Method and system for detecting a display mode suitable for a reduced refresh rate

摘要

A method and system for detecting a display mode suitable for a reduced display refresh rate are disclosed. Specifically, one embodiment of the present invention sets forth a computing device, which includes a memory and a processing unit. The memory stores multiple image surface data. The processing unit is configured to compose a first display frame from a first base surface and optionally a first overlay surface, calculate a first numerical code representative of a first frame content of the first display frame, compose a second display frame from a second base surface and optionally a second overlay surface, calculate a second numerical code representative of a second frame content of the second display frame, and track the results of comparing the first numerical code with the second numerical code to determine whether a change between the first frame content and the second frame content has occurred.

主权项

1. A computer-implemented method for determining a display mode for a display device based on a rate of change of content across display frames, the method comprising:
receiving a plurality of image surfaces from a frame buffer memory, wherein the plurality of image surfaces includes a base surface and an overlay surface; incrementing a first counter that resides within a frame compositor in response to receiving the plurality of image surfaces; composing, via a combine unit that resides within the frame compositor, a current display frame based on the base surface and the overlay surface; calculating, via a cyclic redundancy check (CRC) calculator that resides within the frame compositor, a first numerical code associated with content of the current display frame; comparing, via a comparator unit that resides within the frame compositor, a second numerical code associated with the content of a previous display frame to determine whether the current display frame is identical to the previous display frame; and if the current display is identical to the previous display, then incrementing a second counter that resides within the frame compositor; or if the current display is not identical to the previous display, then not incrementing the second counter, wherein a rate of change of display frame content is calculated by dividing the count of the second counter by the count of the first counter; wherein the plurality of image surfaces does not include a cursor surface, and the current display frame comprises an intermediate display frame.