Fixes

README.md

@@ -62,6 +62,29 @@ rsz --generate-man | sudo gzip > /usr/share/man/man1/rsz.1.gz
 ### Usage
 
 ```
+Usage: rsz {options} src-image size output-image
+
+Options
+
+  --filter, -f name     Resampling filter name
+  --list-filters, -F    Print list of supported resampling filters
+  --no-color, -nc       Disable colors in output
+  --help, -h            Show this help message
+  --version, -v         Show version
+
+Examples
+
+  rsz image.png 256x256 thumbnail.png
+  Convert image to exact size
+
+  rsz -f Lanczos image.png 256x256 thumbnail.png
+  Convert image to exact size using Lanczos resampling filter
+
+  rsz image.png 25% thumbnail.png
+  Convert image to relative size (25% of original)
+
+  rsz image.png 0.55 thumbnail.png
+  Convert image to relative size (55% of original)
 
 ```
 

rsz.go

@@ -34,7 +34,7 @@ import (
 // Basic utility info
 const (
 	APP  = "rsz"
-	VER  = "0.0.1"
+	VER  = "0.0.2"
 	DESC = "Simple utility for image resizing"
 )
 
@@ -401,7 +401,8 @@ func genMan() int {
 func genUsage() *usage.Info {
 	info := usage.NewInfo("", "src-image", "size", "output-image")
 
-	info.AddOption(OPT_FILTER, "Resampling filter name")
+	info.AddOption(OPT_FILTER, "Resampling filter name", "name")
+	info.AddOption(OPT_LIST_FILTERS, "Print list of supported resampling filters")
 	info.AddOption(OPT_NO_COLOR, "Disable colors in output")
 	info.AddOption(OPT_HELP, "Show this help message")
 	info.AddOption(OPT_VER, "Show version")
@@ -411,6 +412,11 @@ func genUsage() *usage.Info {
 		"Convert image to exact size",
 	)
 
+	info.AddExample(
+		"-f Lanczos image.png 256x256 thumbnail.png",
+		"Convert image to exact size using Lanczos resampling filter",
+	)
+
 	info.AddExample(
 		"image.png 25% thumbnail.png",
 		"Convert image to relative size (25% of original)",