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[Windows] Check if transparency is enabled in the project setting before applying DWM blur. #95009

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merged 1 commit into from
Aug 6, 2024
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[Windows] Check if transparency is enabled in the project setting before applying DWM blur. #95009

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55 changes: 29 additions & 26 deletions platform/windows/display_server_windows.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1333,13 +1333,15 @@ DisplayServer::WindowID DisplayServerWindows::create_sub_window(WindowMode p_mod
wd.is_popup = true;
}
if (p_flags & WINDOW_FLAG_TRANSPARENT_BIT) {
DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = TRUE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);
if (OS::get_singleton()->is_layered_allowed()) {
DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = TRUE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);
}

wd.layered_window = true;
}
Expand Down Expand Up @@ -2119,28 +2121,29 @@ void DisplayServerWindows::window_set_flag(WindowFlags p_flag, bool p_enabled, W
} break;
case WINDOW_FLAG_TRANSPARENT: {
if (p_enabled) {
//enable per-pixel alpha

DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = TRUE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);

// Enable per-pixel alpha.
if (OS::get_singleton()->is_layered_allowed()) {
DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = TRUE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);
}
wd.layered_window = true;
} else {
//disable per-pixel alpha
// Disable per-pixel alpha.
wd.layered_window = false;

DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = FALSE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);
if (OS::get_singleton()->is_layered_allowed()) {
DWM_BLURBEHIND bb;
ZeroMemory(&bb, sizeof(bb));
HRGN hRgn = CreateRectRgn(0, 0, -1, -1);
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = hRgn;
bb.fEnable = FALSE;
DwmEnableBlurBehindWindow(wd.hWnd, &bb);
}
}
} break;
case WINDOW_FLAG_NO_FOCUS: {
Expand Down
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