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win32: Use STYLE_BORDERLESS when showing a pending fullscreen window

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In addition to hiding the border on bordered windows that will immediately become fullscreen, The combination of flags used in STYLE_BORDERLESS_WINDOWED will still show the borders on borderless windows if the initial window size exactly matches the desktop, so STYLE_BORDERLESS must be used instead.

(cherry picked from commit 90a023007f)
This commit is contained in:
Frank Praznik
2025-08-05 15:51:50 -04:00
parent 688637eca8
commit 1a2841deb1
1 changed files with 9 additions and 9 deletions
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18
src/video/windows/SDL_windowswindow.c
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@@ -1043,16 +1043,16 @@ void WIN_ShowWindow(SDL_VideoDevice *_this, SDL_Window *window)
WIN_SetWindowPosition(_this, window);
}
// If the window isn't borderless and will be fullscreen, use the borderless style to hide the initial borders.
/* If the window will immediately become fullscreen, use the borderless style to hide the initial borders.
*
* Note: The combination of flags used in STYLE_BORDERLESS_WINDOWED will still briefly show the borders if
* the initial window size exactly matches the desktop, so STYLE_BORDERLESS must be used instead.
*/
if (window->pending_flags & SDL_WINDOW_FULLSCREEN) {
if (!(window->flags & SDL_WINDOW_BORDERLESS)) {
window->flags |= SDL_WINDOW_BORDERLESS;
style = GetWindowLong(hwnd, GWL_STYLE);
style &= ~STYLE_MASK;
style |= GetWindowStyle(window);
SetWindowLong(hwnd, GWL_STYLE, style);
window->flags &= ~SDL_WINDOW_BORDERLESS;
}
style = GetWindowLong(hwnd, GWL_STYLE);
style &= ~STYLE_MASK;
style |= STYLE_BORDERLESS;
SetWindowLong(hwnd, GWL_STYLE, style);
}
style = GetWindowLong(hwnd, GWL_EXSTYLE);
if (style & WS_EX_NOACTIVATE) {