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Add ClydeWindow API to set borderless mode #6618

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3e4c89e
Borderless windows
PowerfulBacon Jun 5, 2026
565d0d4
Apply suggestion from @PowerfulBacon
PowerfulBacon Jun 6, 2026
81bb5d4
Adds in a release note
PowerfulBacon Jun 9, 2026
28819ca
titlebar => bordered
PowerfulBacon Jun 9, 2026
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2 changes: 1 addition & 1 deletion RELEASE-NOTES.md
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Expand Up @@ -39,7 +39,7 @@ END TEMPLATE-->

### New features

*None yet*
* Added the ability to set Clyde windows to borderless mode.

### Bugfixes

Expand Down
33 changes: 24 additions & 9 deletions Robust.Client/Graphics/Clyde/Clyde.Windowing.cs
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Original file line number Diff line number Diff line change
@@ -1,10 +1,3 @@
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Numerics;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using Robust.Client.Input;
using Robust.Client.UserInterface;
using Robust.Shared;
Expand All @@ -14,13 +7,19 @@
using Robust.Shared.Utility;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Numerics;
using System.Threading;
using System.Threading.Tasks;
using TerraFX.Interop.Windows;
using FrameEventArgs = Robust.Shared.Timing.FrameEventArgs;
using GL = OpenToolkit.Graphics.OpenGL4.GL;

namespace Robust.Client.Graphics.Clyde
{
internal partial class Clyde
internal partial class Clyde
{
private readonly List<WindowReg> _windows = new();
private readonly List<WindowHandle> _windowHandles = new();
Expand Down Expand Up @@ -282,6 +281,13 @@ public void SetWindowTitle(string title)
_windowing!.WindowSetTitle(_mainWindow!, title);
}

private void SetWindowTitleBarVisible(WindowReg reg, bool visible)
{
DebugTools.AssertNotNull(_windowing);

_windowing!.WindowSetTitleBarVisible(reg, visible);
}

public void SetWindowMonitor(IClydeMonitor monitor)
{
DebugTools.AssertNotNull(_windowing);
Expand Down Expand Up @@ -342,6 +348,7 @@ public IClydeWindow CreateWindow(WindowCreateParameters parameters)
_mainWindow = reg;

reg.IsVisible = parameters.Visible;
reg.IsTitleBarVisible = parameters.TitleBarVisible;

_windows.Add(reg);
_windowHandles.Add(reg.Handle);
Expand Down Expand Up @@ -415,7 +422,7 @@ public bool VsyncEnabled

private void WindowModeChanged(int mode)
{
_windowMode = (WindowMode) mode;
_windowMode = (WindowMode)mode;
_windowing?.UpdateMainWindowMode();
}

Expand Down Expand Up @@ -495,6 +502,7 @@ private abstract class WindowReg
public bool IsMinimized;
public string Title = "";
public bool IsVisible;
public bool IsTitleBarVisible;
public IClydeWindow? Owner;

public bool DisposeOnClose;
Expand Down Expand Up @@ -554,6 +562,12 @@ public bool IsVisible
set => _clyde.SetWindowVisible(Reg, value);
}

public bool IsTitleBarVisible
{
get => Reg.IsTitleBarVisible;
set => _clyde.SetWindowTitleBarVisible(Reg, value);
}

public Vector2 ContentScale => Reg.WindowScale;

public bool DisposeOnClose
Expand Down Expand Up @@ -607,6 +621,7 @@ public void SetWindowProgress(WindowProgressState state, float value)
}

public nint? WindowsHWnd => _clyde._windowing!.WindowGetWin32Window(Reg);

}

private sealed class MonitorHandle : IClydeMonitor
Expand Down
20 changes: 12 additions & 8 deletions Robust.Client/Graphics/Clyde/ClydeHeadless.cs
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Original file line number Diff line number Diff line change
@@ -1,10 +1,4 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Numerics;
using System.Threading.Tasks;
using JetBrains.Annotations;
using Robust.Client.Audio;
using Robust.Client.Input;
using Robust.Client.ResourceManagement;
using Robust.Client.UserInterface;
Expand All @@ -16,6 +10,11 @@
using Robust.Shared.Timing;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using System;
using System.Collections.Generic;
using System.IO;
using System.Numerics;
using System.Threading.Tasks;
using Color = Robust.Shared.Maths.Color;

namespace Robust.Client.Graphics.Clyde
Expand Down Expand Up @@ -47,7 +46,7 @@ public ClydeHeadless()
SixLabors.ImageSharp.Configuration.Default.PreferContiguousImageBuffers = true;

var mainRt = new DummyRenderWindow(this);
var window = new DummyWindow(mainRt) {Id = new WindowId(1)};
var window = new DummyWindow(mainRt) { Id = new WindowId(1) };

_windows.Add(window);
MainWindow = window;
Expand Down Expand Up @@ -111,6 +110,10 @@ public void SetWindowTitle(string title)
// Nada.
}

public void SetWindowTitleBarVisible(bool visible)
{
}

public void SetWindowMonitor(IClydeMonitor monitor)
{
// Nada.
Expand Down Expand Up @@ -283,7 +286,7 @@ public void TextInputStop()
// Nada.
}

public ClydeHandle LoadShader(ParsedShader shader, string? name = null, Dictionary<string,string>? defines = null)
public ClydeHandle LoadShader(ParsedShader shader, string? name = null, Dictionary<string, string>? defines = null)
{
return default;
}
Expand Down Expand Up @@ -579,6 +582,7 @@ public DummyWindow(IRenderTarget renderTarget)
public bool IsFocused => false;
public bool IsMinimized => false;
public bool IsVisible { get; set; } = true;
public bool IsTitleBarVisible { get; set; } = true;
public Vector2 ContentScale => Vector2.One;
public bool DisposeOnClose { get; set; }
public event Action<WindowRequestClosedEventArgs>? RequestClosed { add { } remove { } }
Expand Down
5 changes: 3 additions & 2 deletions Robust.Client/Graphics/Clyde/Windowing/IWindowingImpl.cs
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Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@
using System;
using System.Threading.Tasks;
using Robust.Client.Input;
using Robust.Shared.Maths;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using System;
using System.Threading.Tasks;

namespace Robust.Client.Graphics.Clyde
{
Expand Down Expand Up @@ -38,6 +38,7 @@ private interface IWindowingImpl

void WindowDestroy(WindowReg reg);
void WindowSetTitle(WindowReg window, string title);
void WindowSetTitleBarVisible(WindowReg window, bool visible);
void WindowSetMonitor(WindowReg window, IClydeMonitor monitor);
void WindowSetSize(WindowReg window, Vector2i size);
void WindowSetVisible(WindowReg window, bool visible);
Expand Down
36 changes: 26 additions & 10 deletions Robust.Client/Graphics/Clyde/Windowing/Sdl3.Window.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
using System;
using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
Expand Down Expand Up @@ -265,14 +265,14 @@ private void WinThreadWinDestroy(CmdWinDestroy cmd)
switch (_videoDriver)
{
case SdlVideoDriver.Windows:
{
var hWnd = SDL.SDL_GetPointerProperty(
props,
SDL.SDL_PROP_WINDOW_WIN32_HWND_POINTER,
0);
WsiShared.SetWindowStyleNoTitleOptionsWindows((HWND)hWnd);
break;
}
{
var hWnd = SDL.SDL_GetPointerProperty(
props,
SDL.SDL_PROP_WINDOW_WIN32_HWND_POINTER,
0);
WsiShared.SetWindowStyleNoTitleOptionsWindows((HWND)hWnd);
break;
}
case SdlVideoDriver.X11:
unsafe
{
Expand Down Expand Up @@ -415,9 +415,25 @@ public void WindowSetTitle(WindowReg window, string title)
});
}


private static void WinThreadWinSetTitle(CmdWinSetTitle cmd)
{
SDL.SDL_SetWindowTitle(cmd.Window, cmd.Title);
SDL.SDL_SetWindowTitle(cmd.Window, cmd.Title);
}

public void WindowSetTitleBarVisible(WindowReg window, bool visible)
{
window.IsTitleBarVisible = visible;
SendCmd(new CmdWinSetTitleBarVisible
{
Window = WinPtr(window),
Visible = visible,
});
}

private static void WinThreadWinSetTitleBarVisible(CmdWinSetTitleBarVisible cmd)
{
SDL.SDL_SetWindowBordered(cmd.Window, cmd.Visible);
}

public void WindowSetMonitor(WindowReg window, IClydeMonitor monitor)
Expand Down
18 changes: 14 additions & 4 deletions Robust.Client/Graphics/Clyde/Windowing/Sdl3.WindowThread.cs
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
using System;
using System.Runtime.CompilerServices;
using System.Threading.Channels;
using System.Threading.Tasks;
using Robust.Shared;
using Robust.Shared.Maths;
using SDL3;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using System;
using System.Runtime.CompilerServices;
using System.Threading.Channels;
using System.Threading.Tasks;

namespace Robust.Client.Graphics.Clyde;

Expand Down Expand Up @@ -81,6 +81,10 @@ private void ProcessSdl3Cmd(CmdBase cmdb)
WinThreadWinSetTitle(cmd);
break;

case CmdWinSetTitleBarVisible cmd:
WinThreadWinSetTitleBarVisible(cmd);
break;

case CmdSetClipboard cmd:
WinThreadSetClipboard(cmd);
break;
Expand Down Expand Up @@ -291,6 +295,12 @@ private sealed class CmdWinSetTitle : CmdBase
public required string Title;
}

private sealed class CmdWinSetTitleBarVisible : CmdBase
{
public nint Window;
public required bool Visible;
}

private sealed class CmdCursorCreate : CmdBase
{
public required Image<Rgba32> Bytes;
Expand Down
5 changes: 3 additions & 2 deletions Robust.Client/Graphics/IClydeWindow.cs
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
using System;
using System.Numerics;
using Robust.Shared.Map;
using Robust.Shared.Maths;
using SDL3;
using System;
using System.Numerics;

namespace Robust.Client.Graphics
{
Expand All @@ -20,6 +20,7 @@ public interface IClydeWindow : IDisposable
bool IsFocused { get; }
bool IsMinimized { get; }
bool IsVisible { get; set; }
bool IsTitleBarVisible { get; set; }

@PJB3005 PJB3005 Jun 9, 2026

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This probably shouldn't be named this given it changes more than the title bar?

@PowerfulBacon PowerfulBacon Jun 9, 2026

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Thanks for the review, I'll update the names of everything to be centered around the 'border' rather than the 'title bar' since thats how SDL names it.

@PowerfulBacon PowerfulBacon Jun 9, 2026

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I have updated it to be IsBordered rather than IsTitleBarVisible, as that's the naming convention that SDL uses

Vector2 ContentScale { get; }

/// <summary>
Expand Down
1 change: 1 addition & 0 deletions Robust.Client/Graphics/WindowCreateParameters.cs
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Expand Up @@ -9,6 +9,7 @@ public sealed class WindowCreateParameters
public string Title = "";
public bool Maximized;
public bool Visible = true;
public bool TitleBarVisible = true;
public IClydeMonitor? Monitor;
public bool Fullscreen;

Expand Down
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