Hi Hezekiah: I'm not sure what 'truecolor' is, but the 'mem' and 'memcairo' drivers (which I'm fiddling with right now) are designed to allow one to make a plot on an image background.
You pass in an RGB array as the background, and make normal PLplot function calls. The lines, points, labels, etc generated by PLplot overlay the image, which is passed back to the user as an RGB array. Then you need to write the RGB array to some image format using external software. Currently the decorations are opaque, but I'm looking into allowing semi-transparent overlays on the input image (using the cairo alpha channel support in memcairo) right now. Regards, Doug [EMAIL PROTECTED] Software Engineer III UCAR - COSMIC, Tel. (303) 497-2611 On Wed, 12 Mar 2008, Hezekiah M. Carty wrote: > Are there currently plans to add either of truecolor image support > (photo as a plot background for example) or 3D oriented plimagefr > support? If not, and there is an interest in including such functions > in plplot, I would like to tackle those after getting the plimagefr > coordinate transformation support finalized. > > For the truecolor image support, my thought is to have a function > along the lines of: > void plimagergba( > PLFLT** r, PLFLT** g, PLFLT** b, PLFLT** a, > PLINT xdim, PLINT ydim, > PLFLT xmin, PLFLT xmax, PLFLT ymin, PLFLT ymax, > void (*pltr) (PLFLT, PLFLT, PLFLT *, PLFLT *, PLPointer), PLPointer > pltr_data) > with function arguments being used similarly to how plimage works. > With the r,g,b,a values separate, any image loading routines could be > handles on the user's end or at least abstracted on top of this. > > Is there a function like plfill (and/or plfill3) which can take a RGBA > color to plot? The plimage* functions use plfill internally. Or is > there a better, more plplot-like way to go about this? > > Thanks, > Hez > > -- > Hezekiah M. Carty > Graduate Research Assistant > University of Maryland > Department of Atmospheric and Oceanic Science > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Plplot-devel mailing list > Plplot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/plplot-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
