RASTER IMAGE EXAMPLE CODE
RASTER IMAGE EXAMPLE SERIES

The version 2 raster data is compressed using a PackBits-like algorithm. Table 2: CUPS Version 2 Raster Page Device Dictionary Bytesįour floating point numbers giving the left, bottom, right, and top positions of the page bounding box in points Each page starts with a version 2 page device dictionary header and is followed immediately by the compressed raster data for that page.

RASTER IMAGE EXAMPLE SERIES

The CUPS Imaging API raster functions perform this function automatically.įollowing the synchronization word are a series of raster pages. The writer of the raster file will use the native word order, and the reader is responsible for detecting a reversed word order file and swapping bytes as needed. KKK.)ġ8 = sGray (gray using sRGB gamma/white point)ģ2 = ICC1 (CIE Lab with hint for 1 color)ģ3 = ICC2 (CIE Lab with hint for 2 colors)ģ4 = ICC3 (CIE Lab with hint for 3 colors)ģ5 = ICC4 (CIE Lab with hint for 4 colors)ģ6 = ICC5 (CIE Lab with hint for 5 colors)ģ7 = ICC6 (CIE Lab with hint for 6 colors)ģ8 = ICC7 (CIE Lab with hint for 7 colors)ģ9 = ICC8 (CIE Lab with hint for 8 colors)Ĥ0 = ICC9 (CIE Lab with hint for 9 colors)Ĥ1 = ICCA (CIE Lab with hint for 10 colors)Ĥ2 = ICCB (CIE Lab with hint for 11 colors)Ĥ3 = ICCC (CIE Lab with hint for 12 colors)Ĥ4 = ICCD (CIE Lab with hint for 13 colors)Ĥ5 = ICCE (CIE Lab with hint for 14 colors)Ĥ6 = ICCF (CIE Lab with hint for 15 colors)Ī version 2 raster file begins with a 32-bit synchronization word: 0x52615332 ('RaS2') for big-endian architectures or 0x32536152 ('2SaR') for little-endian architectures. Media weight in grams per meter squared, 0 = printer defaultĠ = Do not change trays if selected tray is emptyġ = Change trays if selected tray is emptyĠ = Do not rotate even pages when duplexingġ, 2, 4, 8 bits for version 1 raster filesġ, 2, 4, 8, and 16 bits for version 2/3 raster filesġ to 240 bits for version 2/3 raster filesĢ = planar pixels (CCC. Left and bottom origin of image in points Horizontal and vertical resolution in dots-per-inch.įour integers giving the left, bottom, right, and top positions Table 1: CUPS Version 1 Raster Page Device Dictionary Bytes Each page consists of a header (the PostScript page device dictionary and raster-specific values) followed by the bitmap image for the page. 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.

RASTER IMAGE EXAMPLE CODE

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.

Raster image example