Patent ID: 7912322
Filing Date: 2011-03-22
Classification: G06T

Abstract:
1. A screen magnifier for use with a computer system, comprising: a data collector to obtain a zoom parameter for screen magnification, the data collector to separate a draw text request, which is to draw a text element on a display device of the computer system, from draw non-text requests and store information about the draw text request in a storage area, wherein the draw non-text requests are to be rasterized into a shadow area; and a compositor to compose a zoom bit map containing (a) a portion of the shadow area that has the rasterized, draw non-text requests and that is magnified in accordance with the zoom parameter, and (b) a rendering, in accordance with the zoom parameter, of the text element using information about the draw text request in the storage area, into the magnified portion of the shadow area that is in the zoom bit map.