using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing.Imaging;
using System.IO;
using System.Drawing;
using System.Text.RegularExpressions;
using System.Collections;
using System.ComponentModel;
using System.Runtime.InteropServices;
namespace DocImageUtility
{
public class TIFManager
{
private string TIFF_CODEC = "image/tiff";
private long ENCODING_SCHEME = (long)EncoderValue.CompressionCCITT4;
public string SelectedPages { get; set; }
public int NumberOfPages { get; set; }
public string FilePath { get; set; }
public bool newfile = true;
public bool newdocument = true;
Image Document;
EncoderParameters encoderParams;
public int SelectedPageCount { get { return Pages.Length; } }
//First method to call in order to load the file and get its contents and pages
public void Load(string path)
{
this.FilePath = path;
//Get the frame dimension list from the image of the file and
Image tiffImage = Image.FromFile(path);
//get the globally unique identifier (GUID)
Guid objGuid = tiffImage.FrameDimensionsList[0];
//create the frame dimension
FrameDimension dimension = new FrameDimension(objGuid);
//Gets the total number of frames in the .tiff file
NumberOfPages = tiffImage.GetFrameCount(dimension);
tiffImage.Dispose();
}
//Split Method
public void Split(string splittedFileName)
{
//Get its file information
ImageCodecInfo codecInfo = GetCodecInfo(TIFF_CODEC);
EncoderParameters encoderParams = new EncoderParameters(2);
encoderParams.Param[0] = new
EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
encoderParams.Param[1] = new
EncoderParameter(System.Drawing.Imaging.Encoder.Quality, ENCODING_SCHEME);
//Load the Document
FileStream fs = new FileStream(this.FilePath, FileMode.OpenOrCreate);
Image image = Image.FromStream(fs);
//Get file frame/pages
FrameDimension frameDim = new FrameDimension(image.FrameDimensionsList[0]);
//Check if selected pages is null or 0 value
if (SelectedPages != null)
{
// Delete / Overwrite existing file if updating Splitted Image File
var file = new FileInfo(splittedFileName);
if (file.Exists) file.Delete();
//for each frame/pages create the new document
for (int i = 0; i < Pages.Length; i++)
{
//check whether selected pages is not greater than the file pages
if (Pages.Length >= (i + 1))
{
//Selected image frame
image.SelectActiveFrame(frameDim, Pages[i]);
//check whether file is new document
if (newfile == true)
{
image.Save(splittedFileName, codecInfo, encoderParams);
newfile = false;
}
else
//append the document depending on the selected frame from the original image
{
encoderParams.Param[0] = new
EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag,
(long)EncoderValue.FrameDimensionPage);
image.SaveAdd(image, encoderParams);
}
}
}
fs.Close();
}
}
//Merge Method
public void Merge(string MergeFileName, string source)
{
//Set its Image Format as TIFF
ImageCodecInfo codecInfo = GetCodecInfo(TIFF_CODEC);
//Load the Document
FileStream fs = new FileStream(source, FileMode.OpenOrCreate);
Image image = Image.FromStream(fs);
//Get file frame/pages
FrameDimension frameDim = new FrameDimension(image.FrameDimensionsList[0]);
if (newdocument == true)
{
//Set its Image Type
encoderParams = new EncoderParameters(2);
encoderParams.Param[0] = new
EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag,
(long)EncoderValue.MultiFrame);
encoderParams.Param[1] = new
EncoderParameter(System.Drawing.Imaging.Encoder.Quality, ENCODING_SCHEME);
//Check if selected pages is null or 0 value
if (SelectedPages != null)
{
//for each frame/pages create the new document
for (int i = 0; i < image.GetFrameCount(frameDim); i++)
{
//check whether selected pages is not greater than the file pages
if (Pages.Length >= (i + 1))
{
//Selected image frame
image.SelectActiveFrame(frameDim, Pages[i]);
//check whether file is new document
if (newfile == true)
{
//create new filename
Document = image;
//save
Document.Save(MergeFileName, codecInfo, encoderParams);
encoderParams.Param[0] =
new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag,
(long)EncoderValue.FrameDimensionPage);
newfile = false;
newdocument = false;
}
else
{
//append the document depending on the selected frame from the original image
Document.SaveAdd(image, encoderParams);
}
}
}
fs.Close();
}
}
else
{
//Check if selected pages is null or 0 value
if (SelectedPages != null)
{
//for each frame/pages create the new document
for (int i = 0; i < image.GetFrameCount(frameDim); i++)
{
//check whether selected pages is not greater than the file pages
if (Pages.Length >= (i + 1))
{
//Selected image frame
image.SelectActiveFrame(frameDim, Pages[i]);
//check whether file is new document
//append the document depending on the selected frame from the original image
Document.SaveAdd(image, encoderParams);
}
}
fs.Close();
}
}
}
//Check whether selected pages is valid
public int[] Pages
{
get
{
ArrayList ps = new ArrayList();
string[] ss = SelectedPages.Split(new char[] { ',', ' ', ';' });
foreach (string s in ss)
if (Regex.IsMatch(s, @"\d+-\d+"))
{
int start = int.Parse(s.Split(new char[] { '-' })[0]);
int end = int.Parse(s.Split(new char[] { '-' })[1]);
if (start > end)
return new int[] { 0 };
while (start <= end)
{
ps.Add(start - 1);
start++;
}
}
else
{
int i;
int.TryParse(s, out i);
if (i > 0)
ps.Add(int.Parse(s) - 1);
}
return ps.ToArray(typeof(int)) as int[];
}
}
private ImageCodecInfo GetCodecInfo(string codec)
{
ImageCodecInfo codecInfo = null;
foreach (ImageCodecInfo info in ImageCodecInfo.GetImageEncoders())
{
if (info.MimeType == codec)
{
codecInfo = info;
break;
}
}
return codecInfo;
}
}
}
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