printing transparent objects

[Th...@blum.com]

Hi,

I've written a small program where I can load an svg-file into the 
background and then paint on it (make anotations and markups...). When I 
try to print (using the PrintTranscoder class) it works fine as long as I 
have drawn no transparent object. If there are objects with opacity on the 
svg  the print job size gets huge (almost 4 GBs by a paper-size of A0). I 
guess this is because of the fact that postscript doesn't support 
transparency(?). Now my question is: Is a possibility to reduce the print 
job size, for example by reducing the quality of the transcoding or 
something similar, or does anyone have any other idea for a workaround.

thanks in advance
Thomas

PS: I've tried to generate a PDF-file with the PDF-transcoder and then 
print the generated PDF-file. This worked great, but it is not a very 
convenient solution, because the user then would have to open another 
program (like Adobe Reader) to print out the generated file.

Re: printing transparent objects

[th...@kodak.com]

Hi Thomas,

Thomas.Hagen@blum.com wrote on 01/24/2006 02:32:08 AM:

> I've written a small program where I can load an svg-file into the 
background 
> and then paint on it (make anotations and markups...). When I try to 
print 
> (using the PrintTranscoder class) it works fine as long as I have drawn 
no 
> transparent object. If there are objects with opacity on the svg  the 
print 
> job size gets huge (almost 4 GBs by a paper-size of A0). I guess this is 

> because of the fact that postscript doesn't support transparency(?).

   Correct.

> Now my question is: Is a possibility to reduce the print job size, for 
example 
> by reducing the quality of the transcoding or something similar, or does 
anyone 
> have any other idea for a workaround.

   So I have a few ideas but I don't know for certain on any of this, also
you will need to do this yourself our simple PrintTranscoder won't do it
for you (although you can just copy our code an work from that, if you get
something that might be commonly useful it would be nice to report back!).

   Under JDK 1.4 and higher there is a very rich set of printer 
'attributes'.
Among these are 'PrintQuality', and 'PrinterResolution'.  So you could
try setting this on the PrintJob (PrinterResolution might be tricky as
the printer must 'support' the specified resolution - so you can't
arbitrarily lower this).

> PS: I've tried to generate a PDF-file with the PDF-transcoder and then 
print 
> the generated PDF-file. This worked great, but it is not a very 
convenient 
> solution, because the user then would have to open another program (like 
Adobe
> Reader) to print out the generated file.

   Odd, I wonder what it does differently...


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