//public static Layer.AutoSaveLayer Create(PaintContext paint_context, SKCanvas.SaveLayerRec layer_rec)
//{
// return new Layer.AutoSaveLayer(paint_context, layer_rec);
//}
public void Dispose()
{
if (paint_context_.checkerboard_offscreen_layers)
{
PaintUtils.DrawCheckerboard(paint_context_.canvas, bounds_);
}
paint_context_.canvas.Restore();
}
public void BeginFrame()
{
var window = FlutterBinding.UI.Window.Instance;
double devicePixelRatio = window.devicePixelRatio;
var physicalSize = window.physicalSize;
var logicalSize = physicalSize / devicePixelRatio;
var paragraphBuilder = new ParagraphBuilder(new ParagraphStyle());
paragraphBuilder.addText("Hello, world!");
var paragraph = paragraphBuilder.build();
paragraph.layout(new ParagraphConstraints(width: logicalSize.width));
var physicalBounds = Offset.zero & physicalSize;
var recorder = new PictureRecorder();
var canvas = new FlutterBinding.UI.Canvas(recorder, physicalBounds);
canvas.scale((float)devicePixelRatio, (float)devicePixelRatio);
PaintUtils.DrawCheckerboard(canvas.RecordingCanvas, new SKRect(0, 0, (float)physicalSize.width, (float)physicalSize.height));
var circlePaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
IsAntialias = true,
StrokeWidth = 3,
Color = SKColors.OrangeRed
};
canvas.drawCircle(new Offset(logicalSize.width / 2, logicalSize.height / 2), 100, circlePaint);
canvas.drawParagraph(paragraph, new Offset(
(logicalSize.width - paragraph.maxIntrinsicWidth) / 2.0,
(logicalSize.height - paragraph.height) / 2.0));
var picture = recorder.endRecording();
var sceneBuilder = new SceneBuilder();
sceneBuilder.pushClipRect(physicalBounds);
sceneBuilder.addPicture(Offset.zero, picture);
sceneBuilder.pop();
var scene = sceneBuilder.build();
window.render(scene);
}