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Inherits from:
nsISupports
Last changed in Gecko 8.0 (Firefox 8.0 / Thunderbird 8.0 / SeaMonkey 2.5)Implemented by @mozilla.org/image/loader;1
as a service:
var imgILoader = Components.classes["@mozilla.org/image/loader;1"] .getService(Components.interfaces.imgILoader);
Method overview
imgIRequest loadImage(in nsIURI aURI, in nsIURI aInitialDocumentURL, in nsIURI aReferrerURI, in nsIPrincipal aLoadingPrincipal, in nsILoadGroup aLoadGroup, in imgIDecoderObserver aObserver, in nsISupports aCX, in nsLoadFlags aLoadFlags, in nsISupports cacheKey, in imgIRequest aRequest, in nsIChannelPolicy channelPolicy); |
imgIRequest loadImageWithChannel(in nsIChannel aChannel, in imgIDecoderObserver aObserver, in nsISupports cx, out nsIStreamListener aListener); |
boolean supportImageWithMimeType(in string mimeType); |
Constants
Constant | Value | Description |
LOAD_CORS_ANONYMOUS | 1 << 16 | |
LOAD_CORS_USE_CREDENTIALS | 1 << 17 |
Methods
loadImage()
Start the load and decode of an image.
imgIRequest loadImage( in nsIURI aURI, in nsIURI aInitialDocumentURL, in nsIURI aReferrerURI, in nsIPrincipal aLoadingPrincipal, in nsILoadGroup aLoadGroup, in imgIDecoderObserver aObserver, in nsISupports aCX, in nsLoadFlags aLoadFlags, in nsISupports cacheKey, in imgIRequest aRequest, in nsIChannelPolicy channelPolicy );
Parameters
aURI
- The URI to load.
aInitialDocumentURL
aReferrerURI
- The 'referring' URI.
aLoadingPrincipal
- The principal of the loading document.
aLoadGroup
- Loadgroup to put the image load into.
aObserver
- The observer (may be
null
) aCX
- Some random data.
aLoadFlags
- Load flags for the request.
cacheKey
aRequest
- A newly created, unused
imgIRequest
object ornull
for one to be created for you. libpr0n does NOT keep a strong ref to the observer; this prevents reference cycles. This means that callers ofloadImage
should make sure to Cancel() the resulting request before the observer goes away. channelPolicy
Return value
loadImageWithChannel()
Start the load and decode of an image.
libpr0n does NOT keep a strong ref to the observer; this prevents reference cycles. This means that callers of loadImageWithChannel
should make sure to Cancel() the resulting request before the observer goes away.
imgIRequest loadImageWithChannel( in nsIChannel aChannel, in imgIDecoderObserver aObserver, in nsISupports cx, out nsIStreamListener aListener );
Parameters
aChannel
- The channel to load the image from. This must already be opened before this method is called, and there must have been no OnDataAvailable calls for it yet.
aObserver
- The observer (may be
null
) cx
- Some random data.
aListener
- A listener that you must send the channel's notifications and data to. Can be
null
, in which case imagelib has found a cached image and is not interested in the data.aChannel
will be canceled for you in this case.
Return value
supportImageWithMimeType()
Checks if a decoder for the an image with the given mime type is available.
boolean supportImageWithMimeType( in string mimeType );
Parameters
mimeType
- The type to find a decoder for.
Return value
true
if a decoder is available, false
otherwise.