libretro: Add option to hide OSD messages

src/duckstation-libretro/libretro_host_interface.cpp

@@ -200,6 +200,9 @@ std::string LibretroHostInterface::GetStringSettingValue(const char* section, co
 
 void LibretroHostInterface::AddOSDMessage(std::string message, float duration /*= 2.0f*/)
 {
+  if (!g_settings.display_show_osd_messages)
+    return;
+
   retro_message msg = {};
   msg.msg = message.c_str();
   msg.frames = static_cast<u32>(duration * (System::IsShutdown() ? 60.0f : System::GetThrottleFrequency()));
@@ -445,7 +448,7 @@ void LibretroHostInterface::OnSystemDestroyed()
   m_using_hardware_renderer = false;
 }
 
-static std::array<retro_core_option_definition, 36> s_option_definitions = {{
+static std::array<retro_core_option_definition, 37> s_option_definitions = {{
   {"duckstation_Console.Region",
    "Console Region",
    "Determines which region/hardware to emulate. Auto-Detect will use the region of the disc inserted.",
@@ -690,6 +693,11 @@ static std::array<retro_core_option_definition, 36> s_option_definitions = {{
    "Automatically enables analog mode in supported controllers at start/reset.",
    {{"true", "Enabled"}, {"false", "Disabled"}},
    "false"},
+  {"duckstation_Display.ShowOSDMessages",
+   "Display OSD Messages",
+   "Shows on-screen messages generated by the core.",
+   {{"true", "Enabled"}, {"false", "Disabled"}},
+   "true"},
   {"duckstation_Logging.LogLevel",
    "Log Level",
    "Sets the level of information logged by the core.",