On Tue, May 13, 2008 at 5:37 PM, Zhang Junbo <bearscafe2.0@xxxxxxxxx> wrote: > Hi, > > I'm just starting to write my code for gegl, I spent the whole day to > debug but failed. My code(svn 2287) can be found on > http://svn.gnome.org/viewvc/gegl/branches/branch_zhangjb/ . Here is > some messages from gdb. The reason the code segfaults is that you are passing buffer of 32bit floating point to a function in the underlying library that expects 64bit floating point. The attached patch creates the needed pixel formats to represent 64bit buffers since babl doesn't know this format yet. The format could have been created with: babl_format_new ( "name", "RGB double", babl_model("RGB"), babl_type ("double"), babl_component ("R"), babl_component ("G"), babl_component ("B"), NULL); and then referred to, I chose to just create it directly without giving it a name. If the fftw library has functions working on 32bit buffers it might be more suited for integration, if not I guess we just have to live with these larger buffers. I've attached a patch that makes the operation operate in 64bit like the function used. /Øyvind K. -- «The future is already here. It's just not very evenly distributed» -- William Gibson http://pippin.gimp.org/ http://ffii.org/
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