[Gdal-dev] how to draw images on Windows

[Chapman, Martin]

Norman,

How do you do a tiled based drawing approach?  Is that better than what
I'm doing with the DIB Section?   

Martin


-----Original Message-----
From: Norman Vine [mailto:nhv at cape.com] 
Sent: Friday, March 05, 2004 3:45 PM
To: gdal-dev at remotesensing.org
Subject: RE: [Gdal-dev] how to draw images on Windows


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
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