SDL: Re-added the internal hint SDL_BORDERLESS_WINDOWED_STYLE

From 20a4e31a12ea2f7f472dcf3d57baff315ae2b81b Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Tue, 7 Feb 2023 09:47:17 -0800
Subject: [PATCH] Re-added the internal hint SDL_BORDERLESS_WINDOWED_STYLE

sdl2-compat should set this to "0"
---
 src/video/windows/SDL_windowswindow.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/video/windows/SDL_windowswindow.c b/src/video/windows/SDL_windowswindow.c
index 5a8458790631..24230b3bbb20 100644
--- a/src/video/windows/SDL_windowswindow.c
+++ b/src/video/windows/SDL_windowswindow.c
@@ -77,7 +77,15 @@ static DWORD GetWindowStyle(SDL_Window *window)
         style |= STYLE_FULLSCREEN;
     } else {
         if (window->flags & SDL_WINDOW_BORDERLESS) {
-            style |= STYLE_BORDERLESS_WINDOWED;
+            /* This behavior more closely matches other platform where the window is borderless
+               but still interacts with the window manager (e.g. task bar shows above it, it can
+               be resized to fit within usable desktop area, etc.)
+             */
+            if (SDL_GetHintBoolean("SDL_BORDERLESS_WINDOWED_STYLE", SDL_TRUE)) {
+                style |= STYLE_BORDERLESS_WINDOWED;
+            } else {
+                style |= STYLE_BORDERLESS;
+            }
         } else {
             style |= STYLE_NORMAL;
         }