拆分具体渲染逻辑

Author: lindexi

Workbench/Wmf/SkiaWmfRenderer/src/SkiaWmfRenderer/Rendering/WmfRenderer.cs

@@ -0,0 +1,57 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+using Oxage.Wmf;
+using SkiaSharp;
+
+namespace SkiaWmfRenderer;
+
+class WmfRenderer
+{
+    public required WmfDocument WmfDocument { get; init; }
+    public required int RequestWidth { get; init; }
+    public required int RequestHeight { get; init; }
+
+    public bool TryRender([NotNullWhen(true)] out SKBitmap? skBitmap)
+    {
+        skBitmap = null;
+
+        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
+
+        var format = WmfDocument.Format;
+
+        var x = Math.Min(format.Left, format.Right);
+        var y = Math.Min(format.Top, format.Bottom);
+
+        var width = Math.Abs(format.Right - format.Left);
+        var height = Math.Abs(format.Bottom - format.Top);
+
+        skBitmap = new SKBitmap(width, height, SKColorType.Bgra8888, SKAlphaType.Premul);
+
+        using SKCanvas canvas = new SKCanvas(skBitmap);
+
+        try
+        {
+            var result = TryRenderInner(canvas);
+
+            if (result)
+            {
+                return true;
+            }
+            else
+            {
+                skBitmap.Dispose();
+                return false;
+            }
+        }
+        catch (Exception e)
+        {
+            skBitmap.Dispose();
+            return false;
+        }
+    }
+
+    private bool TryRenderInner(SKCanvas canvas)
+    {
+        return true;
+    }
+}

Workbench/Wmf/SkiaWmfRenderer/src/SkiaWmfRenderer/SkiaWmfRenderHelper.cs

@@ -1,15 +1,8 @@
-using Oxage.Wmf;
+using System.Diagnostics.CodeAnalysis;
+using Oxage.Wmf;
 
 using SkiaSharp;
 
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Xml;
-
 namespace SkiaWmfRenderer;
 
 public static class SkiaWmfRenderHelper
@@ -51,28 +44,4 @@ public static bool TryRender(FileInfo wmfFile, int requestWidth, int requestHeig
 
         return wmfRenderer.TryRender(out skBitmap);
     }
-}
-
-class WmfRenderer
-{
-    public required WmfDocument WmfDocument { get; init; }
-    public required int RequestWidth { get; init; }
-    public required int RequestHeight { get; init; }
-
-    public bool TryRender([NotNullWhen(true)] out SKBitmap? skBitmap)
-    {
-        skBitmap = null;
-
-        Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
-
-        var format = WmfDocument.Format;
-
-        var x = Math.Min(format.Left, format.Right);
-        var y = Math.Min(format.Top, format.Bottom);
-
-        var width = Math.Abs(format.Right - format.Left);
-        var height = Math.Abs(format.Bottom - format.Top);
-
-        return skBitmap == null;
-    }
 }