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sample using accelerated renderer in offscreen environment #2

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c624497
sample using accelerated renderer on offscreen environment
AzeExMachina Oct 24, 2025
e7af26d
disposable pattern optimization in render handler
AzeExMachina Oct 25, 2025
997268b
adding resize functionality
AzeExMachina Oct 25, 2025
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -397,3 +397,4 @@ FodyWeavers.xsd
# JetBrains Rider
*.sln.iml
/CefSharp.WinForms.Direct3D.Example/obj.netcore
.idea/
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@amaitland amaitland Oct 25, 2025

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Is this required?

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@AzeExMachina AzeExMachina Oct 25, 2025

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It's a rider folder containing project specific settings files, it's not mandatory since I simply can avoid to commit that folder. It was just to make it easier when committing

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@amaitland amaitland Oct 25, 2025

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Thanks for the quick response, should be fine to leave.

42 changes: 42 additions & 0 deletions CefSharp.Offscreen.Direct3D.Example/AcceleratedRenderHandler.cs
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using CefSharp.OffScreen;
using CefSharp.Structs;

namespace CefSharp.Offscreen.Direct3D.Example;

public class AcceleratedRenderHandler(ChromiumWebBrowser browser, int windowWidth, int windowHeight) : DefaultRenderHandler(browser)
{
private D3D11Renderer _renderer = null!;

public override void OnAcceleratedPaint(PaintElementType type, Rect dirtyRect, AcceleratedPaintInfo acceleratedPaintInfo)
{
base.OnAcceleratedPaint(type, dirtyRect, acceleratedPaintInfo);
_renderer ??= new D3D11Renderer(windowWidth, windowHeight);
switch (type)
{
case PaintElementType.View:
_renderer?.OnAcceleratedPaint(acceleratedPaintInfo.SharedTextureHandle, PopupOpen);
break;
case PaintElementType.Popup:
_renderer?.CreatePopupLayer(acceleratedPaintInfo.SharedTextureHandle, new Rect(PopupPosition.X, PopupPosition.Y, PopupSize.Width, PopupSize.Height));
break;
}
}

public void BrowserWasResized(int width, int height)
{
_renderer?.ResizeWindow(width, height);
}

public override void OnPopupShow(bool show)
{
base.OnPopupShow(show);
if(show) return;
_renderer?.RemovePopupLayer();
}

public new void Dispose()
{
base.Dispose();
_renderer?.Dispose();
}
}
26 changes: 26 additions & 0 deletions CefSharp.Offscreen.Direct3D.Example/Application.cs
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namespace CefSharp.Offscreen.Direct3D.Example;

public class Application
{
public static Uri Url { get; set; } = new("https://github.com/cefsharp/CefSharp.OnAcceleratedPaint.Example");
private readonly OffscreenBrowser _browser;
public Application()
{
var cefBrowserSettings = new BrowserSettings
{
BackgroundColor = Cef.ColorSetARGB(255, 255, 255, 255),
WebGl = CefState.Enabled,
WindowlessFrameRate = 60,
LocalStorage = CefState.Default
};

_browser = new OffscreenBrowser(1920, 1080, Url.AbsoluteUri, cefBrowserSettings);
}

public void Close()
{
_browser.Stop();
_browser.Dispose();
Cef.Shutdown();
}
}
18 changes: 18 additions & 0 deletions CefSharp.Offscreen.Direct3D.Example/CefSharp.Offscreen.Direct3D.Example.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>disable</Nullable>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="CefSharp.OffScreen.NETCore" Version="133.4.21" />
<PackageReference Include="SharpDX.D3DCompiler" Version="4.2.0" />
<PackageReference Include="SharpDX.Direct2D1" Version="4.2.0" />
<PackageReference Include="SharpDX.Direct3D11" Version="4.2.0" />
<PackageReference Include="SharpDX.Mathematics" Version="4.2.0" />
</ItemGroup>

</Project>
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