BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  read and parse a WMF ( windows metafile ) file          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message enzo Guest Posted: Mon Mar 12, 2007 3:16 pm    Post subject: read and parse a WMF ( windows metafile ) file Hi I need to read and parse a WMF ( windows metafile ) file, in order to get the GDI commands stored inside the wmf and rerun it , mybe after some change. I look on the web for some info, but I only find how to build a wmf using GDI, non the opposite, how to scan and parse a GDI to extract the original gdi commands. I suppose it should be possible, bu I didn't know how. Do you knoen if there some documentation which explain me how to do that job ? I would also appreciate info about already existing libraries which do this. Kindly regards, Enzo Back to top Michel Leunen Guest Posted: Mon Mar 12, 2007 10:01 pm    Post subject: Re: read and parse a WMF ( windows metafile ) file enzo wrote: Quote: I need to read and parse a WMF ( windows metafile ) file, in order to get the GDI commands stored inside the wmf and rerun it , mybe after some change. I look on the web for some info, but I only find how to build a wmf using GDI, non the opposite, how to scan and parse a GDI to extract the original gdi commands. I suppose it should be possible, bu I didn't know how. Do you knoen if there some documentation which explain me how to do that job ? A Windows metafile is just a record of all the functions that were needed to create the image. The way how all these functions are recorded in the metafile is documented. See http://www.wotsit.org/ Michel -- ---------------------------------------- Michel Leunen mailto: see my homepage. C++Builder, BCC5.5.1 Web site: http://www.leunen.com/ ---------------------------------------- Back to top Joe C. Hecht Guest Posted: Tue Mar 13, 2007 10:54 pm    Post subject: Re: read and parse a WMF ( windows metafile ) file Quote: I need to read and parse a WMF ( windows metafile ) file, in order to get the GDI commands stored inside the wmf and rerun it , mybe after Having done this, a bit of advice, Using the EnumMetafile functions will leak resources. Depending on the metafile, it may leak enough resources to bring down a Windows 9.x machine. The resource leaks are somewhat documented by Microsoft. Your best bet is to open the metafile using a file or stream, and work with it directly. There are three types of metafiles you must deal with (wmf, placeable (if it is a .wmf and is stored on the disk, this is most likly the format), and the emf format. Another bit of advice. The documentation on the metafile format is often inaccurate, meaning you are going to have to create a metafile contiaing most all of the commands (some are only available by stealing the ouput from an EMF print spooler), and looking at the parameters for each call, and deciding if the docs are correct, or if they are not, then you must patch up the record types for each that is wrong. It can get rather complex. I have a wmf reader unit that is largely complete for wmf and placeable wmf, and somewhat complete for emf. It is also able to render the metafile without resource leaks or font scaling problems. FWIW, it is complete enough to be used in a few commercial projects that use wmf's. I would be interested in selling thesource code to the unit. If you are interested, place email. Joe -- Delphi, graphics, and printing specialist available - $35/hr http://www.code4sale.com/codeit/index.htm Joe Hecht Associates 121 Louise Drive Crestview, FL 32536 Back to top Bruce Larrabee Guest Posted: Thu Mar 15, 2007 2:13 am    Post subject: Re: read and parse a WMF ( windows metafile ) file Hi Enzo, Take a look at, 'Programming Windows - Fifth Edition', by Charles Petzold. Chapter 18 - Metafiles, it's covers .wmf and .emf. It might be of use... 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