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Display screen capable of being subjected to a scroll procedure

  • US 7,796,142 B2
  • Filed: 10/13/2003
  • Issued: 09/14/2010
  • Est. Priority Date: 10/16/2002
  • Status: Expired due to Fees
First Claim
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1. A method of displaying a document on a display screen capable of being subjected to a scroll procedure, comprising:

  • allocating to the document a quantity of graphics memory to create a buffer memory for a visible part of the document and for an anticipation band of zones closest in physical proximity to the visible part of the document, wherein the anticipation band comprises content anticipated to be shown in the visible part of the document after the document is scrolled;

    calculating and chopping the buffer memory into pixmaps as a function of a size of the document, of the visible part, and of the anticipation band,relative positioning of the pixmaps with respect to the complete document and the visible part,filling the content of the pixmaps with a priority system dependent on the proximity of the pixmap with respect to a visible zone,when the document is subjected to a display procedure or to scrolling, copying the content in the pixmaps of the anticipation band into the visible window and redrawing the anticipation band, wherein when the content is not ready for display, forcing updating of the pixmaps to be displayed in the visible part prior to copying the content and,relatively positioning the pixmaps with respect to the document as a function of the new position of the visible part.

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