/// <summary>
/// Renders the IImageProvider into a WriteableBitmap. If the passed WriteableBitmap is non-null, and it matches the passed size, it will be reused. Otherwise this method creates a new WriteableBitmap. Note that this method must be called on the UI thread.
/// </summary>
/// <param name="imageProvider">The image provider to render the image content of.</param>
/// <param name="writeableBitmap">The WriteableBitmap to reuse, if possible. If null is passed, a new WriteableBitmap is created.</param>
/// <param name="size">The desired size of the rendered image.</param>
/// <param name="outputOption">Specifies how to fit the image into the rendered rectangle, if the aspect ratio differs.</param>
/// <returns>A task resulting in either the reused WriteableBitmap, or a new one if necessary.</returns>
public static Task <WriteableBitmap> GetBitmapAsync(this IImageProvider imageProvider, WriteableBitmap writeableBitmap, Size size, OutputOption outputOption)
{
if (writeableBitmap == null || writeableBitmap.PixelWidth != (int)size.Width || writeableBitmap.PixelHeight != (int)size.Height)
{
writeableBitmap = new WriteableBitmap((int)size.Width, (int)size.Height);
}
return(imageProvider.GetBitmapAsync(writeableBitmap, outputOption).AsTask());
}
/// <summary>
/// Renders the IImageProvider into a Bitmap. If the passed Bitmap is non-null, and it matches the passed size and color mode, it will be reused. Otherwise this method creates a new Bitmap.
/// </summary>
/// <param name="imageProvider">The image provider to render the image content of.</param>
/// <param name="bitmap">The Bitmap to reuse, if possible. If null is passed, a new Bitmap is created.</param>
/// <param name="size">The desired size of the rendered image.</param>
/// <param name="outputOption">Specifies how to fit the image into the rendered rectangle, if the aspect ratio differs.</param>
/// <returns>A task resulting in either the reused Bitmap, or a new one if necessary.</returns>
public static Task <Bitmap> GetBitmapAsync(this IImageProvider imageProvider, Bitmap bitmap, Size size, ColorMode colorMode, OutputOption outputOption)
{
if (bitmap == null || bitmap.Dimensions != size || bitmap.ColorMode != colorMode)
{
bitmap = new Bitmap(size, colorMode);
}
return(imageProvider.GetBitmapAsync(bitmap, outputOption).AsTask());
}
public IAsyncOperation <Bitmap> GetBitmapAsync(Bitmap bitmap, OutputOption outputOption)
{
return(m_imageProvider.GetBitmapAsync(bitmap, outputOption));
}