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directdraw

Started by Sinan Aug 24, 2005 at 7:54 AM 2 replies 650+ views

Original Post

Aug 24, 2005 at 7:54 AM

I am trying to write a program (using VC++) about displaying image. I take them from camera and its driver card. I obtain image buffer (YUY2 format) and I want to display image by directdraw. But I couldn't. It gives error when 'Lock'function execute. Error message is "DDERR_INVALIDPARAMS". I looked msdn and I find that : If you attempt to create a wide surface in video memory when the DDCAPS2_WIDESURFACES flag isn't present, the attempt will fail and return DDERR_INVALIDPARAMS. Note that attempting to create extremely large surfaces might still fail, even if the driver exposes the DDCAPS2_WIDESURFACES flag. { m_OffScreen->Lock(rect, &ddsd,DDLOCK_EVENT|DDLOCK_SURFACEMEMORYPTR|DDLOCK_WAIT, 0); } Could you help me ?

khognar

Aug 24, 2005 at 8:19 AM

DDSURFACEDESC2 ddsdSrc;
ZeroMemory( &ddsdSrc,sizeof(ddsdSrc) );
ddsdSrc.dwSize = sizeof(ddsdSrc);

//if Mm_OffScreen is CDsiplay object use this
if(FAILED(Mm_OffScreen->m_pddsBackBuffer->Lock(NULL, &ddsdSrc, DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR, NULL)))
{
//Errorhandling!
}

// if Mm_OffScreen is a CSurface object use this
if(FAILED(Mm_OffScreen->m_pdds->Lock(NULL, &ddsdSrc, DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR, NULL)))
{
//Errorhandling!
}

i hope this will help!

p.m. : eğer başka bişey kullanıyosan.yada kafana takılan bişi varsa bunla ilgili msn'den konusalım.

Zedix

Aug 24, 2005 at 8:23 AM

Hi,
If you look at the SDK, you'll notice that the DDLOCK_EVENT parameter is not currently implemented. Try to remove that flag and try again.

Just a suggestion :)

Sinan

Author

Sinan

Aug 24, 2005 at 10:19 AM

I have already take the image :)(it is not clear but can be recognized the motion.
thanks,
sinan

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