public override unsafe void CodeImage(Bitmap bitmap, Stream outStream)
{
lock (ImageProcessLock)
{
if (!outStream.CanWrite)
{
throw new Exception("Must have access to Write in the Stream");
}
if (LastFrame == null)
{
byte[] temp = base.jpgCompression.Compress(bitmap);
outStream.Write(BitConverter.GetBytes(temp.Length), 0, 4);
outStream.Write(temp, 0, temp.Length);
SetLastFrame(ref bitmap);
return;
}
long oldPos = outStream.Position;
outStream.Write(new byte[4], 0, 4);
int TotalDataLength = 0;
List <byte[]> updates = new List <byte[]>();
SimpleBitmap sbBmp = new SimpleBitmap(bitmap);
MemoryStream ms = new MemoryStream();
byte[] buffer = null;
if (!LastFrame.Locked)
{
LastFrame.Lock();
}
sbBmp.Lock();
if (sbBmp.Info.PixelSize != LastFrame.Info.PixelSize)
{
throw new Exception("PixelFormat is not equal to previous Bitmap");
}
if (LastFrame.Info.Width != sbBmp.Info.Width || LastFrame.Info.Height != sbBmp.Info.Height)
{
sbBmp.Unlock();
throw new Exception("Bitmap width/height are not equal to previous bitmap");
}
List <Rectangle> Blocks = new List <Rectangle>();
int index = 0;
int y = 0;
int x = 0;
Size s = new Size(bitmap.Width, CheckBlock.Height);
Size lastSize = new Size(bitmap.Width % CheckBlock.Width, bitmap.Height % CheckBlock.Height);
int lasty = bitmap.Height - lastSize.Height;
int lastx = bitmap.Width - lastSize.Width;
Rectangle cBlock = new Rectangle();
s = new Size(bitmap.Width, s.Height);
while (y != bitmap.Height)
{
if (y == lasty)
{
s = new Size(bitmap.Width, lastSize.Height);
}
cBlock = new Rectangle(0, y, bitmap.Width, s.Height);
if (onCodeDebugScan != null)
{
onCodeDebugScan(cBlock);
}
if (!SimpleBitmap.Compare(cBlock, LastFrame.Scan0_int, sbBmp.Scan0_int, sbBmp.Info))
//if (!SimpleBitmap.Compare(y, s.Height, LastFrame.Scan0_int, sbBmp.Scan0_int, sbBmp.Info))
{
index = Blocks.Count - 1;
if (Blocks.Count != 0 && (Blocks[index].Y + Blocks[index].Height) == cBlock.Y)
{
cBlock = new Rectangle(Blocks[index].X, Blocks[index].Y, Blocks[index].Width, Blocks[index].Height + cBlock.Height);
Blocks[index] = cBlock;
}
else
{
Blocks.Add(cBlock);
}
}
y += s.Height;
}
List <CacheInfo> finalUpdates = new List <CacheInfo>();
const int CheckHeight = 50;
for (int i = 0; i < Blocks.Count; i++)
{
s = new Size(CheckBlock.Width, Blocks[i].Height);
y = Blocks[i].Y;
lasty = (Blocks[i].Y + Blocks[i].Height);
while (y != lasty)
{
int ScanHeight = y + CheckHeight > lasty ? lasty - y : CheckHeight;
x = 0;
while (x != bitmap.Width)
{
if (x == lastx)
{
s = new Size(lastSize.Width, Blocks[i].Height);
}
cBlock = new Rectangle(x, y, s.Width, ScanHeight);
if (onCodeDebugScan != null)
{
onCodeDebugScan(cBlock);
}
if (!SimpleBitmap.Compare(cBlock, sbBmp.Scan0_int, LastFrame.Scan0_int, sbBmp.Info))
{
/*byte[] tempData = new byte[0];
* LastFrame.CopyBlock(cBlock, ref tempData);
* finalUpdates.Add(new CacheInfo(0, false, tempData, cBlock));*/
//hash it and see if exists in cache
hasher = new CRC32(); //re-initialize for seed
byte[] tempData = new byte[0];
LastFrame.CopyBlock(cBlock, ref tempData);
int hash = BitConverter.ToInt32(hasher.ComputeHash(tempData), 0);
if (codeCached.Count >= MaxBuffers)
{
codeCached.RemoveAt(0);
}
if (codeCached.ContainsKey(hash))
{
CachedSize += (ulong)tempData.Length;
finalUpdates.Add(new CacheInfo(hash, true, new byte[0], cBlock));
}
else
{
//nothing found in cache let's use the normal way
codeCached.Add(hash, tempData);
finalUpdates.Add(new CacheInfo(hash, false, tempData, cBlock));
}
}
x += s.Width;
}
y += ScanHeight;
}
}
for (int i = 0; i < finalUpdates.Count; i++)
{
buffer = new byte[0];
Rectangle rect = finalUpdates[i].Rect;
if (!finalUpdates[i].isCached)
{
fixed(byte *ptr = finalUpdates[i].Data)
{
using (Bitmap TmpBmp = new Bitmap(rect.Width, rect.Height, rect.Width * LastFrame.Info.PixelSize, LastFrame.bitmapData.PixelFormat, new IntPtr(ptr)))
{
buffer = base.jpgCompression.Compress(TmpBmp);
}
}
}
outStream.WriteByte(finalUpdates[i].isCached ? (byte)1 : (byte)0);
outStream.Write(BitConverter.GetBytes(finalUpdates[i].Rect.X), 0, 4);
outStream.Write(BitConverter.GetBytes(finalUpdates[i].Rect.Y), 0, 4);
outStream.Write(BitConverter.GetBytes(finalUpdates[i].Rect.Width), 0, 4);
outStream.Write(BitConverter.GetBytes(finalUpdates[i].Rect.Height), 0, 4);
outStream.Write(BitConverter.GetBytes(finalUpdates[i].Hash), 0, 4);
outStream.Write(BitConverter.GetBytes(buffer.Length), 0, 4);
outStream.Write(buffer, 0, buffer.Length);
TotalDataLength += buffer.Length + (4 * 6) + 1;
}
outStream.Position = oldPos;
outStream.Write(BitConverter.GetBytes(TotalDataLength), 0, 4);
Blocks.Clear();
SetLastFrame(sbBmp);
ms.Close();
ms.Dispose();
}
}
