Add ZipLevel, issue #48

cbconvert.go

@@ -23,6 +23,8 @@ type Options struct {
 	Format string
 	// Archive format, valid values are zip, tar
 	Archive string
+	// ZIP compression level: -1 default, 0 store (no compression), 1-9 deflate (1 fastest, 9 smallest)
+	ZipLevel int
 	// JPEG image quality
 	Quality int
 	// Encoder speed/effort, format-specific: webp method 0-6, avif speed 0-10, jxl effort 1-10; -1 uses the format default
@@ -137,6 +139,7 @@ func NewOptions() Options {
 	o.Archive = "zip"
 	o.Quality = 75
 	o.Effort = -1
+	o.ZipLevel = -1
 	o.Filter = 2
 
 	return o