Qt Labs Forum » Qtopia Core DirectFB

1. 
   redyuan43
   Member

   I have successfully ran directfb for qt-embedded 4.4 in our board. But I found when I run directfb for qt-embedded 4.4 into our board , his performance is not good to qt4.4.0 bliting/drawing functions itself. so I want to know whether the directfb mechanism is impact the program or other reason.

   Posted: 3 months #

2. 
   ravenlord
   Member

   In theory the directfb driver should handle the acceleration if any acceleration is available and is integrated in your directfb drivers. Maybe the drivers aren't optimized for your board.

   Posted: 2 months #

3. 
   Håvard Wall
   hwall

   If you have an example/benchmark application that demonstrates the performance hit I could take a closer look and see if there's a performance bug somewhere.

   Also, as ravenlord says, the directfb driver might not be optimized or use any acceleration for you board and if this is the case, the qt/directfb driver is probably just overhead compared to the normal linuxfb driver. If you can share any information on the hardware and directfb driver you're using, that might be helpful.

   Posted: 1 month #

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