[bug #26535] user created NSImage not displaying properly

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From	Yavor Doganov <INVALID.NOREPLY@gnu.org>
Newsgroups	gnu.gnustep.bug
Subject	[bug #26535] user created NSImage not displaying properly
Date	Fri, 9 Feb 2018 09:01:33 -0500 (EST)
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Follow-up Comment #3, bug #26535 (project gnustep):

I stumbled upon the second issue.  Lynkeos does all of its image processing in
worker threads so basically it doesn't work at all on GNUstep.  I was about to
write a similar test application but fortunately I found this bug.

With the attached *surprisingly* trivial patches drawing in secondary threads
works at least with the cairo backend.  Art and xlib display black rectangles
in Scott's test app but that's a general problem because the same happens with
the non-threaded variants (only file image is displayed).  I haven't tested
the opal backend as I can't build the opal library.

Lynkeos works only with cairo.  There is some flickering when the processed
image is being refreshed.  With art/xlib I get a weird glibc SIGABRT when it
is loading the main XIB file and instantiating objects.

I haven't done the equivalent for the woe32 server as I'm not familiar with
the code and can't test it anyway.

I am not sure at all if this is the right approach and what is the performance
penalty.  There should be some because XInitThreads enables the X locking
mechanism and it must be called unconditionally.

I hope this is one small step forward, though.

(file #43212, file #43213)
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File name: gui.patch                      Size:0 KB
File name: back.patch                     Size:0 KB


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[bug #26535] user created NSImage not displaying properly Yavor Doganov <INVALID.NOREPLY@gnu.org> - 2018-02-09 09:01 -0500

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