* Feature: Add TORQUE_DYNAMIC_LIBRARY as an experimental flag to allow building the core engine as a shared library.

CMakeLists.txt

@@ -116,6 +116,9 @@ mark_as_advanced(TORQUE_ADVANCED_LIGHTING)
 option(TORQUE_BASIC_LIGHTING "Basic Lighting" ON)
 mark_as_advanced(TORQUE_APP_PASSWORD)
 
+option(TORQUE_DYNAMIC_LIBRARY "Whether or not to build Torque as a dynamic library." OFF)
+mark_as_advanced(TORQUE_DYNAMIC_LIBRARY)
+
 set(TORQUE_APP_PASSWORD "changeme" CACHE STRING "zip file password")
 
 if(WIN32)

Engine/source/CMakeLists.txt

@@ -63,9 +63,15 @@ endif (TORQUE_BASIC_LIGHTING)
 
 # On Windows we disable CRT Security warnings - this comes from recommendations to use non-portable functions.
 if (WIN32)
-	set(TORQUE_COMPILE_DEFINITIONS ${TORQUE_COMPILE_DEFINITIONS} _CRT_SECURE_NO_WARNINGS)
+	set(TORQUE_COMPILE_DEFINITIONS ${TORQUE_COMPILE_DEFINITIONS} _CRT_SECURE_NO_WARNINGS WIN32)
 endif (WIN32)
 
+if (APPLE)
+  set(TORQUE_COMPILE_DEFINITIONS ${TORQUE_COMPILE_DEFINITIONS} __MACOSX__)
+elseif (UNIX)
+  set(TORQUE_COMPILE_DEFINITIONS ${TORQUE_COMPILE_DEFINITIONS} __linux__)
+endif (APPLE)
+
 ################# Set Engine Linkages ###################
 
 # When on Windows, we need to link against winsock and windows codecs
@@ -95,8 +101,6 @@ endif (UNIX AND NOT APPLE)
 
 ################# Collect Source Files ###################
 
-torqueAddSourceDirectories("main")
-
 # Handle app
 torqueAddSourceDirectories("app" "app/net")
 
@@ -324,6 +328,22 @@ endif (APPLE)
 
 ################# Executable Generation ###################
 
+if (TORQUE_DYNAMIC_LIBRARY)
+  set(TORQUE_COMPILE_DEFINITIONS ${TORQUE_COMPILE_DEFINITIONS} TORQUE_SHARED)
+
+  # Build the main engine library
+  add_library(TorqueEngine SHARED ${TORQUE_SOURCE_FILES})
+  target_compile_definitions(TorqueEngine PUBLIC ${TORQUE_COMPILE_DEFINITIONS})
+  target_link_libraries(TorqueEngine ${TORQUE_LINK_LIBRARIES})
+  target_include_directories(TorqueEngine PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} "${CMAKE_BINARY_DIR}/temp" ${TORQUE_INCLUDE_DIRECTORIES})
+  target_compile_features(TorqueEngine PRIVATE cxx_std_17)
+
+  set(TORQUE_SOURCE_FILES "main/main.cpp")
+  set(TORQUE_LINK_LIBRARIES TorqueEngine)
+else()
+  set(TORQUE_SOURCE_FILES "main/main.cpp" ${TORQUE_SOURCE_FILES})
+endif (TORQUE_DYNAMIC_LIBRARY)
+
 if (APPLE)
 	add_executable(${TORQUE_APP_NAME} MACOSX_BUNDLE ${TORQUE_SOURCE_FILES})
 	set_target_properties(${TORQUE_APP_NAME} PROPERTIES MACOSX_BUNDLE_INFO_PLIST "${CMAKE_BINARY_DIR}/temp/Info.plist")

Engine/source/main/main.cpp

@@ -100,121 +100,44 @@ int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdL
 }
 #endif // WIN32
 
-
 #ifdef __MACOSX__
 
 #include <dlfcn.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <libgen.h> // for dirname
+#include <filesystem>
+#include <mach-o/dyld.h> // for _NSGetExecutablePath
 #include <Carbon/Carbon.h>
 
 extern "C" {
 
    int (*torque_macmain)(int argc, const char **argv) = 0;
 
-}
+}  
-
-void GetBasePath(const char** cpath, const char** cname)
-{
-   static char path[2049];
-   static char name[2049];
-
-   ProcessSerialNumber PSN;
-   ProcessInfoRec pinfo;
-   FSSpec pspec;
-   FSRef fsr;
-   OSStatus err;
-
-   path[0] = 0;
-   name[0] = 0;
-
-   *cpath = path;
-   *cname = name;
-
-   // set up process serial number
-   PSN.highLongOfPSN = 0;
-   PSN.lowLongOfPSN = kCurrentProcess;
-
-   // set up info block
-   pinfo.processInfoLength = sizeof(pinfo);
-   pinfo.processName = NULL;
-   pinfo.processAppSpec = &pspec;
-
-   // grab the vrefnum and directory
-   err = GetProcessInformation(&PSN, &pinfo);
-   if (! err ) {
-
-      FSSpec fss2;
-
-      strcpy(name, &pspec.name[1]);
-
-      err = FSMakeFSSpec(pspec.vRefNum, pspec.parID, 0, &fss2);
-
-      if ( ! err ) {
-         err = FSpMakeFSRef(&fss2, &fsr);
-         if ( ! err ) {
-            err = (OSErr)FSRefMakePath(&fsr, (UInt8*)path, 2048);
-         }
-      }
-   }
-}
 
 int main(int argc, const char **argv)
 {
-   void *gameBundle = 0;
+   char path[PATH_MAX];
-   char gameBundleFilename[2049];
+   uint32_t pathLen = sizeof(path);
+   int err = _NSGetExecutablePath(path, &pathLen);
 
-   const char* basePath;
+   char* executableDirectory = dirname(path);
-   const char* appName;
 
-   // Get the path to our app binary and the app name
+   // Once the executable directory is determined, we search two possibilities: The frameworks and next to the app bundle
+   chdir(executableDirectory);
+   chdir("../Frameworks");
 
-   GetBasePath(&basePath, &appName);
+   void *gameLib = dlopen("libTorqueEngine.dylib", RTLD_LAZY | RTLD_LOCAL);
-
+   if (!gameLib)
-   if (!basePath[0] || !appName[0])
-      return;
-
-   char appNameNoDebug[2049];
-
-   strcpy(appNameNoDebug, appName);
-
-   int i = strlen(appName);
-   while (i > 0)
    {
-      if (!strcmp(&appName[i], "_DEBUG"))
-      {
-         appNameNoDebug[i] = 0;
-         break;
-      }
-
-      i--;
-   }
-
-   sprintf(gameBundleFilename, "%s.app/Contents/Frameworks/%s Bundle.bundle/Contents/MacOS/%s Bundle", appName, appNameNoDebug, appNameNoDebug);
-
-   // first see if the current directory is set properly
-   gameBundle = dlopen(gameBundleFilename, RTLD_LAZY | RTLD_LOCAL);
-
-   if (!gameBundle)
-   {
-      // Couldn't load the game bundle... so, using the path to the bundle binary fix up the cwd
-
-      if (basePath[0]) {
-         chdir( basePath );
-         chdir( "../../../" );
-      }
-
-      // and try again
-      gameBundle = dlopen( gameBundleFilename, RTLD_LAZY | RTLD_LOCAL);
-   }
-
-   if (!gameBundle)
       return -1;
+   }
 
-   torque_macmain = (int (*)(int argc, const char **argv)) dlsym(gameBundle, "torque_macmain");
+   torque_macmain = (int (*)(int argc, const char **argv)) dlsym(gameLib, "torque_macmain");
 
    if (!torque_macmain)
-      return -1;
+      return -2;
 
    return torque_macmain(argc, argv);
 }