Open loeffel-io opened 3 years ago
Hey, i am currently try to compress png and jpg images with lilliput.
While i am uploading pngs the png file sizes are larger then before - with all kind of compression levels (1 to 9):
var EncodeOptions = map[string]map[int]int{ matchers.TypeJpeg.Extension: {lilliput.JpegQuality: 85}, matchers.TypePng.Extension: {lilliput.PngCompression: 9}, } var fileType types.Type if fileType = filetype.MatchMap(buf.Bytes(), matchers.Map{ matchers.TypeJpeg: matchers.Jpeg, matchers.TypePng: matchers.Png, }); fileType == filetype.Unknown { c.AbortWithStatusJSON(h.StatusBadRequest, http.Response(fmt.Errorf("filetype unsupported"), nil)) return } if decoder, err = lilliput.NewDecoder(buf.Bytes()); err != nil { c.AbortWithStatusJSON(h.StatusInternalServerError, http.Response(err, nil)) return } defer func() { decoder.Close() }() if header, err = decoder.Header(); err != nil { c.AbortWithStatusJSON(h.StatusInternalServerError, http.Response(err, nil)) return } var ops = lilliput.NewImageOps(8192) defer func() { ops.Close() }() var opts = &lilliput.ImageOptions{ FileType: fmt.Sprintf(".%s", fileType.Extension), Width: header.Width(), Height: header.Height(), ResizeMethod: lilliput.ImageOpsResize, NormalizeOrientation: false, EncodeOptions: EncodeOptions[fileType.Extension], } var data = make([]byte, maxSize) if data, err = ops.Transform(decoder, opts, data); err != nil { c.AbortWithStatusJSON(h.StatusInternalServerError, http.Response(err, nil)) return } log.Printf("%d:%d", len(buf.Bytes()), len(data)) // 112319:270094
Before (112 KB)
After (270 KB)
pngCompression 1
the result is 112319:408167
112319:408167
the origin image is png8 to png32.. so the image is larger. so if have some func keep png8~ everything will be ok.
so there is no support for png8?
Hey, i am currently try to compress png and jpg images with lilliput.
While i am uploading pngs the png file sizes are larger then before - with all kind of compression levels (1 to 9):
Before (112 KB)
After (270 KB)
pngCompression 1
the result is
112319:408167