ImageGear Professional for Windows ActiveX
GIF Non-image Data Structure
| ImageGear Professional v18.2 > User Guide > Appendices/General Reference > Non-Image Data Storage > Non-Image Data Structure > GIF Non-image Data Structure |
GIF file format is complex and has non-image data of different levels that can be stored before and after an image data. The GIF metadata design allows to read/write any GIF non-image data and prevents from misunderstanding with GIF extensions storing order.
The following metadata are always saved before an image data:
The metadata of GIF extensions that are inside GIF Extensions After Image level (between items with Name "AfterImageExtensions" and Id 0xFFF (Type LEVEL_START and LEVEL_END)) are saved after an image data.
All other GIF Extensions Metadata are saved before an image data.
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You can work with GIF metadata only when the ImageGear GIF/TIFF-LZW Component is attached to the core ImageGear module. |