Hazen Babcock wrote: > Alan W. Irwin wrote: >> On 2009-03-26 14:06-0400 Hazen Babcock wrote: >> >>> Alan W. Irwin wrote: >>>> Hi Hazen: >>>> >>>> I have been testing the efficiency of text clipping for the cairo devices >>>> for a reasonably modern libcairo (version 1.6.4) and relatively modest >>>> 2.4GHz PC, and unlike older libcairo versions it is looking good. >>>> >>>> Here is one example: >>>> >>>> softw...@raven> time c/x09c -dev pngcairo -drvopt text_clipping=0 -fam >>>> -fflen 2 -o cairotest%n.png >>>> >>>> real 0m0.391s >>>> user 0m0.360s >>>> sys 0m0.008s >>>> softw...@raven> time c/x09c -dev pngcairo -drvopt text_clipping=1 -fam >>>> -fflen 2 -o cairotest%n.png >>>> >>>> real 0m0.485s >>>> user 0m0.468s >>>> sys 0m0.012s >>>> >>>> There is a relatively large amount of text in that example (the contour >>>> labels), and also quite a bit of graphics. In fact it is that example that >>>> shows (on the first page) what happens if you don't have text clipped >>>> properly. But the total difference in elapsed time is trivial, just 0.094 >>>> seconds. >>> Sounds okay to me. I'm a little worried that many people will have older >>> versions of the library, but perhaps we can have, or at least recommend a >>> minimum libcairo version during the build process? >> Done. See the updated (revision 9775) README.release. > > I was thinking about putting the warning into the cairo.cmake. Is that > possible? Any pointers on where to look for an example of how to do this?
Thank you Alan for your help with this. I've added a version check in cairo.cmake. You'll get a warning if your version is less than 1.20.5. To do this I added a version argument to the pkg_check_pkgconfig macro and propagated this change to the other driver cmake files. I don't think I broke anything... I have a slightly more recent version of pangocairo (1.22.2) and I also get pretty much identical rendering speeds with text_clipping on or off. best, -Hazen ------------------------------------------------------------------------------ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
