appcelerator/titanium_mobile — pull request #6183 by cheekiatng (2014-09-30 03:27:43+00:00)
Title: [TIMOB-17726] iOS: Support Ti.Platform.displayCaps.logicalDensityFactor

On iOS devices, this property returns 1, 2 and 3 for @1x, @2x and @3x respectively.
Note for iPhone 6+, this value is 3.