Bug 8253

Summary:	libpng dumping junk on stderr
Product:	cairo	Reporter:	Havoc Pennington <hp>
Component:	png functions	Assignee:	Chris Wilson <chris>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	high
Version:	1.2.5
Hardware:	x86 (IA32)
OS:	Windows (All)
Whiteboard:
i915 platform:		i915 features:

Description Havoc Pennington 2006-09-13 11:50:19 UTC

to keep libpng from writing crap on stderr you have to set some kind of error 
func, see gtk+/gdk-pixbuf/io-png.c for an example.

Comment 1 Chris Wilson 2007-04-23 05:11:30 UTC

commit ae991a0657be38e0056ba0ed6f85f43a35959a19
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Apr 23 13:00:40 2007 +0100

    Do not print out libpng error messages to stderr.
    
    We wish to avoid writing to file descriptors (and streams) that are
    outside cairo's control. In this case, the messages are superfluous as
    the errors are propagated via the cairo_status_t returns.

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