Update SDL2 to latest source (1a50334)

libs/SDL2/include/SDL_hints.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -1059,6 +1059,19 @@ extern "C" {
  */
 #define SDL_HINT_RENDER_BATCHING  "SDL_RENDER_BATCHING"
 
+/**
+ *  \brief  A variable controlling how the 2D render API renders lines
+ *
+ *  This variable can be set to the following values:
+ *    "0"     - Use the default line drawing method (Bresenham's line algorithm as of SDL 2.0.20)
+ *    "1"     - Use the driver point API using Bresenham's line algorithm (correct, draws many points)
+ *    "2"     - Use the driver line API (occasionally misses line endpoints based on hardware driver quirks, was the default before 2.0.20)
+ *    "3"     - Use the driver geometry API (correct, draws thicker diagonal lines)
+ *
+ *  This variable should be set when the renderer is created.
+ */
+#define SDL_HINT_RENDER_LINE_METHOD "SDL_RENDER_LINE_METHOD"
+
 /**
  *  \brief  A variable controlling whether to enable Direct3D 11+'s Debug Layer.
  *
@@ -1811,6 +1824,27 @@ extern "C" {
  */
 #define SDL_HINT_AUDIO_INCLUDE_MONITORS "SDL_AUDIO_INCLUDE_MONITORS"
 
+/**
+ *  \brief  A variable that forces X11 windows to create as a custom type.
+ *
+ *  This is currently only used for X11 and ignored elsewhere.
+ *
+ *  During SDL_CreateWindow, SDL uses the _NET_WM_WINDOW_TYPE X11 property
+ *  to report to the window manager the type of window it wants to create.
+ *  This might be set to various things if SDL_WINDOW_TOOLTIP or
+ *  SDL_WINDOW_POPUP_MENU, etc, were specified. For "normal" windows that
+ *  haven't set a specific type, this hint can be used to specify a custom
+ *  type. For example, a dock window might set this to
+ *  "_NET_WM_WINDOW_TYPE_DOCK".
+ *
+ *  If not set or set to "", this hint is ignored. This hint must be set
+ *  before the SDL_CreateWindow() call that it is intended to affect.
+ *
+ *  This hint is available since SDL 2.0.22. Before then, virtual devices are
+ *  always ignored.
+ */
+#define SDL_HINT_X11_WINDOW_TYPE "SDL_X11_WINDOW_TYPE"
+
 
 /**
  *  \brief  An enumeration of hint priorities