To Quartz: How do you prevent triggering of the GC?
On Mon, Mar 30, 2009 at 7:33 PM, Quartz <[email protected]> wrote: > > I did an android game using just the SurfaceView and it performs > fairly decent (it averages 50-to-60 fps). It was a simple game I put > together to benchmark the VM. It is certainly not the best rated game > out there--actually it is one of the worst come to think of it-- :), > but it does have smooth vertical scrolling. If I had done it in OpenGL > it would easily scroll vertical or horizontal. Either way the game is > called "Spout" and it is free if you want to check it. It has > particles, collisions and scrolling; and if you code wisely with the > GC in mind, you can even manage to keep the GC from triggering (that > took a bit of experimenting and profiling but I eventually calmed the > GC way down). > > There is a article somewhere in the newsgroup mentioning the hardware > specs on the graphics side. I think it mentioned that a low-end mobile > ATI GPU is embedded in the Qualcomm chipset. I ran several of the > OpenGL demos are they run very smooth indeed. > > On Mar 30, 3:45 pm, "[email protected]" > <[email protected]> wrote: > > Thanks Stoyan - I look forward to trying out your code. Very much > > appreciated. > > > > On Mar 30, 8:30 pm, Stoyan Damov <[email protected]> wrote: > > > > > I will try to code a demo which does side scrolling tonight, but I > > > don't know opengl, so I won't use it. > > > > > My phone is getting worse every day (I haven't used it as phone as a > > > matter of fact for a while) but in case it does manage to show smooth > > > scrolling, in the 5 seconds idle period, when it's not attempting to > > > send an MMS to the GOD DAMN myFaves service (and thus trigger GC), > > > I'll post the code. > > > > > Cheers > > > > > On Mon, Mar 30, 2009 at 11:36 AM, [email protected] > > > > > <[email protected]> wrote: > > > > > > Many of you will have read or contributed to the very long thread I > > > > started a week ago on '[android-developers] Re: Anything on Android > > > > that can do smooth scrolling?' > > > > > > That was a very useful discussion between devs and engineers on > > > > whether additional performance could be made available to fast-moving > > > > games by lowering priority or disabling other background threads. > > > > > > However, I wanted to create a separate thread to discuss what can be > > > > done TODAY in existing games to solve this problem. > > > > > > Why is it a problem? Because there is not a single game in Android > > > > Market that features smooth scrolling backgrounds. Games may not be > > > > the only app needed, but they certainly need to be visually > impressive > > > > for the platform to survive. > > > > > > Why do I think there is a solution today? Because all components > using > > > > GridView and ListView in most cases feature very smooth scrolling - > if > > > > you don't believe me, go to the thumbnail scrolling view in the > native > > > > picture viewer. > > > > > > So what I am saying is there is some magic in the GridView / ListView > > > > code which allows for smooth scrolling which games on Android > platform > > > > desperately need. Despite going through the source code extensively I > > > > cannot discover what is needed to apply this to a game engine. > > > > > > Please could someone with a good low-level knowledge of the GridView > > > > and ListView API's please please please provide a very simple demo of > > > > how this smooth scrolling could be applied to scrolling an oversized > > > > image either horizontally or vertically. > > > > > > Otherwise developers are all going to try and most likely fail to > > > > figure this out themselves. Believe me I have spent many hours on > this > > > > looking at Android source code, surfaceviews, onDraw, dispatchDraw, > > > > memory allocation, and nothing so far has given me anything close to > > > > smooth scrolling. > > > > > > And I also know game developers are competing with each other and > want > > > > to guard their tricks of the trade. But ultimately, we are ALL > > > > competing with rival mobile platforms and unless this issue can be > > > > resolved, all android game developers will lose out. > > > > > > And the whole platform loses because there will be no quality games. > > > > Why shouldn't our games look like this after all : > > > >http://www.youtube.com/watch?v=Y4795KVt_kw > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
