//Find the location in the file for Photometric in IFD 1
public static void FlipPageOne(string inPath, string outPath)
{
var bytesFile = FileHandler.ReadFile(inPath);
var hexFile = TagReader.ByteToHexArray(bytesFile);
var tagReader = new TagReader(hexFile);
var header = tagReader.ReadHeader();
var IFD = tagReader.ReadIfD(hexFile, header[2]);
//Flip it - IntTag - IFD.Entries[4].IntIFDValueOffset
var byteToFlip = 0;
var bytevalue = 0;
foreach (var entry in IFD.Entries)
{
if (entry.IntTag == 262)
{
byteToFlip = entry.IntIFDValueOffset;
}
}
if (bytesFile[byteToFlip] == 0)
{
bytesFile[byteToFlip] = 1;
}
if (bytesFile[byteToFlip] == 1)
{
bytesFile[byteToFlip] = 0;
}
//ReRead it
hexFile = TagReader.ByteToHexArray(bytesFile);
tagReader = new TagReader(hexFile);
header = tagReader.ReadHeader();
tagReader.ReadIfD(hexFile, header[2]);
FileHandler.WriteFile(outPath, bytesFile);
Console.ReadKey();
}
public void ConvertToSinglePage(string inPath, string outPath)
{
var bytesFile = FileHandler.ReadFile(inPath);
var hexFile = TagReader.ByteToHexArray(bytesFile);
var tagReader = new TagReader(hexFile);
var header = tagReader.ReadHeader();
var IFD = tagReader.ReadIfD(hexFile, header[2]);
var ifdSize = 2 + IFD.EntryCount * 12 + 4;
var offsetOfNextOffset = Convert.ToInt32(header[2], 16) + ifdSize - 4;
var zeroWord = new byte[] { 0, 0, 0, 0 };
Array.Copy(zeroWord, 0, bytesFile, offsetOfNextOffset, 4);
//write out new file
FileHandler.WriteFile(outPath, bytesFile);
Console.ReadKey();
}
public void MoveFirstIfdtoEOF(string inPath, string outPath)
{
var bytesFile = FileHandler.ReadFile(inPath);
var hexFile = TagReader.ByteToHexArray(bytesFile);
var tagReader = new TagReader(hexFile);
var header = tagReader.ReadHeader();
var IFD = tagReader.ReadIfD(hexFile, header[2]);
//An Image File Directory (IFD) consists of a 2-byte count of the number of directory
//entries (i.e., the number of fields), followed by a sequence of 12-byte field
//entries, followed by a 4-byte offset of the next IFD (or 0 if none). (Do not forget to
//write the 4 bytes of 0 after the last IFD.)
var IFDSize = 2 + IFD.EntryCount * 12 + 4;
var rawIFD = new byte[IFDSize];
Array.Copy(bytesFile, Convert.ToInt32(header[2], 16), rawIFD, 0, IFDSize);
var newFileBytes = new byte[bytesFile.Length + IFDSize];
Array.Copy(bytesFile, 0, newFileBytes, 0, bytesFile.Length);
Array.Copy(rawIFD, 0, newFileBytes, bytesFile.Length, rawIFD.Length);
//change bytes 4-7 of newfile byte array to be the length of the original bytesfile
var newOffset = IntToLittleEndian4(bytesFile.Length);
Array.Copy(newOffset, 0, newFileBytes, 4, 4);
//check the copy has worked
hexFile = TagReader.ByteToHexArray(newFileBytes);
tagReader = new TagReader(hexFile);
header = tagReader.ReadHeader();
var newIFD = tagReader.ReadIfD(hexFile, header[2]);
//write out new file
FileHandler.WriteFile(outPath, newFileBytes);
Console.ReadKey();
}
