Hi yakobom, > and I'm trying to get the image when > reaching OnStopDecode. > [...] > I'm converting a piece of code from older Mozilla, where we > used gfxIImageFrame::GetImageData.
Ok, cool - so instead of "EnsureCleanFrame", I think you want to use "imgIContainer::CopyFrame" to create a gfxImageSurface, and then you want to call "Data()" on the resulting surface.
References: http://mxr.mozilla.org/mozilla-central/source/modules/libpr0n/public/imgIContainer.idl#173 http://mxr.mozilla.org/mozilla-central/source/gfx/thebes/gfxImageSurface.h#48 ~Daniel On 03/08/2011 08:00 PM, Moshe Yakobovich wrote:
Hi Daniel, Thanks for the quick and detailed response. What I'm trying to do is simple - get the raw image of a given URL. My class implements imgIDecoderObser, yes. I call LoadImage on an instance of the class, and I'm trying to get the image when reaching OnStopDecode. It works for JPG only, as mentioned. I'm converting a piece of code from older Mozilla, where we used gfxIImageFrame::GetImageData. I will be happy to hear any suggestions. yakobom On Tue, Mar 8, 2011 at 8:27 AM, Daniel Holbert <[email protected] <mailto:[email protected]>> wrote: > I retrieve the image from the > imgIRequest using imgIContainer::EnsureCleanFrame. I don't think that function does what you think it does. A quick MXR search[1] shows that it's only called once in Mozilla code -- from inside the JPEG decoder -- so unless you're implementing something like a JPEG decoder, you probably don't want that function. :) Do you have an imgIDecoderObserver implementation in your application? I think you'll need one of those, in order to get notifications about when the image has finished loading & decoding. See in particular OnStartContainer and OnStopDecode. For a sample implementation of those methods, see nsImageListener (which just forwards the methods along to identically-named methods in nsImageFrame). [2] Joe or bholley could probably offer the best help here, but first I think they'd need more information about what you're trying to achieve. I'm CC'ing them, but it'd help if you could post back in a bit more detail about what you're trying to do and what you've got so far. Good luck, ~Daniel [1] http://mxr.mozilla.org/mozilla-central/search?string=EnsureCleanFrame [2] http://mxr.mozilla.org/mozilla-central/source/layout/generic/nsImageFrame.h#75 http://mxr.mozilla.org/mozilla-central/source/layout/generic/nsImageFrame.cpp#2047 On 03/08/2011 06:51 PM, yakobom wrote: Hi, I hope this is the right place to get some answers on this issue. In my embedding application (Windows, C++) I'm using imgILoader::LoadImage to fetch images. I retrieve the image from the imgIRequest using imgIContainer::EnsureCleanFrame. The problem is that I can only get JPG images, PNG ones come out black. Any ideas? I would appreciate any help, this is quite urgent. Thanks, yakobom _______________________________________________ dev-tech-layout mailing list [email protected] <mailto:[email protected]> https://lists.mozilla.org/listinfo/dev-tech-layout
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