void (*set_parameter)(struct _gfxdocument*gfx, const char*name, const char*value);
char* (*getinfo)(struct _gfxdocument*gfx, const char*key);
struct _gfxpage* (*getpage)(struct _gfxdocument*gfx, int page);
void (*set_parameter)(struct _gfxdocument*gfx, const char*name, const char*value);
char* (*getinfo)(struct _gfxdocument*gfx, const char*key);
struct _gfxpage* (*getpage)(struct _gfxdocument*gfx, int page);