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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - pdftops sometimes creates huge PS 3 files out of small PDFs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81760#c16">Comment # 16</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - pdftops sometimes creates huge PS 3 files out of small PDFs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81760">bug 81760</a>
from <span class="vcard"><a class="email" href="mailto:ajohnson@redneon.com" title="Adrian Johnson <ajohnson@redneon.com>"> <span class="fn">Adrian Johnson</span></a>
</span></b>
<pre>(In reply to William Bader from <a href="show_bug.cgi?id=81760#c14">comment #14</a>)
<span class="quote">> Thanks for the deflate patch. I was following the example in
> <a href="http://www.zlib.net/zlib_how.html">http://www.zlib.net/zlib_how.html</a> but I wasn't sure if the stream needed any
> header or wrapper to be usable in a postscript filter.</span >
It needs to be wrapped in an ASCIIHex or ASCII85 stream. You can look at the
pdftocairo -ps output to see how cairo does it.
<span class="quote">> I noticed that the patch creates new DeflateStream files. I currently added
> my new code to the end of FlateStream, but I was considering that also
> because it allows poppler to use its own internal flate decoder and to use
> zlib only for encoding. I want to get it working first, then I'll clean it
> up.</span >
I think it is better to keep code that depends on external libraries in a
separate file.
The deflate stream in my patch is well tested and based on similar code in
cairo that has been in use for 10 years.
<span class="quote">> I could make a new configure flag to enable flate encoding, and then the
> encoding and decoding could be configured independently.</span >
That capability is already in my patch.</pre>
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