The CUPS filter is responsible for controlling the multi-cut printing. When a multi-cut size
is selected, the filter should group the pages to fit the requested multi-cut layout. If there are
any pages or copies left, the best size to complete the printing should be selected. For
example, if (8x4) * 3 was selected and there are 2 copies left, they should be printed using
(8x4) * 2 paper size, if one copy is left, 8x4 paper size should be used.
The cups filter takes as an input a file (e.g. when used from command line or by a shell
script) or data stream. The data should be described by one of the following MIME types:
- application/vnd.apple-pdf
- application/octet-stream
The first type is used when printing from Mac OS application. The second - when printing
from Microsoft Windows client to Mac OS shared printer. If the data is passed by the
application in a different format, the CUPS automatically converts it to application/
vnd.apple-pdf. A wide variety of input data is supported, including PostScript, PDF, text
only, various image formats. All selected special features (scaling, layout options etc.) are
also applied by the CUPS system before the data is converted to application/vnd.apple-pdf.
The values for the custom printer controls (resolution, sharpness, gamma, contrast ,
brightness and saturation) are passed by the operating system to the CUPS filter as
arguments. If the default value is used the respective argument may be skipped.
For Mac OS 10.4 (Tiger) the CUPS filter is provided as a two-way Universal binary
supporting:
- PPC 32-bit processor architecture
- Intel 32-bit processor architecture (i386)
For Mac OS 10.5 (Leopard) and Mac OS 10.6 (Snow Leopard) the CUPS filter is provided
as a two-way Universal binary supporting:
- PPC 32-bit processor architecture
- Intel 32-bit processor architecture (i386)
- PPC 64-bit processor architecture
- Intel 64-bit processor architecture (x86_64)
Note that 64-bit versions are not used by 10.5 (Leopard) but are provided per Apple
recommendation.
Two versions of the CUPS filter are produced and installed as needed:
- for Mac OS 10.4 (Tiger)
- for Mac OS 10.5 (Leopard) and Mac OS 10.6 (Snow Leopard).
The validation is provided by debug builds, using available debug tools and log mechanisms
by the developers and by printing test prints by the QA. Since some of the user selection in
the UI is passed as arguments to the CUPS filter and the output is generated based on these
parameters, the following scenarios should be tested as a minimum:
- Printing one copy of a single page
- Printing multiple copies of a single page
- Printing multiple copies of 2 or more pages, collated
- Printing multiple copies of 2 or more pages, non-collated
Page 6 of 12
(24 pages)
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