139 lines
2.7 KiB
C++
139 lines
2.7 KiB
C++
#include "..\STDInclude.hpp"
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namespace Components
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{
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bool AssetHandler::BypassState = false;
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std::map<Game::XAssetType, AssetHandler::Callback> AssetHandler::TypeCallbacks;
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std::vector<AssetHandler::RestrictCallback> AssetHandler::RestrictCallbacks;
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Game::XAssetHeader AssetHandler::FindAsset(Game::XAssetType type, const char* filename)
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{
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Game::XAssetHeader header = { 0 };
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// Allow call DB_FindXAssetHeader within the hook
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AssetHandler::BypassState = true;
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if (AssetHandler::TypeCallbacks.find(type) != AssetHandler::TypeCallbacks.end())
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{
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header = AssetHandler::TypeCallbacks[type](type, filename);
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}
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// Disallow calling DB_FindXAssetHeader ;)
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AssetHandler::BypassState = false;
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return header;
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}
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void __declspec(naked) AssetHandler::FindAssetStub()
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{
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__asm
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{
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push ecx
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push ebx
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push ebp
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push esi
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push edi
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// Check if custom handler should be bypassed
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xor eax, eax
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mov al, AssetHandler::BypassState
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test al, al
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jnz finishOriginal
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mov ecx, [esp + 18h] // Asset type
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mov ebx, [esp + 1Ch] // Filename
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push ebx
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push ecx
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call AssetHandler::FindAsset
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add esp, 8h
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test eax, eax
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jnz finishFound
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finishOriginal:
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// Asset not found using custom handlers, redirect to DB_FindXAssetHeader
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mov ebx, ds:6D7190h // InterlockedDecrement
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mov eax, 40793Bh
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jmp eax
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finishFound:
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pop edi
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pop esi
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pop ebp
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pop ebx
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pop ecx
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retn
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}
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}
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bool AssetHandler::IsAssetEligible(Game::XAssetType type, Game::XAssetHeader *asset)
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{
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const char* name = Game::DB_GetXAssetNameHandlers[type](asset);
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if (!name) return false;
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for (auto callback : AssetHandler::RestrictCallbacks)
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{
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if (!callback(type, *asset, name))
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{
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return false;
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}
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}
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return true;
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}
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void __declspec(naked) AssetHandler::AddAssetStub()
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{
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__asm
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{
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push [esp + 8]
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push [esp + 8]
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call AssetHandler::IsAssetEligible
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add esp, 08h
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test al, al
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jz doNotLoad
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// push [esp + 8]
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// push [esp + 8]
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// call DoBeforeLoadAsset
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// add esp, 08h
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mov eax, [esp + 8]
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sub esp, 14h
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mov ecx, 5BB657h
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jmp ecx
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doNotLoad:
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mov eax, [esp + 8]
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retn
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}
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}
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void AssetHandler::OnFind(Game::XAssetType type, AssetHandler::Callback callback)
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{
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AssetHandler::TypeCallbacks[type] = callback;
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}
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void AssetHandler::OnLoad(RestrictCallback callback)
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{
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AssetHandler::RestrictCallbacks.push_back(callback);
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}
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AssetHandler::AssetHandler()
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{
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Utils::Hook(Game::DB_FindXAssetHeader, AssetHandler::FindAssetStub).Install()->Quick();
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Utils::Hook(0x5BB650, AssetHandler::AddAssetStub, HOOK_JUMP).Install()->Quick();
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}
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AssetHandler::~AssetHandler()
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{
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AssetHandler::TypeCallbacks.clear();
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}
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}
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