Bug 690545

Summary:	confirm JPXDecode streams support 12 and 16 bit
Product:	Ghostscript	Reporter:	Ralph Giles <ralph.giles>
Component:	JPX/JBIG2 encode/decode	Assignee:	Alex Cherepanov <alex>
Status:	RESOLVED FIXED
Severity:	normal	CC:	lars, michael.vrhel
Priority:	P4	Keywords:	bountiable
Version:	master
Hardware:	PC
OS:	Linux
Customer:		Word Size:	---

Description Ralph Giles 2009-06-17 22:43:52 UTC

Currently we assume JPXDecode images are always 8 bits per component. With r9801
I added support for 4 bpp grayscale.

We need to handle the full range of possible bit depths in PDF, and scale things
appropriately if the stream doesn't agree with the /BitsPerComponent key in the
image dictionary.

Comment 1 Ray Johnston 2009-06-18 11:00:24 UTC

Please attach sample files in some of the desired formats so that someone
can work on these. I've marked it bountiable.

Comment 2 Ray Johnston 2010-08-23 15:05:10 UTC

I think Michael and/or Alex already fixed this. One of the PDF 1.7 FTS files
has 16-bit JPX images.

Comment 3 Ray Johnston 2010-09-02 16:47:35 UTC

Michael Vrhel fixed this for jasper. We need to confirm that these work with
OpenJpeg as well.

Comment 4 Alex Cherepanov 2012-04-10 03:59:15 UTC

OpenJpeg currently supports all the files in our test suite.