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cairo-xcb kept a cache of free xid to avoid calling xcb_generate_id()
later. However, this is unsafe: When libxcb runs out of ids, it asks the
X11 server for an empty range of ids to use. The X11 server of course
does not know about cairo's cache and could hand out an id that cairo
will use again later. This would then result in BadIdChoice errors
later.
Fix this by simply removing the whole cache.
Fixes: https://gitlab.freedesktop.org/cairo/cairo/-/issues/434
Signed-off-by: Uli Schlachter <psychon@znc.in>
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All the *_reply() functions in XCB return a pointer to their result and as last
argument they get a xcb_generic_error_t** where pointers to errors are stored,
if any occurs.
However, a request can either fail or succeed. This means that if the returned
result is a NULL pointer, then an error occurred and the other way around: If
the error pointer is set to non-NULL, then the function must have returned NULL.
Thus, all the code, which just checks if an error occurred and which does not
care about the exact error code, does not need to get the error pointer at all.
In this case, xcb will free() the error internally.
While doing this, I noticed that _cairo_xcb_connection_get_image() always
succeeds and thus its return value can be replaced with the GetImage result.
Signed-off-by: Uli Schlachter <psychon@znc.in>
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This commit adds lots of asserts. These asserts verify for each extension
request that we send that the server really supports this.
Sadly, this causes 28 assertion failures in the test suite with xcb-render-0.0.
Signed-off-by: Uli Schlachter <psychon@znc.in>
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make on win32 complains that:
make[1]: Entering directory `/home/ranma42/Code/fdo/cairo/src'
../src/Makefile.sources:220: *** missing separator. Stop.
Makefile.sources should not contain if's, which are aoutomake-only
conditionals. The correct way to conditionally include files is to
enable/disable them using C preprocessor macros.
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Signed-off-by: Uli Schlachter <psychon@znc.in>
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This makes the xcb backend use the auto-generated xcb API instead of
hand-writing each request. This should also improve parallelism with non-cairo
threads that use the same xcb connection.
Big thanks to Andrea Canciani for taking a look at this and finding lots of good
improvements (especially finding xcb_send_request was great).
cairo-perf-trace and cairo-perf-diff-files between master
(6732dbf2992891be4b1f08b14a5c449fd08b637c) and this change:
$ ./cairo-perf-diff-files ../master_perf ../xcb_no_socket_perf
old: master_perf
new: xcb_no_socket_perf
Speedups
========
xcb-rgba evolution-0 23558.86 (23558.86 0.00%) -> 19338.78 (19338.78 0.00%): 1.22x speedup
▎
xcb-rgba poppler-bug-12266-0 98.43 (98.43 0.00%) -> 82.36 (82.36 0.00%): 1.20x speedup
▎
xcb-rgba gnome-terminal-vim-0 5518.08 (5518.08 0.00%) -> 4905.92 (4905.92 0.00%): 1.12x speedup
▏
xcb-rgba gnome-terminal-20090601-0 45648.46 (45648.46 0.00%) -> 41231.25 (41231.25 0.00%): 1.11x speedup
▏
xcb-rgba evolution-20090607-0 71643.69 (71643.69 0.00%) -> 66314.95 (66314.95 0.00%): 1.08x speedup
▏
xcb-rgba poppler-0 3501.69 (3501.69 0.00%) -> 3322.26 (3322.26 0.00%): 1.05x speedup
Slowdowns
=========
xcb-rgba gnome-system-monitor-0 7500.01 (7500.01 0.00%) -> 7923.70 (7923.70 0.00%): 1.06x slowdown
xcb-rgba swfdec-youtube-full-0 26409.89 (26409.89 0.00%) -> 28430.76 (28430.76 0.00%): 1.08x slowdown
▏
xcb-rgba gnome-system-monitor-20090821-0 34801.61 (34801.61 0.00%) -> 37891.14 (37891.14 0.00%): 1.09x slowdown
Signed-off-by: Uli Schlachter <psychon@znc.in>
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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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Still an experimental backend, it's now a little too late to stabilise
for 1.10, but this should represent a major step forward in its feature
set and an attempt to catch up with all the bug fixes that have been
performed on xlib. Notably not tested yet (and expected to be broken)
are mixed-endian connections and low bitdepth servers (the dithering
support has not been copied over for instance). However, it seems robust
enough for daily use...
Of particular note in this update is that the xcb surface is now capable
of subverting the xlib surface through the ./configure --enable-xlib-xcb
option. This replaces the xlib surface with a proxy that forwards all
operations to an equivalent xcb surface whilst preserving the cairo-xlib
API that is required for compatibility with the existing applications,
for instance GTK+ and Mozilla. Also you can experiment with enabling a
DRM bypass, though you need to be extremely foolhardy to do so.
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