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April 2004
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2004.04.26 11:06 "Re: Large TIFF files", by Rob Tillaart
Joris wrote: > [some discussion deleted] > > It is not possible to select allways in advance the right mode, as a > > user can > > decide to enlarge a bitmap to > 4GB. When 32 bit mode was chosen and > > there is > > a sudden runtime switch to 64bit mode I can imagine quite some > > difficulties. > > => So the library must work internally in 64 bit mode. > > The premis, I agree with, but my conclusion is > => so the library user must specify if it wants to write a 32bit or 64bit file > in advance, using a flag in the primary TIFFOpen call. Your earlier question is also valid for the library user (programmer): It does not always know in advance if it needs 32/64 bit. Or you get the scenario in which the programmer selects 32 bit and at some time an Exception/error will occur as data doesn't fit in 4GB. This could imply that all work on the bitmap(s) has to be redone, now in 64bit mode, which takes a lot of time. (Worst case you lose customers). I expect that after such experience most programmers will select 64 bit, or there must be a hard requirement for 32 bit only. regards, rob tillaart