// Decide whether to emit a trace or warning message.
// msg_level is one of:
// -1: recoverable corrupt-data warning, may want to abort.
// 0: important advisory messages (always display to user).
// 1: first level of tracing detail.
// 2,3,...: successively more detailed tracing messages.
// An application might override this method if it wanted to abort on warnings
// or change the policy about which messages to display.
static void emit_message(jpeg_common cinfo, int msg_level)
{
jpeg_error_mgr err = cinfo.err;
if (msg_level < 0)
{
// It's a warning message. Since corrupt files may generate many warnings,
// the policy implemented here is to show only the first warning,
// unless trace_level >= 3.
if (err.num_warnings == 0 || err.trace_level >= 3)
{
err.output_message(cinfo);
}
// Always count warnings in num_warnings.
err.num_warnings++;
}
else
{
// It's a trace message. Show it if trace_level >= msg_level.
if (err.trace_level >= msg_level)
{
err.output_message(cinfo);
// Create the message and Send it to Debug Console, adding a newline
//Debug.WriteLine(cinfo.err.format_message(cinfo));
}
}
}
// Format a message string for the most recent JPEG error or message.
// The message is stored into buffer, which should be at least JMSG_LENGTH_MAX
// characters. Note that no '\n' character is added to the string.
// Few applications should need to override this method.
static string format_message(jpeg_common cinfo)
{
jpeg_error_mgr err = cinfo.err;
int msg_code = err.msg_code;
string msgtext = null;
// Look up message string in proper table
if (msg_code > 0 && msg_code <= err.last_jpeg_message)
{
msgtext = err.jpeg_message_table[msg_code];
}
else if (err.addon_message_table != null && msg_code >= err.first_addon_message && msg_code <= err.last_addon_message)
{
msgtext = err.addon_message_table[msg_code - err.first_addon_message];
}
// Defend against bogus message number
if (msgtext == null)
{
err.msg_parm[0] = msg_code;
msgtext = err.jpeg_message_table[0];
}
// Format the message into the passed buffer
return(string.Format(msgtext, err.msg_parm));
}
// Default error-management setup
// Fill in the standard error-handling methods in a jpeg_error_mgr object.
// Typical call is:
// jpeg_compress cinfo=new jpeg_compress();
// jpeg_error_mgr err=new jpeg_error_mgr();
//
// cinfo.err=libjpeg.jpeg_std_error(err);
// after which the application may override some of the methods.
public static jpeg_error_mgr jpeg_std_error(jpeg_error_mgr err)
{
err.error_exit = error_exit;
err.emit_message = emit_message;
err.output_message = output_message;
err.format_message = format_message;
err.reset_error_mgr = reset_error_mgr;
err.trace_level = 0; // default = no tracing
err.num_warnings = 0; // no warnings emitted yet
err.msg_code = 0; // may be useful as a flag for "no error"
// Initialize message table pointers
err.jpeg_message_table = jpeg_std_message_table;
err.last_jpeg_message = (int)J_MESSAGE_CODE.JMSG_LASTMSGCODE - 1;
err.addon_message_table = null;
err.first_addon_message = 0; // for safety
err.last_addon_message = 0;
return(err);
}
// Default error-management setup
// Fill in the standard error-handling methods in a jpeg_error_mgr object.
// Typical call is:
// jpeg_compress cinfo=new jpeg_compress();
// jpeg_error_mgr err=new jpeg_error_mgr();
//
// cinfo.err=libjpeg.jpeg_std_error(err);
// after which the application may override some of the methods.
public static jpeg_error_mgr jpeg_std_error(jpeg_error_mgr err)
{
err.error_exit=error_exit;
err.emit_message=emit_message;
err.output_message=output_message;
err.format_message=format_message;
err.reset_error_mgr=reset_error_mgr;
err.trace_level=0; // default = no tracing
err.num_warnings=0; // no warnings emitted yet
err.msg_code=0; // may be useful as a flag for "no error"
// Initialize message table pointers
err.jpeg_message_table=jpeg_std_message_table;
err.last_jpeg_message=(int)J_MESSAGE_CODE.JMSG_LASTMSGCODE-1;
err.addon_message_table=null;
err.first_addon_message=0; // for safety
err.last_addon_message=0;
return err;
}
