diff --git a/encoding_copyrect.go b/encoding_copyrect.go
index 833cf2f..ffb214c 100644
--- a/encoding_copyrect.go
+++ b/encoding_copyrect.go
@@ -20,8 +20,13 @@ func (*CopyRectEncoding) Reset() error {
 }
 func (*CopyRectEncoding) Type() EncodingType { return EncCopyRect }
 
+func (enc *CopyRectEncoding) SetTargetImage(img draw.Image) {
+	//logger.Debugf("!!!!!!!!!!!!!setting image: %v", img.Bounds())
+	enc.Image = img
+}
+
 func (enc *CopyRectEncoding) Read(c Conn, rect *Rectangle) error {
-	logger.Debugf("Reading: CopyRect%v", rect)
+	logger.Debugf("Reading: CopyRect %v", rect)
 	if err := binary.Read(c, binary.BigEndian, &enc.SX); err != nil {
 		return err
 	}
@@ -30,7 +35,7 @@ func (enc *CopyRectEncoding) Read(c Conn, rect *Rectangle) error {
 	}
 	cpyIm := image.NewRGBA(image.Rectangle{Min: image.Point{0, 0}, Max: image.Point{int(rect.Width), int(rect.Height)}})
 	for x := 0; x < int(rect.Width); x++ {
-		for y := 0; x < int(rect.Height); y++ {
+		for y := 0; y < int(rect.Height); y++ {
 			col := enc.Image.At(x+int(enc.SX), y+int(enc.SY))
 			cpyIm.Set(x, y, col)
 		}
diff --git a/encoding_util.go b/encoding_util.go
index 76b9003..ff92a77 100644
--- a/encoding_util.go
+++ b/encoding_util.go
@@ -7,7 +7,6 @@ import (
 	"image/color"
 	"image/draw"
 	"io"
-	"vnc2video/logger"
 )
 
 func Min(a, b int) int {
@@ -25,28 +24,6 @@ func FillRect(img draw.Image, rect *image.Rectangle, c color.Color) {
 	}
 }
 
-func readRunLength(r io.Reader) (int, error) {
-	runLen := 1
-
-	mod, err := ReadUint8(r)
-	if err != nil {
-		logger.Errorf("renderZRLE: error while reading mod in plain RLE subencoding: %v", err)
-		return 0, err
-	}
-	runLen += int(mod)
-
-	for mod == 255 {
-		//mod = fromZlib.read();
-		mod, err = ReadUint8(r)
-		if err != nil {
-			logger.Errorf("renderZRLE: error while reading mod in-loop plain RLE subencoding: %v", err)
-			return 0, err
-		}
-		runLen += int(mod)
-	}
-	return runLen, nil
-}
-
 // Read unmarshal color from conn
 func ReadColor(c io.Reader, pf *PixelFormat) (*color.RGBA, error) {
 	if pf.TrueColor == 0 {
diff --git a/encoding_zrle.go b/encoding_zrle.go
index ad5c889..f94317e 100644
--- a/encoding_zrle.go
+++ b/encoding_zrle.go
@@ -298,7 +298,28 @@ func (enc *ZRLEEncoding) handlePlainRLETile(tileOffsetX int, tileOffsetY int, ti
 	return err
 }
 
-// Read unmarshal color from conn
+func readRunLength(r io.Reader) (int, error) {
+	runLen := 1
+
+	addition, err := ReadUint8(r)
+	if err != nil {
+		logger.Errorf("renderZRLE: error while reading addition to runLen in plain RLE subencoding: %v", err)
+		return 0, err
+	}
+	runLen += int(addition)
+
+	for addition == 255 {
+		addition, err = ReadUint8(r)
+		if err != nil {
+			logger.Errorf("renderZRLE: error while reading addition to runLen in-loop plain RLE subencoding: %v", err)
+			return 0, err
+		}
+		runLen += int(addition)
+	}
+	return runLen, nil
+}
+
+// Reads cpixel color from reader
 func readCPixel(c io.Reader, pf *PixelFormat) (*color.RGBA, error) {
 	if pf.TrueColor == 0 {
 		return nil, errors.New("support for non true color formats was not implemented")
@@ -307,7 +328,6 @@ func readCPixel(c io.Reader, pf *PixelFormat) (*color.RGBA, error) {
 	isZRLEFormat := IsCPixelSpecific(pf)
 	var col *color.RGBA
 	if isZRLEFormat {
-		//tbytes := make([]byte, 3)
 		tbytes, err := ReadBytes(3, c)
 		if err != nil {
 			return nil, err