Abstract: An electronic device includes a processor configured to generate an oversized image by rendering an externally received input image, an image buffer configured to store the oversized image, a mask image buffer configured to store a mask image, which is smaller than the oversized image, a display device configured to apply, in real time, an XY offset to the oversized image based on orientation data to generate an offset image, and blend the offset image with the mask image to display an output image, which is smaller than the oversized image, and a motion tracking module configured to sense a movement of the display device and generate the orientation data.