imgIDecoder in Firefox 2.0

 
 Closes the stream. 

 Flushes the stream.

 Initalize an image decoder.
 @param aRequest the request that owns the decoder.

 @note The decode should QI a aLoad to an imgIDecoderObserver
 and should send decoder notifications to the request.
 The decoder should always pass NULL as the first two parameters to
 all of the imgIDecoderObserver APIs.

 Writes data into the stream from an input stream.
 Implementer's note: This method is defined by this interface in order
 to allow the output stream to efficiently copy the data from the input
 stream into its internal buffer (if any). If this method was provide
 as an external facility, a separate char* buffer would need to be used
 in order to call the output stream's other Write method.
 @param fromStream the stream from which the data is read
 @param count the maximun number of bytes to write
 @return aWriteCount out parameter to hold the number of
         bytes written. if an error occurs, the writecount
         is undefined