Expose SKSurface from ISkiaDrawingContextImpl

src/Skia/Avalonia.Skia/DrawingContextImpl.cs

@@ -44,7 +44,7 @@ namespace Avalonia.Skia
             /// <summary>
             /// Canvas to draw to.
             /// </summary>
-            public SKCanvas Canvas;
+            public SKSurface Surface;
 
             /// <summary>
             /// Dpi of drawings.
@@ -81,8 +81,8 @@ namespace Avalonia.Skia
             _grContext = createInfo.GrContext;
             if (_grContext != null)
                 Monitor.Enter(_grContext);
-            
-            Canvas = createInfo.Canvas;
+            Surface = createInfo.Surface;
+            Canvas = createInfo.Surface.Canvas;
 
             if (Canvas == null)
             {
@@ -102,8 +102,10 @@ namespace Avalonia.Skia
         /// Skia canvas.
         /// </summary>
         public SKCanvas Canvas { get; }
+        public SKSurface Surface { get; }
 
         SKCanvas ISkiaDrawingContextImpl.SkCanvas => Canvas;
+        SKSurface ISkiaDrawingContextImpl.SkSurface => Surface;
         GRContext ISkiaDrawingContextImpl.GrContext => _grContext;
 
         /// <inheritdoc />

src/Skia/Avalonia.Skia/FramebufferRenderTarget.cs

@@ -52,7 +52,7 @@ namespace Avalonia.Skia
 
             var createInfo = new DrawingContextImpl.CreateInfo
             {
-                Canvas = canvas,
+                Surface = _framebufferSurface,
                 Dpi = framebuffer.Dpi,
                 VisualBrushRenderer = visualBrushRenderer,
                 DisableTextLcdRendering = true

src/Skia/Avalonia.Skia/Gpu/ISkiaGpuRenderSession.cs

@@ -16,7 +16,7 @@ namespace Avalonia.Skia
         /// <summary>
         /// Canvas that will be used to render.
         /// </summary>
-        SKCanvas Canvas { get; }
+        SKSurface SkSurface { get; }
 
         /// <summary>
         /// Scaling factor.

src/Skia/Avalonia.Skia/Gpu/OpenGl/GlRenderTarget.cs

@@ -49,7 +49,7 @@ namespace Avalonia.Skia
             }
 
             public GRContext GrContext { get; }
-            public SKCanvas Canvas => _surface.Canvas;
+            public SKSurface SkSurface => _surface;
             public double ScaleFactor => _glSession.Scaling;
         }
 

src/Skia/Avalonia.Skia/Gpu/SkiaGpuRenderTarget.cs

@@ -27,7 +27,7 @@ namespace Avalonia.Skia
             var nfo = new DrawingContextImpl.CreateInfo
             {
                 GrContext = session.GrContext,
-                Canvas = session.Canvas,
+                Surface = session.SkSurface,
                 Dpi = SkiaPlatform.DefaultDpi * session.ScaleFactor,
                 VisualBrushRenderer = visualBrushRenderer,
                 DisableTextLcdRendering = true

src/Skia/Avalonia.Skia/ISkiaDrawingContextImpl.cs

@@ -7,5 +7,6 @@ namespace Avalonia.Skia
     {
         SKCanvas SkCanvas { get; }
         GRContext GrContext { get; }
+        SKSurface SkSurface { get; }
     }
 }

src/Skia/Avalonia.Skia/SurfaceRenderTarget.cs

@@ -70,7 +70,7 @@ namespace Avalonia.Skia
             
             var createInfo = new DrawingContextImpl.CreateInfo
             {
-                Canvas = _canvas,
+                Surface = _surface,
                 Dpi = Dpi,
                 VisualBrushRenderer = visualBrushRenderer,
                 DisableTextLcdRendering = _disableLcdRendering,