Initial commit

Call DirectDrawCreate or DirectDrawCreateEx with a GUID of NULL, DDCREATE_EMULATIONONLY or DDCREATE_HARDWAREONLY.

Author: hdc0

CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.7.1)
+project("DirectDrawTest" CXX)
+
+add_executable(DirectDrawTest DirectDrawTest.cpp)
+target_compile_definitions(DirectDrawTest PRIVATE -DUNICODE -D_UNICODE)
+target_link_libraries(DirectDrawTest ddraw.lib dxguid.lib)

DirectDrawTest.bat

@@ -0,0 +1,8 @@
+@echo off
+
+DirectDrawTest.exe
+DirectDrawTest.exe /emulationonly
+DirectDrawTest.exe /hardwareonly
+DirectDrawTest.exe /ex
+DirectDrawTest.exe /ex /emulationonly
+DirectDrawTest.exe /ex /hardwareonly

DirectDrawTest.cpp

@@ -0,0 +1,57 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cwchar>
+
+#include <ddraw.h>
+
+int wmain(int argc, wchar_t **argv)
+{
+	bool useDirectDrawCreateEx = false;
+	const wchar_t *funcDesc = L"DirectDrawCreate";
+	GUID *guid = nullptr;
+	const wchar_t *guidDesc = L"NULL";
+
+	// Parse command line arguments
+	for (int i = 1; i < argc; ++i)
+	{
+		if (wcsicmp(argv[i], L"/ex") == 0)
+		{
+			useDirectDrawCreateEx = true;
+			funcDesc = L"DirectDrawCreateEx";
+		}
+		else if (wcsicmp(argv[i], L"/emulationonly") == 0)
+		{
+			guid = reinterpret_cast<GUID *>(DDCREATE_EMULATIONONLY);
+			guidDesc = L"DDCREATE_EMULATIONONLY";
+		}
+		else if (wcsicmp(argv[i], L"/hardwareonly") == 0)
+		{
+			guid = reinterpret_cast<GUID *>(DDCREATE_HARDWAREONLY);
+			guidDesc = L"DDCREATE_HARDWAREONLY";
+		}
+		else
+		{
+			std::fwprintf(stderr, L"Invalid command line argument: %s\n", argv[i]);
+			return EXIT_FAILURE;
+		}
+	}
+
+	// Call DirectDrawCreate or DirectDrawCreateEx with the specified GUID
+	HRESULT resultDDC;
+	if (!useDirectDrawCreateEx)
+	{
+		IDirectDraw *lpDD;
+		resultDDC = DirectDrawCreate(guid, &lpDD, nullptr);
+		if (resultDDC == DD_OK) lpDD->Release();
+	}
+	else
+	{
+		IDirectDraw7 *lpDD;
+		resultDDC = DirectDrawCreateEx(guid,
+			reinterpret_cast<LPVOID *>(&lpDD), IID_IDirectDraw7, nullptr);
+		if (resultDDC == DD_OK) lpDD->Release();
+	}
+	std::wprintf(L"%s returned 0x%08X for GUID %s\n", funcDesc, resultDDC, guidDesc);
+
+	return EXIT_SUCCESS;
+}