Patent ID: 8643658
Filing Date: 2014-02-04
Classification: G09G

Abstract:
1. A computer-implemented method comprising: determining whether frames from a first source are timing aligned with frames from a second source, wherein frames from a first source are timing aligned with frames from a second source in response to an edge of a frame from the first source and a same type of edge of a frame from the second source are both within a window; writing frames from the second source into the first source; providing frames from the first source for display; determining whether a frame from the first source is similar to a frame from the second source; and selectively permitting display of frames from the second source instead of permitting display of frames from the first source in response to a determination that a frame from the first source is similar to a frame from the second source and alignment of frames from the first source with frames from the second source, wherein the determining whether a frame from the first source is similar to a frame from the second source comprises at least trapping selected active draw or rendering commands and indicating in a register that one or more of the selected commands were called and wherein when the register is empty, there is a determination that the frame from the first source is similar to the frame from the second source.