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

This function gets the block name of the named block that follows the one that was last passed into lpBlockName.


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AT_ERRCOUNT ART_mark_block_next(
        HIGEAR hIGear, 
        ART_MARK_INDEX hMarkIndex, 
        LPART_BLOCK_NAME lpBlockName


Name Type Description
hIGear HIGEAR HIGEAR handle to the image.
hMarkIndex ART_MARK_INDEX Mark identifier.
lpBlockName LPART_BLOCK_NAME A far pointer to an 8-byte array of memory that returns the type of block of the mark referenced by hMarkIndex. The block type is either an ART-defined constant beginning with ART_BLOCK or a user-defined block. See ARTAPI.H for the full list of ART-defined constants.

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++.


See example under ART_mark_block_first() function.


ART_mark_block_first() is called to get the first block name. The block data for the named block is retrieved by calling ART_mark_block_query(). Both ART_mark_block_next() and ART_mark_block_first() set lpBlockName to zero when there are no more blocks (providing you an easy way to know when to end your loop). Block names are returned in no particular order.

To get the mark index needed for this function, you can call any of ART's functions that return a mark index, for example: ART_mark_first().
Many of ART's callback functions include the index number as a parameter. As part of your callback function, you can call ART_mark_block_first() and ART_mark_block_next() using the passed mark index.

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

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