Hi Martin: On 2008-07-18 13:45+0200 Martin Sarajervi wrote:
> Hi, > > I can't get any labels on my plots when using plplot_canvas. I keep getting > warnings when I start the demo program (plplotcanvas_demo.c). > > I get the following errors: > > > (foo.x:23374): GnomePrint-CRITICAL **: file gnome-font-face.c: line 801 > (gnome_font_face_get_font_default): assertion `face != NULL' failed > > [...]For information, I have truetypesupport in my plplot compilation. Anyone > have any idea what could cause this problem? I am guessing a bit because you didn't specify your PLplot version or what platform you are running on, but I assume you are building and running our latest release, 5.9.0, or even the svn trunk version of PLplot and probably running on Linux or MacOS X rather than Windows. The gcw device driver uses our plfreetype interface to the freetype library. That interface needs further development to use fontconfig to greatly ease the pain of font selection. For now, plfreetype simply uses the crude method of specifying a directory for the TrueType fonts and the name of a font file in that directory in order to get access to a particular kind of font. So probably on your system, your fonts are installed in a directory or with file names which are not the defaults expected by our interface. There are a multitude of configuration options to choose your font files for drivers like gcw that use plfreetype. I was just going to refer you to http://plplot.sourceforge.net/docbook-manual/plplot-html-5.9.0/characters.html for documentation, but it needs updating. For example, I noticed it refers to ./configure --help which is a historical artifact that is no longer valid for our CMake-based build system. Instead, look at the results in CMakeCache.txt in your build tree for the relevant information. Here is just the start of those results on my system: [EMAIL PROTECTED]> grep PL_FREE CMakeCache.txt |head -10 PL_FREETYPE_FONT_PATH:PATH=/usr/share/fonts/truetype/freefont //Font file for PL_FREETYPE_MONO PL_FREETYPE_MONO:FILEPATH=FreeMono.ttf //Font file for PL_FREETYPE_MONO_BOLD PL_FREETYPE_MONO_BOLD:FILEPATH=FreeMonoBold.ttf //Font file for PL_FREETYPE_MONO_BOLD_ITALIC PL_FREETYPE_MONO_BOLD_ITALIC:FILEPATH=FreeMonoBoldOblique.ttf //Font file for PL_FREETYPE_MONO_BOLD_OBLIQUE PL_FREETYPE_MONO_BOLD_OBLIQUE:FILEPATH=FreeMonoBoldOblique.ttf //Font file for PL_FREETYPE_MONO_ITALIC Probably the most important of these variables is PL_FREETYPE_FONT_PATH. For example if you change that variable using the cmake option -DPL_FREETYPE_FONT_PATH:PATH=/YOUR/TrueType/font/location that may be all you need to get access to your Truetype fonts. To make sure you actually have TrueType fonts installed on your system, you could try our xcairo device where the font selection is handled automatically and smoothly by fontconfig. If that works, then you should be able to select the right mix of cmake -D options so that gcw works as well. There is also a method where you can change the font directory and font file names at run-time using environment variables, see the above URL. 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 __________________________ ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
