public bool Decode(ref int address, ref int bufSize, mDecoders method)
{
byte[] buf;
byte[] bufIn = new byte[bufSize];
if (mAllocAddr != 0) ReleaseMem();
try
{
Marshal.Copy((IntPtr)address, bufIn, 0, bufSize);
if (DebugMode) MessageBox.Show("itf> Received Data size: " + bufIn.Length.ToString("X") + "Data:\n\n" + HexDumper.HexDump(bufIn));
switch (method)
{
case mDecoders.FlateDecode: buf = ByteDecoder.FlateDecode(bufIn, true); break;
case mDecoders.ASCIIHexDecode: buf = ByteDecoder.ASCIIHexDecode(bufIn); break;
case mDecoders.ASCII85Decode: buf = ByteDecoder.ASCII85Decode(bufIn); break;
case mDecoders.LzwDecode: buf = ByteDecoder.LzwDecode(bufIn); break;
case mDecoders.RunLengthDecode: buf = ByteDecoder.RunLengthDecode(bufIn); break;
case mDecoders.DecodePredictor: buf = ByteDecoder.DecodePredictor(bufIn, mpredictor, mcolumns, mcolors, mbitspercomponent); break;
case mDecoders.CCITTFaxDecode: buf = ByteDecoder.FaxDecode(bufIn, mcolumns, mrows, mk, mencoded_byte_align, mblack_is1); break;
default:
mErrorMessage = "Unknown decode method: " + method ;
return false;
}
if (buf.Length == 0)
{
mErrorMessage = "iText_Filters Error: decoded buffer length=0";
return false;
}
if (DebugMode) MessageBox.Show("itf> ByteDecoder output size: " + buf.Length.ToString("X") + "Data:\n\n" + HexDumper.HexDump(buf));
mAllocSize = buf.Length;
mAllocAddr = (int)Marshal.AllocHGlobal(mAllocSize);
Marshal.Copy(buf, 0, (IntPtr)mAllocAddr, mAllocSize);
address = mAllocAddr; //these are byref so we pass back the new memory address and size like this
bufSize = mAllocSize;
return true;
}
catch (Exception e)
{
if (DebugMode) MessageBox.Show("itf> Exception Caught: " + e.ToString() );
mErrorMessage = "iText_Filters Error: Caught Exception: " + e.ToString();
return false;
}
}
public bool Decode(ref int address, ref int bufSize, mDecoders method)
{
byte[] buf;
byte[] bufIn = new byte[bufSize];
if (mAllocAddr != 0)
{
ReleaseMem();
}
try
{
Marshal.Copy((IntPtr)address, bufIn, 0, bufSize);
if (DebugMode)
{
MessageBox.Show("itf> Received Data size: " + bufIn.Length.ToString("X") + "Data:\n\n" + HexDumper.HexDump(bufIn));
}
switch (method)
{
case mDecoders.FlateDecode: buf = ByteDecoder.FlateDecode(bufIn, true); break;
case mDecoders.ASCIIHexDecode: buf = ByteDecoder.ASCIIHexDecode(bufIn); break;
case mDecoders.ASCII85Decode: buf = ByteDecoder.ASCII85Decode(bufIn); break;
case mDecoders.LzwDecode: buf = ByteDecoder.LzwDecode(bufIn); break;
case mDecoders.RunLengthDecode: buf = ByteDecoder.RunLengthDecode(bufIn); break;
case mDecoders.DecodePredictor: buf = ByteDecoder.DecodePredictor(bufIn, mpredictor, mcolumns, mcolors, mbitspercomponent); break;
case mDecoders.CCITTFaxDecode: buf = ByteDecoder.FaxDecode(bufIn, mcolumns, mrows, mk, mencoded_byte_align, mblack_is1); break;
default:
mErrorMessage = "Unknown decode method: " + method;
return(false);
}
if (buf.Length == 0)
{
mErrorMessage = "iText_Filters Error: decoded buffer length=0";
return(false);
}
if (DebugMode)
{
MessageBox.Show("itf> ByteDecoder output size: " + buf.Length.ToString("X") + "Data:\n\n" + HexDumper.HexDump(buf));
}
mAllocSize = buf.Length;
mAllocAddr = (int)Marshal.AllocHGlobal(mAllocSize);
Marshal.Copy(buf, 0, (IntPtr)mAllocAddr, mAllocSize);
address = mAllocAddr; //these are byref so we pass back the new memory address and size like this
bufSize = mAllocSize;
return(true);
}
catch (Exception e)
{
if (DebugMode)
{
MessageBox.Show("itf> Exception Caught: " + e.ToString());
}
mErrorMessage = "iText_Filters Error: Caught Exception: " + e.ToString();
return(false);
}
}
