Yesterday Behdad Esfahbod wrote: > > > Tobias Oetiker wrote: > > Behdad, > > > >> Hi Tobias, > >> > >> The part creating the layout looks good. Any *interesting* thing will be > >> hidden in other parts of the code, namely the code calling this function. > >> In > >> general I'm quite surprised that you are hitting the load_fontset() path > >> all > >> the time as the fontsets should be cached and simply reused. One way to > >> debug > >> it is to run with FC_DEBUG=1 and look for all different Sort Patterns > >> passed > >> to fontconfig and see how they differ (I'm guessing minor difference in > >> the size). > > > > I just finished modifying the code, so that I am keeping multiple > > sets of PangoFontDescriptions for each combination of font and > > size. I then pass the FontDescription into the text function. This > > magically resolved the problem ... now the load_fontset gets only > > called 3 times or so ... > > > > Does this match expectations ? > > Not really. As I said, most probably you have been creating > slightly-different font descriptions. You can run the old code and print out > the font descriptions to see what has been causing it. In general you should > not need to cache much to make Pango behave. Just use the default font map > (which you are) and it should work reasonably.
Hmm, I am using the same font name across the board in 4 different sizes. DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier 7 DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier 8 DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier 9 DejaVu Sans Mono,Bitstream Vera Sans Mono,monospace,Courier 5.5 Is there a way to figure what font pango picked based on my description and then tell it to use this one again ? Could it be that when I ask for font "ABC,CCD 9" that pango finds "CCD 8.99999" and then when I ask again for "ABC,CCD 9" it goes looking again ? Could it be that I am doing something that makes pango forget about the fonts (flush its cache). How should I be structuring my program for optimal results. Have a separate layout for each font I am going to use and then switch layout according to the font ? As I said, I have shuffled my code around and suddenly the time for generating a second graph has gone down dramatically. I just don't know exactly why. old code: 0.221 0.158 0.152 0.157 shuffled code with separate PangoFontDescription structures for each font/size which I then apply to the layout as required: 0.194 0.024 0.023 0.023 rrd 1.2 code with libart/freetype: 0.031 0.024 0.023 0.024 cheers tobi > behdad > > > cheers > > tobi > > > > > > > > -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch [EMAIL PROTECTED] ++41 62 775 9902 / sb: -9900 _______________________________________________ rrd-developers mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers
