My apologies! I worte the email while doing 3 other things. I haven't really tried anything to access this struct other than trying to find different elements with ctypes.c_int.in_dll(dll, 'symbol') and access the elements in the same way I do in C. I didn't think either of these would work but hoped I would get some type of return that would give me a little more info.
I have been using a cli to access the library from python and would just send the image data via stdin and the parameters of the struct as command line args. From C the struct is easily accessible through the class instance (libraw::imgdata) and I tried similar variations with ctypes but just get 'function not found'. Makes sense though. this works: lr = ctypes.cdll.LoadLibrary(libraw) handle = lr.libraw_init(0) lr.libraw_open_buffer(handle, buf, len(buf)) # buf is an image read by python lr.libraw_unpack(handle, buf, len(buf)) # imgdata attampt. returns "function 'imgdata' not found" #lr.imgdata.params.bright(2) lr.libraw_dcraw_process(handle) lr.libraw_dcraw_ppm_tiff_writer(handle,'test.ppm') lr.libraw_close(handle) These are the 'exposed' functions, if that is the right term, and will produce an rgb image. There are a few other functions but they are not important atm. I know I don't know what I'm doing with this but it will be worth it if I can struggle through. Is there a way I can access this struct via python? Alternatively I could also write a new function in libraw that can access this struct and be exposed to ctypes. jt On Thu, Sep 23, 2010 at 12:28 AM, Simon Brunning <si...@brunningonline.net>wrote: > On 22 September 2010 21:13, jay thompson <jayryan.thomp...@gmail.com> > wrote: > > Hello, > > > > I posted in regard to this in the past but it didn't go very far, no ones > > fault, but I'm again atempting to make this work and could use some help. > > > > I would like to use libraw.dll (http://www.libraw.org/ version 0.10) > from > > python and can access all the functions fine and produce images but there > is > > a structure that holds all the process settings that I cannot access with > > ctypes. I'm sure it's because I'm going about it the wrong way. I was > > wondering if there was anyone in this list with experience with this sort > of > > thing that could point me in the right direction. > > A good start would be to tell us what you've tried, and what goes > wrong when you try it. > > -- > Cheers, > Simon B. > -- "It's quite difficult to remind people that all this stuff was here for a million years before people. So the idea that we are required to manage it is ridiculous. What we are having to manage is us." ...Bill Ballantine, marine biologist. -- "It's quite difficult to remind people that all this stuff was here for a million years before people. So the idea that we are required to manage it is ridiculous. What we are having to manage is us." ...Bill Ballantine, marine biologist.
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