Okay, I just tried the method outlined here: http://www.codeproject.com/KB/GDI-plus/pointerlessimageproc.aspx
On my Windows XP box it runs on both Microsoft's runtime as well as Mono 2.2. Performance seems good. I have to fiddle a bit more and see how setting the DoubleBuffered() property affects things, but generally this is very encouraging. -L Stifu wrote: > > I haven't yet, but I plan to. I want to replace my unsafe FastBitmap class > with it, so my app can be fully managed and get a little speed boost. > However, the good thing about the FastBitmap class implementation was that > it was handled pretty much exactly like the Bitmap one... Not sure if it > can be done with the pointerless method, at least not as is, apparently, > because I had a quick look at the class, and it had no SetPixel or > GetPixel methods. > > > LKeene wrote: >> >> Stifu, >> have you actually tried the "Fast Pointerless Image Pocessing" method on >> CodeProject? I'm implementing it right now and praying there are no >> issues. If I can't do fast pixel drawing it's a showstopper for sure. I >> want this to work so badly... >> >> -L >> >> >> >> Stifu wrote: >>> >>> Mono being faster than .NET with SetPixel must have been on a particular >>> case... I have found a huge performance issue with Mono and >>> Get/SetPixel() in a particular situation, making Mono crawl... Something >>> instantaneous with .NET can easily take 10 seconds with Mono (the perf >>> hit is exponential, too). >>> I couldn't make a reduced test case for that one either yet... >>> >>> But hey, that aside, I've been happy with Mono too. :p >>> >>> >>> Dan Shryock wrote: >>>> >>>> On Fri, Mar 20, 2009 at 8:40 AM, LKeene <[email protected]> wrote: >>>>> >>>>> I actually intend to use it to draw to a memory bitmap pixel-by-pixel, >>>>> rather >>>>> than calling SetPixel() each time. Apparently that would be extremely >>>>> slow >>>>> form what I've read online. The only alternative to Set/GetPixel() >>>>> seems to >>>>> be declaring an unsafe block and using LockBits(). I'll try to test >>>>> the mono >>>>> LockBits() implementation today, but assuming that there is indeed a >>>>> bug, >>>>> does anyone have any other ideas of how to accomplish drawing to a >>>>> memory >>>>> Bitmap other than SetPixel()? I have a precomputed "Color[,]" that >>>>> specifies >>>>> the pixels colors. >>>> >>>> In a recent project, I had no troubles working with lockbits on Mono >>>> 1.9 on linux. >>>> In the past, using some older version of Mono (probably 1.1.x or 1.2.x) >>>> I had >>>> encountered few troubles working with lockbits but they have been >>>> resolved in >>>> newer Mono releases. >>>> >>>> Another thing that I noticed is that calling SetPixel repeatedly on >>>> Microsoft's >>>> .NET is much slower than calling SetPixel repeatedly on Mono (though >>>> lockbits >>>> was still faster on both). >>>> >>>> HTH >>>> >>>> Dan >>>> _______________________________________________ >>>> Mono-list maillist - [email protected] >>>> http://lists.ximian.com/mailman/listinfo/mono-list >>>> >>>> >>> >>> >> >> > > -- View this message in context: http://www.nabble.com/LockBits%28%29-on-Mono-2.2--tp22611389p22626570.html Sent from the Mono - General mailing list archive at Nabble.com. _______________________________________________ Mono-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-list
