I sent a bad URL for the "IPP: Color and Imaging Attributes" Working Draft,
dated December 5, 2002. I left out the host address. Also there wasn't a
.pdf so I down loaded a version with no revision marks. The corrected URLs
are:
ftp://ftp.pwg.org/pub/pwg/ipp/new_COLOR/pwg-ipp-color-and-imaging-v02-021205
-rev.doc
ftp://ftp.pwg.org/pub/pwg/ipp/new_COLOR/pwg-ipp-color-and-imaging-v02-021205
.pdf
Tom
-----Original Message-----
From: Hastings, Tom N [mailto:hastings@cp10.es.xerox.com]
Sent: Monday, June 23, 2003 17:30
To: Hall, Dave (HP); TAYLOR,BOB (HP-Vancouver,ex1)
Cc: ipp@pwg.org
Subject: IPP> [jobx] - The "color-effects-type" Job Template attributes
for con trolling black and white printing of color documents
Dave and Bob,
I understand from Pete Zehler, that you have an action item for proposing a
Job Template attribute to be added to the Job Extensions spec [jobx] for use
by PSI. I call you attention to a similar Job Template attribute that is in
the "IPP: Color and Imaging Attributes" Working Draft, dated December 12,
2002. It is called "color-effects-type".
Please consider it as input for the Job Template attribute for [jobx]. When
we get an agreed version for [jobx], that version can replace the one in the
Color and Imaging Attributes proposals.
As I understand the requirements, the client needs to be able to tell the
print provider (PSI Service, IPP Printer) whether to print a color document
in one of three ways:
color - the colors that are in the document
bi-level black and white - two levels only
gray scale - implementation dependent number of gray scale levels
The "IPP: Color and Imaging Attributes" Working Draft is available at:
ftp://pub/pwg/ipp/new_COLOR/pwg-ipp-color-and-imaging-v02-021205-rev.doc
ftp://pub/pwg/ipp/new_COLOR/pwg-ipp-color-and-imaging-v02-021205-rev.pdf
Here is the extracted version (but it only has two values, so we can add the
third strict 'bi-level-black-and-white'):
3.7 color-effects-type (type2 keyword)
This "color-effects-type" Job Template Job attribute indicates whether a
color document should be rendered in full color or should be rendered using
an algorithm that maps the full range of colors to alternate values, such as
gray scale or monochrome. This capability allows a full color printer to
print a color document in monochrome or grayscale or black and white as a
way to save time, toner, or cost when proofing a document. See section
3.1.3.1 for an Overview of Color Effects in the context of other Output
Color Rendering characteristics.
Standard keyword values are:
'color' - all color content of the document MUST be preserved and
rendered in color
'monochrome-grayscale' - the color content of the Input-Document
should be identified and an implementation-dependent algorithm MUST be
applied to map the document colors to various intensities of black and
white.
If the Printer supports this attribute, it MUST support the 'color' and
'monochrome-grayscale' values. If a color Printer does not support this
attribute, the Printer MUST provide the 'color' behavior.
3.7.1 color-effects-type-default (type2 keyword)
See [RFC2911] section 4.2 for the behavior of "xxx-default" Job Template
Printer attributes.
3.7.2 color-effects-type-supported (1setOf type2 keyword)
See [RFC2911] section 4.2 for the behavior of "xxx-supported" Job Template
Printer attributes.
Tom
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