public ImageSource GetImageSourceAsync(string filePath, ImageSource _default, Action <ImageSource> onLoaded)
{
if (File.Exists(filePath) is false)
{
return(_default);
}
void DecodeAction()
{
var thumnbnailServis = new ThumbnailService(filePath);
if (thumnbnailServis.ExistsThumnail is false)
{
CreateThumbnail(filePath);
}
Application.Current.Dispatcher.InvokeAsync(() =>
{
onLoaded(GetImageSource(filePath));
}, DispatcherPriority.ContextIdle);
}
if (UsingSingleThread)
{
DecodeAction();
}
else if (_staWorkerManager != null)
{
_staWorkerManager.AddJob(DecodeAction);
}
else
{
TaskEx.RunOnSta(DecodeAction);
}
return(_default);
}
public ImageSource GetImageSource(string filePath)
{
var thumnbnailServis = new ThumbnailService(filePath);
if (thumnbnailServis.ExistsThumnail is false)
{
CreateThumbnail(filePath);
}
var image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = thumnbnailServis.GetThumnailMemorySteream();
image.EndInit();
return(image.DoFreeze());
}
private void CreateThumbnail(string filePath)
{
var thumnbnailServis = new ThumbnailService(filePath);
var view = new Border()
{
Width = _setupInfo.Width,
Height = _setupInfo.Height,
};
var pathGeometry = SvgThumbnailUtil.GetGeometry(filePath);
var path = new System.Windows.Shapes.Path()
{
Data = pathGeometry,
Fill = _setupInfo.Fill,
Stroke = _setupInfo.Stroke,
StrokeThickness = _setupInfo.StrokeThickness,
Stretch = Stretch.Uniform,
Opacity = 1.0,
StrokeLineJoin = _setupInfo.StrokeLineJoin,
};
view.Child = path;
view.Measure(new Size(_setupInfo.Width, _setupInfo.Height));
view.Arrange(new Rect(new Size(_setupInfo.Width, _setupInfo.Height)));
//! rendering
var bmp = new RenderTargetBitmap(_setupInfo.Width, _setupInfo.Height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(view);
//! save and encode to file
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
lock (_lock)
{
thumnbnailServis.CreateThumbnailDirectory();
using (var stream = File.Create(thumnbnailServis.ThumbnailPath))
encoder.Save(stream);
}
}
