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Having spent the last dev cycle looking at how we could specialize the
compositors for various backends, we once again look for the
commonalities in order to reduce the duplication. In part this is
motivated by the idea that spans is a good interface for both the
existent GL backend and pixman, and so they deserve a dedicated
compositor. xcb/xlib target an identical rendering system and so they
should be using the same compositor, and it should be possible to run
that same compositor locally against pixman to generate reference tests.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
P.S. This brings massive upheaval (read breakage) I've tried delaying in
order to fix as many things as possible but now this one patch does far,
far, far too much. Apologies in advance for breaking your favourite
backend, but trust me in that the end result will be much better. :)
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I updated the Free Software Foundation address using the following script.
for i in $(git grep Temple | cut -d: -f1 )
do
sed -e 's/59 Temple Place[, -]* Suite 330, Boston, MA *02111-1307[, ]* USA/51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA/' -i "$i"
done
Fixes http://bugs.freedesktop.org/show_bug.cgi?id=21356
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Move the definition to a separate header file and allow callers to inline
the simple function.
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We refactor the surface fallbacks to convert full strokes and fills to the
intermediate polygon representation (as opposed to before where we
returned the trapezoidal representation). This allow greater flexibility
to choose how then to rasterize the polygon. Where possible we use the
local spans rasteriser for its increased performance, but still have the
option to use the tessellator instead (for example, with the current
Render protocol which does not yet have a polygon image).
In order to accommodate this, the spans interface is tweaked to accept
whole polygons instead of a path and the tessellator is tweaked for speed.
Performance Impact
==================
...
Still measuring, expecting some severe regressions.
...
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Prefer to use the operations form cairo-wideint-private.h in order to
improve readability and reduce our assumptions on the availability of
64bit integers.
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Some tweaks to avoid stack copies and branches that save ~25% in
_cairo_traps_tessellate_convex_quad().
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These two functions were hiding away some important details
about strictness of inequalities. Also, the callers differ
on the strictness they need. Everything is cleaner and more
flexible by making the callers just call _cairo_slope_compare
directly.
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This was an initial attempt to fix the infinite loop bug
described here:
Infinite loop when scaling very small values using 24.8
http://bugs.freedesktop.org/show_bug.cgi?id=14280
This doesn't actually fix that bug, but having a more robust
comparison function can only be a good thing.
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This patch was produced by running git-stripspace on all *.[ch] files
within cairo. Note that this script would have also created all the changes
from the previous commits to remove trailing whitespace.
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This patch was produced with the following (GNU) sed script:
sed -i -r -e 's/[ \t]+$//'
run on all *.[ch] files within cairo.
Note that the above script would have also created all the changes
from the previous commits to remove trailing whitespace.
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address.
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Library Public License version 2 or 'any later version'
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functionality up into cairo_surface_t instead). Eliminated most of the remaining X datatypes (XFixed, XPointFixed, XLineFixed, XTrapezoid). Fixed some numerical problems relating to pen initialization and intersection calculation.
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