From f3a39074b0b931d87ae442ceb2fa651d3f59751a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 18 Jan 2025 08:35:54 -0500
Subject: [PATCH] windows: use WS_THICKFRAME style on borderless windows.
This is apparently necessary in newer Windows releases (Windows 10 and later?)
to allow hit-testing to resize the window.
Fixes #8406.
---
src/video/windows/SDL_windowswindow.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/video/windows/SDL_windowswindow.c b/src/video/windows/SDL_windowswindow.c
index 68e65847e62d0..ef516c19df2c6 100644
--- a/src/video/windows/SDL_windowswindow.c
+++ b/src/video/windows/SDL_windowswindow.c
@@ -147,12 +147,13 @@ static ATOM SDL_HelperWindowClass = 0;
- WS_CAPTION: this seems to enable the Windows minimize animation
- WS_SYSMENU: enables system context menu on task bar
This will also cause the task bar to overlap the window and other windowed behaviors, so only use this for windows that shouldn't appear to be fullscreen
+ - WS_THICKFRAME: allows hit-testing to resize window (doesn't actually add a frame to a borderless window).
*/
#define STYLE_BASIC (WS_CLIPSIBLINGS | WS_CLIPCHILDREN)
#define STYLE_FULLSCREEN (WS_POPUP | WS_MINIMIZEBOX)
-#define STYLE_BORDERLESS (WS_POPUP | WS_MINIMIZEBOX)
-#define STYLE_BORDERLESS_WINDOWED (WS_POPUP | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX)
+#define STYLE_BORDERLESS (WS_POPUP | WS_MINIMIZEBOX | WS_THICKFRAME)
+#define STYLE_BORDERLESS_WINDOWED (WS_POPUP | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_THICKFRAME)
#define STYLE_NORMAL (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX)
#define STYLE_RESIZABLE (WS_THICKFRAME | WS_MAXIMIZEBOX)
#define STYLE_MASK (STYLE_FULLSCREEN | STYLE_BORDERLESS | STYLE_NORMAL | STYLE_RESIZABLE)