I'm not an expert when it comes to system functions FBlit patches (or other for that matter
)but I guess that NewIcons use a special technique(when the rtg option is used) to process the gfx data outside of Chip ram and only use it when they appear on the screen. Something the pre 3.5 workbench icon.library doesn't offer. But it's just a speculation.
Here's a quote from FBlit's guide:
Quote:
Being able to use rastport/bitmaps outside Chip memory is not really of
any great benefit in itself, since usually a rastport's bitmap will
simply be the screen's bitmap on which the rastport appears, and
therefore must be in Chip memory. It became necessary as a result of the
next part of FBlit. When all bitmaps are allocated with planes in Fast
RAM, temporary bitmaps allocated for overlapped window regions will also
go in Fast RAM, so parts of rastports can end up outside Chip memory
under certain circumstances.
Having the OS able to use Fast RAM for non-displayable bitmaps is all
very nice, and maybe useful for programmers who know about it and want
to take advantage of it, but it makes no difference to existing
software.
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