| 摘要 |
A system for converting a page description file to a composite representation thereof for fast web viewing, said system including a conversion engine configured to convert a page of said graphics based page description file into an aggregate file having all display metrics of said page and to convert said page into an image-only file having metrics that represent the background image object files of said page, a rendering utility for rendering said aggregate file to an aggregate bitmap and for rendering said image-only file into an image-only bitmap, a comparison engine for comparing the image-only bitmap and the aggregate bitmap to create a foreground bitmap file which can be displayed on a Web browser, said comparison engine further including a conversion sub routine for converting said image-only bitmap file to a background raster file, and a delivery engine for delivering said foreground bitmap file and said background raster file, or said foreground bitmap file and said background image object files, to a Web browser by creating HTML code which superimposes said foreground bitmap file and said background raster file or said foreground bitmap file and said background image object files on a Web browser, thereby providing a small sized, high quality image and text composite representation of said page of said page description file.
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