Mathias, Thanks for your reply. What does *smooth* panning mean? Could you explain it more?
Regards, Jill On May 22, 4:37 pm, pixelflinger <pixelflin...@google.com> wrote: > Hello, > > This has already been discussed a while back. > Neither API is "good", it really depends on the fb driver. From what I > can tell, the linux driver documentation is very vague about what > these functions actually do. > > On some drivers, FBIOPAN_DISPLAY does a *smooth* panning, which is > most definitely not what we want here. > > Conceptually, FBIOPUT_VSCREENINFO is what we want, but it is true that > on some drivers it is not as efficient. > > We're working on a small abstraction layer (HAL) that will allow ISV > to provide which ever code works best with their drivers. > > Mathias > > On May 21, 9:21 pm, Jill Zhou <ruohong.z...@gmail.com> wrote: > > > Hi, all > > > In /frameworks/base/libs/ui/EGLDisplaySurface.cpp > > function EGLDisplaySurface::swapBuffers will use FBIOPUT_VSCREENINFO > > to interact with FB driver to do page flip. Why not use > > FBIOPAN_DISPLAY? I think FBIOPAN_DISPLAY should be more efficient. FB > > driver only need to update base address, instead of check all > > parameter in VSCREENINFO. > > > Regards, > > Jill --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
