We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

CreateSuface failing

guzza
guzza asked
on
Medium Priority
331 Views
Last Modified: 2013-12-03
Will somebody please tell me what's wrong with this. CreateSurface is
returning DDERR_INVALIDPARAMS. I'm trying to create a single surface to
display a picture. I'm using the Cygnus GNU-Win32 compiler (beta 18) and
need the code to be in C. I've looked at all the sample code I can find
and can't figure out what's wrong.

LPDIRECTDRAWSURFACE lpDDSPrimary;  
LPDIRECTDRAW lpDD;
HRESULT ddrval;
DDSURFACEDESC ddsd;
DDSCAPS ddscaps;
.
.
ddrval = DirectDrawCreate(NULL,&lpDD,NULL);
ddrval = lpDD->lpVtbl->SetCooperativeLevel(lpDD,hWnd,DDSCL_EXCLUSIVE |
DDSCL_FULLSCREEN);
ddrval = lpDD->lpVtbl->SetDisplayMode(lpDD,640,480,8);

memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS;
ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
ddrval = lpDD->lpVtbl->CreateSurface(lpDD,&ddsd,&lpDDSPrimary,NULL);
if (ddrval != DD_OK)
 {
 lpDD->lpVtbl->Release(lpDD);
 return FALSE;
 }

Thanks in advance...

Nick Gallimore
Comment
Watch Question

Commented:
Your code is too minimalistic. You also need to specify DDSD_HEIGHT|DDSD_WIDTH for dwFlags, and set dwWidth and dwHeight:

ddrval = lpDD->lpVtbl->SetDisplayMode(lpDD,640,480,8);

memset(&ddsd,0,sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS|DDSD_HEIGHT|DDSD_WIDTH;
ddsd.dwHeight=480; ddsd.dwWidth=640;
ddsd.ddsCaps.dwCaps = DDSC

Author

Commented:
Doesn't make a difference.

Commented:
Just add more flags. Don't expect CreateSurface to automatically creates a surface matching the current screen mode.

Author

Commented:
Any ideas/suggestions as to which ones to try? I tried adding DDSD_BACKBUFFERCOUNT,  DDSD_ALPHABITDEPTH and DDSD_PIXELFORMAT, but nothing changed.

Commented:
There are several possibilities:
1) Use the ddscaps editor provided with dx to check whether the resolution you want is supported. If it's not it will not return a dd_ok.

2) Are u using the directx headers compiled for the cygnus gnu compiler? if u're not u may run into problems

I'm using DX5, my createsurface function requires only 3 parameters.  

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.