I don't think that is possible. The bitmap cache is associated with a single movieclip, and a movieclip cannot be the child of more than one parent movieclip.
It is possible, however to generate a bitmap and to copy it. We don't have any API for this in Laszlo, but the Flash 8 API does let you generate bitmaps from movieclips I believe. On Sun, Apr 27, 2008 at 11:40 AM, Gilad Parann-Nissany < [EMAIL PROTECTED]> wrote: > Hi > > We are on Flash 8 so that is OK. > > What if I want to create the bitmap cache once and then use it several > times? In detail the use case is as follows: > > - we have several views showing essentially the same resource > - we would like to create the bitmap cache the first time (the first > view) > - reuse that same bitmap cache in the 2nd and subsequent views > > Any chance? code samples? > > Thanks > Gilad > > Gilad Parann-Nissany > > ----- Original Message ----- > From: "Max Carlson" <[EMAIL PROTECTED]> > To: "Gilad Parann-Nissany" <[EMAIL PROTECTED]> > Cc: "P T Withington" <[EMAIL PROTECTED]>, "Max Carlson" < > [EMAIL PROTECTED]>, "laszlo-user" <[email protected]>, "Ammar > Tamazi" <[EMAIL PROTECTED]>, "Elias Khalil" < > [EMAIL PROTECTED]>, "Lou Iorio" <[EMAIL PROTECTED]> > Sent: Monday, April 21, 2008 9:13:55 PM (GMT+0200) Auto-Detected > Subject: Re: Understanding Flash memory usage when using Laszlo > > If you want to turn on bitmap caching via actionscript, you can see an > example in the drawview source: > > http://svn.openlaszlo.org/openlaszlo/trunk/lps/components/extensions/drawview.lzx > > e.g.: > var context = this.getMCRef(); > context.cacheAsBitmap = true/false > > This will work with any view, provided you're running flash 8 or greater. > > If you find yourself doing this a lot, please file a bug and we can add > a more formal API to view for you. Note that the more actionscript you > add using this technique, the less your app will work in other runtimes... > > All drawviews have cacheBitmap on by default. If you want to > experiment, you can try setting the drawview's cachebitmap attribute to > false. > > Gilad Parann-Nissany wrote: > > Thank you for the input. Could you give us concrete code examples of: > > > > 1. calling ActionScript directly in our OL code > > > > 2. using drawview (or any other technique) to create a bitmap cache of > > our SWFs. Note: we can limit ourselves to "simple views' (views that do > > not nest other views) as a first step if necessary. > > > > Gilad > > > > > > > > Gilad Parann-Nissany > > > > ----- Original Message ----- > > From: "Max Carlson" <[EMAIL PROTECTED]> > > To: "P T Withington" <[EMAIL PROTECTED]> > > Cc: "Gilad Parann-Nissany" <[EMAIL PROTECTED]>, "Max Carlson" > > > <[EMAIL PROTECTED]>, "laszlo-user" <[email protected]>, > > "Ammar Tamazi" <[EMAIL PROTECTED]>, "Elias Khalil" > > <[EMAIL PROTECTED]>, "Lou Iorio" <[EMAIL PROTECTED]> > > Sent: Thursday, April 17, 2008 7:18:24 PM (GMT+0200) Auto-Detected > > Subject: Re: Understanding Flash memory usage when using Laszlo > > > > > > > > P T Withington wrote: > > > On 2008-04-17, at 09:12 EDT, Gilad Parann-Nissany wrote: > > >> Hi > > >> > > >> With the help from this forum we have been making progress > > >> understanding our memory usage. See the separate thread: > [Laszlo-user] > > >> Understanding memory analysis when using _LzDebug.whyAlive() > > >> > > >> We're now at the point were we see that the "smoots" taken up by > > >> Laszlo objects are not all of our memory usage. It seems a large > part > > >> (large percentage of total RAM usage, maybe even more than 50%) may > be > > >> used elsewhere, perhaps in the Flash objects that are "underneath" > the > > >> Laszlo objects. > > >> > > >> Questions: > > >> > > >> 1. Is there any tool or technique that allows us to analyze > exactly > > >> how this memory is being used by Flash? ("underneath" the laszlo > > >> objects, I mean) > > > > > > I am not aware of such a tool. There may be a tool provided by > Adobe. > > > > Actually, this will be a nice benefit from the move to swf9. Flex > > builder (and presumably fdb) have profiling tools that can show this > > kind of memory usage. > > > > >> 2. Are there any guidelines to help us optimize this Flash part > of > > >> our memory usage? > > >> 3. More generally is there any way to use Flash-specific > > >> optimization techniques (going to the ActionScript where necessary). > > >> We know that in pure Flash there are several optimization > techniques; > > >> the following points are examples of things we wish to try > > >> 4. Can we in general call pieces of ActionScript from Laszlo > script? > > > > > > Yes. The OL compiler does not prevent you from doing that, but > neither > > > is it supported. > > > > > >> 5. Bitmap caching: > > >> > > >> > > >> • SWF resources can be translated once into bitmaps (on the > > >> client side) and cached > > >> • you probably know this is known as bitmap caching. > > >> • Then the bitmaps are used repeatedly instead of rendering > the > > >> SWF objects repeatedly. > > >> • Can we do Bitmap Caching for all those vector graphics > which > > >> do not change frequently (from Laszlo, but possibly with specific > > >> usage of Actionscript if necessary) > > > > > > I believe Max (cc-ed) has experimented with this. There may even be > > > support in LZX for it. > > > > We do have support for this in drawview. We can experiment with adding > > support for vector resources as well. There seemed to be side effects > > for things with nested views, for example. > > > > >> 6. > > >> Garbage collection: we would like to trigger the Flash garbage > > >> collection just to test what is going on (as a test not permanent > > >> change). Any way for us to do this? > > > > > > I am not aware of a programmatic way of doing that. In most > browsers, > > > if you minimize the window the app is running in the Flash GC will > run. > > > > > > Again, there are probably tools provided by Adobe for these purposes, > > > but I have not used them. There are probably more tools in the open > > > source Flex compiler, so the swf9 runtime should be easier to measure > > > and tune in this respect. > > > > -- > > Regards, > > Max Carlson > > OpenLaszlo.org > > > > -- > Regards, > Max Carlson > OpenLaszlo.org > -- Henry Minsky Software Architect [EMAIL PROTECTED]
