public async Task <Byte[]> GetCropImageSourceData()
{
double sourceImageWidthScale = imageCanvas.Width / this.sourceImagePixelWidth;
double sourceImageHeightScale = imageCanvas.Height / this.sourceImagePixelHeight;
Size previewImageSize = new Size(
this.CropSelection.SelectedRect.Width / sourceImageWidthScale,
this.CropSelection.SelectedRect.Height / sourceImageHeightScale);
double previewImageScale = 1;
if (previewImageSize.Width <= imageCanvas.Width &&
previewImageSize.Height <= imageCanvas.Height)
{
}
else
{
previewImageScale = Math.Min(imageCanvas.Width / previewImageSize.Width,
imageCanvas.Height / previewImageSize.Height);
}
return(await BitmapHelper.GetCroppedBitmapSourceAsync(
this.SourceImageFile,
new Point(this.CropSelection.SelectedRect.X / sourceImageWidthScale, this.CropSelection.SelectedRect.Y / sourceImageHeightScale),
previewImageSize,
previewImageScale));
}
