Support for JPEG filter

[sambitdash]

Content filter for JPEG and JPEG2000 should be supported.

Since, these are special type filters whether decoding over direct streaming into the graphics channel for rendering should be reviewed.

[sambitdash]

Both formats embed complete JPEG and JPEG2000 files. So technically, one of the other imaging library in conjunction can be used. The correct decode gives back the IO handle to the internal data which can be given to any other imaging library for use.

[digital-carver]

Hi! There's a question on Stackoverflow about reading scanned PDFs, where I believe the goal is to extract images out from a PDF. Is that the functionality this issue is about? Could you expand on what

The correct decode gives back the IO handle to the internal data which can be given to any other imaging library for use.

would look like in practice?