Darin, Thanks for the pointers. I did make little progress. Current plan is to find out the entire flow from a HTML page to point of Image decode. Do we have any documents to help us understand the classes?
I could trace till this point. From: void CachedImage::data(PassRefPtr<SharedBuffer> data, bool allDataReceived) inside this function we have a call to setData sizeAvailable = m_image->setData(m_data, allDataReceived); Which is calling Android Implemenation of ImageSource class void ImageSource::setData(SharedBuffer* data, bool allDataReceived) Further down this calls Android Skia libraries which decide on SW or HW Image Decoder. On Thu, Mar 19, 2009 at 4:24 PM, Darin Adler <[email protected]> wrote: > On Mar 19, 2009, at 1:51 PM, Ravi Ramachandra wrote: > > I am very new to webkit. Pardon my silly question. >> I wanted to know when and where do we decode a JPEG image file? >> >> For example if on a HTML page if i encounter <IMG/> tag and with that tag >> we have a src=".http:///xxxx/some_picture.jpg";, how does webkit render >> this? >> It needs to decode this MIME type and i know webkit has a JPEG decoder >> built into it, but i am unable to find a right place in code. >> > > The decoder is not chosen based on the MIME type. It’s chosen based on the > actual image data. Bitmap work in <img> tags even if the wrong type is > given, unless the type happens to be the type of one of the non-bitmap > images (application/pdf or image/svg+xml). > > The class that handles image decoding is ImageSource. For Android, you can > look at the header ImageDecoder.h for some more details. > > -- Darin > >
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