IG_mpf_page_info_get

If multi-page image hMIGear is associated with an external file, then this function returns information about the page with an nPage index from the external file.

Declaration:

	Copy Code
AT_ERRCOUNT ACCUAPI IG_mpf_page_info_get_ex( HMIGEAR hMIGear, UINT nPage, LPAT_MODE lpCompression, HIGDIBINFO* lpDIB );

Arguments:

Name	Type	Description
hMIGear	HMIGEAR	Handle to allocated multi-page image.
nPage	UINT	Index of the page, starting with 0.
lpCompression	AT_MODE	Pointer indicating where to receive the compression method of the given image. It is used for constants such as IG_COMPRESSION_NONE, or IG_COMPRESSION_JPEG. A complete list of compression methods can be found in the accucnst.h file.
lpDIB	HIGDIBINFO*	Pointer indicating where to return a DIB info handle associated with the page.

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:

None

Example:

	Copy Code
HMIGEAR hMIGear; /* handle to multi-page image / AT_ERRCOUNT nErrCount; / will hold returned error count / UINT nPageCount = 0; UINT i; AT_MODE nCompression; HIGDIBINFO hDIB; char str[80]; ... / initialize multi-page image, assign it with external file */ nErrCount = IG_mpf_page_count_get( hMIGear, &nPageCount ); for( i = 0; i < nPageCount; i++) if (!nErrCnt) { nErrCnt = IG_mpf_page_info_get_ex( hMIGear, i, &nCompression, &hDIB ); if (!nErrCnt) { IG_guidlg_compression_name_get( nCompression, str, sizeof(str) ); printf( "Page %i\n Compression method: %s\n", i, str ); } }

Copy Code

HMIGEAR hMIGear;   /* handle to multi-page image  */
AT_ERRCOUNT nErrCount; /* will hold returned error count */
UINT nPageCount = 0;
UINT i;
AT_MODE nCompression;
HIGDIBINFO hDIB;
char str[80];
...
/* initialize multi-page image, assign it with external file */
nErrCount = IG_mpf_page_count_get( hMIGear, &nPageCount );
for( i = 0; i < nPageCount; i++)
if (!nErrCnt)
{
        nErrCnt = IG_mpf_page_info_get_ex( hMIGear, i, &nCompression, &hDIB );
        if (!nErrCnt)
        {
                IG_guidlg_compression_name_get( nCompression, str, sizeof(str) );
                printf( "Page %i\n  Compression method: %s\n", i, str );
        }
}

Remarks:

Pages are numbered starting with 0. If the image is not associated with an external file, then this function returns an error.