Image Drawing Speed -- dotnet compact framework

Alex Feinman [MVP]
9/14/2005 10:34:07 AM

It really depends on how you draw, but do not expect regular graphics
operation ever to approach the speed of GAPI. GAPI operates on a direct
memory buffer. DirectDraw, which replaces GAPI in the new devices does the
same thing. Regular graphics will never be as fast, but used judiciously it
offers a very reasonable speed. If there is one thing to avoid by all costs,
it is Set/GetPixel. Also the drawing speed is greatly enhanced by using an
off-screen buffer

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horseshoe7
9/14/2005 12:23:04 PM

So, you are saying DirectDraw API calls are now supported directly from the
CompactFramework API on PocketPC devices? How long has this capability been
available? Which specific versions of DirectDraw, CompactFramework, and/or
the PocketPC OS (or whatever MS is calling it now) and the Visual Studio/C#
development tools do I need to take advantage of this?

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Alex Feinman [MVP]
9/14/2005 4:46:34 PM

I did not say that.
DirectDraw interfaces are supported on Windows Mobile 5 devices. They are
not on the earlier devices. Compact Framework 2.0 wraps Direct3D mobile, but
not DirectDraw. Still you might find the DIrect3D sufficient for your needs

http://msdn.microsoft.com/mobility/windowsmobile/howto/windowsmobile5/api/default.aspx
http://www.mperfect.net/cfMDX

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horseshoe7
9/14/2005 10:11:02 PM

I've ordered the Windows Mobile 5 Developer Evaluation Kit DVD, and will give
it a whirl... For a number of years, I've been wanting to use C# and .NET if
possible for a cross-platform (PC and Mobile Device) application , but .NET
CF image-drawing applications have been far too slow in the past. I was able
to get reasonable drawing speed using C++ and GAPI, but I wasn't willing to
expend a lot of time completing the application in a non C#/.NET development
and target environment... I pop my head up every few months and check which
way the .NET winds are blowing, and I'm hoping that I can get there with
C#/.NET now.

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dotnet compact framework : Image Drawing Speed