From dd0917adca082762ceb25f77be3b863869ca4ce8 Mon Sep 17 00:00:00 2001
From: Holger Schemel <holger.schemel@virtion.de>
Date: Fri, 20 Dec 2024 18:46:57 +0100
Subject: [PATCH] added command line option to list available SDL render
 drivers

---
 src/libgame/misc.c |  9 ++++++++-
 src/libgame/misc.h |  3 ++-
 src/main.c         | 16 +++++++++++++++-
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index 2bd443a2..26c7a0e1 100644
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -1693,7 +1693,8 @@ boolean isURL(const char *s)
 
 void GetOptions(int argc, char *argv[],
 		void (*print_usage_function)(void),
-		void (*print_version_function)(void))
+		void (*print_version_function)(void),
+		void (*print_render_drivers_function)(void))
 {
   char *base_path = getProgramMainDataPath(argv[0], BASE_PATH);
   char **argvplus = checked_calloc((argc + 1) * sizeof(char **));
@@ -1910,6 +1911,12 @@ void GetOptions(int argc, char *argv[],
 
       exit(0);
     }
+    else if (strncmp(option, "-list-render-drivers", option_len) == 0)
+    {
+      print_render_drivers_function();
+
+      exit(0);
+    }
     else if (strPrefix(option, "-D"))
     {
       options.special_flags = getStringCopy(&option[2]);
diff --git a/src/libgame/misc.h b/src/libgame/misc.h
index 26a5168f..81d27d22 100644
--- a/src/libgame/misc.h
+++ b/src/libgame/misc.h
@@ -207,7 +207,8 @@ boolean isURL(const char *);
 
 void GetOptions(int, char **,
 		void (*print_usage_function)(void),
-		void (*print_version_function)(void));
+		void (*print_version_function)(void),
+		void (*print_render_drivers_function)(void));
 
 void *checked_malloc(unsigned int);
 void *checked_calloc(unsigned int);
diff --git a/src/main.c b/src/main.c
index ce506491..41257e93 100644
--- a/src/main.c
+++ b/src/main.c
@@ -9576,6 +9576,20 @@ static void print_version(void)
   }
 }
 
+static void print_render_drivers(void)
+{
+  int num_render_drivers = SDL_GetNumRenderDrivers();
+  int i;
+
+  for (i = 0; i < num_render_drivers; i++)
+  {
+    SDL_RendererInfo info;
+
+    if (SDL_GetRenderDriverInfo(i, &info) == 0)
+      Print("- SDL render driver #%d: '%s'\n", i, info.name);
+  }
+}
+
 static void InitProgramConfig(char *command_filename)
 {
   char *program_title = PROGRAM_TITLE_STRING;
@@ -9640,7 +9654,7 @@ int main(int argc, char *argv[])
   InitExitFunction(CloseAllAndExit);
   InitPlatformDependentStuff();
 
-  GetOptions(argc, argv, print_usage, print_version);
+  GetOptions(argc, argv, print_usage, print_version, print_render_drivers);
   OpenAll();
 
   EventLoop();
-- 
2.34.1