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Fix game window to maintain resolution and be centered when going out the fullscreen on Windows

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#3699
This commit is contained in:
Wojciech Figat
2026-08-06 06:57:26 +02:00
parent e0346f506e
commit ef35bb906d
2 changed files with 27 additions and 5 deletions
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Source/Engine/Platform/Windows/WindowsWindow.cpp
+27 -3
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@@ -265,8 +265,13 @@ void WindowsWindow::SetBorderless(bool isBorderless, bool maximized)
{
ASSERT(HasHWND());
Float2 preserveSize(0, 0);
if (IsFullscreen())
{
if (_swapChain && !maximized)
preserveSize = _swapChain->GetSize();
SetIsFullscreen(false);
}
// Fixes issue of borderless window not going full screen
if (IsMaximized())
@@ -301,6 +306,16 @@ void WindowsWindow::SetBorderless(bool isBorderless, bool maximized)
{
ShowWindow(_handle, SW_SHOW);
}
// Maintain resolution when going out the fullscreen
if (preserveSize != Float2::Zero)
{
Int4 monitorBounds;
GetScreenInfo(monitorBounds.X, monitorBounds.Y, monitorBounds.Z, monitorBounds.W);
monitorBounds.X += (monitorBounds.Z - (int32)preserveSize.X) / 2;
monitorBounds.Y += (monitorBounds.W - (int32)preserveSize.Y) / 2;
SetWindowPos(_handle, nullptr, monitorBounds.X, monitorBounds.Y, (int32)preserveSize.X, (int32)preserveSize.Y, SWP_NOZORDER | SWP_NOACTIVATE);
}
}
else
{
@@ -313,13 +328,22 @@ void WindowsWindow::SetBorderless(bool isBorderless, bool maximized)
if (_settings.HasSizingFrame)
lStyle |= WS_THICKFRAME;
lStyle |= WS_OVERLAPPED | WS_SYSMENU | WS_BORDER | WS_CAPTION;
SetWindowLong(_handle, GWL_STYLE, lStyle);
const Float2 clientSize = GetClientSize();
const Float2 desktopSize = Platform::GetDesktopSize();
// Move window and half size if it is larger than desktop size
if (clientSize.X >= desktopSize.X && clientSize.Y >= desktopSize.Y)
if (preserveSize != Float2::Zero)
{
// Maintain resolution when going out the fullscreen
Int4 monitorBounds;
GetScreenInfo(monitorBounds.X, monitorBounds.Y, monitorBounds.Z, monitorBounds.W);
monitorBounds.X += (monitorBounds.Z - (int32)preserveSize.X) / 2;
monitorBounds.Y += (monitorBounds.W - (int32)preserveSize.Y) / 2;
SetWindowPos(_handle, nullptr, monitorBounds.X, monitorBounds.Y, (int32)preserveSize.X, (int32)preserveSize.Y, SWP_NOZORDER | SWP_NOACTIVATE);
}
else if (clientSize.X >= desktopSize.X && clientSize.Y >= desktopSize.Y)
{
// Move window and half size if it is larger than desktop size
const Float2 halfSize = desktopSize * 0.5f;
const Float2 middlePos = halfSize * 0.5f;
SetWindowPos(_handle, nullptr, (int)middlePos.X, (int)middlePos.Y, (int)halfSize.X, (int)halfSize.Y, SWP_FRAMECHANGED | SWP_NOZORDER | SWP_NOACTIVATE);