「MAUIでSkiaSharpを使う」の版間の差分

@@ 42行目: / 42行目: @@
               xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
               xmlns:skia="clr-namespace:SkiaSharp.Views.Maui.Controls;assembly=SkiaSharp.Views.Maui.Controls"
-              x:Class="Capture8.MainPage">
+              x:Class="Maui8.MainPage">
-     <StackLayout>
+     <skia:SKCanvasView x:Name="canvasView"
-        <skia:SKCanvasView x:Name="canvasView" PaintSurface="canvasViewPaintSurface"/>
+                        PaintSurface="canvasViewPaintSurface"
-    </StackLayout>
+                        VerticalOptions="Fill"
+                        HorizontalOptions="Fill"
+                        />
 </ContentPage>
 </source>
+=== CS ===
+更新はメインスレッドでやる。
+<source lang="csharp">
+await MainThread.InvokeOnMainThreadAsync(() =>
+{
+	if (_bitmap != null)
+		_bitmap.Dispose();
+	_bitmap = bitmap;
+	canvasView.InvalidateSurface();
+});
+</source>
+描画
+<source lang="csharp">
+void canvasViewPaintSurface(Object sender, SKPaintSurfaceEventArgs e)
+{
+	if (_bitmap == null)
+		return;
+	using var canvas = e.Surface.Canvas;
+	canvas.Clear();
+	canvas.DrawBitmap(_bitmap, x:0, y:0);
+}
+</source>
 [[category: MAUI]]