Created attachment 12886 [details]
1-page PDF with incorrect background
The black background of the attached PDF file is not rendered correctly by mupdf (tried both mupdf 1.3-2 and the last version built from the git repo).
Steps to reproduce:
open the attached PDF with mupdf.
The black background is not uniform, some parts are black, some are gray.
The black background should be uniformly black, as displayed by other PDF readers such as Evince.
Created attachment 12887 [details]
screenshot full screen of mupdf
This is an example of what I see when I open the file with mupdf.
The background should be uniformly black
The background is a full page CMYK color jpeg image, object 4 in the PDF.
Author: Robin Watts <firstname.lastname@example.org>
Date: Wed Oct 12 16:27:45 2016 +0100
Bug 697065: Fix bug in CMYK -> RGB pixmap converter.
When caching the cmyk values used to generate a given
rgb value, it is best to cache the values before processing.