text overlay x & y pos as params

cmd/mxl-pattern/main.go

@@ -31,7 +31,10 @@ type appArgs struct {
 	audioFlowDefFile string
 	pattern          string
 	listPatterns     bool
-	textOverlay      string
+
+	textOverlay string
+	overlayX    int
+	overlayY    int
 
 	videoWidth  uint
 	videoHeight uint
@@ -249,7 +252,11 @@ func flagSetAddFlags(fs *pflag.FlagSet, args *appArgs) {
 	// Video pattern flags
 	fs.StringVarP(&args.pattern, "pattern", "p", "bars", "Video pattern type")
 	fs.BoolVar(&args.listPatterns, "list-patterns", false, "List video available video patterns and exit")
+
 	fs.StringVarP(&args.textOverlay, "text", "t", "", "Text overlay above video pattern")
+	fs.IntVar(&args.overlayX, "text-x", 0, "Text overlay X position in px")
+	fs.IntVar(&args.overlayY, "text-y", 0, "Text overlay Y position in px")
+
 	fs.UintVar(&args.videoWidth, "width", 1920, "Video pattern width")
 	fs.UintVar(&args.videoHeight, "height", 1080, "Video pattern height")
 	fs.StringVar(&args.videoFPS, "fps", "25", "Video pattern FPS")
@@ -341,7 +348,20 @@ func main() {
 			log.Fatalf("text overlay init failed: %v", err)
 		}
 		defer face.Close()
-		overlay, err = generator.NewTextOverlay(args.textOverlay, int(vi.width), int(vi.height), face)
+		if args.overlayX < 0 ||
+			args.overlayX > int(vi.width) ||
+			args.overlayY < 0 ||
+			args.overlayY > int(vi.height) {
+			log.Fatalf("Overlay X/Y pos can't be negative or greater, than video width/height")
+		}
+		overlay, err = generator.NewTextOverlay(
+			args.textOverlay,
+			int(vi.width),
+			int(vi.height),
+			args.overlayX,
+			args.overlayY,
+			face,
+		)
 		if err != nil {
 			log.Fatalf("text overlay init failed: %v", err)
 		}