[Gdal-dev] how to draw images on Windows

[Norman Vine]

Ben Discoe writes:
> 
> Just as a point of reference, the open-source application VTBuilder, in the
> free VTP software, uses exactly this approach to read GDAL files and render
> them as DIBSections on Windows, and has been available for years.
> 
> And yes, it is "fast as snot" on Win32  :)
> 
> The frustrating thing is on Linux, there are no DIBSections so it is
> painfully slow to scroll around large images...

FYI
I have always found using an in-memory tiling such as is done in TIFF overviews
and then using a tiled based drawing approach "fast as snot" on all the systems 
I have tried it on since the days when a '286' was king :-)

Cheers

Norman