Deng XueFeng wrote:
> hi,
>      how to change the pixel format of tmp surface got by GetSubSurface?

You don't get a sub surface of a tmp surface. I thought about this (example 
with two threads):

- Create Main Surface (&pMain)
  - GetSubSurface (pMain, NULL, &pSub1)
  - GetSubSurface (pMain, NULL, &pSub2)
- Create Temp Surface (&pTmp1)
- Create Temp Surface (&pTmp2)

Thread1
- pSub1->Blit( pSub1, pTmp1 )

Thread2
- pSub2->Blit( pSub2, pTmp2 )

-- 
Best regards,
  Denis Oliver Kropp

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| DirectFB - Hardware accelerated graphics |
| http://www.directfb.org/                 |
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