Good job, now you should file the bug in http://bugzilla.xamarin.com/
and find a way to fix the bug in a way in which it doesn't make bug
426305 or 324503 reappear.
On 09/06/15 13:09, Benjamin Schieder wrote:
I have found the bad commit (and learned how to use git bisect in the
process):
[01:04:04][blindcoder@flora:~/Downloads/libgdiplus]$ git bisect bad
59ca17e56adb8555e9b4e0960b771f2849f6366f is the first bad commit
commit 59ca17e56adb8555e9b4e0960b771f2849f6366f
Author: Dick Porter <d...@acm.org>
Date: Thu Mar 31 16:02:19 2011 +0100
Don't premultiply PNG images on loading, no other format does this.
When drawing images, except when drawing onto a memory bitmap,
premultiply
if needed.
Fixes bug 426305, without breaking bug 324503.
:040000 040000 bc4a7075f87afdb5dc6e67c859cd82b06876d29e
cf1cea632be730ad978409f224766097ba1382ea M src
[git:(59ca17e...)|BISECTING][A:0][D:0][M:1][?:5]
If I check out 059ca56800ccca8249260fac5e9e8b45291b8237, the
transparency is fine.
When I update to 59ca17e56adb8555e9b4e0960b771f2849f6366f, the
transparency is incorrect.
Kind regards,
Benjamin
Am 2015-06-09 12:45, schrieb Alexander Köplinger:
There aren't that many commits for pngcodec.c in the last 4 years
(which is when 2.10 was tagged), so it's probably one of those:
https://github.com/mono/libgdiplus/commits/master/src/pngcodec.c .
Shouldn't be too hard to figure out which one broke your scenario.
-- Alex
> To: kno...@gmail.com
> Date: Tue, 9 Jun 2015 12:31:43 +0200
> From: benja...@anderdonau.de
> CC: mono-devel-list@lists.ximian.com
> Subject: Re: [Mono-dev] Problem with PNG transparancy on current
Debian Unstable
>
> Alright, I compiled libgdiplus 2.10 and put it into /opt/libgdiplus2.10/
> I then did the following:
> LD_LIBRARY_PATH=/opt/libgdiplus2.10/lib/
> export LD_LIBRARY_PATH
> ./transparancy.exe
>
> And it works fine. So I guess there is a regression somewhere in
> libgdiplus between 2.10 and today.
>
>
> Am 2015-06-09 12:17, schrieb Benjamin Schieder:
> > I have this version on squeeze:
> > ii libgdiplus 2.10-3+b1
> > armel interface library for System.Drawing of Mono
> >
> > And this version on unstable:
> > ii libgdiplus
> > 3.12-0xamarin1+jpeg62.1 amd64 interface library
> > for System.Drawing of Mono
> >
> > I'll try to compile a 2.10 version of libgdiplus, but that's a lot of
> > difference and probably way above my head to bisect correctly.
> >
> > Am 2015-06-09 11:50, schrieb Andres G. Aragoneses:
> >> You could check what version of
> >> libgdiplus(https://github.com/mono/libgdiplus) did Debian Squeeze
> >> include, and try to run a custom new mono built from sources, with an
> >> older libgdiplus, to confirm that it is a libgdiplus regression.
If it
> >> is, then after that you could try to bisect the commit that
caused it.
> >>
> >> On 09/06/15 11:40, Benjamin Schieder wrote:
> >>> Hello Alex.
> >>>
> >>> I have followed those instructions and done a dist-upgrade, but
after
> >>> re-compiling with mcs the problem persists unchanged. I have the
> >>> following versions now:
> >>>
> >>> [11:38:29][blindcoder@flora:~/Downloads/PZ/MapMap]$ mcs --version
> >>> Mono C# compiler version 4.0.1.0
> >>> [11:38:34][blindcoder@flora:~/Downloads/PZ/MapMap]$ mono --version
> >>> Mono JIT compiler version 4.0.1 (tarball Thu May 28 09:08:28 UTC
> >>> 2015)
> >>> Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors.
> >>> www.mono-project.com
> >>> TLS: __thread
> >>> SIGSEGV: altstack
> >>> Notifications: epoll
> >>> Architecture: amd64
> >>> Disabled: none
> >>> Misc: softdebug
> >>> LLVM: supported, not enabled.
> >>> GC: sgen
> >>> [11:38:37][blindcoder@flora:~/Downloads/PZ/MapMap]$ cli --version
> >>> Mono JIT compiler version 4.0.1 (tarball Thu May 28 09:08:28 UTC
> >>> 2015)
> >>> Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors.
> >>> www.mono-project.com
> >>> TLS: __thread
> >>> SIGSEGV: altstack
> >>> Notifications: epoll
> >>> Architecture: amd64
> >>> Disabled: none
> >>> Misc: softdebug
> >>> LLVM: supported, not enabled.
> >>> GC: sgen
> >>>
> >>> Kind regards,
> >>> Benjamin
> >>>
> >>> Am 2015-06-09 11:07, schrieb Alexander Köplinger:
> >>>
> >>>> It works fine here with latest Mono 4.0.1.44 on Ubuntu. Can you try
> >>>> upgrading to latest Mono from Xamarin by following
> >>>>
http://www.mono-project.com/docs/getting-started/install/linux/#debian-ubuntu-and-derivatives
> >>>> ?
> >>>>
> >>>> I suspect this has something to do with libgdiplus (the native
> >>>> library
> >>>> most of the System.Drawing code calls into).
> >>>>
> >>>> -- Alex
> >>>>
> >>>> > To: mono-devel-list@lists.ximian.com
> >>>> > Date: Tue, 9 Jun 2015 10:15:02 +0200
> >>>> > From: benja...@anderdonau.de
> >>>> > Subject: [Mono-dev] Problem with PNG transparancy on current
Debian
> >>>> Unstable
> >>>> >
> >>>> > Hello.
> >>>> >
> >>>> > I have a problem with PNG transparancy in mono on current Debian
> >>>> > Unstable.
> >>>> > I created a small example (4 kB download) with minimal code
and two
> >>>> > example images:
> >>>> > https://oc.anderdonau.de/index.php/s/VwTAlcjETG6j3XP
> >>>> >
> >>>> > Running this example on a current Debian Unstable results in
this - bad
> >>>> > - image:
> >>>> > https://oc.anderdonau.de/index.php/s/AtVtba0tpSk4bn8
> >>>> >
> >>>> > Running the same code on an old Debian Squeeze (on armel)
results in
> >>>> > this - correct - image:
> >>>> > https://oc.anderdonau.de/index.php/s/eqhmXh9qpBbg0WW
> >>>> >
> >>>> > Can someone help me with this issue?
> >>>> >
> >>>> >
> >>>> > Kind regards,
> >>>> > Benjamin
> >>>> > --
> >>>> > Jabber: blindco...@jabber.ccc.de
> >>>> > Twitter: https://twitter.com/blind_coder
> >>>> > Web: http://www.benjamin-schieder.de/
> >>>> > _______________________________________________
> >>>> > Mono-devel-list mailing list
> >>>> > Mono-devel-list@lists.ximian.com
> >>>> > http://lists.ximian.com/mailman/listinfo/mono-devel-list
> >>>
> >>> Jabber: blindco...@jabber.ccc.de <mailto:blindco...@jabber.ccc.de>
> >>> Twitter: https://twitter.com/blind_coder
> >>> Web: http://www.benjamin-schieder.de/
> >>>
> >>>
> >>> _______________________________________________
> >>> Mono-devel-list mailing list
> >>> Mono-devel-list@lists.ximian.com
> >>> http://lists.ximian.com/mailman/listinfo/mono-devel-list
> >>>
> >>
> >>
> >> _______________________________________________
> >> Mono-devel-list mailing list
> >> Mono-devel-list@lists.ximian.com
> >> http://lists.ximian.com/mailman/listinfo/mono-devel-list
>
> --
> Jabber: blindco...@jabber.ccc.de
> Twitter: https://twitter.com/blind_coder
> Web: http://www.benjamin-schieder.de/
> _______________________________________________
> Mono-devel-list mailing list
> Mono-devel-list@lists.ximian.com
> http://lists.ximian.com/mailman/listinfo/mono-devel-list
Jabber: blindco...@jabber.ccc.de <mailto:blindco...@jabber.ccc.de>
Twitter: https://twitter.com/blind_coder
Web: http://www.benjamin-schieder.de/
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