DirectX 9 In ASM

[th4natos]

Credits to Flyke!

++++++++++++++++++++++

Hi there,

although here are many tutorials about ingame menus I did not found one clashed together source for asm (masm32 in this special case). And after getting this to work a while ago I decided to make a tutorial out of that and now it is also translated into english.
Hope it is useful for some of you. This is only the first part where you learn to setup your own Direct3D window using nothing else than masm32. In the second part (coming soon) I will show how to implement a menu into any DirectX 9 application/game.

So download the tutorial/source here (http://flyke.fl.ohost.de/downloads/tutorial1_eng.asm).

Compile this with:


ml /c /Cp /coff tutorial1_eng.asm
link /subsystem:windows tutorial1_eng.obj

Inside the tutorial I mention something about VTables and offsets of functions inside (you will see). Now I explain how to get those offsets.
Search inside the DirectX 9 SDK includes and you will find something like this:


DECLARE_INTERFACE_(IDirect3D9, IUnknown)
{
/*** IUnknown methods ***/
STDMETHOD(QueryInterface)(THIS_ REFIID riid, void** ppvObj) PURE;
STDMETHOD_(ULONG,AddRef)(THIS) PURE;
STDMETHOD_(ULONG,Release)(THIS) PURE;

/*** IDirect3D9 methods ***/
STDMETHOD(RegisterSoftwareDevice)(THIS_ void* pInitializeFunction) PURE;
STDMETHOD_(UINT, GetAdapterCount)(THIS) PURE;
STDMETHOD(GetAdapterIdentifier)(THIS_ UINT Adapter,DWORD Flags,D3DADAPTER_IDENTIFIER9* pIdentifier) PURE;
STDMETHOD_(UINT, GetAdapterModeCount)(THIS_ UINT Adapter,D3DFORMAT Format) PURE;
STDMETHOD(EnumAdapterModes)(THIS_ UINT Adapter,D3DFORMAT Format,UINT Mode,D3DDISPLAYMODE* pMode) PURE;
STDMETHOD(GetAdapterDisplayMode)(THIS_ UINT Adapter,D3DDISPLAYMODE* pMode) PURE;
STDMETHOD(CheckDeviceType)(THIS_ UINT Adapter,D3DDEVTYPE DevType,D3DFORMAT AdapterFormat,D3DFORMAT BackBufferFormat,BOOL bWindowed) PURE;
STDMETHOD(CheckDeviceFormat)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,D3DFORMAT AdapterFormat,DWORD Usage,D3DRESOURCETYPE RType,D3DFORMAT CheckFormat) PURE;
STDMETHOD(CheckDeviceMultiSampleType)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,D3DFORMAT SurfaceFormat,BOOL Windowed,D3DMULTISAMPLE_TYPE MultiSampleType,DWORD* pQualityLevels) PURE;
STDMETHOD(CheckDepthStencilMatch)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,D3DFORMAT AdapterFormat,D3DFORMAT RenderTargetFormat,D3DFORMAT DepthStencilFormat) PURE;
STDMETHOD(CheckDeviceFormatConversion)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,D3DFORMAT SourceFormat,D3DFORMAT TargetFormat) PURE;
STDMETHOD(GetDeviceCaps)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,D3DCAPS9* pCaps) PURE;
STDMETHOD_(HMONITOR, GetAdapterMonitor)(THIS_ UINT Adapter) PURE;
STDMETHOD(CreateDevice)(THIS_ UINT Adapter,D3DDEVTYPE DeviceType,HWND hFocusWindow,DWORD BehaviorFlags,D3DPRESENT_PARAMETERS* pPresentationParameters,IDirect3DDevice9** ppReturnedDeviceInterface) PURE;

#ifdef D3D_DEBUG_INFO
LPCWSTR Version;
#endif
};

It is C++ stuff but don't worry. If you need the offset for "CreateDevice" then start counting ...
Count the STDMETHOD only, so "CreateDevice" would be the 17th function. Subtract 1 because this a zero based index and multiply by 4 ... so offset of "CreateDevice" is 16 * 4 = 64 (40 in hex).

regards Flyke