'' 完毕：
Imports System.IO
Imports System.Drawing
Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Text
Imports GCTEXT = GrapeCity.Documents.Text
Imports GCDRAW = GrapeCity.Documents.Drawing

'' 一些有趣的字体功能的简单演示。
'' 有关字体功能的完整列表，请参阅
Public Class FontFeatures
    Function CreatePDF(ByVal stream As Stream) As Integer
        Dim doc = New GcPdfDocument()
        Dim g = doc.NewPage().Graphics
        ''
        Dim fnt = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "Gabriola.ttf"))
        Dim tf = New TextFormat() With {.Font = fnt, .FontSize = 20}
        ''
        Dim tl = g.CreateTextLayout()
        tl.AppendLine("线路没有自定义字体功能。", tf)
        ''
        tf.FontFeatures = New FontFeature() {New FontFeature(FeatureTag.ss03)}
        tl.AppendLine("启用字体功能 ss03 的线路。", tf)
        ''
        tf.FontFeatures = New FontFeature() {New FontFeature(FeatureTag.ss05)}
        tl.AppendLine("启用字体功能 ss05 的线路。", tf)
        ''
        tf.FontFeatures = New FontFeature() {New FontFeature(FeatureTag.ss07)}
        tl.AppendLine("启用字体功能 ss07 的线路。", tf)
        ''
        tl.PerformLayout(true)
        g.DrawTextLayout(tl, New PointF(72, 72))
        ''
        '' 完毕：
        doc.Save(stream)
        Return doc.Pages.Count
    End Function
End Class