dotnet drawing api: why .Net Matrix use float, but not double -- dotnet drawing api

Re: why .Net Matrix use float, but not double

Chris Taylor
4/25/2007 10:25:14 PM

I am no expert at this, but my guess would be to reduce the amount of data
that is shifted around in with in the system where the system includes the
across the system bus. Considering that the majority of the processing is
carried out on the video card the data needs to be moved from system memory
to video memory. Now I am sure you would argue that GDI+ does not currently
have any or much hardware acceleration, but I guess the structures are
optimized for that eventuality.

--
Chris Taylor
http://dotnetjunkies.com/weblog/chris.taylor

[quoted text, click to view]

Re: why .Net Matrix use float, but not double

Bob Powell [MVP]
4/29/2007 12:10:24 AM

I believe that at the time that the system was created floats were
considered as being enough and doubles had a performance hit for the
graphics cards that were _supposed_ to be accellerated for GDI+. At the end
of the day accelleration never materialised and GDI+ was never updated.

Even with floats however, the dimensions possible are impressive.

http://www.bobpowell.net/extents.htm

--
--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.

[quoted text, click to view]

Got something to say? Click here to post a reply to this thread.

Don't see what you're looking for? Try a search.

View other messages in the dotnet drawing api group.