Finding Out About Image Formats 17

These functions return information about the image format supported by a graphics exporter. Format-specific exporters must implement all three of these calls.

GraphicsExportGetDefaultFileTypeAndCreator

Returns the suggested file type and creator.



 
pascal ComponentResult GraphicsExportGetDefaultFileTypeAndCreator (GraphicsExportComponent ci,

                                          OSType *fileType,

                                          OSType *fileCreator);

ci: Specifies the component instance that identifies your connection to the graphics exporter component.
fileType: Points to a location to receive the suggested file type for the image file format. If you do not need this information, pass nil .
fileCreator: Points to a location to receive the suggested file creator for the new image file format. If you do not need this information, pass nil .

GraphicsExportGetDefaultFileNameExtension

Returns the suggested file name extension.



 
pascal ComponentResult GraphicsExportGetDefaultFileNameExtension ( GraphicsExportComponent ci,

                                         OSType *fileNameExtension);

ci: Specifies the component instance that identifies your connection to the graphics exporter component.
fileNameExtension: Points to a location to receive the file name extension.

DISCUSSION

File name extensions are returned as upper-case big-endian four-character-codes. For example, the extension ".png " would be returned as 'PNG' (0x504E4720).

GraphicsExportGetMIMETypeList

Returns MIME types and other information about the graphics format.



 
pascal ComponentResult GraphicsExportGetMIMETypeList (GraphicsExportComponent ci,

                     void *qtAtomContainerPtr);

ci: Specifies the component instance that identifies your connection to the graphics exporter component.
qtAtomContainerPtr: Receives a newly-created QuickTime atom container that contains information about the graphics format.

DISCUSSION

This function creates and returns a QuickTime atom container that contains the following information about the graphics format:

The format's name, as a string in an atom of type kMimeInfoDescriptionTag .
Optionally, the MIME type, as a string in an atom of type kMimeInfoMimeTypeTag .

RESULT CODES

`noErr`	0	No error
`paramErr`	-50	Invalid parameter specified
`memFullErr`	-108	Not enough memory available