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Add GPU-less Avalonia rendering fallback
Detect Windows hosts without a hardware GPU and configure Avalonia to use software rendering with reduced motion. Add a settings toggle to opt out of the automatic fallback.\n\nCo-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
1 parent f801a20 commit 7b7f9de

7 files changed

Lines changed: 232 additions & 3 deletions

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‎src/Languages/lang_en.json‎

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@@ -471,6 +471,8 @@
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"System language": "System language",
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"Is your language missing or incomplete?": "Is your language missing or incomplete?",
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"Appearance": "Appearance",
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"Rendering": "Rendering",
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"Automatically switch to software rendering when Windows has no hardware GPU": "Automatically switch to software rendering when Windows has no hardware GPU",
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"UniGetUI on the background and system tray": "UniGetUI on the background and system tray",
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"Package lists": "Package lists",
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"Use classic mode": "Use classic mode",

‎src/UniGetUI.Avalonia/Infrastructure/AvaloniaAppHost.cs‎

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@@ -1,5 +1,8 @@
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using System.Runtime.InteropServices;
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using Avalonia;
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#if WINDOWS
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using Avalonia.Win32;
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#endif
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using Avalonia.Threading;
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using UniGetUI.Core.Data;
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using UniGetUI.Core.Logging;
@@ -89,9 +92,22 @@ Welcome to UniGetUI Version {CoreData.VersionName}
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}
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public static AppBuilder BuildAvaloniaApp()
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=> AppBuilder.Configure<App>()
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.UsePlatformDetect()
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.LogToTrace();
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{
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AppBuilder builder = AppBuilder.Configure<App>()
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.UsePlatformDetect();
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#if WINDOWS
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if (WindowsAvaloniaRenderingPolicy.ShouldUseSoftwareRendering)
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{
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builder = builder.With(new Win32PlatformOptions
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{
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RenderingMode = [Win32RenderingMode.Software],
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});
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}
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#endif
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return builder.LogToTrace();
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}
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private static bool ShouldPrepareCliConsole(IReadOnlyList<string> args)
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{

‎src/UniGetUI.Avalonia/Infrastructure/MotionPreference.cs‎

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@@ -23,7 +23,13 @@ public static bool ReducedMotion
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get
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{
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if (OperatingSystem.IsWindows())
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{
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if (WindowsAvaloniaRenderingPolicy.ShouldReduceMotion)
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return true;
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2630
return GetWindowsReducedMotion();
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}
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2733
return _cachedUnix ??= GetUnixReducedMotion();
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}
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}

‎src/UniGetUI.Avalonia/Infrastructure/WindowsAvaloniaRenderingPolicy.cs‎

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@@ -0,0 +1,186 @@
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using Avalonia.Controls;
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using UniGetUI.Core.Logging;
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using CoreSettings = global::UniGetUI.Core.SettingsEngine.Settings;
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namespace UniGetUI.Avalonia.Infrastructure;
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internal static class WindowsAvaloniaRenderingPolicy
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{
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private static bool? _hasHardwareGpu;
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private static bool? _shouldUseSoftwareRendering;
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public static bool ShouldUseSoftwareRendering
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{
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get
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{
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if (_shouldUseSoftwareRendering is not null)
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return _shouldUseSoftwareRendering.Value;
20+
21+
if (!OperatingSystem.IsWindows() || Design.IsDesignMode)
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return false;
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24+
if (CoreSettings.Get(CoreSettings.K.DisableAutoSoftwareRenderingOnGpuLessHosts))
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return false;
26+
27+
_shouldUseSoftwareRendering = !HasHardwareGpu;
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if (_shouldUseSoftwareRendering.Value)
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{
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Logger.Warn(
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"No hardware GPU detected. Using Avalonia software rendering and reduced motion.");
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}
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return _shouldUseSoftwareRendering.Value;
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}
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}
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public static bool ShouldReduceMotion => ShouldUseSoftwareRendering;
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private static bool HasHardwareGpu
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{
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get
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{
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if (_hasHardwareGpu is not null)
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return _hasHardwareGpu.Value;
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Stopwatch stopwatch = Stopwatch.StartNew();
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_hasHardwareGpu = DetectHardwareGpu();
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stopwatch.Stop();
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Logger.Info(
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$"DXGI hardware GPU detection took {stopwatch.Elapsed.TotalMilliseconds:F1} ms; hardware GPU: {_hasHardwareGpu.Value}");
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return _hasHardwareGpu.Value;
55+
}
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}
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58+
private static bool DetectHardwareGpu()
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{
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try
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{
62+
Guid factoryIid = typeof(IDXGIFactory1).GUID;
63+
if (CreateDXGIFactory1(ref factoryIid, out object factoryObj) != HResult.Ok
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|| factoryObj is not IDXGIFactory1 factory)
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{
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Logger.Warn("Could not create DXGI factory; assuming a hardware GPU is present.");
67+
return true;
68+
}
69+
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try
71+
{
72+
for (uint i = 0; ; i++)
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{
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int hr = factory.EnumAdapters1(i, out IDXGIAdapter1 adapter);
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if (hr == HResult.DxgiErrorNotFound || hr != HResult.Ok || adapter is null)
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break;
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try
79+
{
80+
if (adapter.GetDesc1(out DXGI_ADAPTER_DESC1 desc) != HResult.Ok)
81+
continue;
82+
83+
bool isSoftwareAdapter =
84+
(desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) != 0
85+
|| (desc.VendorId == MicrosoftVendorId
86+
&& desc.DeviceId == BasicRenderDriverDeviceId);
87+
88+
if (!isSoftwareAdapter)
89+
return true;
90+
}
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finally
92+
{
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Marshal.ReleaseComObject(adapter);
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}
95+
}
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}
97+
finally
98+
{
99+
Marshal.ReleaseComObject(factory);
100+
}
101+
102+
return false;
103+
}
104+
catch (Exception ex)
105+
{
106+
Logger.Warn("Could not detect DXGI hardware GPU; assuming one is present.");
107+
Logger.Warn(ex);
108+
return true;
109+
}
110+
}
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112+
[DllImport("dxgi.dll", ExactSpelling = true)]
113+
private static extern int CreateDXGIFactory1(
114+
ref Guid riid,
115+
[MarshalAs(UnmanagedType.IUnknown)] out object ppFactory
116+
);
117+
118+
private static class HResult
119+
{
120+
public const int Ok = 0;
121+
public const int DxgiErrorNotFound = unchecked((int)0x887A0002);
122+
}
123+
124+
private const uint DXGI_ADAPTER_FLAG_SOFTWARE = 2;
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126+
// Microsoft Basic Render Driver (WARP) is enumerated with this VendorId/DeviceId pair.
127+
private const uint MicrosoftVendorId = 0x1414;
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private const uint BasicRenderDriverDeviceId = 0x8C;
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130+
[ComImport]
131+
[Guid("770aae78-f26f-4dba-a829-253c83d1b387")]
132+
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
133+
private interface IDXGIFactory1
134+
{
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void SetPrivateData();
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void SetPrivateDataInterface();
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void GetPrivateData();
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void GetParent();
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void EnumAdapters();
140+
void MakeWindowAssociation();
141+
void GetWindowAssociation();
142+
void CreateSwapChain();
143+
void CreateSoftwareAdapter();
144+
145+
[PreserveSig]
146+
int EnumAdapters1(uint adapter, out IDXGIAdapter1 ppAdapter);
147+
148+
[PreserveSig]
149+
bool IsCurrent();
150+
}
151+
152+
[ComImport]
153+
[Guid("29038f61-3839-4626-91fd-086879011a05")]
154+
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
155+
private interface IDXGIAdapter1
156+
{
157+
void SetPrivateData();
158+
void SetPrivateDataInterface();
159+
void GetPrivateData();
160+
void GetParent();
161+
void EnumOutputs();
162+
void GetDesc();
163+
void CheckInterfaceSupport();
164+
165+
[PreserveSig]
166+
int GetDesc1(out DXGI_ADAPTER_DESC1 pDesc);
167+
}
168+
169+
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
170+
private struct DXGI_ADAPTER_DESC1
171+
{
172+
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
173+
public string Description;
174+
175+
public uint VendorId;
176+
public uint DeviceId;
177+
public uint SubSysId;
178+
public uint Revision;
179+
public UIntPtr DedicatedVideoMemory;
180+
public UIntPtr DedicatedSystemMemory;
181+
public UIntPtr SharedSystemMemory;
182+
public uint AdapterLuidLowPart;
183+
public int AdapterLuidHighPart;
184+
public uint Flags;
185+
}
186+
}

‎src/UniGetUI.Avalonia/UniGetUI.Avalonia.csproj‎

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@@ -239,6 +239,7 @@
239239
<Compile Include="Infrastructure\RelayCommand.cs" />
240240
<Compile Include="Infrastructure\SingleInstanceRedirector.cs" />
241241
<Compile Include="Infrastructure\UninstallConfirmationDialog.cs" />
242+
<Compile Include="Infrastructure\WindowsAvaloniaRenderingPolicy.cs" />
242243
<Compile Update="App.axaml.cs">
243244
<DependentUpon>App.axaml</DependentUpon>
244245
</Compile>

‎src/UniGetUI.Avalonia/Views/Pages/SettingsPages/Interface_P.axaml‎

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2626
CornerRadius="0,0,8,8"
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BorderThickness="1,0,1,1"/>
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29+
<Border Height="16"/>
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31+
<settings:TranslatedTextBlock Text="Rendering"
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FontSize="14"
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FontWeight="SemiBold"
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Margin="44,32,4,8"
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automation:AutomationProperties.HeadingLevel="2"
36+
IsVisible="{Binding IsWindows}"/>
37+
38+
<settings:CheckboxCard SettingName="DisableAutoSoftwareRenderingOnGpuLessHosts"
39+
Text="{t:Translate Automatically switch to software rendering when Windows has no hardware GPU}"
40+
WarningText="{t:Translate Restart UniGetUI to apply this change}"
41+
StateChangedCommand="{Binding ShowRestartRequiredCommand}"
42+
CornerRadius="8"
43+
IsVisible="{Binding IsWindows}"/>
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2945
<Border Height="16"/>
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3147
<StackPanel x:Name="SystemTraySection" Orientation="Vertical">

‎src/UniGetUI.Core.Settings/SettingsEngine_Names.cs‎

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@@ -97,6 +97,7 @@ public enum K
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RedactUsernameInLog,
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DisableReleaseNotesOnUpdate,
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LastKnownBuildNumber,
100+
DisableAutoSoftwareRenderingOnGpuLessHosts,
100101

101102
Test1,
102103
Test2,
@@ -205,6 +206,7 @@ public static string ResolveKey(K key)
205206
K.RedactUsernameInLog => "RedactUsernameInLog",
206207
K.DisableReleaseNotesOnUpdate => "DisableReleaseNotesOnUpdate",
207208
K.LastKnownBuildNumber => "LastKnownBuildNumber",
209+
K.DisableAutoSoftwareRenderingOnGpuLessHosts => "DisableAutoSoftwareRenderingOnGpuLessHosts",
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209211
K.Test1 => "TestSetting1",
210212
K.Test2 => "TestSetting2",

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