On Mon, Feb 2, 2009 at 8:06 PM, anand b <[email protected]> wrote: > > Hi Mathias, > We are using a ARM9 based board and the soft OpenGL implementation > available in Android. > > We are using a WVGA display. For display driver, we are synching with > display interrupt so that should not be a problem. We will again check > the fb contents when they are posted. > > We also see a similar problem with video. The video frame seems to be > made up of 2 triangles, but the diagonal line is visible for some > frames. This could be possible if the 2 triangles of the displayed > frame are from 2 different video frames. > > So we are suspecting that the screen is not composited completely by > SurfaceFlinger. Can you give some hints?
I don't know what's going on, but it surely looks like you're /dev/fb synchronization doesn't work. mathias > > Thanks, > Anand > > > On Tue, Feb 3, 2009 at 1:00 AM, Mathias Agopian <[email protected]> > wrote: >> >> Could give more details? Which hardware is this? >> Could be a bug in your display driver or GL driver. >> >> >> Mathias >> >> On Mon, Feb 2, 2009 at 6:27 AM, anand b <[email protected]> wrote: >>> >>> Hi, >>> >>> We are seeing some artefacts while running the OpenGL application >>> "Translucent GLSurfaceView" on our board. Could you please help us to >>> understand what could be going wrong? >>> >>> We see a flicker (where the background image is visible) for a short >>> time instead of 2 intersecting cubes. So, the final image is not >>> consistent. >>> >>> Due to double bufferring in SurfaceFlinger, we expected to always see >>> a consistent image on the framebuffer irrespective of the >>> rendering/cpu speed. >>> >>> Due to the flicker, it seems that the OpenGL composition in >>> SurfaceFlinger is somehow timed out and some triangles are not >>> processed. Is this the way SurfaceFlinger is implemented? >>> >>> How can we ensure that SurfaceFlinger completes composition before a >>> frame is displayed? >>> >>> We are using code from Android 1.0 release. Are there patches fixing >>> this issue and if so could you please point me to those? >>> >>> Thanks, >>> Anand >>> >>> > >>> >> >> > >> > > > > --~--~---------~--~----~------------~-------~--~----~ unsubscribe: [email protected] website: http://groups.google.com/group/android-porting -~----------~----~----~----~------~----~------~--~---
