ASM Community

this is weird, up untill CreateSurface, everything works fine,
when i do:

        invoke RtlZeroMemory,addr ddsd,SIZEOF DDSURFACEDESC

        mov ddsd.dwSize,SIZEOF DDSURFACEDESC



        ;Windowed Mode

        mov ddsd.dwFlags, DDSD_CAPS

        mov ddsd.ddsCaps.dwCaps, DDSCAPS_PRIMARYSURFACE

        ;Create the PrimarySurface

        DDINVOKE CreateSurface,g_pDD,addr ddsd,addr g_pDDS,NULL

        ...

        ...

creates:

004011A8   > C745 94 6C0000>MOV DWORD PTR SS:[EBP-6C],6C             ;  SIZEOF ddsd

004011AF   . C745 98 010000>MOV DWORD PTR SS:[EBP-68],1              ;  ddsd.dwFlags, DDSD_CAPS

004011B6   . C745 FC 000200>MOV DWORD PTR SS:[EBP-4],200             ;  ddsd.ddsCaps.dwCaps, DDSCAPS_PRIMARYSURFACE

004011BD   . A1 8E414000    MOV EAX,DWORD PTR DS:[40418E]            ;  mov eax , [this]

004011C2   . 8B00           MOV EAX,DWORD PTR DS:[EAX]               ;  mov eax , [eax]

004011C4   . 6A 00          PUSH 0                                   ;  NULL

004011C6   . 68 96414000    PUSH CrazyChi.00404196                   ;  ADDR g_pDDS

004011CB   . 8D45 94        LEA EAX,DWORD PTR SS:[EBP-6C]

004011CE   . 50             PUSH EAX                                 ;  ADDR ddsd

004011CF   . FF35 8E414000  PUSH DWORD PTR DS:[40418E]               ;  g_pDD

004011D5   . FF50 18        CALL NEAR DWORD PTR DS:[EAX+18]          ;  Exeption Here ->  CreateSurface

DDINVOKE	MACRO	func, this, arglist :VARARG

	mov			eax , [this]

	mov			eax , [eax]



	IFB <arglist>

		INVOKE [IDirectDrawVtbl. func][eax], this

	ELSE

		INVOKE [IDirectDrawVtbl. func][eax], this, arglist

	ENDIF

ENDM

i get an exception with EIP=0 ..
EAX's table pointer gets overRide by 'LEA EAX,DWORD PTR SS:'
very weird ..
mabye i have bad ddraw.inc ? (by Diamond Crew)
Thnx

If you are using the BizzareCreations includes, it will error when using Blt.

The invoke will have eax changed by one of the passed parameters.

I changed the macro to use edx as the index reg.