Hi, Ajay But how to set position of overlay with current overlay interface.
Regards Jill On Mar 24, 12:33 pm, AJAY <ajay...@gmail.com> wrote: > You are correct. The current android_surface_output.cpp doesnt have > any Overlay implementation . However you can check the TI > implementation at omap-zoom site > > Here is the link > :http://git.omapzoom.org/?p=platform/hardware/ti/omap3.git;a=tree;f=li... > > -Ajay > > On Mar 19, 10:52 am, waterblood <guoyin.c...@gmail.com> wrote: > > > > > Hi All, > > > Below is my understanding about how to enable theOverlayin a new > > hardware platform. Correct me if I am wrong. > > > 1. Implement the stub funtions in hardware\libhardware\modules\overlay > > \overlay.cpp, this will generate a share library liboverlay.trout.so. > > > 2. In SurfaceFlinger, it will create a DisplayHardware instance, and > > call DisplayHardware::init() which will create anoverlayengine from > > liboverlay.trout.so. > > > 3. When we want a OverlayRef from ISurface, we call > > ISurface::createOverlay() which will take use of theoverlayengine > > creat in step 2. > > > 4. Create aOverlayfrom OverlayRef as it in frameworks\base\libs > > \surfaceflinger\tests\overlays\overlays.cpp. > > > sp<OverlayRef> ref = isurface->createOverlay(320, 240, > > PIXEL_FORMAT_RGB_565); > > sp<Overlay>overlay= newOverlay(ref); > > > /* > > * here we can use theoverlayAPI > > */ > > > overlay_buffer_t buffer; > > overlay->dequeueBuffer(&buffer); > > printf("buffer = %p\n", buffer); > > > void* address =overlay->getBufferAddress(buffer); > > printf("address = %p\n", address); > > > overlay->queueBuffer(buffer); > > > My questions are: > > a. In step 4, as we want paint something in theoverlay, should we > > just put the image data to the buffer return by overlay->dequeueBuffer > > (), and call queueBuffer() to show the buffer? > > > b. I dont see any update in android_surface_output to take use > > ofoverlayinterface, will it be updated to useoverlayinterface ifoverlayis > > exit in the hardware? I suggest the surface output may try > > to create OverlayRef from surface interface, if it fail, surface > > output take the display mechanism as before(post buffer), otherwise it > > use thisoverlayto display video frame. > > > Thanks > > Guoyin Chen- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "android-framework" group. To post to this group, send email to android-framework@googlegroups.com To unsubscribe from this group, send email to android-framework+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-framework?hl=en -~----------~----~----~----~------~----~------~--~---
