[gs-devel] Getting a JPX stream's colorspace

[Martin Schröder]

2007/12/1, Igor V. Melichev <igor.melichev at artifex.com>:
> Normally the PDF interpreter knows
> whether a page uses a transparency
> from the page dictionary before starting the page rendering.

Btw: How does it know this? /Resources? I ask because we had in pdftex
the problem with including pdfs (or pngs with alpha) as xobjects and
Adobe Reader then not detecting the transparency; the solution is to
promote the Group object of the pdf from the xobject to the page or
add a "fake" Group object to the page (with pngs). I wouldn't be
surprised if Adobe rips would require this also for transparent JPXs.

Best
   Martin