public static void PatchAwayExif(Stream inStream, out MemoryStream exifStream)
{
exifStream = new MemoryStream();
byte[] numArray = new byte[2] {
(byte)inStream.ReadByte(), (byte)inStream.ReadByte()
};
if ((int)numArray[0] != (int)byte.MaxValue || (int)numArray[1] != 216)
{
return;
}
ImagePreprocessor.SkipAppHeaderSection(inStream, out exifStream);
}
public static void PreprocessImage(Stream stream, int desiredSizeInPx, bool closeStream, Action <ImagePreprocessResult> completionCallback)
{
Stopwatch.StartNew();
try
{
MemoryStream exifStream;
ImagePreprocessor.PatchAwayExif(stream, out exifStream);
long position = stream.Position;
bool keepExif = AppGlobalStateManager.Current.GlobalState.SaveLocationDataOnUpload;
stream.Position = 0L;
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.SetSource(stream);
WriteableBitmap wb = new WriteableBitmap((BitmapSource)bitmapImage);
ExifReader reader = (ExifReader)null;
stream.Position = 0L;
reader = new ExifReader(stream);
bool flag = false;
switch (reader.info.Orientation)
{
case ExifOrientation.BottomRight:
wb = wb.Rotate(180);
flag = true;
break;
case ExifOrientation.TopRight:
wb = wb.Rotate(90);
flag = true;
break;
case ExifOrientation.BottomLeft:
wb = wb.Rotate(270);
flag = true;
break;
}
int pixelWidth = wb.PixelWidth;
int pixelHeight = wb.PixelHeight;
int num1 = pixelWidth * pixelHeight;
if (desiredSizeInPx > num1)
{
desiredSizeInPx = num1;
}
if (num1 > desiredSizeInPx | flag)
{
MemoryStream ms = new MemoryStream();
double num2 = Math.Sqrt((double)num1 / (double)desiredSizeInPx);
int resizedWidth = (int)Math.Round((double)pixelWidth / num2);
int resizedHeight = (int)Math.Round((double)pixelHeight / num2);
ThreadPool.QueueUserWorkItem((WaitCallback)(o =>
{
try
{
Stream resultStream;
wb.SaveJpeg((Stream)ms, resizedWidth, resizedHeight, 0, VKConstants.JPEGQUALITY);
ms.Position = 0;
if (keepExif)
{
exifStream = new MemoryStream(ImagePreprocessor.ResetOrientation(reader.info.OrientationOffset, exifStream.ToArray(), reader.info.LittleEndian));
resultStream = ImagePreprocessor.MergeExif((Stream)ms, exifStream);
Logger.Instance.Info("RESIZED JPEG SIZE: " + (object)resultStream.Length);
ms.Close();
}
else
{
resultStream = ms;
}
if (closeStream)
{
stream.Close();
}
exifStream.Close();
resultStream.Position = 0L;
GC.Collect();
completionCallback(new ImagePreprocessResult((Stream)resultStream, resizedWidth, resizedHeight));
}
catch (Exception ex)
{
Logger.Instance.Error("Failed to resize image", ex);
}
}));
}
else
{
MemoryStream resultStream = new MemoryStream();
if (keepExif)
{
stream.Position = 0;
stream.CopyTo((Stream)resultStream);
if (closeStream)
{
stream.Close();
}
}
else
{
stream.Position = 0;
resultStream.WriteByte((byte)stream.ReadByte());
resultStream.WriteByte((byte)stream.ReadByte());
stream.Position = position;
stream.CopyTo((Stream)resultStream);
}
if (closeStream)
{
stream.Close();
}
exifStream.Close();
resultStream.Position = 0;
GC.Collect();
completionCallback(new ImagePreprocessResult((Stream)resultStream, pixelWidth, pixelHeight));
}
}
catch (Exception ex)
{
Logger.Instance.Error("Failed to resize image", ex);
}
}