added fbs reader with an example usage main function

example/file-reader/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"image"
+	"os"
+	vnc "vnc2webm"
+	"vnc2webm/encoders"
+	"vnc2webm/logger"
+	"path/filepath"
+)
+
+func main() {
+
+	if len(os.Args) <= 1 {
+		logger.Errorf("please provide a fbs file name")
+		return
+	}
+	if _, err := os.Stat(os.Args[1]); os.IsNotExist(err) {
+		logger.Errorf("File doesn't exist", err)
+		return
+	}
+	encs := []vnc.Encoding{
+		&vnc.RawEncoding{},
+		&vnc.TightEncoding{},
+	}
+
+	fbs, err := vnc.NewFbsConn(
+		os.Args[1],
+		encs,
+	)
+	if err != nil {
+		logger.Error("failed to open fbs reader:", err)
+		//return nil, err
+	}
+
+	//launch video encoding process:
+	vcodec := &encoders.X264ImageEncoder{}
+	//vcodec := &encoders.DV8ImageEncoder{}
+	//vcodec := &encoders.DV9ImageEncoder{}
+	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
+	logger.Debugf("current dir: %s", dir)
+	go vcodec.Run("./ffmpeg", "./output.mp4")
+
+	screenImage := image.NewRGBA(image.Rect(0, 0, int(fbs.Width()), int(fbs.Height())))
+	for _, enc := range encs {
+		myRenderer, ok := enc.(vnc.Renderer)
+
+		if ok {
+			myRenderer.SetTargetImage(screenImage)
+		}
+	}
+
+
+	msgReader := vnc.NewFBSPlayHelper(fbs)
+
+	//loop over all messages, feed images to video codec:
+	for {
+		msgReader.ReadFbsMessage()
+		vcodec.Encode(screenImage)
+	}
+}