Drawing Text in a GPU Drawing Plugin

protected override unsafe void OnDraw(IDeviceContext deviceContext)
{
	// maintain background
    deviceContext.DrawImage(Environment.SourceImage);
	
	// get the size of our canvas
    RectFloat sourceBounds = new RectFloat(Point2Float.Zero, Environment.Document.Size);
	
	// create a red brush in order to render red text
    ISolidColorBrush solidFillBrush = deviceContext.CreateSolidColorBrush(LinearColors.Red);
	
	// set the antialiasing modes
    deviceContext.AntialiasMode = AntialiasMode.PerPrimitive;
    deviceContext.TextAntialiasMode = TextAntialiasMode.Grayscale;
	
	// set the text rendering mode
    deviceContext.UseTextRenderingMode(TextRenderingMode.Outline);
	
	// prepare for rendering text
    IDirectWriteFactory textFactory = this.Services.GetService<IDirectWriteFactory>();
    IGdiFontMap fm = textFactory.GetGdiFontMap();
	
	// select your font to look at the font properties
    FontProperties fp = fm.TryGetFontProperties("Arial");
	
	// use your font properties to create a font
    ITextFormat textFormat = textFactory.CreateTextFormat(
        fp.FontFamilyName, // font family name
        null,
        FontWeight.Bold, // font weight
        FontStyle.Normal, // font style
        fp.Stretch, // how to stretch the font
        72); // size in points
		
	// render the text
    deviceContext.DrawText(
		"Paint.NET Rocks!", // the actual text to render
		textFormat, // format of text defined above
		sourceBounds, // text location
		solidFillBrush, // our red brush, from above
		DrawTextOptions.None); // Options
}