The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2016
Filed:
May. 19, 2011
Andreas Engh-halstvedt, Trondheim, NO;
Jorn Nystad, Trondheim, NO;
Edvard Sorgard, Hundhamaren, NO;
Frode Heggelund, Trondheim, NO;
Andreas Engh-Halstvedt, Trondheim, NO;
Jorn Nystad, Trondheim, NO;
Edvard Sorgard, Hundhamaren, NO;
Frode Heggelund, Trondheim, NO;
ARM LIMITED, Cambridge, GB;
Abstract
In a tile-based graphics processing system, when an overlay image is to be rendered onto an existing image, the existing tile data for the existing image from the frame buffer in the main memory is pre-loaded into the local color buffer of the graphics processor (step). The overlay content is then rendered and used to modify the tile data stored in the color buffer (step). When the data for a given sampling position stored in the tile buffer is modified as a result of the overlay image, a corresponding dirty bit for the tile region that the sampling position falls within is set (step). Then, when all the rendering for the tile has been completed, the dirty bits are examined to determine which regions of the tile have been modified (step). The modified tile regions are written back to the output image in the frame buffer in the main memory (step), but any regions whose dirty bits have not been set are not written back to the frame buffer in the main memory.