxk=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
@@ -190,3 +198,9 @@ google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs
 google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.24.1 h1:uvJSeCKL/AgzBo2yYIPPTy82v21KgGnizcGYfBHaNuM=
+modernc.org/libc v1.24.1/go.mod h1:FmfO1RLrU3MHJfyi9eYYmZBfi/R+tqZ6+hQ3yQQUkak=
+modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
+modernc.org/mathutil v1.6.0/go.mod h1:Ui5Q9q1TR2gFm0AQRqQUaBWFLAhQpCwNcuhBOSedWPo=
+modernc.org/memory v1.7.2 h1:Klh90S215mmH8c9gO98QxQFsY+W451E8AnzjoE2ee1E=
+modernc.org/memory v1.7.2/go.mod h1:NO4NVCQy0N7ln+T9ngWqOQfi7ley4vpwvARR+Hjw95E=

handlers/grid.go

@@ -2,7 +2,6 @@ package handlers
 
 import (
 	"bytes"
-	"image/jpeg"
 	data "instafix/handlers/data"
 	"instafix/utils"
 	"io"
@@ -14,6 +13,7 @@ import (
 	"sync"
 	"time"
 
+	"git.sr.ht/~jackmordaunt/go-libwebp/webp"
 	"github.com/gofiber/fiber/v2"
 	gim "github.com/ozankasikci/go-image-merge"
 	"go.uber.org/ratelimit"
@@ -34,7 +34,7 @@ var rl = ratelimit.New(1)
 func Grid() fiber.Handler {
 	return func(c *fiber.Ctx) error {
 		postID := c.Params("postID")
-		gridFname := filepath.Join("static", postID+".jpeg")
+		gridFname := filepath.Join("static", postID+".webp")
 
 		// If already exists, return
 		if _, err := os.Stat(gridFname); err == nil {
@@ -129,8 +129,7 @@ func Grid() fiber.Handler {
 			return c.SendStatus(fiber.StatusInternalServerError)
 		}
 		defer f.Close()
-		jpeg.Encode(f, grid, &jpeg.Options{Quality: 75})
-
+		webp.Encode(f, grid, webp.Quality(0.75))
 		return c.SendFile(gridFname)
 	}
 }