imgIDecoderObserver Interface

 imgIDecoderObserver interface

 This interface is used both for observing imgIDecoder objects and for
 observing imgIRequest objects.  In the former case, aRequest is
 always null.
 XXXldb The two functions should probably be split.

 @author Stuart Parmenter <pavlov@netscape.com>
 @version 0.1
 @see imagelib2

[scriptable, uuid(cce7152e-4395-4231-a781-c347c5446cc2)]

Methods

 called when some part of the frame has new data in it

[noscript] void onDataAvailable(in imgIRequest aRequest, in gfxIImageFrame aFrame, [const] in nsIntRect aRect)

 called once the image has been inited and therefore has a width and height

void onStartContainer(in imgIRequest aRequest, in imgIContainer aContainer)

 called as soon as the image begins getting decoded

void onStartDecode(in imgIRequest aRequest)

 called when each frame is created

void onStartFrame(in imgIRequest aRequest, in gfxIImageFrame aFrame)

 probably not needed.  called right before onStopDecode

void onStopContainer(in imgIRequest aRequest, in imgIContainer aContainer)

 called when the decoder is dying off

void onStopDecode(in imgIRequest aRequest, in nsresult status, in wstring statusArg)

 called when a frame is finished decoding

void onStopFrame(in imgIRequest aRequest, in gfxIImageFrame aFrame)