Please,,, give me any information on how to decode JPEG, PNG.

[김영곤]

Please,,, give me any information on how to do decoding Images like JPEG, PNG, etc...

 

Actually, I've been studying these things like full decoding and region decoding.

 

BuildtileIndex method is firstly needed for Region decoding. And then,,,,, we couldn't understand any more because we never know the engine of Skia.

 

Give me any information on flow of Skia engine for decoding Images.

[Derek Sollenberger]

The region decoder is currently not supported on most platforms as it currently relies on some modifications to libjpeg and libpng that only Android supports.  I will work on implementing a generic version that will work with all codecs, but when that makes it into the code base is still to be determined.

However, decoding the entire image should be fairly straightforward.  The simplest way to do it is create a stream containing your compressed image and pass it to SkImageDecoder::DecodeStream(...) which will determine the correct codec to use and put the result into the bitmap you provide.

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[杨继超]

As Derek said, there are SkImageDecoder and SkImageEncoder for various image types such as JPEG, PNG etc, you could look over the source in /src/images folder.

However, skia depends on the Windows Imaging Component.