Render PDF with ResolveFont event handler

When you try to render a PDF which uses non-system fonts, you can add your own specified fonts to make sure it is rendered correctly.

static void Main(string[] args)
{
    using (FileStream fs = new FileStream("input.pdf",FileMode.Open,FileAccess.Read))
    {
        Document d = new Document(fs);
        Page page = d.Pages[0];

        RenderSettings renderSettings = new RenderSettings();
        renderSettings.TextSettings.ResolveFont += new ResolveFontEventHandler(Resolve);

        Bitmap bmp = new Bitmap((int)page.Width * 4, (int)page.Height * 4);
        using (Graphics graphics = Graphics.FromImage(bmp))
        {
            graphics.ScaleTransform(4.0f, 4.0f);
            page.Draw(graphics, renderSettings);
        }
    }
}

// map all non-system fonts to arial
static void Resolve(TextRenderSettings sender, ResolveFontEventArgs args)
{
    if (args.FontLocation != FontLocation.System)
    {
        args.FontRenderMode = FontRenderMode.RenderAsFont;

        if (args.PdfFontName.EndsWith("Bold"))
        {
            args.Bold = true;
        }

        args.SystemFontName = "Arial";
    }
}