}
context.fillStyle = 'white';
- context.fillRect(0, 0, 1200, 800);
+ context.fillRect(0, 0, this.thumbEl.getWidth() / this.getScaleLevel(), this.thumbEl.getHeight() / this.getScaleLevel());
+
context.drawImage(imageCanvas, sx, sy, width, height, x, y, width, height);