/// <summary>
/// Transforms image stream with given parameters.
/// </summary>
/// <param name="imageStream">Image as stream to transform</param>
/// <returns>New stream with transformed image</returns>
public System.IO.Stream TransformImage(System.IO.Stream imageStream)
{
#region validation
if (imageStream == null)
{
throw new ArgumentNullException(nameof(imageStream));
}
#endregion
// rewind stream to begin
imageStream.Rewind();
// craete image service instance
ImageService imageService = new ImageService();
foreach (ImageTransformationConfiguration transformation in ImageTransformationConfigurations)
{
switch (transformation.TransformationMode)
{
case EImageTransformationMode.None:
// no tranformation needed. Skip.
break;
case EImageTransformationMode.Crop:
// crop image
imageStream = imageService.CropSquareImage(imageStream);
break;
case EImageTransformationMode.Fill:
// fill image with color
imageStream = imageService.FillImage(imageStream, transformation.FillColor, transformation.FillWidth, transformation.FillHeight);
break;
case EImageTransformationMode.Scale:
// scale image to desired size
imageStream = imageService.ResizeImage(imageStream, transformation.ScaleWidth, transformation.ScaleHeight);
break;
}
}
return(imageStream.CopyStream());
}