[cairo-bugs] [Bug 17693] Use libspectre when available for ps tests

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17693





--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk>  2008-09-21 06:21:21 PST ---
Along one branch I did use spectre for the test suite, but I found that the
output from the gs display device had more discrepancies wrt the reference
images than the pngAlpha device.

In order to use spectre/gs for the PS test suite target, you also need to
adjust the boilerplate code to call any2ppm. See the patch to
cairo-boilerplate-ps.c within
http://gitweb.freedesktop.org/?p=users/ickle/cairo;a=commitdiff;h=d45c8d348bb1f957f4f927abef24e114745722a2.

Once the test suite is using any2ppm to rasterise PS, I would like to start
using gs in a jobserver mode in order to avoid the initialisation overhead
(which is quite substantial) and to start using the cairo output device. (In
short running the full test-suite over 2/3 of the elapsed time is spent within
gs. Hacks like micro-GS show that is possible to substantially reduce that
time, but lack the independence and maturity required to provide conformance
testing.) Carlos, can you suggest the best way to tackle this using spectre?


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