OK. I know how to code win32 & GDI in asm but DirectX brings me some difficulties... Does someone know any tutorials on DirectX-asm? Press any key to continue or any other key to quit...

I have exactly opposite problem. Meaning, I know exactly how to use DirectX with asm, but doing the same in C++ brings me LOTS of difficulties (no kidding). So, if you wanna ask a concrete question, either ask it here or mail me.

Thanks for replying Friday13!

My problem is this:
Normally I would create a D3D-object in C++ like this:

    LPDIRECT3D8 g_pD3D = NULL;// Then I would get the current desktop display mode, so I can set up a backbuffer of the same format.D3DDISPLAYMODE d3ddm;if( FAILED( g_pD3D->GetAdapterDisplayMode( D3DADAPTER_DEFAULT, &d3ddm ) ) ) { ... }    

I have no idea how to implement the above code to ASM. That call to GetAdapterDisplayMode() is really strange to do in ASM. Oh yeah, I didn't mention earlier, I am using only Turbo Assembler and I don't know if MASM is better... Does someone know about that?

-Viljami Korhonen




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Edited by - MindFlayer on August 3, 2001 5:51:14 AM

Edited by - MindFlayer on August 3, 2001 5:52:43 AM

Well, unless you''ve omitted some code, I wouldn''t
think calling NULL->SomeMethod may be advisable.

Normally, what you do first is obtain a valid
interface to D3D8, like this:

push 120 ;D3D_SDK_VERSION
call Direct3DCreate8

;no-zero means success

or eax,eax
jnz got_d3d8

;else error
call HandleError
jmp BailOut

got_d3d8:
mov [D3D8],eax
------------------------------------------

You call the methods of any interface like this:
...
push param3
push param2
push param1

mov eax,[Interface]
push eax
mov ecx,[eax]
call dword ptr [ecx+MethodOrdinal*4]


where MethodOrdinal is the method''s order of appearance in
d3d8.h file. For instance, GetAdapterDisplayMode appears 8th
(starting with 0 for QueryInterface) in the list of IDirect3D8 methods, so you call it like this:

push offset My_D3DDISPLAYMODE
push AdapterNo

mov eax,[D3D8]
push eax
mov ecx,[eax]
call dword ptr [ecx+8*4] ;means D3D8->GetAdapterDisplayMode

;zero means success

or eax, eax
jz EverythingOK

;else error

;--------------------------------------------------

I personally use MASM ''cos TASM doesn''t understand MMX and SSE,
but generally I don''t really think there''s big difference.

Hey Friday13, Huge thanks for you! I got everything working now! Your example was so good that I''m gonna save it to my disk !

Thanks for you too, Scronty. I''ll check those tutorials when my Internet connection agrees with me .

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