> Well, I'm wondering just now how to grab an overall view of > my graphs, as I am a fltk/fluid beginner, until now I just > focused on getting the visualization done. > Now my thesis project is finishing and I realize I need an > overall visualization of my graphs... > My purpose is to save such a graph to a gif/png (I'm > realizing that fltk has tools just to read image files, but > not to write them, so I need to look for a third party free > library I guess)
Libpng is distributed with the fltk tarball, so I would suggest to use that. There are no fltk wrappers for *writing* PNG files but it is actually easy to use, and the docs in the PNG folder do a fair job of outlining what is required. Basically, if you can get a pointer to a byte array that is the pixel data for your scene, you are pretty much good to go. > so speed is not a big issue while resolution > could be: I'd like to preserve the details, therefore I think > I shouldn't zoom out. If my panel has size h by w, I think a > bitmap of the same h by w would be fine. PNG is lossless and does a passable job of compressing GUI type scenes (lots of blocks in the same colour compress fairly well) so it is preferred for screen grabs. I tend to shy away from jpeg as it is lossy, and tends to introduce artefacts into the grabbed image if there are large blocks of constant colour. It may do a better job of compressing the scene though. > Thanx, I will look into the fl_offscreen; are there any > examples/code snippets here on the site? There should be examples in the list archives - I'm fairly sure I posted some, and there were others. What search teram to use to find them though, I do not know! SELEX Sensors and Airborne Systems Limited Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** _______________________________________________ fltk mailing list fltk@easysw.com http://lists.easysw.com/mailman/listinfo/fltk
