PNG has MMX optimized code for loading and saving files, and it supports comments. Comments can be saved when saving a PNG file, but comments inside existing files cannot be updated. The following comments are supported:
Value | Meaning |
|---|---|
RasterCommentMetadataType.Artist | Person who created the image. |
RasterCommentMetadataType.Copyright | Copyright notice. |
RasterCommentMetadataType.DateTime | Date and time (YYYY:MM:DD HH:MM:SS). The field length is 20, counting the NULL terminator. |
RasterCommentMetadataType.Description | Description of the image. |
Manufacturer of the equipment used to create the image. | |
Title of the image. | |
RasterCommentMetadataType.Software NOTE: If you are using the Nag version of Leadtools.dll, this comment is fixed and cannot be changed. | Name and version of software package used to create the image. |
RasterCommentMetadataType.Disclaimer | String containing the disclaimer of the software used to create the image. |
RasterCommentMetadataType.Warning | Warning statement associated with the software that created the image. |
Miscellaneous information. |
For more information about file comments, refer to RasterCodecs.ReadComment and RasterCodecs.WriteComment.