Obtains the vertical DPI of the image stored in Rosetta's memory buffer
Usage:
imgYDPI (object me)
Parameters:
None
Returns:
(integer) - the image vertical DPI
Example:
xtRose = xtra("Rosetta").new( )
xtRose.imgOpen( "C:\windows\test.jpg" )
nxDPI = xtRose.imgYDPI( )
Notes:
DPI information is only applicable to TIFF, JPEG, PNG and BMP formats.