On 2010-10-03 15:46+0200 Arjen Markus wrote: > Hello Hazen, Alan, all, > > I have just built and tested PLplot in a very old environment (Windows XP > with MSVC 6.0 as the C compiler) and I had to correct the wingcc.c file for > lack of SetWindowLongPtr() and GetWindowLongPtr() in that set-up. > > While this worked, I did get some weird results with > pllegend(): > > - The background is not exactly the background of the plot > - The second page of example x26 is mangled.
Hi Arjen: Thanks for your tests. The first page of 26 is fine; the pllegend API allows you to apply a background to the legend which I have done in example 4 and example 26. The second page is "fine" as well in the sense it is consistent with the bad results for xwin here which is completely unaware of unicode. So count your test result in the "good" column for this release. I mentioned the example 26 issue (extra large legend background) you see with all device drivers in the recent pllegend discussion. The horizontal space for the annotated strings is calculated internally by plstrl, but that routine currently has no idea about utf-8 (what the Russian strings of page 2 are written in) and thus grossly overestimates the space involved because it assumes every utf-8 byte is a (Hershey) character. The solution is to convert utf8 to UCS4 (like all other string input routines do), and for unicode aware drivers (e.g, svg, qt, cairo, and wingcc) have a variation on the normal (unicode) text processing that allows the driver to calculate how much length that UCS4 string will require to be rendered without actually doing that rendering. That improvement should make the legend size exact for the unicode case, and more reasonable for the Hershey case. Another issue with your wingcc results is it uses the plfreetype method of rendering unicode that depends directly on the freetype library. That is available for Windows as part of the Windows GTK+ package, but it appears from the example 26 results that you have not downloaded that package so wingcc has fallen back to using Hershey fonts instead (which give a blank for all unicode characters just like you get for xwin). Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
