Morning update from Lax ;) New hook, CXStr functions

[Lax]

Came up with this idea last night to show item lore information (can be expanded to other stuff like instrument mods, etc obviously) in the item display window.

EQLib_Hooks.cpp

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// *************************************************************************** 
// Function:    ItemDisplay::Detour 
// Description: Our Item display hook
// *************************************************************************** 
class ItemDisplay
{ 
public: 
	VOID Trampoline(PITEMINFO *pitem,bool unknown); 
	VOID Detour(PITEMINFO *pitem,bool unknown) 
	{ 
		PEQITEMWINDOW This;
		__asm mov [This], ecx;
		PITEMINFO item=*pitem;
		DebugSpew("ItemDisplay(%s,%d)",&item->Name[0],unknown);
		Trampoline(pitem,unknown);
		char out[MAX_STRING];
		sprintf(&out[0],"<c \"#00FFFF\">Item Lore: %s</c><BR>",&item->LoreName[0]);
		AppendCXStr(&This->ItemInfo,&out[0]);
	}
};

// *************************************************************************** 
// Function:    HookItemDisplay
// Description: Hook item display
// *************************************************************************** 
DETOUR_TRAMPOLINE_EMPTY(VOID ItemDisplay::Trampoline(PITEMINFO*,bool)); 

VOID HookItemDisplay(BOOL Patch) 
{ 
	void (ItemDisplay::*pfDetour)(PITEMINFO*,bool) = ItemDisplay::Detour; 
	void (ItemDisplay::*pfTrampoline)(PITEMINFO*,bool) = ItemDisplay::Trampoline; 

	DebugSpewAlways("HookItemDisplay - %satching",(Patch)?"P":"Unp"); 
	if (Patch) { 

        MAKE_OURDETOUR(DETOUR_ITEMDISPLAY, EQADDR_ITEMDISPLAYSETITEM);

		DetourFunctionWithEmptyTrampoline(*(PBYTE*)&pfTrampoline, 
			(PBYTE)EQADDR_ITEMDISPLAYSETITEM, 
			*(PBYTE*)&pfDetour); 
	} else { 
		DetourRemove(*(PBYTE*)&pfTrampoline, 
			*(PBYTE*)&pfDetour); 
	} 

} 

EQLib.h

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// EQLib_Utilites.cpp
extern VOID AppendCXStr(PCXSTR *cxstr, PCHAR text);
extern VOID SetCXStr(PCXSTR *cxstr, PCHAR text);
.
.
.
// EQLib_Hooks.cpp
extern VOID HookItemDisplay(BOOL Patch);
.
.
.
extern DWORD EQADDR_ITEMDISPLAYSETITEM;
extern DWORD EQADDR_CXSTRAPPEND;
extern DWORD EQADDR_CXSTRSET;
.
.
.
#define DETOUR_ITEMDISPLAY  12
#define NDETOURS			13

EQLib_Interp.cpp

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    HookDInput(TRUE);
    HookCommands(TRUE);
    HookMapfile(TRUE);
	HookDisplay(TRUE);
	HookGameEvents(TRUE);
[color=red]HookItemDisplay(TRUE);[/color]
.
.
.
    HookGameEvents(FALSE);
	HookDisplay(FALSE);
    HookMapfile(FALSE);
    HookCommands(FALSE);
    HookDInput(FALSE);
    HookChat(FALSE);
[color=red]	HookItemDisplay(FALSE);[/color]
        HookMemChecker(FALSE);

EQLib_Main.cpp

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DWORD EQADDR_CXSTRAPPEND=0;
DWORD EQADDR_CXSTRSET=0;
DWORD EQADDR_ITEMDISPLAYSETITEM=0;
.
.
.
    GetPrivateProfileString("Function Locations","ItemDisplaySetItem","0",szBuffer,MAX_STRING,ClientINI);   EQADDR_ITEMDISPLAYSETITEM = (DWORD)strtoul(szBuffer,NULL,16);
    GetPrivateProfileString("Function Locations","CXStrAppend","0",szBuffer,MAX_STRING,ClientINI);   EQADDR_CXSTRAPPEND = (DWORD)strtoul(szBuffer,NULL,16);
    GetPrivateProfileString("Function Locations","CXStrSet","0",szBuffer,MAX_STRING,ClientINI);   EQADDR_CXSTRSET = (DWORD)strtoul(szBuffer,NULL,16);

EQLib_Utilities.cpp

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// YES THIS NEEDS TO BE PCXSTR *
VOID AppendCXStr(PCXSTR *cxstr, PCHAR text)
{
	__asm
	{
		push eax;
		push ecx;
		mov ecx, cxstr;
		push text;
		call [EQADDR_CXSTRAPPEND];
		pop ecx;
		pop eax;
	}
}

// YES THIS NEEDS TO BE PCXSTR *
VOID SetCXStr(PCXSTR *cxstr, PCHAR text)
{
	__asm
	{
		push eax;
		push ecx;
		mov ecx, cxstr;
		push text;
		call [EQADDR_CXSTRSET];
		pop ecx;
		pop eax;
	}
}

eqgame.ini

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[Function Locations]
ItemDisplaySetItem=004EED30
CXStrAppend=00538380
CXStrSet=005374B0

MQ.h

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// Lax 10-29-2003
// Actual size 0x16C
typedef struct _EQITEMWINDOW
{
/*0x000*/ struct _CSIDLWND Wnd;
/*0x138*/ BYTE Unknown0x138[0x4];
/*0x13c*/ struct _CSIDLWND *DisplayWnd;
/*0x140*/ BYTE Unknown0x140[0x8];
/*0x148*/ BYTE Unknown0x148;
/*0x149*/ BYTE Unknown0x149[0x3];
/*0x14C*/ PCXSTR ItemInfo;
/*0x150*/ PVOID Unknown0x150; // PCXSTR "item display" ??    _CSIDLWND ??
/*0x154*/ DWORD Unknown0x154; // possibly PCXSTR of information as on charms
/*0x158*/ BYTE  Unknown0x158;
/*0x15C*/ PVOID TextureAnim; 
/*0x160*/ PVOID TextureAnim2; 
/*0x164*/ DWORD Unknown0x164[2];
/*0x16C*/
} EQITEMWINDOW, *PEQITEMWINDOW;

Phew... that should about wrap it up.

The SetCXStr function can be used to replace plaz's workaround for setting CXStr text :)

[Lax]

This make it into cvs/zip?