From 3eddaf80525ca1a7b156179bf87e09c55386aee6 Mon Sep 17 00:00:00 2001
From: harry <hrosen2016@gmail.com>
Date: Sun, 14 Aug 2022 20:15:50 -0400
Subject: [PATCH] Fixed Qt GUI --help command line option when no window system
 is present (X11/wayland). There is now a pre-gui initialization sweep of
 command line options. Also added a --version command line option and a
 warning that the --no-gui option is not supported (should someone try to use
 it). Fixes issue #528.

---
 src/drivers/Qt/fceuWrapper.cpp | 24 ++++++++++++++++++++----
 src/drivers/Qt/fceuWrapper.h   |  1 +
 src/drivers/Qt/main.cpp        |  5 ++++-
 3 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/src/drivers/Qt/fceuWrapper.cpp b/src/drivers/Qt/fceuWrapper.cpp
index d701fcfb..8c5ef9e7 100644
--- a/src/drivers/Qt/fceuWrapper.cpp
+++ b/src/drivers/Qt/fceuWrapper.cpp
@@ -642,6 +642,7 @@ static const char *DriverUsage =
 static void ShowUsage(const char *prog)
 {
 	int i,j;
+	FCEUD_Message("Starting " FCEU_NAME_AND_VERSION "...\n");
 	printf("\nUsage is as follows:\n%s <options> filename\n\n",prog);
 	puts(DriverUsage);
 #ifdef _S9XLUA_H
@@ -681,11 +682,9 @@ static void ShowUsage(const char *prog)
 	
 }
 
-int  fceuWrapperInit( int argc, char *argv[] )
+// Pre-GUI initialization.
+int  fceuWrapperPreInit( int argc, char *argv[] )
 {
-	int opt, error;
-	std::string s;
-
 	for (int i=0; i<argc; i++)
 	{
 		if ( (strcmp(argv[i], "--help") == 0) || (strcmp(argv[i],"-h") == 0) )
@@ -693,7 +692,24 @@ int  fceuWrapperInit( int argc, char *argv[] )
 			ShowUsage(argv[0]);
 			exit(0);
 		}
+		else if ( strcmp(argv[i], "--no-gui") == 0)
+		{
+			printf("Error: Qt/SDL version does not support --no-gui option.\n");
+			exit(1);
+		}
+		else if ( strcmp(argv[i], "--version") == 0)
+		{
+			printf("%i.%i.%i\n", FCEU_VERSION_MAJOR, FCEU_VERSION_MINOR, FCEU_VERSION_PATCH);
+			exit(0);
+		}
 	}
+	return 0;
+}
+
+int  fceuWrapperInit( int argc, char *argv[] )
+{
+	int opt, error;
+	std::string s;
 
 	FCEUD_Message("Starting " FCEU_NAME_AND_VERSION "...\n");
 
diff --git a/src/drivers/Qt/fceuWrapper.h b/src/drivers/Qt/fceuWrapper.h
index b5106201..65534ae0 100644
--- a/src/drivers/Qt/fceuWrapper.h
+++ b/src/drivers/Qt/fceuWrapper.h
@@ -30,6 +30,7 @@ int CloseGame(void);
 int reloadLastGame(void);
 int LoadGameFromLua( const char *path );
 
+int  fceuWrapperPreInit( int argc, char *argv[] );
 int  fceuWrapperInit( int argc, char *argv[] );
 int  fceuWrapperMemoryCleanup( void );
 int  fceuWrapperClose( void );
diff --git a/src/drivers/Qt/main.cpp b/src/drivers/Qt/main.cpp
index 0c2f1f69..1974ac29 100644
--- a/src/drivers/Qt/main.cpp
+++ b/src/drivers/Qt/main.cpp
@@ -95,7 +95,10 @@ static bool showSplashScreen(void)
 
 int main( int argc, char *argv[] )
 {
-	int retval;
+	int retval = 0;
+
+	fceuWrapperPreInit(argc, argv);
+
 	qInstallMessageHandler(MessageOutput);
 	QApplication app(argc, argv);