Properties · Methods · Demos · Examples

Declaration

TIETIFFHandler = class;

Description

This class allows you to read all TIFF tags, edit/add tags and pages, delete pages, and finally save back the modified TIFF. TIETIFFHandler is an older class, so you may find it easier to work with TIEMultiBitmap.
Because it only loads pages as needed, it offers good performance when working very large TIFF files.

Note:
◼TIETIFFHandler does not allow a Little-Endian frames to be inserted into a Big-Endian file. An exception will be raised upon insertion
◼TIETIFFHandler does not support the BigTIFF format. An exception will be raised if you try to open a BigTiff file
◼It also does not support some old tiff files that use "Old-JPEG" compression (which is no longer supported by the TIFF standard)

Multiframe TIFF Editing

There are three methods to manipulate multiframe TIFFs (add, delete pages, etc) with ImageEn:

◼TIEMultiBitmap or TImageEnMView
Load the TIFF into the TIEMultiBitmap, add, delete and move pages, then save. This method offers the most flexibility and compression options, but will be slow with large TIFF files.

◼TIETIFFHandler
Load the TIFF into the TIETIFFHandler, add, delete and move pages, then save. This method works well with large files, but does not support the BigTIFF format.

◼Direct File Manipulation
If you are only performing adhoc changes to TIFF content, you may prefer to directly modify the file or stream using global methods or TImageEnIO functions.
Add pages using InsertTIFFImageFile or TImageEnIO.InsertToFileTIFF, and delete pages with DeleteTIFFIm.

Note: To quickly display the content of a large TIFF file in a TImageEnMView, load it on demand

Demo

	Demos\InputOutput\TiffHandler\TiffHandler.dpr
	Demos\InputOutput\TiffHandler2\TiffHandler2.dpr

Examples

// add a custom tag (65000 with 'Hello World') at page 0
mytif := TIETIFFHandler.Create('input.tif');
mytif.SetValue(0, 65000, ttAscii, 'Hello World!');
mytif.WriteFile('output.tif');
mytif.free;

// delete second page (indexed 1) of a multipage tiff
mytif := TIETIFFHandler.Create('input.tif');
mytif.DeletePage(1);
mytif.WriteFile('output.tif');
mytif.free;

// insert a new page from an external file
mytif := TIETIFFHandler.Create('input.tif');
mytif.InsertPageAsFile('external.jpg', 0);
mytif.WriteFile('output.tif');
mytif.free;

// merge two tiff (even they are multipage files..)
mytif := TIETIFFHandler.Create('input-1.tif');
mytif.InsertTIFFFile('input-2.tif', mytif.PagesCount-1);
mytif.WriteFile('output.tif');
mytif.free;

// read tag 305 ('software')
mytif := TIETIFFHandler.Create('input-1.tif');
software := mytif.GetString(0, mytif.FindTag(0, 305));
mytif.free;

Methods and Properties

General

Input/Output

Meta Information

Tag Information

Tag Reading

Tag Writing

Tag Copying

Page Handling

Events

---