feat(imgs): be more explicit about quality setting

commit: 0c55143
parent: 0365902
author: Eric Bower
date: 2022-09-26 03:17:54 +0000 UTC

feat(imgs): be more explicit about quality setting

Also change resize algo to nearest neighbor

3 files changed, +8, -1

M filehandlers/imgs/img.go

M imgs/api.go

M shared/img.go

M filehandlers/imgs/img.go

+4, -0

 1@@ -55,8 +55,12 @@ func (h *UploadImgHandler) metaImg(data *PostMetaData) error {
 2 	}
 3 
 4 	opt := shared.NewImgOptimizer(h.Cfg.Logger, "")
 5+	// for small images we want to preserve quality
 6+	// since it can have a dramatic effect
 7 	if data.FileSize < 3*MB {
 8 		opt.Quality = 100
 9+	} else {
10+		opt.Quality = 80
11 	}
12 
13 	contents := &bytes.Buffer{}

M imgs/api.go

+3, -0

 1@@ -239,6 +239,9 @@ func imgHandler(w http.ResponseWriter, h *ImgHandler) {
 2 	resizeImg := h.Img.Width != 0 || h.Img.Height != 0
 3 
 4 	if h.Optimized && resizeImg {
 5+		// when resizing an image we don't want to mess with quality
 6+		// since that was already applied when converting to webp
 7+		h.Img.Quality = 100
 8 		err = h.Img.Process(w, contents)
 9 	} else {
10 		_, err = io.Copy(w, contents)

M shared/img.go

+1, -1

1@@ -109,7 +109,7 @@ func (h *ImgOptimizer) DecodeWebp(r io.Reader) (image.Image, error) {
2 			img,
3 			h.Width,
4 			h.Height,
5-			imaging.MitchellNetravali,
6+			imaging.NearestNeighbor,
7 		), nil
8 	}
9