From 2c30239ed6879ed0ce0d0352f59036aa2518e94c Mon Sep 17 00:00:00 2001
From: Rollin'Barrel <rlnbrl.stuff@gmail.com>
Date: Sun, 21 Sep 2025 11:28:45 +0300
Subject: [PATCH] add launch param API's

---
 native/common.cpp | 18 ++++++++++++++++++
 native/events.h   |  1 +
 steam/Api.hx      | 17 +++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/native/common.cpp b/native/common.cpp
index b9d5f64..b16799b 100644
--- a/native/common.cpp
+++ b/native/common.cpp
@@ -181,6 +181,22 @@ HL_PRIM vbyte *HL_NAME(get_current_game_language)(){
 	return (vbyte*)SteamApps()->GetCurrentGameLanguage();
 }
 
+HL_PRIM vbyte *HL_NAME(get_launch_command_line)(){
+	if (!CheckInit()) return NULL;
+	char *pszCommandLine = (char *)hl_gc_alloc_noptr(4096);
+	int size = SteamApps()->GetLaunchCommandLine(pszCommandLine, 4096);
+	return (vbyte*)pszCommandLine;
+}
+
+HL_PRIM vbyte *HL_NAME(get_launch_query_param)(vbyte *pchKey){
+	if (!CheckInit()) return NULL;
+	return (vbyte*)SteamApps()->GetLaunchQueryParam((char*)pchKey);
+}
+
+vdynamic *CallbackHandler::EncodeNewUrlLaunchParameters(NewUrlLaunchParameters_t *d) {
+	return NULL;
+}
+
 HL_PRIM bool HL_NAME(is_dlc_installed)( int appid ) {
 	return SteamApps()->BIsDlcInstalled((AppId_t)appid);
 }
@@ -347,6 +363,8 @@ DEFINE_PRIM(_BOOL, is_steam_in_big_picture_mode, _NO_ARG);
 DEFINE_PRIM(_BOOL, is_steam_running_on_steam_deck, _NO_ARG);
 DEFINE_PRIM(_BOOL, is_steam_running, _NO_ARG);
 DEFINE_PRIM(_BYTES, get_current_game_language, _NO_ARG);
+DEFINE_PRIM(_BYTES, get_launch_command_line, _NO_ARG);
+DEFINE_PRIM(_BYTES, get_launch_query_param, _BYTES);
 DEFINE_PRIM(_BYTES, get_auth_ticket, _REF(_I32) _REF(_I32));
 DEFINE_PRIM(_VOID, request_encrypted_app_ticket, _BYTES _I32 _FUN(_VOID, _BYTES _I32));
 DEFINE_PRIM(_VOID, cancel_call_result, _CRESULT);
diff --git a/native/events.h b/native/events.h
index 73bd848..eee025e 100644
--- a/native/events.h
+++ b/native/events.h
@@ -2,6 +2,7 @@
 EVENT_DECL( PersonaChange, PersonaStateChange_t )
 EVENT_DECL( OverlayActivated, GameOverlayActivated_t )
 EVENT_DECL( AuthSessionTicketResponse, GetAuthSessionTicketResponse_t )
+EVENT_DECL( NewUrlLaunchParameters, NewUrlLaunchParameters_t )
 
 // matchmaking
 EVENT_DECL( LobbyData, LobbyDataUpdate_t )
diff --git a/steam/Api.hx b/steam/Api.hx
index 8372399..db95aaa 100644
--- a/steam/Api.hx
+++ b/steam/Api.hx
@@ -61,6 +61,7 @@ class Api
 	// User-settable Callbacks
 
 	public static var onOverlay : Bool -> Void;
+	public static var onNewUrlLaunchParameters : Void -> Void;
 
 	/**
 	 * @param appId_	Your Steam APP ID (the numbers on the end of your store page URL - store.steampowered.com/app/XYZ)
@@ -92,6 +93,12 @@ class Api
 			}
 		});
 
+		// NewUrlLaunchParameters_t
+		registerGlobalEvent(1000 + 14, function(data:{ok:Bool}) {
+			if ( onNewUrlLaunchParameters != null )
+				onNewUrlLaunchParameters();
+		});
+
 		// if we get this far, the dlls loaded ok and we need Steam to init.
 		// otherwise, we're trying to run the Steam version without the Steam client
 		active = _Init(steamWrap_onEvent, onGlobalEvent);
@@ -201,6 +208,16 @@ class Api
 		return l==null ? null : @:privateAccess String.fromUTF8(l);
 	}
 
+	public static function getLaunchCommandLine():String {
+		var l = _GetLaunchCommandLine();
+		return l==null ? null : @:privateAccess String.fromUTF8(l);
+	}
+
+	public static function getLaunchQueryParam(query:String):String {
+		var l = _GetLaunchQueryParam(@:privateAccess query.toUtf8());
+		return l==null ? null : @:privateAccess String.fromUTF8(l);
+	}
+
 	public static function getCurrentBetaName():String {
 		var l = _GetCurrentBetaName();
 		return l == null ? null : @:privateAccess String.fromUTF8(l);