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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>However, cupsInteger is a 32-bit unsigned integer and thus can only
represent sizes up to 2^32-1. It is very easy to go over 4GB with large format
printers, e.g., for a 44" wide Stylus Pro printer, 24-bit sRGB at
720dpi would hit the 4GB limit at 63 inches in length for uncompressed data,
maybe you'd get 100 inches with compression for a photographic print.<o:p></o:p></span></font></p>
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style='font-size:12.0pt;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>[gwp] I guess I was not considering LFP’s.
<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Now, we could use two cupsInteger slots for this (to provide a 64-bit
length), however based on your following comments it sounds like you expect
raster processing to happen with uncompressed data, for which you can calculate
the length from the page header anyways. Also, you can expect that most, if not
all implementations will *not* generate this information since the point of a
streamable raster format is to not need to buffer up a whole lot of data...<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>[gwp] The important case is the size of
the compressed raster data. The decompressed size is recorded only if the
raster is uncompressed. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>[gwp] I agree that some (a few or a lot)
of implementation may not provide the information but as I said, I am
requesting that the assignment be made and those who can (want to) may record
the size information. <o:p></o:p></span></font></p>
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<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face=Cambria><span style='font-size:12.0pt;
font-family:Cambria'>For most (all) processing, the raster data needs to be
decompressed. (For transport it should also be compressed.)
Therefore, it convenient to have the raster page data to be
uncompressed; versus decompressing and compressing between processes.
To denote this, a state flag is needed. This is also an
optional field and the value of zero (0) means the data is compressed.
I would not waste a whole integer on a flag, therefore, I would
propose that one of the cupsInteger be reserved for flags</span></font><o:p></o:p></p>
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12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I would actually prefer to flag the file as version 3 which is an
uncompressed CUPS Raster with the version 2 page header. And in the case of
local processing, you'll likely want to use native word order (another feature
of CUPS Raster that we are not bringing along for PWG Raster...)<o:p></o:p></span></font></p>
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style='font-size:12.0pt;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>[gwp] Do you mean big/little-endian? I
am nothing requesting the word ordering flag (value) be used. The current
specification is ok.<o:p></o:p></span></font></p>
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12.0pt;font-family:Cambria;color:blue'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>(In order words, we already have a way to specify an uncompressed
raster)<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Would it be sufficient to document an uncompressed version of PWG
Raster (with the "RAS3" file header) and then mark the native word
order support as out-of-scope for the spec but something that might be used
internally?<o:p></o:p></span></font></p>
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12.0pt;font-family:Cambria;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>[gwp] I believe the RAS3 is for the
entire PWG Raster file. I am requesting a flags (value) for individual
pages. <o:p></o:p></span></font></p>
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12.0pt;font-family:Cambria;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Cambria><span style='font-size:
12.0pt;font-family:Cambria;color:blue'>Glen<o:p></o:p></span></font></p>
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-webkit-text-decorations-in-effect: none;-webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px;word-spacing:0px'>________________________________________________________________________<br>
Michael Sweet, Senior Printing System Engineer, PWG Chair<o:p></o:p></span></font></p>
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