HARDWARE OVERLAY ASSIGNMENT

摘要

An aspect of the present invention proposes a novel approach that can reduce the total number of the overlays to be composited during the display of graphical output in a mobile computing device. As a result, the total number of memory bandwidth and the usage of a graphics processing unit by a pre-compositor can be decreased significantly. According to one embodiment, this new approach is implemented with a display panel with embedded memory which supports a partial update, or refresh feature. Which such a feature, the layer compositor (typically either the display controller or GPU) is able to keep track of actively updating regions of a display panel by checking if each layer has new content to be displayed.

主权项

1. A method for generating a plurality of graphical overlays for a display frame, the method comprising:
receiving input data corresponding to a plurality of graphical layers; generating a composition list comprising the plurality of graphical layers; determining a plurality of active layers and a plurality of static layers from the plurality of graphical layers; calculating a union area comprising the plurality of active layers; determining a set of static layers, the set of static layers comprising static layers from the plurality of static layers without an intersection with the union area; filtering the set of static layers from the composition list; and storing data corresponding to the plurality of active layers comprised in the composition list in a plurality of graphical overlays, the plurality of graphical overlays being comprised in a display controller of a computing device.