Textractor_test/texthook/engine/match64.cc

#include "match.h"
#include "main.h"
#include "native/pchooks.h"
#include "engine.h"
#include "util.h"

namespace Engine
{
	/** Artikash 6/7/2019
*   PPSSPP JIT code has pointers, but they are all added to an offset before being used.
	Find that offset so that hook searching works properly.
	To find the offset, find a page of mapped memory with size 0x1f00000, read and write permissions, take its address and subtract 0x8000000.
	The above is useful for emulating PSP hardware, so unlikely to change between versions.
*/
	bool FindPPSSPP()
	{
		bool found = false;
		SYSTEM_INFO systemInfo;
		GetNativeSystemInfo(&systemInfo);
		for (BYTE* probe = NULL; probe < systemInfo.lpMaximumApplicationAddress;)
		{
			MEMORY_BASIC_INFORMATION info;
			if (!VirtualQuery(probe, &info, sizeof(info)))
			{
				probe += systemInfo.dwPageSize;
			}
			else
			{
				if (info.RegionSize == 0x1f00000 && info.Protect == PAGE_READWRITE && info.Type == MEM_MAPPED)
				{
					found = true;
					ConsoleOutput("Textractor: PPSSPP memory found: searching for hooks should yield working hook codes");
					memcpy(spDefault.pattern, Array<BYTE>{ 0x79, 0x10, 0x41, 0xc7 }, spDefault.length = 4);
					spDefault.offset = 0;
					spDefault.minAddress = 0;
					spDefault.maxAddress = -1ULL;
					spDefault.padding = (uintptr_t)probe - 0x8000000;
					spDefault.hookPostProcesser = [](HookParam& hp) { hp.type |= NO_CONTEXT; };
				}
				probe += info.RegionSize;
			}
		}
		return found;
	}

	bool UnsafeDetermineEngineType()
	{
		if (Util::CheckFile(L"PPSSPP*.exe") && FindPPSSPP()) return true;

		for (std::wstring DXVersion : { L"d3dx9", L"d3dx10" })
			if (HMODULE module = GetModuleHandleW(DXVersion.c_str())) PcHooks::hookD3DXFunctions(module);
			else for (int i = 0; i < 50; ++i)
				if (HMODULE module = GetModuleHandleW((DXVersion + L"_" + std::to_wstring(i)).c_str())) PcHooks::hookD3DXFunctions(module);

		PcHooks::hookGDIFunctions();
		PcHooks::hookGDIPlusFunctions();
		return false;
	}
}