UPDATING IMAGE REGIONS DURING COMPOSITION

摘要

Techniques are described for determining a region to be updated in a frame based on positional changes of one layer from frame-to-frame. The positional changes may be displacement of a layer or removal of a layer from one frame to the next. In addition to the information of the positional changes, the techniques also utilize all areas for which the image content changed, but the position did not, for determining the region to be updated.

主权项

1. A method of displaying images, the method comprising:
determining one or more layers having a position that did not change from a first image frame to a second, subsequent image frame and having image content that changed from the first image frame to the second image frame; determining a region that needs to be updated in the second image frame based on a construct encompassing one or more layers having a position that changed from the first image frame to the second image frame and one or more constructs encompassing respective layers of the determined one or more layers; causing the determined region to be composed in the second image frame without updating any region other than the determined region in the second image frame; and displaying the composed second image frame on a display device.