/// <summary>
/// Converts the byte array to a <see cref="BitmapImage"/> instance.
/// </summary>
/// <param name="imageData">
/// The byte array to convert.
/// </param>
/// <returns>
/// The <see cref="BitmapImage"/> instance if the image presented by <paramref name="imageData"/>.
/// </returns>
public static BitmapImage ToBitmap(this byte[] imageData, SV.ImageLoader.Size size)
{
var bitmap = new BitmapImage();
if (size.Width >= size.Height)
{
bitmap.DecodePixelWidth = size.Width;
}
else
{
bitmap.DecodePixelHeight = size.Height;
}
using (var stream = new MemoryStream(imageData))
{
bitmap.SetSource(stream);
}
return(bitmap);
}
/// <summary>
/// Resizes the image presented by the <paramref name="imageData"/> to a <paramref name="newSize"/>.
/// </summary>
/// <param name="imageData">
/// The binary data of the image to resize.
/// </param>
/// <param name="newSize">
/// The size to which to resize the image.
/// </param>
/// <param name="keepAspectRatio">
/// A flag indicating whether to save original aspect ratio.
/// </param>
/// <returns>
/// The structure which contains binary data of resized image and the actial size of resized image depending on <paramref name="keepAspectRatio"/> value.
/// </returns>
public static Task <ImageInfo> ResizeAsync(this byte[] imageData, SV.ImageLoader.Size newSize, bool keepAspectRatio)
{
var tcs = new TaskCompletionSource <ImageInfo>();
DispatcherHelper.InvokeAsync(() =>
{
var result = new ImageInfo();
var bitmap = imageData.ToBitmap(newSize);
using (var resizedStream = new MemoryStream())
{
var writableBitmap = new WriteableBitmap(bitmap);
writableBitmap.SaveJpeg(resizedStream, bitmap.PixelWidth, bitmap.PixelHeight, 0, 100);
resizedStream.Seek(0, SeekOrigin.Begin);
result.Data = resizedStream.GetBuffer();
result.Size = new SV.ImageLoader.Size(bitmap.PixelWidth, bitmap.PixelHeight);
}
tcs.SetResult(result);
});
return(tcs.Task);
}
