经过测试，能够拿到字体，但渲染内容是空的

Author: lindexi

src/MediaConverters/SkiaWmfRenderer/src/SkiaWmfRenderer/Rendering/WmfRenderStatus.cs

@@ -55,13 +55,20 @@ public CharacterSet CurrentCharacterSet
     public SKFont SKFont { get; } = new SKFont();
 
 
-    public void UpdateSkiaTextStatus()
+    public void UpdateSkiaTextStatus(string text)
     {
         var skFont = SKFont;
         skFont.Size = CurrentFontSize;
-        skFont.Typeface = SKTypeface.FromFamilyName(CurrentFontName, (SKFontStyleWeight) FontWeight,
+
+        skFont.Typeface?.Dispose();
+
+        SKTypeface? typeface = SKTypeface.FromFamilyName(CurrentFontName, (SKFontStyleWeight) FontWeight,
             SKFontStyleWidth.Normal, IsItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
 
+        Console.WriteLine($"CurrentFontName='{CurrentFontName}' get the SKTypeface {(typeface is null ? "is null" : "not null")}. Text={text}");
+
+        skFont.Typeface = typeface;
+
         Paint.Style = SKPaintStyle.Fill;
         Paint.Color = CurrentTextColor;
     }
@@ -87,6 +94,7 @@ public void UpdateSkiaFillStatus()
     public void Dispose()
     {
         Paint.Dispose();
+        SKFont.Typeface?.Dispose();
         SKFont.Dispose();
     }
 }

src/MediaConverters/SkiaWmfRenderer/src/SkiaWmfRenderer/Rendering/WmfRenderer.cs

@@ -2,6 +2,7 @@
 using Oxage.Wmf.Records;
 using SkiaSharp;
 using System;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 
 namespace SkiaWmfRenderer.Rendering;
@@ -410,7 +411,7 @@ private static bool RenderRecord(SKCanvas canvas, WmfRenderStatus renderStatus,
 
             var currentXOffset = renderStatus.CurrentX + extTextoutRecord.X + renderStatus.LastDxOffset;
 
-            renderStatus.UpdateSkiaTextStatus();
+            renderStatus.UpdateSkiaTextStatus(text);
 
             if (extTextoutRecord.Dx is null)
             {
@@ -449,6 +450,8 @@ private static bool RenderRecord(SKCanvas canvas, WmfRenderStatus renderStatus,
             {
                 case RecordType.META_EXTTEXTOUT:
                 {
+                    Debug.Fail("当前已经有 WmfExtTextoutRecord 类型了");
+
                     renderStatus.IsIncludeText = true;
 
                     // 关于字间距的规则： 
@@ -487,7 +490,7 @@ private static bool RenderRecord(SKCanvas canvas, WmfRenderStatus renderStatus,
                     //Debug.Assert(st == unknownRecord.RecordSize);
                     var dxLength = unknownRecord.Data.Length - st;
 
-                    renderStatus.UpdateSkiaTextStatus();
+                    renderStatus.UpdateSkiaTextStatus(text);
 
                     var currentXOffset = renderStatus.CurrentX + tx + renderStatus.LastDxOffset;