Legacy ImageMagick Discussions Archive

any ideas?

Stack:
(gdb) fr 1
#1 0x4827524f in SignatureImage () from /usr/local/lib/libMagickCore.so.5

whole stack
#0 0x482752ba in SignatureImage () from /usr/local/lib/libMagickCore.so.5
#1 0x4827524f in SignatureImage () from /usr/local/lib/libMagickCore.so.5
#2 0x4827524f in SignatureImage () from /usr ...

YOUR TEST

I run your thread unit tests from this my thread on the problem system (as I wrote above): http://www.imagemagick.org/discourse-server/viewtopic.php?f=23&t=20090

And result is:


> > ./imtest
Invalid null command.
Size: 500x332 / JPEG Blob-Length: 33087
Size: 170x134
Size: 188x138 ...

Seams that IM++ on my multithread application crash with Segmentation failt at this simple code:


Magick::Image::Image img;
img.read( picturepath );


IM:
> convert -version
Version: ImageMagick 6.7.5-10 2012-04-03 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick ...

Thanks for the answer.
Already do some steps, will continue tomorrow.
1) Seems that OpenMP disabled by default on FreeBSD config (i install IM from ports) and "make config" show that OpenMP is disables. Hmmm... seems that by default its compiled --without-threads - maybe its the reason?? is IM ...

ImageMagick 6.7.3-4 2011-11-29
FREEBSD 8.2-RELEASE
--------
Is IM really thread safe? On one thread that read and process picture is all going ok! but when its two or more threads, program crashed with SEGFAULT. Every thread read from disk NOT the same image as other thread, but (i think) at the ...

thanks for the answer. will try how works extent() (because still need to crop from the bottom with offset)

now, for center coping i wrote something like this and use value as crop offset:
ps. sorry for my english

Is there any way with magick++ to use gravity parameter ( Magick::CenterGravity ) when croping/resizing images? Need to crop from the center (or count pixels to crop from the right/bottom) i.e. something like this gravity parameter from command line

convert -thumbnail "120x90>" -gravity Center ...