IG_mpi_page_count

IG_mpi_page_count_set

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This function sets the size of the page array of a valid multi-page image.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_mpi_page_count_set( [IN] HMIGEAR hMIGear, [IN] UINT nPageCount );

Arguments:

Name	Type	Description
hMIGear	HMIGEAR	The handle to the allocated multi-page image.
nPageCount	UINT	The new number of pages.

Return Value:

Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.

Supported Raster Image Formats:

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

Sample:

MFC Multipage

Example:

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HMIGEAR hMIGear; /* handle to multi-page image / AT_ERRCOUNT nErrCount = IGE_SUCCESS; / will hold returned error count / UINT nPageCount = 0; / number of pages that should get from multi-page image / UINT i, ... / initialize of multi-page image and assign it with external file */ nErrCount = IG_mpi_page_count_get( hMIGear, &nPageCount ); if (!nErrCount) { i = 0; while( !IG_mpi_page_is_valid(hMIGear, nPageCount - i - 1 ) && (i < nPageCount) ) i++; } if (!nErrCount) nErrCount = IG_mpi_page_count_set( hMIGear, nPageCount - i ); }

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HMIGEAR hMIGear;       /* handle to multi-page image */
AT_ERRCOUNT nErrCount = IGE_SUCCESS; /* will hold returned error count */
UINT nPageCount = 0; /* number of pages that should get from multi-page image */
UINT i,
 ...
/* initialize of multi-page image and assign it with external file */
nErrCount = IG_mpi_page_count_get( hMIGear, &nPageCount );
if (!nErrCount)
{
        i = 0;
        while( !IG_mpi_page_is_valid(hMIGear, nPageCount - i - 1 ) && (i < nPageCount) )
                i++;
        }
        if (!nErrCount)
                nErrCount = IG_mpi_page_count_set( hMIGear, nPageCount - i );
}

Remarks:

If the size is increased, then new pages are initialized with a default value of NULL. If the array is reduced, then the removed pages are not deleted with the function IG_image_delete(). This function applies only to the image, but does not affect the associated file. The number of pages is not changed.

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