/* CHAPTER 16. Optional Content Groups */

/* Begin retrieving optional content group names. The serial number 0..<n - 1>
 * is returned. */
int cpdf_startGetOCGList(int pdf);

/* Retrieve an OCG name, given its serial number 0..<n - 1>. */
char *cpdf_OCGListEntry(int i);

/* End retrieval of optional content group names. */
void cpdf_endGetOCGList(void);

/* cpdf_OCGRename(pdf, from, to) will rename an optional content group. */
void cpdf_OCGRename(int, const char[], const char[]);

/* Ensure that every optional content group appears in the OCG order list. */
void cpdf_OCGOrderAll(int);

/* Coalesce optional content groups. For example, if we merge or stamp two
 * files both with an OCG called "Layer 1", we will have two different optional
 * content groups. This function will merge the two into a single optional
 * content group. */
void cpdf_OCGCoalesce(int);