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References: https://bugs.freedesktop.org/show_bug.cgi?id=48577
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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If we have a curvy polygon, we can expect to generate lots of short
trapezoids. However, we may be able to reduce the transport size by
converting them into a set of boxes instead.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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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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Step 1, fix the failings sighted recently by tracking clip-boxes as an
explicit property of the clipping and of composition.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Lots upon lots of tiny fixes mixed in with experimental code. :(
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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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Clang static analyzer signals "Dereference of null pointer" in case
the malloc returns NULL, as the code is checking the wrong pointer.
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Currently we use cairo_traps_t to also pass around arrays of boxes. This
is woefully inefficient in terms of storage, but also means that we
repeatedly have to verify that the traps are a set of boxes. By
explicitly passing around a cairo_boxes_t we avoid the semantic loss.
This will be heavily used in pending commits.
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