diff --git a/lime/graphics/format/JPEG.hx b/lime/graphics/format/JPEG.hx
index 60a762601..35381fca6 100644
--- a/lime/graphics/format/JPEG.hx
+++ b/lime/graphics/format/JPEG.hx
@@ -1,6 +1,7 @@
 package lime.graphics.format;
 
 
+import haxe.io.Bytes;
 import lime.graphics.Image;
 import lime.graphics.ImageBuffer;
 import lime.system.System;
@@ -58,7 +59,16 @@ class JPEG {
 		
 		#elseif (sys && (!disable_cffi || !format))
 			
-			return lime_image_encode (image.buffer, 1, quality);
+			var data = lime_image_encode (image.buffer, 1, quality);
+			
+			#if neko
+			var bytes = @:privateAccess (new Bytes (data.length, data.b));
+			#else
+			var bytes = Bytes.ofString (data.b);
+			@:privateAccess (bytes).length = data.length;
+			#end
+			
+			return ByteArray.fromBytes (bytes);
 			
 		#end
 		
diff --git a/lime/graphics/format/PNG.hx b/lime/graphics/format/PNG.hx
index a34aa86b9..c56b5a903 100644
--- a/lime/graphics/format/PNG.hx
+++ b/lime/graphics/format/PNG.hx
@@ -1,6 +1,7 @@
 package lime.graphics.format;
 
 
+import haxe.io.Bytes;
 import lime.graphics.Image;
 import lime.system.System;
 import lime.utils.ByteArray;
@@ -67,7 +68,16 @@ class PNG {
 		
 		if (!System.disableCFFI) {
 			
-			return lime_image_encode (image.buffer, 0, 0);
+			var data = lime_image_encode (image.buffer, 0, 0);
+			
+			#if neko
+			var bytes = @:privateAccess (new Bytes (data.length, data.b));
+			#else
+			var bytes = Bytes.ofString (data.b);
+			@:privateAccess (bytes).length = data.length;
+			#end
+			
+			return byteArray;
 			
 		}
 		
diff --git a/project/include/utils/Bytes.h b/project/include/utils/Bytes.h
index 71e15b31a..d680b83c6 100644
--- a/project/include/utils/Bytes.h
+++ b/project/include/utils/Bytes.h
@@ -23,6 +23,8 @@ namespace lime {
 		const unsigned char *Data () const;
 		int Length () const;
 		void Resize (int size);
+		void Set (value bytes);
+		void Set (const QuickVec<unsigned char> data);
 		value Value ();
 		
 		unsigned char *_data;
diff --git a/project/src/graphics/format/JPEG.cpp b/project/src/graphics/format/JPEG.cpp
index 626d5caa0..7017112ad 100644
--- a/project/src/graphics/format/JPEG.cpp
+++ b/project/src/graphics/format/JPEG.cpp
@@ -361,7 +361,7 @@ namespace lime {
 		
 		jpeg_finish_compress (&cinfo);
 		
-		*bytes = Bytes (dest.mOutput);
+		bytes->Set (dest.mOutput);
 		
 		return true;
 		
diff --git a/project/src/graphics/format/PNG.cpp b/project/src/graphics/format/PNG.cpp
index 0bab1d617..661ac9996 100644
--- a/project/src/graphics/format/PNG.cpp
+++ b/project/src/graphics/format/PNG.cpp
@@ -295,7 +295,7 @@ namespace lime {
 		
 		png_write_end (png_ptr, NULL);
 		
-		*bytes = Bytes (out_buffer);
+		bytes->Set (out_buffer);
 		
 		return true;
 		
diff --git a/project/src/utils/Bytes.cpp b/project/src/utils/Bytes.cpp
index 4f126b797..36e7bd354 100644
--- a/project/src/utils/Bytes.cpp
+++ b/project/src/utils/Bytes.cpp
@@ -30,46 +30,7 @@ namespace lime {
 	
 	Bytes::Bytes (value bytes) {
 		
-		if (!init) {
-			
-			id_b = val_id ("b");
-			id_length = val_id ("length");
-			init = true;
-			
-		}
-		
-		if (val_is_null (bytes)) {
-			
-			_length = 0;
-			_data = 0;
-			_value = 0;
-			
-		} else {
-			
-			_value = bytes;
-			_length = val_int (val_field (bytes, id_length));
-			
-			if (_length > 0) {
-				
-				value b = val_field (bytes, id_b);
-				
-				if (val_is_string (b)) {
-					
-					_data = (unsigned char*)val_string (b);
-					
-				} else {
-					
-					_data = (unsigned char*)buffer_data (val_to_buffer (b));
-					
-				}
-				
-			} else {
-				
-				_data = 0;
-				
-			}
-			
-		}
+		Set (bytes);
 		
 	}
 	
@@ -101,20 +62,7 @@ namespace lime {
 	
 	Bytes::Bytes (const QuickVec<unsigned char> data) {
 		
-		_length = data.size ();
-		
-		if (_length > 0) {
-			
-			_data = (unsigned char*)malloc (_length);
-			memcpy (_data, &data[0], _length);
-			
-		} else {
-			
-			_data = 0;
-			
-		}
-		
-		_value = 0;
+		Set (data);
 		
 	}
 	
@@ -208,6 +156,84 @@ namespace lime {
 	}
 	
 	
+	void Bytes::Set (value bytes) {
+		
+		if (!init) {
+			
+			id_b = val_id ("b");
+			id_length = val_id ("length");
+			init = true;
+			
+		}
+		
+		if (!_value && _data) {
+			
+			free (_data);
+			
+		}
+		
+		if (val_is_null (bytes)) {
+			
+			_length = 0;
+			_data = 0;
+			_value = 0;
+			
+		} else {
+			
+			_value = bytes;
+			_length = val_int (val_field (bytes, id_length));
+			
+			if (_length > 0) {
+				
+				value b = val_field (bytes, id_b);
+				
+				if (val_is_string (b)) {
+					
+					_data = (unsigned char*)val_string (b);
+					
+				} else {
+					
+					_data = (unsigned char*)buffer_data (val_to_buffer (b));
+					
+				}
+				
+			} else {
+				
+				_data = 0;
+				
+			}
+			
+		}
+		
+	}
+	
+	
+	void Bytes::Set (const QuickVec<unsigned char> data) {
+		
+		if (!_value && _data) {
+			
+			free (_data);
+			
+		}
+		
+		_length = data.size ();
+		
+		if (_length > 0) {
+			
+			_data = (unsigned char*)malloc (_length);
+			memcpy (_data, &data[0], _length);
+			
+		} else {
+			
+			_data = 0;
+			
+		}
+		
+		_value = 0;
+		
+	}
+	
+	
 	value Bytes::Value () {
 		
 		if (_value) {
@@ -225,10 +251,21 @@ namespace lime {
 			}
 			
 			value object = alloc_empty_object ();
-			value newString = alloc_raw_string (_length);
-			memcpy ((char*)val_string (newString), _data, _length);
-			alloc_field (object, id_b, newString);
-			alloc_field (object, id_length, alloc_int (_length));
+			
+			if (_length > 0 && _data) {
+				
+				value newString = alloc_raw_string (_length);
+				memcpy ((char*)val_string (newString), _data, _length);
+				alloc_field (object, id_b, newString);
+				alloc_field (object, id_length, alloc_int (_length));
+				
+			} else {
+				
+				alloc_field (object, id_b, alloc_raw_string (0));
+				alloc_field (object, id_length, alloc_int (_length));
+				
+			}
+			
 			return object;
 			
 		}