Bug 389309

Summary:	app-text/ghostscript-gpl transparent png export fix from upstream
Product:	Gentoo Linux	Reporter:	László Szalma <dblaci>
Component:	Current packages	Assignee:	Printing Team <printing>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description László Szalma 2011-11-02 09:59:10 UTC

I ran into a bug, when i tried to export transparent pngs when the resolution dpi is high.

I found that it is fixed in upstream, but i needed it now, so i tried only that patch, and it works fine. Consider using the patch and release another -r ebuild

Reproducible: Always

Steps to Reproduce:
gs -dUseCropBox -dSAFER -dBATCH -dNOPAUSE -r300 -sDEVICE=pngalpha -dTextAlphaBits=4 -sOutputFile="pic_%03d.png" test.pdf

Actual Results:  
png background if white (#ff0000)

Expected Results:  
png with transparent background

http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=5ce12e8;hp=f790680acba5c1574728d5ff40124f9e27762d2a

this patch works (saved as alphapng.patch)

i put this line in the 9.04-r4 ebuild (on line 85)
epatch "${FILESDIR}/alphapng.patch"

Comment 1 Timo Gurr (RETIRED) gentoo-dev

2011-12-21 21:16:19 UTC

Thanks for providing a solution, the upstream fix is included in the patch tarball for -r5.