Layout engine for creating a visual layout tree for a document
US10387547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2015 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Nov 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A layout engine generates a visual layout tree for a visual description tree of a document whose content is to be rendered in one or more display areas. A visual description tree describes the content of a document along with formatting and logical arrangement the content. Visual description nodes of a visual description tree represent the organization of the constituent elements a document hierarchically. A visual layout tree defines the layout of a document within one or more display areas. Visual layout nodes of a visual layout tree represent the layout of the content of a document hierarchically. The layout engine receives as input a visual description tree and generates the corresponding visual layout tree. A rendering engine then inputs the visual layout tree and generates a graphics buffer containing the pixels representing the layout of the document as defined by the visual layout tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.