On Thursday 31 October 2002 14:32, Lionel Ulmer wrote:
Apologies for needing some more hand-holding: from Alexander's advice I now have the game linking and beginning to execute. It now gets stuck while executing this piece of C++:
Hmm, according to the backtrace, it is rather crashing when executing 'User_DirectDraw_EnumDisplayModes' (ie something like mp_directDraw->EnumDisplayModes(...)) in the tDirectDrawScreen::setUpWindowedSurfaces method.
Sorry, that was the method I posted, I happened to paste the wrong function name; this is the entire function with line 852 marked:
------------------------------------------------------------------------------ void tDirectDrawScreen::setUpWindowedSurfaces() { DDSURFACEDESC ddsd; memset(&ddsd,0,sizeof(DDSURFACEDESC)); ddsd.dwSize = sizeof(DDSURFACEDESC);
//Set up the caps for the primary ddsd.dwFlags = DDSD_CAPS; ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
//Finally create the primary surface (line 852) HRESULT hr = mp_directDraw->CreateSurface(&ddsd,&mp_primarySurface,NULL); handleErrors(hr,"Failed to create windowed primary surface.");
//Calculate and preserve current screen size setScreenSize();
//Calculate and store current screen position setScreenPosition();
//Create a "backbuffer" surface exactly the same size as primary createBackBuffer(); } ------------------------------------------------------------------------------
the ddraw trace looks like this:
------------------------------------------------------------------------------ trace:ddraw:initialize enabling DirectDraw HAL trace:ddraw:DDRAW_Create ((null),0x808c718,(nil)) trace:ddraw:DDRAW_FindDriver ((null)) trace:ddraw:HAL_DirectDraw_Create trace:ddraw:HAL_DirectDraw_Construct (0x403a9be0) trace:ddraw:User_DirectDraw_Construct (0x403a9be0,0) trace:ddraw:Main_DirectDraw_QueryInterface (0x403a9be0)->({6c14db80-a733-11ce-a521-0020af0be560},0x808c718) trace:ddraw:Main_DirectDraw_AddRef (0x403a9be0)->() incrementing from 1. trace:ddraw:Main_DirectDraw_Release (0x403a9be0)->() decrementing from 2. fixme:ddraw:Main_DirectDraw_WaitForVerticalBlank (0x403a9be0)->(flags=0x00010021,handle=0x8) trace:ddraw:User_DirectDraw_EnumDisplayModes (0x403a9be0)->(0x40c92c4c,0x808c720,0x40c92be8,0x40f55dfc) trace:ddraw:User_DirectDraw_EnumDisplayModes - mode: 512x384 trace:ddraw:User_DirectDraw_EnumDisplayModes - 8 bpp, R=00000000 G=00000000 B=00000000 (bang!) ------------------------------------------------------------------------------
and the backtrace from the exception looks like this:
------------------------------------------------------------------------------ #0 0x40c92c4c in ?? () #1 0x40f56f5f in User_DirectDraw_EnumDisplayModes (iface=0x403a9be0, dwFlags=1086925740, pDDSD=0x808c720, context=0x40c92be8, callback=0x40f55dfc <EnumDisplayModesCallbackThunk>) at ddraw/user.c:373 #2 0x40f55e81 in IDirectDrawImpl_EnumDisplayModes (This=0x40c92be8, dwFlags=1086925900, pDDSD=0x808c720, context=0x40c92a94, cb=0x40c92a94) at ddraw/thunks.c:348 #3 0x4080f9b2 in tDirectDrawScreen::setUpWindowedSurfaces (this=0x808c710) at Source/tDirectDrawScreen.cpp:852 #4 0x4080cf1f in tDirectDrawScreen::initialise (this=0x808c710, fullScreen=false, screenWidth=640, screenHeight=480) at Source/tDirectDrawScreen.cpp:88 #5 0x4080caac in tDirectDrawScreen::tDirectDrawScreen (this=0x808c710, fullScreen=false, screenWidth=640, screenHeight=480) at Source/tDirectDrawScreen.cpp:55 #6 0x4082d76f in InitApp (hInst=0x40620000, nCmdShow=1) at Source/Main.cpp:289 #7 0x4082d8fc in WinMain (hInst=0x40620000, hPrevInst=0x0, lpCmdLine=0x403710dd "", nCmdShow=1) at Source/Main.cpp:322 #8 0x4062509c in __wine_exe_main () from /home/mattbee/Work/Nemesis/LSNClient.exe #9 0x400b3799 in start_process () at ../../scheduler/process.c:564 #10 0x400b76c9 in call_on_thread_stack (func=0x400b3558) at ../../scheduler/sysdeps.c:112 ------------------------------------------------------------------------------
From what I see, I wonder if the enum procedure you give to DDraw has the right protoype (ie is it a STDCALL or a CDECL function) ?
I'm not supplying any procedure to DDraw; could it be that some linking problem has caused EnumDisplayModes to be called instead of CreateSurface? That's what the backtrace implies. I've tried a rebuild of the relevant source files just in case but the same thing happens.
If it helps, this is the function that creates the mp_directDraw variable, called before setUpWindowedSurfaces:
------------------------------------------------------------------------------ void tDirectDrawScreen::createDirectDrawObject() { HRESULT hr = DirectDrawCreate(0,&mp_directDraw,NULL); handleErrors(hr,"Failed to create Direct Draw Object."); } ------------------------------------------------------------------------------
cheers,