2 * Copyright (c) 2005, Herve Drolon, FreeImage Team
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30 @brief Implementation of a event callback system
32 The functions in EVENT.C have for goal to send output messages (errors, warnings, debug) to the user.
35 Message handler object
40 <li>Debugging messages
43 //typedef struct opj_event_mgr
45 // /** Data to call the event manager upon */
46 // void * m_error_data;
47 // /** Data to call the event manager upon */
48 // void * m_warning_data;
49 // /** Data to call the event manager upon */
50 // void * m_info_data;
51 // /** Error message callback if available, NULL otherwise */
52 // opj_msg_callback error_handler;
53 // /** Warning message callback if available, NULL otherwise */
54 // opj_msg_callback warning_handler;
55 // /** Debug message callback if available, NULL otherwise */
56 // opj_msg_callback info_handler;
59 #define EVT_ERROR 1 /**< Error event type */
60 #define EVT_WARNING 2 /**< Warning event type */
61 #define EVT_INFO 4 /**< Debug event type */
63 /** @defgroup EVENT EVENT - Implementation of a event callback system */
66 /** @name Exported functions (see also openjpeg.h) */
68 /* ----------------------------------------------------------------------- */
70 Write formatted data to a string and send the string to a user callback.
71 @param cinfo Codec context info
72 @param event_type Event type or callback to use to send the message
73 @param fmt Format-control string (plus optional arguments)
74 @return Returns true if successful, returns false otherwise
75 * FIXME Change by its v2 version this function after ended the merge
77 opj_bool opj_event_msg(opj_common_ptr cinfo, int event_type, const char *fmt, ...);
79 /* ----------------------------------------------------------------------- */
82 * Write formatted data to a string and send the string to a user callback.
84 * @param event_mgr Event handler
85 * @param event_type Event type or callback to use to send the message
86 * @param fmt Format-control string (plus optional arguments)
88 * @return Returns true if successful, returns false otherwise
90 opj_bool opj_event_msg_v2(opj_event_mgr_t* event_mgr, int event_type, const char *fmt, ...);
91 /* ----------------------------------------------------------------------- */
94 * Set the event manager with the default callback function for the 3 levels.
96 void opj_set_default_event_handler(opj_event_mgr_t * p_manager);
102 #endif /* __EVENT_H */