ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Multi Page Image File Functions > 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.


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        [IN] HMIGEAR  hMIGear, 
        [IN] UINT nPage,
        [OUT] LPAT_MODE lpCompression,
        [OUT] LPAT_DIB lpDib


Name Type Description
hMIGear HMIGEAR The handle to allocated the multi-page image.
nPage UINT Index of the page, starting with 0.
lpCompression LPAT_MODE Far 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 LPAT_DIB The far pointer indicating where to return a DIB 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:

Indexed RGB – 1, 4, 8 bpp;
Grayscale – 9…16 bpp;
RGB – 24 bpp;
CMYK – 32 bpp.

This function is only kept for backward compatibility reasons. Please use IG_mpf_page_info_get_ex instead.


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HMIGEAR hMIGear;   /* handle to multi-page image  */
AT_ERRCOUNT nErrCount = IGE_SUCCESS; /* will hold returned error count */
UINT nPageCount = 0;
AT_MODE                 nCompression;
AT_DIB          Dib;
char str[80];
/* initialize multi-page image and 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( hMIGear, i, &nCompression, &Dib );
        if (!nErrCnt)
        IG_guidlg_compression_name_get( nCompression, str, sizeof(str) );
        printf( "Page %i\n  Compression method: %s\n", i, str );


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

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