private async void PlayGif_OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { ProcessingGif = true; var metadata = await HttpClientFactory.AppApiService().GetUgoiraMetadata(Illust.Id); var ugoiraZip = metadata.UgoiraMetadataInfo.ZipUrls.Medium; var delay = metadata.UgoiraMetadataInfo.Frames.Select(f => f.Delay / 10).ToArray(); var streams = InternalIO.ReadGifZipEntries(await PixivIO.GetBytes(ugoiraZip)).ToArray(); ProcessingGif = false; PlayingGif = true; #pragma warning disable 4014 Task.Run(async() => { while (!cancellationToken.IsCancellationRequested) { for (var i = 0; i < streams.Length && !cancellationToken.IsCancellationRequested; i++) { streams[i].Position = 0; ImgSource = InternalIO.CreateBitmapImageFromStream(streams[i]); await Task.Delay((int)delay[i], cancellationToken.Token); } } }); #pragma warning restore 4014 }
private async void DownloadGif() { var downloadPath = GetPath(); try { var metadata = await HttpClientFactory.AppApiService().GetUgoiraMetadata(DownloadContent.Id); var ugoiraUrl = metadata.UgoiraMetadataInfo.ZipUrls.Medium; ugoiraUrl = !ugoiraUrl.EndsWith("ugoira1920x1080.zip") ? Regex.Replace(ugoiraUrl, "ugoira(\\d+)x(\\d+).zip", "ugoira1920x1080.zip") : ugoiraUrl; var delay = metadata.UgoiraMetadataInfo.Frames.Select(f => f.Delay / 10).ToArray(); if (cancellationTokenSource.IsCancellationRequested) { return; } await using var memory = await PixivIO.Download(ugoiraUrl, new Progress <double>(d => Progress = d), cancellationTokenSource.Token); await using var gifStream = (MemoryStream)InternalIO.MergeGifStream(InternalIO.ReadGifZipEntries(memory), delay); if (cancellationTokenSource.IsCancellationRequested) { return; } await using var fileStream = new FileStream(downloadPath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); gifStream.WriteTo(fileStream); DownloadState.Value = DownloadStateEnum.Finished; } catch (TaskCanceledException) { if (downloadPath != null && File.Exists(downloadPath)) { File.Delete(downloadPath); } } catch (Exception e) { if (!retried) { Restart(); retried = true; } else { HandleError(e, downloadPath); } } }