getting a page from a PDF with core

Hi all,

I'd like to open a PDF (or some other multi-page image type) with Core
and get a specific page. I can append a [number] to the filename, of
course, but I'd like to be able to do this with a memory buffer as
well, where no filename is around, and it would "feel" better to do it
with an int rather than setting a string.

I found the ->scene member, which seems to be what Wand uses, but I
can't get it to work. This test program seems to always render the
whole PDF and then pick out page zero:

-----------------------
/* compile with

   gcc -g -Wall magick.c `pkg-config GraphicsMagick --cflags --libs`

 */

#include <string.h>
#include <stdlib.h>

#include <magick/api.h>

int
main( int argc, char **argv )
{
        ImageInfo *image_info;
        Image *image;
        ExceptionInfo exception;

        InitializeMagick( NULL );

        GetExceptionInfo( &exception );
        image_info = CloneImageInfo( NULL );
        strncpy( image_info->filename, argv[1], MaxTextExtent );

        if( !(image = ReadImage( image_info, &exception )) ) {
                CatchException( &exception );
                return -1;
        }

        image->scene = atoi( argv[2] );

        strncpy( image->filename, argv[3], MaxTextExtent );

        if( !WriteImage( image_info, image ) ) {
                CatchException( &exception );
                return -1;
        }

        DestroyImage( image );
        DestroyImageInfo( image_info );
        DestroyMagick();

        return 0;
}
--------------

Ideally I'd like something that worked with current IM as well as GM.
I can dream!

John

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