Bug 6558

Summary:	add flate compression to PDF generation
Product:	cairo	Reporter:	Pablo Rodríguez <freedesktop>
Component:	pdf backend	Assignee:	Kristian Høgsberg <krh>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	enhancement
Priority:	highest
Version:	1.1.1
Hardware:	x86 (IA32)
OS:	All
Whiteboard:
i915 platform:		i915 features:

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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