sdl2-compat: updated headers from latest SDL2

SDL Commits
1 
From 50a89fe919e22cb83ed8d76d6a1673b3ada6936f Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 21 Nov 2023 01:00:50 +0300
Subject: [PATCH] updated headers from latest SDL2

---
 include/SDL2/SDL_pixels.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/SDL2/SDL_pixels.h b/include/SDL2/SDL_pixels.h
index 9abd57b..d6a6129 100644
--- a/include/SDL2/SDL_pixels.h
+++ b/include/SDL2/SDL_pixels.h
@@ -276,11 +276,19 @@ typedef enum
     SDL_PIXELFORMAT_ARGB32 = SDL_PIXELFORMAT_ARGB8888,
     SDL_PIXELFORMAT_BGRA32 = SDL_PIXELFORMAT_BGRA8888,
     SDL_PIXELFORMAT_ABGR32 = SDL_PIXELFORMAT_ABGR8888,
+    SDL_PIXELFORMAT_RGBX32 = SDL_PIXELFORMAT_RGBX8888,
+    SDL_PIXELFORMAT_XRGB32 = SDL_PIXELFORMAT_XRGB8888,
+    SDL_PIXELFORMAT_BGRX32 = SDL_PIXELFORMAT_BGRX8888,
+    SDL_PIXELFORMAT_XBGR32 = SDL_PIXELFORMAT_XBGR8888,
 #else
     SDL_PIXELFORMAT_RGBA32 = SDL_PIXELFORMAT_ABGR8888,
     SDL_PIXELFORMAT_ARGB32 = SDL_PIXELFORMAT_BGRA8888,
     SDL_PIXELFORMAT_BGRA32 = SDL_PIXELFORMAT_ARGB8888,
     SDL_PIXELFORMAT_ABGR32 = SDL_PIXELFORMAT_RGBA8888,
+    SDL_PIXELFORMAT_RGBX32 = SDL_PIXELFORMAT_XBGR8888,
+    SDL_PIXELFORMAT_XRGB32 = SDL_PIXELFORMAT_BGRX8888,
+    SDL_PIXELFORMAT_BGRX32 = SDL_PIXELFORMAT_XRGB8888,
+    SDL_PIXELFORMAT_XBGR32 = SDL_PIXELFORMAT_RGBX8888,
 #endif
 
     SDL_PIXELFORMAT_YV12 =      /**< Planar mode: Y + V + U  (3 planes) */