Pre-scale the background image to match the device resolution. Split the background image in texture tiles like 256x256, 128x128, .... Blitt the tiles separately.
2010/4/8 lixin China <smallli...@gmail.com> > Hi Schneider: > As you said avoid scale the texture. Could you tell me the solution > how to render background texture(480x320 to full screen) without > scale. > > On Apr 7, 5:28 am, Ralf Schneider <li...@gestaltgeber.com> wrote: > > If your performance problem is only related to putting sprites on the > > screen, don't expect an improvement by witching to the NDK. > > > > I don't know how you are currently doint it, but these are some general > > remarks: > > > > Use OpenGL ES to draw the sprites. > > Limit your textures to 256x256. 512x512 seems to be slower on some > devices. > > Use texture atlases for smaller sprites -> To avoid state changes in > OpenGL > > Use VBOs > > Avoid textures with alpha channels on slower devices. > > Don't scale or rotate your sprites on slower devices. Slower devices > often > > have a fast path for simple blitt operations. => Check if "point sprites" > > are available on the device. If yes, use them. > > Use 16 Bit (565) textures. > > Watch the video I have posted in the previous post. The speaker has some > > valuable tips for performance improvements. > > > > Anyway, 100 Sprites is not very much if you are already using OpenGL... > > So may be you are right and the only solution is to target high end > devices > > for your next project. > > > > 2010/4/6 MrChaz <mrchazmob...@googlemail.com> > > > > > > > > > I was hoping that someone had tried a little test app with a simple > > > scene. I think I've pretty much reached the limits in terms of get > > > sprites on the screen at an acceptable frame rate (at least on G1 type > > > hardware). > > > It seems, at least for what I'm doing, the limit is about 100 sprites > > > but for my next project I'd like a bit more. > > > Maybe I'll just stop making games for 'old' hardware and concentrate > > > on the Droid and N1. I can't say I like the idea of ignoring half the > > > market :( > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > > To unsubscribe, reply using "remove me" as the subject. > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
