Thanks Alex, Are you suggesting I choose a point in time, for instance, when 500 vectors are drawn, then convert them, encode as png file, overlay as another child image, clear the graphics object and let user continue scribbling on newly cleared graphics object?.
I was planning on doing something similar, based on user control, such that they could "record" layers of annotations but it would work as a background automation too, although then I have to worry about combining the automatically generated images (not suggested by user) to create the annotation layer that they have requested..... --- In [email protected], "Alex Harui" <[EMAIL PROTECTED]> wrote: > > Flash/AIR are vector display list renderers. If you give it tons of > vectors to display, it will take a while to render them. This is quite > different from bitmap renderers like Windows. There are advantages and > disadvantages to each. > > > > If I were writing such an app, I would probably take a snapshot every > once in a while and draw on top of the recent snapshot. > > > > ________________________________ > > From: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of dannyvenier > Sent: Thursday, March 27, 2008 7:19 PM > To: [email protected] > Subject: [flexcoders] graphics object seems to degrade performance > > > > Hi, > I'm writing an AIR app that uses a scribble type component. In a > nutshell, just uses the graphics lineTo() method to draw a line from > the current location to the new position of the mouse on a mouse move > event. > > I have noticed that after scribbling for a bit (maybe 30 seconds), > the mouse movement tracking is impaired and my scribbling which once > resembled smooth circles, starts to look like octagons, hexagons, > pentagons...eventually triangles....you get the picture. The > frequency which the application picks up the move events is reduced > so the smooth tracking turns to noticable lines. The graphics object > appears to be bogging down the application and mouse event frequency > as the number of lines in the graphics object increases. It doesn't > take long to degrade. > > I tried out the flex profiler and didn't show any significant growth > in memory over this scribble period. I tried a scrible application > from Andy Rayne's scribble board > http://weblogs.macromedia.com/arayne/ > <http://weblogs.macromedia.com/arayne/> and it behaves exactly the same > > way. There is no scaling, zooming or manipulation of the graphics > lines at all. I'm assuming they're just pushing points onto an array > but haven't looked into the source to confirm how this type of class > behaves. > > Has anyone experienced this kind of degradation with a graphics > object and if so, have you figured out what's going on? >
