public static MemoryStream OverlayAndPickDetailed(MemoryStream sourceStream, int width = 128, int height = 128)
{
WriteableBitmap source = new WriteableBitmap(UsefulThings.WPF.Images.CreateWPFBitmap(sourceStream));
WriteableBitmap dest = new WriteableBitmap(source.PixelWidth, source.PixelHeight, source.DpiX, source.DpiY, System.Windows.Media.PixelFormats.Bgra32, source.Palette);
// KFreon: Write onto black
var overlayed = Overlay(dest, source);
// KFreon: Choose the most detailed image between one with alpha merged and one without.
JpegBitmapEncoder enc = new JpegBitmapEncoder();
enc.QualityLevel = 90;
enc.Frames.Add(BitmapFrame.Create(overlayed));
MemoryStream mstest = new MemoryStream();
{
enc.Save(mstest);
MemoryStream jpg = ImageEngine.GenerateThumbnailToStream(sourceStream, width, height, false);
{
enc = new JpegBitmapEncoder();
enc.Frames.Add(BitmapFrame.Create(new WriteableBitmap(UsefulThings.WPF.Images.CreateWPFBitmap(jpg))));
enc.Save(jpg);
MemoryStream largest = jpg.Length > mstest.Length ? jpg : mstest;
return(largest);
}
}
}
public static string GenerateThumbnail(Stream sourceStream, string savePath, int maxWidth, int maxHeight)
{
using (MemoryStream stream = ImageEngine.GenerateThumbnailToStream(sourceStream, maxWidth, maxHeight, false, true))
{
if (stream == null)
{
return(null);
}
using (MemoryStream largest = OverlayAndPickDetailed(stream, maxWidth, maxHeight))
using (FileStream fs = new FileStream(savePath, FileMode.Create))
largest.WriteTo(fs);
return(savePath);
}
}
