QuickTime 4 Reference

MIME Type List

The GraphicsImportGetMIMETypeList function returns a list of the MIME types supported by a graphics importer component. This list is contained in the QT atom container described in this section. For more information about QT atom containers, see QuickTime 4 Reference.

At the top level of the atom container are three atoms for each supported MIME type. The atoms whose IDs are 1 describe the first supported MIME type, the atoms whose IDs are 2 describe the second supported MIME type, and so on. Note that the IDs have to be consecutive.

An atom of type kMimeInfoMimeTypeTag contains a string that identifies the MIME type, such as image/jpeg or image/x-jpeg .
The atom of type kMimeInfoFileExtensionTag contains a string that specifies likely file extensions for files of this MIME type, such as jpg , jpe , and jpeg . If there is more than one extension, the extensions are separated by commas.
The atom of type kMimeInfoDescriptionTag contains a string describing the MIME type for end users, such as JPEG Image . These are neither Pascal nor C strings--just ASCII characters.

Figure 16-4 illustrates a MIME type list.

Figure 4 A MIME type list