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#ifndef MUPDF_FITZ_META_H
#define MUPDF_FITZ_META_H
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
#include "mupdf/fitz/document.h"
/*
fz_meta: Perform a meta operation on a document.
(In development - Subject to change in future versions)
Meta operations provide a way to perform format specific
operations on a document. The meta operation scheme is
designed to be extensible so that new features can be
transparently added in later versions of the library.
doc: The document on which to perform the meta operation.
key: The meta operation to try. If a particular operation
is unsupported on a given document, the function will return
FZ_META_UNKNOWN_KEY.
ptr: An operation dependent (possibly NULL) pointer.
size: An operation dependent integer. Often this will
be the size of the block pointed to by ptr, but not always.
Returns an operation dependent value; FZ_META_UNKNOWN_KEY
always means "unknown operation for this document". In general
FZ_META_OK should be used to indicate successful operation.
*/
int fz_meta(fz_document *doc, int key, void *ptr, int size);
enum
{
FZ_META_UNKNOWN_KEY = -1,
FZ_META_OK = 0,
/*
ptr: Pointer to block (uninitialised on entry)
size: Size of block (at least 64 bytes)
Returns: Document format as a brief text string.
All formats should support this.
*/
FZ_META_FORMAT_INFO = 1,
/*
ptr: Pointer to block (uninitialised on entry)
size: Size of block (at least 64 bytes)
Returns: Encryption info as a brief text string.
*/
FZ_META_CRYPT_INFO = 2,
/*
ptr: NULL
size: Which permission to check
Returns: 1 if permitted, 0 otherwise.
*/
FZ_META_HAS_PERMISSION = 3,
FZ_PERMISSION_PRINT = 0,
FZ_PERMISSION_CHANGE = 1,
FZ_PERMISSION_COPY = 2,
FZ_PERMISSION_NOTES = 3,
/*
ptr: Pointer to block. First entry in the block is
a pointer to a UTF8 string to lookup. The rest of the
block is uninitialised on entry.
size: size of the block in bytes.
Returns: 0 if not found. 1 if found. The string
result is copied into the block (truncated to size
and NULL terminated)
*/
FZ_META_INFO = 4,
};
#endif
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