private async void SaveImageFile(WriteableBitmap finalImage)
{
// Set up and launch the Save Picker
FileSavePicker fileSavePicker = new FileSavePicker();
fileSavePicker.FileTypeChoices.Add("PNG", new string[] { ".png" });
StorageFile savefile = await fileSavePicker.PickSaveFileAsync();
if (savefile == null)
{
return;
}
IRandomAccessStream stream = await savefile.OpenAsync(FileAccessMode.ReadWrite);
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
// Get pixels of the WriteableBitmap object
Stream pixelStream = finalImage.PixelBuffer.AsStream();
byte[] pixels = new byte[pixelStream.Length];
await pixelStream.ReadAsync(pixels, 0, pixels.Length);
// Save the image file with png extension
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)finalImage.PixelWidth, (uint)finalImage.PixelHeight, 96.0, 96.0, pixels);
await encoder.FlushAsync();
ShowFlyoutAboveInkToolbar?.Invoke("Image Saved");
}
private async void SaveStrokes(StorageFolder storageFolder, List <InkStrokeContainer> _strokes)
{
// Remove existing files from storageFolder
if (storageFolder != null)
{
IReadOnlyList <StorageFile> files = await storageFolder.GetFilesAsync();
foreach (var f in files)
{
if (f.FileType.Equals(".gif") && f.DisplayName.StartsWith("InkStroke"))
{
await f.DeleteAsync();
}
}
}
// Get all strokes on the InkCanvas.
IReadOnlyList <InkStroke> currentStrokes;
int i = 0;
foreach (var item in _strokes)
{
if (item.GetStrokes().Count > 0)
{
// Strokes present on ink canvas.
currentStrokes = item.GetStrokes();
var file = await storageFolder.CreateFileAsync("InkStroke" + i.ToString() + ".gif", CreationCollisionOption.ReplaceExisting);
// When chosen, picker returns a reference to the selected file.
if (file != null)
{
// Prevent updates to the file until updates are finalized with call to CompleteUpdatesAsync.
CachedFileManager.DeferUpdates(file);
// Open a file stream for writing.
IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.ReadWrite);
// Write the ink strokes to the output stream.
using (IOutputStream outputStream = stream.GetOutputStreamAt(0))
{
await item.SaveAsync(outputStream);
await outputStream.FlushAsync();
}
stream.Dispose();
// Finalize write so other apps can update file.
Windows.Storage.Provider.FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file);
}
i++;
}
}
ShowFlyoutAboveInkToolbar?.Invoke("Project Saved");
}