static void InvalidateCanvas(string base64, string canvasId, int width, int height)
{
if (base64 == null)
{
return;
}
var data = Convert.FromBase64String(base64);
var info = new SKImageInfo(width, height, SKImageInfo.PlatformColorType, SKAlphaType.Premul);
var pixels = new byte[info.BytesSize];
var pixelsHandle = GCHandle.Alloc(pixels, GCHandleType.Pinned);
using (var picture = SKPicture.Deserialize(data))
using (var surface = SKSurface.Create(info, pixelsHandle.AddrOfPinnedObject(), info.RowBytes))
{
var canvas = surface.Canvas;
canvas.DrawPicture(picture);
}
Interop.Runtime.InvokeJS($"invalidateCanvas({pixelsHandle.AddrOfPinnedObject()}, \"{canvasId}\", {width}, {height});");
pixelsHandle.Free();
}
public void CanSerializeAndDeserializePicture()
{
using var recorder = new SKPictureRecorder();
using var canvas = recorder.BeginRecording(SKRect.Create(0, 0, 40, 40));
using var picture = recorder.EndRecording();
using var data = picture.Serialize();
using var deserialized = SKPicture.Deserialize(data);
Assert.NotNull(deserialized);
}
public void CanDeserializeFromData()
{
using var picture = CreateTestPicture();
using var data = picture.Serialize();
using var bmp = new SKBitmap(40, 40);
using var cnv = new SKCanvas(bmp);
using var deserialized = SKPicture.Deserialize(data);
Assert.Equal(SKRect.Create(0, 0, 40, 40), deserialized.CullRect);
cnv.DrawPicture(deserialized);
ValidateTestBitmap(bmp);
}
