how to draw a small image to filled a large container by canvas

i want to use a Image, size[100, 100] to filled Screen, 
it's my way:

```dart
canvas.save();
canvas.scale(screenWidth / image.width,  screenHeight / image.height);
canvas.drawImage(image, Offset(0, 0), new Paint());
canvas.restore();
```
are there  have better ways to do this?