Get the magicleap immersive mode demo to take a filename argument

demo/magicleap/src/lib.rs

@@ -56,7 +56,7 @@ mod magicleap;
 mod mocked_c_api;
 
 #[no_mangle]
-pub extern "C" fn magicleap_pathfinder_demo(egl_display: EGLDisplay, egl_context: EGLContext) {
+pub unsafe extern "C" fn magicleap_pathfinder_demo(egl_display: EGLDisplay, egl_context: EGLContext, file_name: *const c_char) {
     unsafe { c_api::MLLoggingLog(c_api::MLLogLevel::Info, &b"Pathfinder Demo\0"[0], &b"Initializing\0"[0]) };
 
     let tag = CString::new("Pathfinder Demo").unwrap();
@@ -75,7 +75,11 @@ pub extern "C" fn magicleap_pathfinder_demo(egl_display: EGLDisplay, egl_context
     options.mode = Mode::VR;
     options.jobs = Some(3);
     options.pipeline = 0;
-
+    if let Some(file_name) = file_name.as_ref() {
+       let file_name = CStr::from_ptr(file_name).to_string_lossy().into_owned();
+       options.input_path = SVGPath::Resource(file_name);
+    }
+    
     let mut app = DemoApp::new(window, window_size, options);
     debug!("Initialized app");
 

demo/magicleap/src/main.cpp

@@ -24,12 +24,13 @@
 #include <ml_graphics.h>
 #include <ml_head_tracking.h>
 #include <ml_perception.h>
+#include <ml_fileinfo.h>
 #include <ml_lifecycle.h>
 #include <ml_logging.h>
 #include <ml_privileges.h>
 
 // Entry point to the Rust code
-extern "C" MLResult magicleap_pathfinder_demo(EGLDisplay egl_display, EGLContext egl_context);
+extern "C" MLResult magicleap_pathfinder_demo(EGLDisplay egl_display, EGLContext egl_context, const char* file_name);
 
 // Initialization of the scene thread
 extern "C" void init_scene_thread(uint64_t id) {
@@ -181,13 +182,56 @@ int main() {
     return -1;
   }
 
+  // Get the file argument if there is one
+  MLLifecycleInitArgList* arg_list = nullptr;
+  const MLLifecycleInitArg* arg = nullptr;
+  const MLFileInfo* file_info = nullptr;
+  const char* file_name = nullptr;
+  int64_t arg_list_len = 0;
+  int64_t file_list_len = 0;
+    
+  if (MLResult_Ok != MLLifecycleGetInitArgList(&arg_list)) {
+    ML_LOG(Error, "%s: Failed to get init args.", application_name);
+    return -1;
+  }
+
+  if (MLResult_Ok != MLLifecycleGetInitArgListLength(arg_list, &arg_list_len)) {
+    ML_LOG(Error, "%s: Failed to get init arg length.", application_name);
+    return -1;
+  }
+
+  if (arg_list_len) {
+    if (MLResult_Ok != MLLifecycleGetInitArgByIndex(arg_list, 0, &arg)) {
+      ML_LOG(Error, "%s: Failed to get init arg.", application_name);
+      return -1;
+    }
+
+    if (MLResult_Ok != MLLifecycleGetFileInfoListLength(arg, &file_list_len)) {
+      ML_LOG(Error, "%s: Failed to get file list length.", application_name);
+      return -1;
+    }
+  }
+
+  if (file_list_len) {
+    if (MLResult_Ok != MLLifecycleGetFileInfoByIndex(arg, 0, &file_info)) {
+      ML_LOG(Error, "%s: Failed to get file info.", application_name);
+      return -1;
+    }
+
+    if (MLResult_Ok != MLFileInfoGetFileName(file_info, &file_name)) {
+      ML_LOG(Error, "%s: Failed to get file name.", application_name);
+      return -1;
+    }
+  }
+
   // Run the demo!
-  ML_LOG(Info, "%s: Begin demo.", application_name);
-  MLResult status = magicleap_pathfinder_demo(graphics_context.egl_display, graphics_context.egl_context);
+  ML_LOG(Info, "%s: Begin demo (%s).", application_name, file_name);
+  MLResult status = magicleap_pathfinder_demo(graphics_context.egl_display, graphics_context.egl_context, file_name);
   ML_LOG(Info, "%s: End demo (%d).", application_name, status);
 
   // Shut down
   MLPerceptionShutdown();
+  MLLifecycleFreeInitArgList(&arg_list);
 
   return 0;
 }