private Task TakeScreenshot(string path, SupportedImageFormat format)
{
var source = new TaskCompletionSource <Unit>();
if (this.targetCanvas == null && !this.AssociatedObject.TryGetKanColleCanvas(out this.targetCanvas))
{
source.SetException(new Exception("艦これの Canvas 要素が見つかりません。"));
return(source.Task);
}
var request = new ScreenshotRequest(path, source);
var script = $@"
(async function()
{{
await CefSharp.BindObjectAsync('{request.Id}');
var canvas = document.querySelector('canvas');
requestAnimationFrame(() =>
{{
var dataUrl = canvas.toDataURL('{format.ToMimeType()}');
{request.Id}.complete(dataUrl);
}});
}})();
";
this.AssociatedObject.JavascriptObjectRepository.Register(request.Id, request, true);
this.targetCanvas.ExecuteJavaScriptAsync(script);
return(source.Task);
}
