base image + skeleton for loading config file

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"image"
 	_ "image/jpeg"
 	_ "image/png"
 )
@@ -10,10 +11,17 @@ func main() {
 	// command line arguments
 	flag.StringVar(&ConfigRegister.Method, "blending", "darken", "Blending methods : darken, lighten, fuckyfun")
 	flag.StringVar(&ConfigRegister.OutputDir, "output", "./", "Output directory")
+	flag.StringVar(&ConfigRegister.BaseImage, "base-img", "", "Path to the base image to work with. Random image if not set")
 	flag.Parse()
 
 	// get two random images and load them
-	img1 := loadImage(getRandomImage())
+	var img1 image.Image
+	if ConfigRegister.BaseImage != "" {
+		img1 = loadImage(ConfigRegister.BaseImage)
+	} else {
+		img1 = loadImage(getRandomImage())
+	}
+
 	img2 := loadImage(getRandomImage())
 
 	// pool of workers unionizing, ready to blend a new picture using the power of friendship