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-none-

2007-10-06       - By Leech, Jonathan

 Back
First, here's the context behind what I'm trying to do: I am integrating
Flying Saucer, iText, JFreeCharts, and Batik to produce PDF reports,
similar to (actually replacing) big.faceless.org Report Generator.

I am mostly done, but my biggest outstanding problem has to do with the
iText / Batik integration. I have followed the SVG example from the
iText in Action book. My issue is that <pattern> elements within the SVG
are rasterized when output. When my PdfTemplate and Graphics2D size is a
few hundred by a few hundred, the output quality is poor. When I
increased the size to a few thousand by a few thousand, the CPU spun for
15 minutes, and the resulting PDF locked up my Firefox browser.

It appears Apache FOP handles SVG in a similar manner, but perhaps more
emphasis has been applied to its SVG capabilities. See
http://xmlgraphics.apache.org/fop/dev/svg.html. In particular it handles
svg <pattern> as a vector, not a raster.

As I see my options, I can do one of the following:
1) Update com.lowagie.text.pdf.PdfGraphics2D to behave like FOP's
version.
2) Use FOP or Batik to render the SVGs into standalone PDFs (or PDF
commands), and include them in my iText-produced PDF.

I am leaning towards option #2, because doing so gets me from point A to
point B without making modifications to any of the projects (currently I
have modified the iText Image and PdfContentByte classes to directly
support SVG content). The downside is nobody else will benefit. However,
Option 1 could be tricky as well - you probably don't want iText to have
a dependency on FOP, there could be licensing issues if you copy /
include the code etc.

Thoughts?

Sincerely,
Jonathan Leech
Virtela Communications

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.5730.11" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>First, here's the
context behind what I'm trying to do:&nbsp;</SPAN></FONT><FONT face=Arial
size=2><SPAN class=517573221-05102007>I am integrating Flying Saucer, iText,
JFreeCharts, and Batik to produce PDF reports, similar to (actually replacing)
big.faceless.org Report Generator.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>I am mostly done,
but my biggest outstanding problem has to do with the iText / Batik integration
.
I have followed the SVG example from the iText in Action book. My issue is that
&lt;pattern&gt; elements within the SVG are rasterized when output. When my
PdfTemplate and Graphics2D size is a few hundred by a few hundred, the output
quality is poor. When I increased the size&nbsp;to a few thousand by a few
thousand, the CPU spun for 15 minutes, and the resulting PDF locked up my
Firefox browser.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>It appears Apache
FOP handles SVG in a similar manner, but perhaps more emphasis has been applied
to its SVG capabilities. See <A
href="http://xmlgraphics.apache.org/fop/dev/svg.html">http://xmlgraphics.apache
.org/fop/dev/svg.html</A>.
In particular it handles&nbsp;svg &lt;pattern&gt; as a vector, not a
raster.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>As I see my options
,
I can do one of the following:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>1) Update
com.lowagie.text.pdf.PdfGraphics2D to behave like FOP's
version.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>2) Use FOP or Batik
to&nbsp;render the SVGs into standalone&nbsp;PDFs (or PDF commands), and
include
them in my&nbsp;iText-produced PDF.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>I am leaning
towards
option #2, because doing so gets me from point A to point B without making
modifications to any of the projects (currently I have modified the iText Image
and PdfContentByte classes to directly support SVG content). The downside is
nobody else will benefit. However, Option 1 could be tricky as well - you
probably don't want iText to have a dependency on FOP, there could be licensing
issues if you copy / include the code etc.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007>Thoughts?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2><SPAN
class=517573221-05102007>Sincerely,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>Jonathan
Leech</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=517573221-05102007>Virtela
Communications</SPAN></FONT></DIV></BODY></HTML>

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