ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > ART Component API Reference > ART Component Functions Reference > Mark Management Functions > ART_mark_query

This function queries a mark for its attributes that are stored in the structure ART_MARK_ATTRIBUTES.


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AT_ERRCOUNT ART_mark_query(
        HIGEAR hIGear, 
        ART_MARK_INDEX hMarkIndex, 


Name Type Description
hIGear HIGEAR HIGEAR handle to the image.
hMarkIndex ART_MARK_INDEX Mark identifier.
lpMarkAttr LPART_MARK_ATTRIBUTES Mark description.

Return Value:

Returns the number of ImageGear errors that occurred during the function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.


Copy Code
HIGEAR  hIGear; /* HIGEAR handle of image */
AT_ERRCOUNT  nErrcount; /* tally of IG errors on  */
/* the stack   */
ART_MARK_INDEX hMarkIndex; /* index to the mark  */
/* being queried  */
ART_MARK_ATTRIBUTES ma ; /* structure holding the  */
/* mark's attributes  */
UINT arrowCount;  /* number of arrow marks  */
/* assoc. with image  */
/* Get index of first mark created */
ART_mark_first(hIGear, &hMarkIndex, NULL);
/* While there are valid index number, iterate through them and keep count of any arrow
marks associated with the image */
while (hMarkIndex != ART_INVALID_ID)
nErrcount = ART_mark_query(hIGear, hMarkIndex, &ma);
if (ma.dwType = 506)
   nErrcount = ART_mark_next(hIGear,&HMarkIndex,NULL);


The attributes for the mark associated with hMarkIndex are copied into lpMarkAttr, and can then be examined. To bring a particular mark to the front of the stacking order, use ART_mark_bring_to_front().

An error is set if any of the following conditions are met:

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