Each file begins with a 32-bit synchronization word followed by zero or more pages. Organization of a CUPS Raster Fileįigure 1, "Raster Organization", shows the general organization of all CUPS Raster files. The registered MIME media type for CUPS Raster files is application/vnd.cups-raster. All three versions of CUPS Raster are streamable formats, and applications using the CUPS Imaging API (the cupsRaster* functions) can read all formats without code changes. CUPS 1.2 and later use version 2 (compressed) and version 3 (uncompressed) that are a superset of the version 1 raster format. These files are used to transfer raster data from the PostScript and image file RIPs to device-dependent filters that convert the raster data to a printable format.ĬUPS 1.0 and 1.1 used version 1 of the raster format. CUPS Raster files are device-dependent raster image files that contain a PostScript page device dictionary and device-dependent raster imagery for each page in the document.
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