On Mar 22, 2010, at 12:28 AM, Alan W. Irwin wrote: > On 2010-03-21 23:22-0700 David MacMahon wrote: > >> FWIW, I get a square bullet on the xcairo device for symbol 850 on >> Mac OS X. This is the same glyph that gucharmap shows for unicode >> symbol 0x2219 in the "symbol" font. Some other fonts have round >> bullets for this symbol. Can one specify a font for use with plsym? > > For our modern unicode font handling we only specify the most generic > information (sans font, serif font, etc.) and let other libraries > (e.g., > fontconfig) do their work which is to find the "best" font glyph that > represents that unicode symbol from the selection of system fonts in > the > generic class (sans or whatever) that we specify. > > So the proper thing to do here is to use gucharmap to find a glyph > that you > like. If you search for "bullet operator" there you will find > 0x2219. If > you then look at the generic sans font, fontconfig will pick > something that > has a high weight in the fontconfig configuration. In my case, that > is > DejaVu Sans (right click on the symbol to see the actual font being > selected > for the gucharmap display). That renders a square glyph here. > However, if > you choose generic serif instead, the font actually chosen (here) is > DejaVu > Serif, and that renders a circular glyph here. > > Were your above results for generic sans, generic serif, or > something more > specific? For best match with what our cairo and qt device drivers > do, > always use the generic gucharmap font choices. > > I suspect the simple answer to Jerry's original question is he was > using > sans when he should have being specifying serif. > > Another possibility is that "U+2219 BULLET OPERATOR" is not really > what he > wants. In that case he should try some of the other cross-references > given > by guchapmap in the character details for bullet operator e.g., > > • U+00B7 MIDDLE DOT > • U+2022 BULLET > • U+2024 ONE DOT LEADER > > Or he might just want to use the gucharmap search function for > bullet or dot > or circle. > > For example, if he just wanted a black circle, then the find > function in > gucharmap should quickly find U+25CF BLACK CIRCLE. Let's say, he > likes the > look of that with generic sans and/or serif. Then he could follow > example 23 > (or the documentation) about how to specify 0x25CF with a PLplot > escape > sequence. It could also cut and paste any glyph from gucharmap > directly > into his code (which actually copies the UTF-8 string for that glyph > into > his code). The PLplot library knows exactly what to do with UTF-8 > input > strings (examples 24 and 26 use this method), and the result should be > exactly the same as what can be seen with gucharmap. > > Bottom line here, I think the gucharmap application is a wonderful > application in general and also a wonderful adjunct to PLplot. It > makes > sense of what is going on with the system font choices for each > glyph and it > also makes it easy to choose PLplot symbols by using a PLplot escape > sequence (the example 23 method) or UTF-8 directly (by cutting and > pasting, > the method used in examples 24 and 26). > > I hope these remarks help Jerry and anyone else who is looking for > special > glyphs they want to put into their PLplot strings. > > 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 > __________________________ >
Thanks, Alan. Jerry ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
