Hello list, I wrote a sw in .NET for windows (a sort of graphical editor) and now I need to port it to OSX. Being Cairo so slow i decided to write an alternative libgdiplus.dylib dedicated to OSX using only Core Graphics Calls. It won't be complete, I will only implement those methods I used in the original .NET sw. I am at a good point and it works like a charm. I will surely release it under the GPL license (because I took some code from the original libgdiplus). Using Cocoa i could also implement some feature that was missing in libgdiplus ( mostly GraphicsPath.AddString() thanks to NSBezierPath ).
I am not saying that Cairo should not be used, I only had to avoid it because I needed performances and my software must be released soon. If you are interested I can share the code. Ciao, Daivde. > -----Messaggio originale----- > Da: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Per > conto di Peter De Jager > Inviato: mercoledì 27 luglio 2005 11.34 > A: [email protected] > Oggetto: [Mono-winforms-list] MWF painting VERY slow compared to .NET > > When painting a bitmap to a Form and measuring the frame > rate, I get vastly different figures on .NET vs. Mono. E.g. > on .NET I get 114 fps while under mono it's only 4.5 fps (on > the same hardware). What's even stranger is that I get the > same (4.5 fps) figure on a PowerPC Mac mini (1.42 GHz G4, 167MHz > bus) and an Intel box (dual 3GHz Xeon, 533MHz bus). Both > systems are running Fedora Core 4. I thought that perhaps it > relates to video drivers but I installed the latest ATI > driver on my Xeon box (Radeon 9800 Pro) and there is still no > difference. > > Something else is that on WMF, the background is always > painted even though I override OnPaintBackground of my Form > with an empty implementation, e.g.: > > protected override void OnPaintBackground(PaintEventArgs e) { } > > On Windows, this prevents the Form from repainting the > background, thus speeding up painting and reducing flicker, > while MWF always appears to repaint the background. > > I've done (very limited) testing on Gtk (Glade), and it > appears to be fast on Linux (comparable to > System.Windows.Forms on .NET), but while being fast on Linux, > Glade is MUCH slower on Windows (I don't have exact figures > but it's very noticable). > > Is the MWF implementation likely to increase in speed (by 20 > times!) as it matures, or should I use Gtk for Linux / OS X > and System.Windows.Forms for Windows? I was hoping that I > could use a single code base for all platforms (which has > been the case so far). > > Don't take this the wrong way, I don't mean to be critical. I > think it's great that there is a managed implementation of > Windows Forms, but at 20 times slower it renders my Windows > applications unusable under Mono. > > Thanks > Pete. > > _______________________________________________ > Mono-winforms-list maillist - [email protected] > http://lists.ximian.com/mailman/listinfo/mono-winforms-list > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.338 / Virus Database: 267.9.4/57 - Release Date: > 22/07/2005 > _______________________________________________ Mono-winforms-list maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-winforms-list
