This function returns the callback functions that ImageGear uses to pass or receive metadata during save and load operations.
Declaration:
 Copy Code |
|
|---|---|
AT_ERRCODE ACCUAPI IG_fltr_metad_callback_get( LPVOID * lpPrivate, LPAFT_IG_METAD_ITEM_SET_CB * lplpfnSetCB, LPAFT_IG_METAD_ITEM_ADD_CB * lplpfnAddCB, LPAFT_IG_METAD_ITEM_GET_CB * lplpfnGetCB ); |
|
Arguments:
| lpPrivate | Returns private data associated with metadata callback functions. |
| lplpfnSetCB | Returns pointer to callback function of type LPAFT_IG_METAD_ITEM_SET_CB that is used for Set metadata operation. |
| lplpfnAddCB | Returns pointer to callback function of type LPAFT_IG_METAD_ITEM_ADD_CB that is used for Add metadata operation. |
| lplpfnGetCB | Returns pointer to callback function of type LPAFT_IG_METAD_ITEM_GET_CB that is used for Get metadata operation. |
Return Value:
Returns 0 if successful. Otherwise, returns the number of ImageGear errors that occurred during this function call.Supported Raster Image Formats:
This function does not process image pixels.
Sample:
See GUI component source code.
Example:
| Copy Code |
|
|---|---|
AT_ERRCOUNT nErrcount; // Count of returned errors on stack LPVOID lpPrivate; LPAFT_IG_METAD_ITEM_SET_CB lpfnSetCB; LPAFT_IG_METAD_ITEM_ADD_CB lpfnAddCB; LPAFT_IG_METAD_ITEM_GET_CB lpfnGetCB; // Get metadata callback functions nErrcount = IG_fltr_metad_callback_get(&lpPrivate, &lpfnSetCB, &lpfnAddCB, &lpfnGetCB); |
|
Remarks:
A NULL value is valid for any parameter, if the corresponding information is not necessary to the application.
See also IG_fltr_metad_callback_set, LPAFT_IG_METAD_ITEM_ADD_CB, LPAFT_IG_METAD_ITEM_GET_CB, LPAFT_IG_METAD_ITEM_SET_CB functions and the section Processing of non-image data through filter callback functions.