libs/SDL2/include/SDL_test_harness.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_test_images.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_test_log.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_test_md5.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_test_memory.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_test_random.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_thread.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -35,7 +35,7 @@
 #include "SDL_atomic.h"
 #include "SDL_mutex.h"
 
-#if defined(__WIN32__)
+#if (defined(__WIN32__) || defined(__GDK__)) && !defined(__WINRT__)
 #include <process.h> /* _beginthreadex() and _endthreadex() */
 #endif
 #if defined(__OS2__) /* for _beginthread() and _endthread() */
@@ -88,7 +88,7 @@ typedef enum {
 typedef int (SDLCALL * SDL_ThreadFunction) (void *data);
 
 
-#if defined(__WIN32__)
+#if (defined(__WIN32__) || defined(__GDK__)) && !defined(__WINRT__)
 /**
  *  \file SDL_thread.h
  *
@@ -129,7 +129,7 @@ SDL_CreateThread(SDL_ThreadFunction fn, const char *name, void *data,
                  pfnSDL_CurrentEndThread pfnEndThread);
 
 extern DECLSPEC SDL_Thread *SDLCALL
-SDL_CreateThreadWithStackSize(int (SDLCALL * fn) (void *),
+SDL_CreateThreadWithStackSize(SDL_ThreadFunction fn,
                  const char *name, const size_t stacksize, void *data,
                  pfnSDL_CurrentBeginThread pfnBeginThread,
                  pfnSDL_CurrentEndThread pfnEndThread);
@@ -142,7 +142,7 @@ SDL_CreateThreadWithStackSize(int (SDLCALL * fn) (void *),
 #define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize_REAL(fn, name, stacksize, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
 #else
 #define SDL_CreateThread(fn, name, data) SDL_CreateThread(fn, name, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
-#define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize(fn, name, data, (pfnSDL_CurrentBeginThread)_beginthreadex, (pfnSDL_CurrentEndThread)SDL_endthread)
+#define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize(fn, name, stacksize, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
 #endif
 
 #elif defined(__OS2__)
@@ -175,7 +175,7 @@ SDL_CreateThreadWithStackSize(SDL_ThreadFunction fn, const char *name, const siz
 #undef SDL_CreateThread
 #define SDL_CreateThread(fn, name, data) SDL_CreateThread_REAL(fn, name, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
 #undef SDL_CreateThreadWithStackSize
-#define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize_REAL(fn, name, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
+#define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize_REAL(fn, name, stacksize, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
 #else
 #define SDL_CreateThread(fn, name, data) SDL_CreateThread(fn, name, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)
 #define SDL_CreateThreadWithStackSize(fn, name, stacksize, data) SDL_CreateThreadWithStackSize(fn, name, stacksize, data, (pfnSDL_CurrentBeginThread)SDL_beginthread, (pfnSDL_CurrentEndThread)SDL_endthread)

libs/SDL2/include/SDL_timer.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_touch.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -95,6 +95,14 @@ extern DECLSPEC int SDLCALL SDL_GetNumTouchDevices(void);
  */
 extern DECLSPEC SDL_TouchID SDLCALL SDL_GetTouchDevice(int index);
 
+/**
+ * Get the touch device name as reported from the driver or NULL if the index
+ * is invalid.
+ *
+ * \since This function is available since SDL 2.0.22.
+ */
+extern DECLSPEC const char* SDLCALL SDL_GetTouchName(int index);
+
 /**
  * Get the type of the given touch device.
  *

libs/SDL2/include/SDL_types.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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

libs/SDL2/include/SDL_version.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -58,8 +58,8 @@ typedef struct SDL_version
 /* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL
 */
 #define SDL_MAJOR_VERSION   2
-#define SDL_MINOR_VERSION   0
-#define SDL_PATCHLEVEL      20
+#define SDL_MINOR_VERSION   28
+#define SDL_PATCHLEVEL      5
 
 /**
  * Macro to determine SDL version program was compiled against.
@@ -83,6 +83,8 @@ typedef struct SDL_version
     (x)->patch = SDL_PATCHLEVEL;                    \
 }
 
+/* TODO: Remove this whole block in SDL 3 */
+#if SDL_MAJOR_VERSION < 3
 /**
  *  This macro turns the version numbers into a numeric value:
  *  \verbatim
@@ -90,21 +92,35 @@ typedef struct SDL_version
     \endverbatim
  *
  *  This assumes that there will never be more than 100 patchlevels.
+ *
+ *  In versions higher than 2.9.0, the minor version overflows into
+ *  the thousands digit: for example, 2.23.0 is encoded as 4300,
+ *  and 2.255.99 would be encoded as 25799.
+ *  This macro will not be available in SDL 3.x.
  */
 #define SDL_VERSIONNUM(X, Y, Z)                     \
     ((X)*1000 + (Y)*100 + (Z))
 
 /**
  *  This is the version number macro for the current SDL version.
+ *
+ *  In versions higher than 2.9.0, the minor version overflows into
+ *  the thousands digit: for example, 2.23.0 is encoded as 4300.
+ *  This macro will not be available in SDL 3.x.
+ *
+ *  Deprecated, use SDL_VERSION_ATLEAST or SDL_VERSION instead.
  */
 #define SDL_COMPILEDVERSION \
     SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL)
+#endif /* SDL_MAJOR_VERSION < 3 */
 
 /**
  *  This macro will evaluate to true if compiled with SDL at least X.Y.Z.
  */
 #define SDL_VERSION_ATLEAST(X, Y, Z) \
-    (SDL_COMPILEDVERSION >= SDL_VERSIONNUM(X, Y, Z))
+    ((SDL_MAJOR_VERSION >= X) && \
+     (SDL_MAJOR_VERSION > X || SDL_MINOR_VERSION >= Y) && \
+     (SDL_MAJOR_VERSION > X || SDL_MINOR_VERSION > Y || SDL_PATCHLEVEL >= Z))
 
 /**
  * Get the version of SDL that is linked against your program.

libs/SDL2/include/SDL_video.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -187,7 +187,8 @@ typedef enum
     SDL_DISPLAYEVENT_NONE,          /**< Never used */
     SDL_DISPLAYEVENT_ORIENTATION,   /**< Display orientation has changed to data1 */
     SDL_DISPLAYEVENT_CONNECTED,     /**< Display has been added to the system */
-    SDL_DISPLAYEVENT_DISCONNECTED   /**< Display has been removed from the system */
+    SDL_DISPLAYEVENT_DISCONNECTED,  /**< Display has been removed from the system */
+    SDL_DISPLAYEVENT_MOVED          /**< Display has changed position */
 } SDL_DisplayEventID;
 
 /**
@@ -248,7 +249,8 @@ typedef enum
     SDL_GL_FRAMEBUFFER_SRGB_CAPABLE,
     SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
     SDL_GL_CONTEXT_RESET_NOTIFICATION,
-    SDL_GL_CONTEXT_NO_ERROR
+    SDL_GL_CONTEXT_NO_ERROR,
+    SDL_GL_FLOATBUFFERS
 } SDL_GLattr;
 
 typedef enum
@@ -444,6 +446,15 @@ extern DECLSPEC int SDLCALL SDL_GetDisplayUsableBounds(int displayIndex, SDL_Rec
  * A failure of this function usually means that either no DPI information is
  * available or the `displayIndex` is out of range.
  *
+ * **WARNING**: This reports the DPI that the hardware reports, and it is not
+ * always reliable! It is almost always better to use SDL_GetWindowSize() to
+ * find the window size, which might be in logical points instead of pixels,
+ * and then SDL_GL_GetDrawableSize(), SDL_Vulkan_GetDrawableSize(),
+ * SDL_Metal_GetDrawableSize(), or SDL_GetRendererOutputSize(), and compare
+ * the two values to get an actual scaling value between the two. We will be
+ * rethinking how high-dpi details should be managed in SDL3 to make things
+ * more consistent, reliable, and clear.
+ *
  * \param displayIndex the index of the display from which DPI information
  *                     should be queried
  * \param ddpi a pointer filled in with the diagonal DPI of the display; may
@@ -587,6 +598,35 @@ extern DECLSPEC int SDLCALL SDL_GetCurrentDisplayMode(int displayIndex, SDL_Disp
  */
 extern DECLSPEC SDL_DisplayMode * SDLCALL SDL_GetClosestDisplayMode(int displayIndex, const SDL_DisplayMode * mode, SDL_DisplayMode * closest);
 
+/**
+ * Get the index of the display containing a point
+ *
+ * \param point the point to query
+ * \returns the index of the display containing the point or a negative error
+ *          code on failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.24.0.
+ *
+ * \sa SDL_GetDisplayBounds
+ * \sa SDL_GetNumVideoDisplays
+ */
+extern DECLSPEC int SDLCALL SDL_GetPointDisplayIndex(const SDL_Point * point);
+
+/**
+ * Get the index of the display primarily containing a rect
+ *
+ * \param rect the rect to query
+ * \returns the index of the display entirely containing the rect or closest
+ *          to the center of the rect on success or a negative error code on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.24.0.
+ *
+ * \sa SDL_GetDisplayBounds
+ * \sa SDL_GetNumVideoDisplays
+ */
+extern DECLSPEC int SDLCALL SDL_GetRectDisplayIndex(const SDL_Rect * rect);
+
 /**
  * Get the index of the display associated with a window.
  *
@@ -697,7 +737,10 @@ extern DECLSPEC Uint32 SDLCALL SDL_GetWindowPixelFormat(SDL_Window * window);
  * in pixels may differ from its size in screen coordinates on platforms with
  * high-DPI support (e.g. iOS and macOS). Use SDL_GetWindowSize() to query the
  * client area's size in screen coordinates, and SDL_GL_GetDrawableSize() or
- * SDL_GetRendererOutputSize() to query the drawable size in pixels.
+ * SDL_GetRendererOutputSize() to query the drawable size in pixels. Note that
+ * when this flag is set, the drawable size can vary after the window is
+ * created and should be queried after major window events such as when the
+ * window is resized or moved between displays.
  *
  * If the window is set fullscreen, the width and height parameters `w` and
  * `h` will not be used. However, invalid size parameters (e.g. too large) may
@@ -1004,6 +1047,27 @@ extern DECLSPEC int SDLCALL SDL_GetWindowBordersSize(SDL_Window * window,
                                                      int *top, int *left,
                                                      int *bottom, int *right);
 
+/**
+ * Get the size of a window in pixels.
+ *
+ * This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI
+ * drawable, i.e. the window was created with `SDL_WINDOW_ALLOW_HIGHDPI` on a
+ * platform with high-DPI support (Apple calls this "Retina"), and not
+ * disabled by the `SDL_HINT_VIDEO_HIGHDPI_DISABLED` hint.
+ *
+ * \param window the window from which the drawable size should be queried
+ * \param w a pointer to variable for storing the width in pixels, may be NULL
+ * \param h a pointer to variable for storing the height in pixels, may be
+ *          NULL
+ *
+ * \since This function is available since SDL 2.26.0.
+ *
+ * \sa SDL_CreateWindow
+ * \sa SDL_GetWindowSize
+ */
+extern DECLSPEC void SDLCALL SDL_GetWindowSizeInPixels(SDL_Window * window,
+                                                       int *w, int *h);
+
 /**
  * Set the minimum size of a window's client area.
  *
@@ -1211,6 +1275,17 @@ extern DECLSPEC void SDLCALL SDL_RestoreWindow(SDL_Window * window);
 extern DECLSPEC int SDLCALL SDL_SetWindowFullscreen(SDL_Window * window,
                                                     Uint32 flags);
 
+/**
+ * Return whether the window has a surface associated with it.
+ *
+ * \returns SDL_TRUE if there is a surface associated with the window, or SDL_FALSE otherwise.
+ *
+ * \since This function is available since SDL 2.28.0.
+ *
+ * \sa SDL_GetWindowSurface
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasWindowSurface(SDL_Window *window);
+
 /**
  * Get the SDL surface associated with the window.
  *
@@ -1231,6 +1306,8 @@ extern DECLSPEC int SDLCALL SDL_SetWindowFullscreen(SDL_Window * window,
  *
  * \since This function is available since SDL 2.0.0.
  *
+ * \sa SDL_DestroyWindowSurface
+ * \sa SDL_HasWindowSurface
  * \sa SDL_UpdateWindowSurface
  * \sa SDL_UpdateWindowSurfaceRects
  */
@@ -1265,7 +1342,7 @@ extern DECLSPEC int SDLCALL SDL_UpdateWindowSurface(SDL_Window * window);
  *
  * \param window the window to update
  * \param rects an array of SDL_Rect structures representing areas of the
- *              surface to copy
+ *              surface to copy, in pixels
  * \param numrects the number of rectangles
  * \returns 0 on success or a negative error code on failure; call
  *          SDL_GetError() for more information.
@@ -1279,6 +1356,20 @@ extern DECLSPEC int SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window * window,
                                                          const SDL_Rect * rects,
                                                          int numrects);
 
+/**
+ * Destroy the surface associated with the window.
+ *
+ * \param window the window to update
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.28.0.
+ *
+ * \sa SDL_GetWindowSurface
+ * \sa SDL_HasWindowSurface
+ */
+extern DECLSPEC int SDLCALL SDL_DestroyWindowSurface(SDL_Window *window);
+
 /**
  * Set a window's input grab mode.
  *
@@ -1337,6 +1428,7 @@ extern DECLSPEC void SDLCALL SDL_SetWindowKeyboardGrab(SDL_Window * window,
  * Mouse grab confines the mouse cursor to the window.
  *
  * \param window The window for which the mouse grab mode should be set.
+ * \param grabbed This is SDL_TRUE to grab mouse, and SDL_FALSE to release.
  *
  * \since This function is available since SDL 2.0.16.
  *
@@ -1747,6 +1839,9 @@ extern DECLSPEC void SDLCALL SDL_EnableScreenSaver(void);
  * If you disable the screensaver, it is automatically re-enabled when SDL
  * quits.
  *
+ * The screensaver is disabled by default since SDL 2.0.2. Before SDL 2.0.2
+ * the screensaver was enabled by default.
+ *
  * \since This function is available since SDL 2.0.0.
  *
  * \sa SDL_EnableScreenSaver
@@ -2008,13 +2103,8 @@ extern DECLSPEC void SDLCALL SDL_GL_GetDrawableSize(SDL_Window * window, int *w,
  * retry the call with 1 for the interval.
  *
  * Adaptive vsync is implemented for some glX drivers with
- * GLX_EXT_swap_control_tear:
- *
- * https://www.opengl.org/registry/specs/EXT/glx_swap_control_tear.txt
- *
- * and for some Windows drivers with WGL_EXT_swap_control_tear:
- *
- * https://www.opengl.org/registry/specs/EXT/wgl_swap_control_tear.txt
+ * GLX_EXT_swap_control_tear, and for some Windows drivers with
+ * WGL_EXT_swap_control_tear.
  *
  * Read more on the Khronos wiki:
  * https://www.khronos.org/opengl/wiki/Swap_Interval#Adaptive_Vsync

libs/SDL2/include/begin_code.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -28,13 +28,13 @@
  */
 
 /* This shouldn't be nested -- included it around code only. */
-#ifdef _begin_code_h
+#ifdef SDL_begin_code_h
 #error Nested inclusion of begin_code.h
 #endif
-#define _begin_code_h
+#define SDL_begin_code_h
 
 #ifndef SDL_DEPRECATED
-#  if (__GNUC__ >= 4)  /* technically, this arrived in gcc 3.1, but oh well. */
+#  if defined(__GNUC__) && (__GNUC__ >= 4)  /* technically, this arrived in gcc 3.1, but oh well. */
 #    define SDL_DEPRECATED __attribute__((deprecated))
 #  else
 #    define SDL_DEPRECATED
@@ -51,7 +51,7 @@
 
 /* Some compilers use a special export keyword */
 #ifndef DECLSPEC
-# if defined(__WIN32__) || defined(__WINRT__) || defined(__CYGWIN__)
+# if defined(__WIN32__) || defined(__WINRT__) || defined(__CYGWIN__) || defined(__GDK__)
 #  ifdef DLL_EXPORT
 #   define DECLSPEC __declspec(dllexport)
 #  else
@@ -74,7 +74,7 @@
 
 /* By default SDL uses the C calling convention */
 #ifndef SDLCALL
-#if (defined(__WIN32__) || defined(__WINRT__)) && !defined(__GNUC__)
+#if (defined(__WIN32__) || defined(__WINRT__) || defined(__GDK__)) && !defined(__GNUC__)
 #define SDLCALL __cdecl
 #elif defined(__OS2__) || defined(__EMX__)
 #define SDLCALL _System
@@ -107,7 +107,7 @@
 #ifdef __BORLANDC__
 #pragma nopackwarning
 #endif
-#ifdef _M_X64
+#ifdef _WIN64
 /* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */
 #pragma pack(push,8)
 #else
@@ -171,17 +171,17 @@
 #define SDL_FALLTHROUGH [[fallthrough]]
 #else
 #if defined(__has_attribute)
-#define _HAS_FALLTHROUGH __has_attribute(__fallthrough__)
+#define SDL_HAS_FALLTHROUGH __has_attribute(__fallthrough__)
 #else
-#define _HAS_FALLTHROUGH 0
+#define SDL_HAS_FALLTHROUGH 0
 #endif /* __has_attribute */
-#if _HAS_FALLTHROUGH && \
+#if SDL_HAS_FALLTHROUGH && \
    ((defined(__GNUC__) && __GNUC__ >= 7) || \
     (defined(__clang_major__) && __clang_major__ >= 10))
 #define SDL_FALLTHROUGH __attribute__((__fallthrough__))
 #else
 #define SDL_FALLTHROUGH do {} while (0) /* fallthrough */
-#endif /* _HAS_FALLTHROUGH */
-#undef _HAS_FALLTHROUGH
+#endif /* SDL_HAS_FALLTHROUGH */
+#undef SDL_HAS_FALLTHROUGH
 #endif /* C++17 or C2x */
 #endif /* SDL_FALLTHROUGH not defined */

libs/SDL2/include/close_code.h

 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 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
@@ -26,10 +26,10 @@
  *  after you finish any function and structure declarations in your headers
  */
 
-#ifndef _begin_code_h
+#ifndef SDL_begin_code_h
 #error close_code.h included without matching begin_code.h
 #endif
-#undef _begin_code_h
+#undef SDL_begin_code_h
 
 /* Reset structure packing at previous byte alignment */
 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)