Linear Gradient Brush in Direct2D breaks after version 2.1.41

[Dovencio]

I'm using:

C# .NET 6 Core DirectX 12.1 NVIDIA GeForce GTX 4070 Ti

Description:

Attempting to draw with a linear gradient brush after version 2.1.41 causes unexpected results. I'm using the following method below with all set to true to create the factories.

private void RegenerateDX(bool all = false)
{
    if (all)
    { 
        writeFactory?.Release();
        direct2DFactory?.Release();
        hwndRenderTarget?.Release();
    }
    textFormat?.Release();
    defaultBrush?.Release();

    if (all)
    {
        writeFactory = DWrite.DWriteCreateFactory<IDWriteFactory>(Vortice.DirectWrite.FactoryType.Isolated);
        direct2DFactory = D2D1.D2D1CreateFactory<ID2D1Factory>(Vortice.Direct2D1.FactoryType.MultiThreaded);
    }
    textFormat = writeFactory.CreateTextFormat(Font.Name, Font.Size); 
    IDWriteTextLayout layout = writeFactory.CreateTextLayout("█", textFormat, Width, Height);
    tileSize = new(layout.ClusterMetrics[0].Width, layout.LineMetrics[0].Height);
    layout.Release();

    textFormat.TextAlignment = TextAlignment.Leading;
    textFormat.ParagraphAlignment = ParagraphAlignment.Near;
    textFormat.SetLineSpacing(LineSpacingMethod.Default, 0, 0);
    RenderTargetProperties renderTargetProperties = new RenderTargetProperties()
    {
        DpiX = DeviceDpi,
        DpiY = DeviceDpi,
        Type = RenderTargetType.Hardware,
        Usage = RenderTargetUsage.None,
    };
    HwndRenderTargetProperties hwndRenderTargetProperties = new()
    {
        Hwnd = Handle,
        PixelSize = new SizeI(Right - Left, Bottom - Top),
        PresentOptions = PresentOptions.None
    };

    if (all)
    {
        hwndRenderTarget = direct2DFactory.CreateHwndRenderTarget(renderTargetProperties, hwndRenderTargetProperties); 
    }
    defaultBrush = hwndRenderTarget.CreateSolidColorBrush(System.Drawing.Color.HotPink.ToColor4());
    Invalidate();
}

Then I use this method to draw the gradient:

ID2D1GradientStopCollection stopCollection = hwndRenderTarget.CreateGradientStopCollection(gradientStops, ExtendMode.Wrap);
ID2D1LinearGradientBrush GradBrush = hwndRenderTarget.CreateLinearGradientBrush(new(new(0, 0), new(100, 100)), stopCollection);
hwndRenderTarget.BeginDraw();
hwndRenderTarget.Clear(base.BackColor.ToColor());
hwndRenderTarget.FillRectangle(new Rect(0, 0, 500, 500), GradBrush);
hwndRenderTarget.EndDraw();

Expected Result:

In version 2.1.41:

Actual Result:

In version 2.2.0+:

[amerkoleci]

Can you provide an example repo so I can try and run a demo?

[manju-summoner]

There seems to be some confusion between new Color(float r, float g, float b, float a); and new Color(byte r, byte g, byte b, byte a);. The first constructor takes values 0.0 - 1.0 and the second takes values 0 - 255.

[Dovencio]

Here is one that I made quickly using VS 2022 that should reflect the error. If the error pattern is hard to see you can change userControl1.BackColor = System.Drawing.Color.Black https://github.com/Dovencio/GradTest

[amerkoleci]

Here is one that I made quickly using VS 2022 that should reflect the error. If the error pattern is hard to see you can change userControl1.BackColor = System.Drawing.Color.Black https://github.com/Dovencio/GradTest

Versione3.0.1-beta fixes this, please check and report any issues.

[Dovencio]

Verified fixed on V. 3.0.1-beta