for info here is teh different DPI reported by vcl for the same 13'' screen at different display setting
n_th@Norberts-MacBook-Pro /lo/core$ ./instdir/LibreOfficeDev.app/Contents/MacOS/soffice 2014-03-11 19:39:44.065 soffice[270:507] final mnRealDPIX = 91 mnRealDPIY = 91 n_th@Norberts-MacBook-Pro /lo/core$ ./instdir/LibreOfficeDev.app/Contents/MacOS/soffice 2014-03-11 19:34:11.715 soffice[267:507] final mnRealDPIX = 113 mnRealDPIY = 113 n_th@Norberts-MacBook-Pro /lo/core$ ./instdir/LibreOfficeDev.app/Contents/MacOS/soffice 2014-03-11 19:32:59.299 soffice[251:507] final mnRealDPIX = 128 mnRealDPIY = 128 n_th@Norberts-MacBook-Pro /lo/core$ ./instdir/LibreOfficeDev.app/Contents/MacOS/soffice 2014-03-11 19:33:31.395 soffice[264:507] final mnRealDPIX = 149 mnRealDPIY = 149 That is why the so called 'ScaleFactor' which was calculated with f = E((dpi + 48) / 96) gave different behavior at different level of display resolutions.. none of them having anything to do with the retina 'doubling' thing. The one at 113 is the one said to be best for retina... but in all case 1 point = 4 pixel.. the later two case are 'scaled down to fit the screen' by the system itself. none of these value are the actual device ppi.
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