Hi Valentijn, re: > What file in the McIDAS distro should we look for that takes > care of the ADDE serving of regular AREA files, what code is > handeling the reading of the AREA formatted files? For MSG this > is msgtaget2.for The toplevel ADDE server for images is agetserv.fp (Fortran). This routine will examine the user request and startup the appropriate server if necessary. For AREA files, it does not start another server; rather, it calls the internal subroutine AGET where all the work is done. re: updated msgtaget2.for > OK, once it is finished I'll send you the code. The modified MSG > server code i'll send you tomorrow... Sounds good, thanks. > You mentioned earlier you figured out how to skip the header, and > jump to the compressed part in the AREA file for the PNG code to do > its work. Can you share with us your insights? The code is contained in the pnga2area.c file which is in the ldm-mcidas source distribution. It will be easier for you to read the code than for me to describe what it does (it is very straightforward). That being said, I can tell you that 'pnga2area' understands the contents of a McIDAS AREA header. It reads appropriate words to find out where the image portion of the file starts, and then reads all header portions up to the beginning of the PNG-compressed portion of the image. The PNG header is then read to find out how many lines are represented, and then a decompression loop is executed to uncompress the compressed part of the image. Please remember that the routine was written to be able to decode data from a disk file or from a stream. The reading of all of the header up to the beginning of the PNG compressed section is done instead of jumping to the appropriate location mainly to handle streams. Cheers, Tom **************************************************************************** Unidata User Support UCAR Unidata Program (303) 497-8642 P.O. Box 3000 address@hidden Boulder, CO 80307 ---------------------------------------------------------------------------- Unidata HomePage http://www.unidata.ucar.edu **************************************************************************** Ticket Details =================== Ticket ID: FQZ-585386 Department: Support ldm-mcidas Priority: Normal Status: Closed
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