Bug 6558 - add flate compression to PDF generation
Summary: add flate compression to PDF generation
Status: RESOLVED FIXED
Alias: None
Product: cairo
Classification: Unclassified
Component: pdf backend (show other bugs)
Version: 1.1.1
Hardware: x86 (IA32) All
: highest enhancement
Assignee: Kristian Høgsberg
QA Contact: cairo-bugs mailing list
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Reported: 2006-04-11 19:15 UTC by Pablo Rodríguez
Modified: 2007-03-28 01:23 UTC (History)
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Description Pablo Rodríguez 2006-04-11 19:15:29 UTC 
I have downloaded two cairo generated PDF documents
(http://cworth.org/~cworth/papers/cairo_ddc2005/cairo_ddc2005.pdf and
http://cworth.org/~cworth/papers/cairo_lca2005/cairo_lca2005.pdf).

Their original filesizes are 5.18MB and 3.08MB. Compressing them with the Flate
algorithm (patent-free and with a higher compression rate for vectors than LZW),
the resulting filesizes are 1.08MB and 678KB.

I think the Flate compression should be enabled for all PDF generation with cairo.

(I used http://multivalent.sf.net for the Flate compression, but remember that
Multivalent tools are not released under the GNU GPL, unlike the tool itself.
Comment 1 Adrian Johnson 2007-03-28 01:23:05 UTC 
Cairo 1.4.0 and later supports Flate compression in the generated PDF.

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