[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2015-11-04 Thread Sebastien Bacher
The fixes is included in that update
https://launchpad.net/ubuntu/+source/cairo/1.14.4-1

** Changed in: cairo (Ubuntu)
   Status: Fix Committed => Fix Released

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  Inkscape (using cairo) fails to print thin lines to PDF

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2015-10-19 Thread Sebastien Bacher
upstream commited some fixes, see
http://cgit.freedesktop.org/cairo/commit/?id=b1192beac7c5b56a8ff356d20af5ebfb65404109
http://cgit.freedesktop.org/cairo/commit/?id=30eb1b0e9778a96c2eb984f243dec5e3c8859e05
http://cgit.freedesktop.org/cairo/commit/?id=aa1323f04cd2c71317e9173fbe26fe7d0ba34908

** Changed in: cairo (Ubuntu)
   Status: Triaged => Fix Committed

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2015-10-18 Thread Bug Watch Updater
** Changed in: libcairo
   Status: Confirmed => Fix Released

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[Bug 1306846]

2015-10-18 Thread ~suv
(In reply to Adrian Johnson from comment #17)
> Should be fixed now.

Thx a lot - build fix confirmed for quartz, quartz-image, xml and tee
surface backends.

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[Bug 1306846]

2015-10-18 Thread ~suv
@Adrian - the commit broke the quartz backend (and based on comments on
irc the gl backend too):

  CC   cairo-quartz-surface.lo
cairo-quartz-surface.c:2265:12: error: too few arguments to function call, 
expected 5, have 4
 content);
^
./cairoint.h:1335:1: note: '_cairo_surface_init' declared here
cairo_private void
^
./cairo-compiler-private.h:133:27: note: expanded from macro 'cairo_private'
#define cairo_private   cairo_private_no_warn cairo_warn
^
./cairo-compiler-private.h:120:31: note: expanded from macro 
'cairo_private_no_warn'
#define cairo_private_no_warn   __attribute__((__visibility__("hidden")))
^
1 error generated.
make[3]: *** [cairo-quartz-surface.lo] Error 1

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[Bug 1306846]

2015-10-18 Thread Adrian Johnson
Should be fixed now.

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[Bug 1306846]

2015-10-18 Thread Damien
There's also a similar error for
_cairo_path_fixed_approximate_stroke_extents():

cairo-gl-msaa-compositor.c:584:6: error: too few arguments to function
‘_cairo_path_fixed_approximate_stroke_extents’

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[Bug 1306846]

2015-10-18 Thread Adrian Johnson
I've commit my patch and testcase.

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[Bug 1306846]

2015-10-18 Thread Damien
It seems the GL backend still doesn't compile as a couple uses of
_cairo_surface_init weren't updated:

cairo-gl-source.c:76:5: error: too few arguments to function 
‘_cairo_surface_init’
cairo-gl-source.c:103:5: error: too few arguments to function 
‘_cairo_surface_init’

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[Bug 1306846]

2015-09-26 Thread Sebastien Bacher
is there anyone wanting to review that one?

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[Bug 1306846]

2015-09-26 Thread Adrian Johnson
(In reply to Bill Spitzak from comment #13)
> Created attachment 118385 [details]
> attachment-30721-0.html
> 
> This seems excessively complex, rather than having the later handler (the
> one turning a non-zero float into a zero fixed) be patched instead. I
> figure it would be correct for all backends to turn very tiny but non-zero
> line widths into the smallest ones they can render.

We don't want to alter the line width on the vector backends. If a
0.001mm line width is specified for pdf that is the line width it should
use. My patch only alters the line width when the extents are measured
for the purpose of culling 0 width/height objects.

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[Bug 1306846]

2015-09-26 Thread Adrian Johnson
Created attachment 118381
cairo test for thin lines

This patch contains a cairo test for thin lines.

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[Bug 1306846]

2015-09-26 Thread Adrian Johnson
Created attachment 118380
Don't cull thin lines on vector backends

The patch didn't work for my test case and broke many other tests.

Attached is a new patch that seems to fix the bug. The patch ensures a
minimum line width when calculating stroke extents on vector backends.

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[Bug 1306846]

2015-09-26 Thread Spitzak-k
Created attachment 118385
attachment-30721-0.html

This seems excessively complex, rather than having the later handler (the
one turning a non-zero float into a zero fixed) be patched instead. I
figure it would be correct for all backends to turn very tiny but non-zero
line widths into the smallest ones they can render.


On Mon, Sep 21, 2015 at 5:18 AM, <bugzilla-dae...@freedesktop.org> wrote:

> *Comment # 12 <https://bugs.freedesktop.org/show_bug.cgi?id=77298#c12> on
> bug 77298 <https://bugs.freedesktop.org/show_bug.cgi?id=77298> from Adrian
> Johnson <ajohn...@redneon.com> *
>
> Created attachment 118381 
> <https://bugs.freedesktop.org/attachment.cgi?id=118381> [details] 
> <https://bugs.freedesktop.org/attachment.cgi?id=118381=edit> [review] 
> <https://bugs.freedesktop.org/page.cgi?id=splinter.html=77298=118381>
> cairo test for thin lines
>
> This patch contains a cairo test for thin lines.
>
> --
> You are receiving this mail because:
>
>- You are watching the QA Contact of the bug.
>
>

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  Inkscape (using cairo) fails to print thin lines to PDF

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[Bug 1306846]

2015-03-28 Thread Jürgen Weigert
@Chris Wilson et all:

I'd like to raise priority on this issue.
We know the issue to exist for several years now on Linux systems. Recently we 
see more and more Windows systems to suffer from the same issue. The attached 
patch is simple and fixes the issue. 

Is there anything I can do to summon a cairo maintainer here?

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[Bug 1306846]

2014-10-12 Thread Jürgen Weigert
(In reply to Sebastien Bacher from comment #6)
 Could somebody review the suggested change there?

Patrick's version is best, please go ahead with this patch!

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[Bug 1306846]

2014-06-09 Thread Sebastien Bacher
Could somebody review the suggested change there?

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[Bug 1306846]

2014-06-09 Thread Adrian Johnson
This is not really a pdf specific problem. We need to always pass
strokes through to the vector backends no matter how thin. I don't know
the best way to do this as I am not familiar with that code that these
patches modify.

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-14 Thread Sebastien Bacher
Thanks for your bug report/work on it. That seems like a valid bugfix to
backport but we are probably going to want to have a review comment from
upstream first (and ideally having them commiting the fix to their vcs)

** Changed in: cairo (Ubuntu)
   Importance: Undecided = High

** Changed in: cairo (Ubuntu)
   Status: New = Triaged

** Bug watch added: freedesktop.org Bugzilla #77298
   https://bugs.freedesktop.org/show_bug.cgi?id=77298

** Also affects: libcairo via
   https://bugs.freedesktop.org/show_bug.cgi?id=77298
   Importance: Unknown
   Status: Unknown

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-14 Thread Bug Watch Updater
Launchpad has imported 6 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=77298.

If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
Launchpad's inter-bugtracker facilities at
https://help.launchpad.net/InterBugTracking.


On 2014-04-11T02:43:50+00:00 Jürgen Weigert wrote:

Since 1.12.3, cairo cannot render fine lines to pdf. 1.12.2 was the last
version that worked.


http://cgit.freedesktop.org/cair/diff/?id=bdf83008f4b2c723fd8e65e2a92bc47a2e7bc442

introduced this code in cairo-compositor.c:_cairo_compositor_stroke

   if (_cairo_pen_vertices_needed (tolerance, style-line_width/2, ctm) = 1)
return CAIRO_INT_STATUS_NOTHING_TO_DO;

The idea was to avoid lines that would be invisible when rasterized.
While this is a valid logic for raster backends, it is a bad idea for
PDF output. There we want to see all fine lines.

My specific use case is generating a lasercutter drawing for an Epilog
Zing laser with inkscape. There the hardware would raster anything
thicker than 0.02mm, and cut 0.01mm or below. 1.12.3 skips lines below
0.036mm, 1.13.1 skips lines below 0.018mm -- which is still not enough
to safely drive my lasercutter.

See also https://bugs.launchpad.net/inkscape/+bug/1174909

Check out the attached reproducer.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/0


On 2014-04-11T02:45:43+00:00 Jürgen Weigert wrote:

Created attachment 97205
reproducer

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/1


On 2014-04-11T02:48:52+00:00 Jürgen Weigert wrote:

Created attachment 97206
Example output from the reproducer with missing objects.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/2


On 2014-04-11T02:51:20+00:00 Jürgen Weigert wrote:

Created attachment 97207
Example output from the reproducer when good.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/3


On 2014-04-11T12:43:41+00:00 Jürgen Weigert wrote:

Created attachment 97220
suggested fix.

Please double check if num_vertices == 1 should never be done (for PDF).

I am not sure why this was introduced at all. With 1.12.2 the lowest
num_vertices value was 4, which assured that all objects are rendered to
the PDF.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/4


On 2014-04-12T00:44:29+00:00 Jürgen Weigert wrote:

Created attachment 97247
Suggested fix. Different approach.

Contributed by Patrick Himmelmann. Now we have something to discuss.
Maybe we find a third alternative, so that the logic for raster backends
continues to discard small objects, but the logic for vector backends
includes everything?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/comments/5


** Changed in: libcairo
   Status: Unknown = Confirmed

** Changed in: libcairo
   Importance: Unknown = Medium

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Re: [Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-14 Thread Jürgen Weigert
Hi Sebastian, I dont want to archive my emails on bugreports privately.
Please add your comments directly to the report. Thanks, JW-
Am 14.04.2014 10:50 schrieb Sebastien Bacher seb...@ubuntu.com:

 Thanks for your bug report/work on it. That seems like a valid bugfix to
 backport but we are probably going to want to have a review comment from
 upstream first (and ideally having them commiting the fix to their vcs)

 ** Changed in: cairo (Ubuntu)
Importance: Undecided = High

 ** Changed in: cairo (Ubuntu)
Status: New = Triaged

 ** Bug watch added: freedesktop.org Bugzilla #77298
https://bugs.freedesktop.org/show_bug.cgi?id=77298

 ** Also affects: libcairo via
https://bugs.freedesktop.org/show_bug.cgi?id=77298
Importance: Unknown
Status: Unknown

 --
 You received this bug notification because you are subscribed to the bug
 report.
 https://bugs.launchpad.net/bugs/1306846

 Title:
   Inkscape (using cairo) fails to print thin lines to PDF

 Status in libcairo  -  cairo vector graphics library:
   Unknown
 Status in “cairo” package in Ubuntu:
   Triaged

 Bug description:
   Since 1.12.3, cairo cannot render fine lines to pdf. 1.12.2 was the
   last version that worked.


 http://cgit.freedesktop.org/cair/diff/?id=bdf83008f4b2c723fd8e65e2a92bc47a2e7bc442

   introduced code to avoid lines that would be invisible when
   rasterized. While this is a valid logic for raster backends, it is a
   bad idea for PDF output. There we want to see all fine lines.

   My specific use case is generating a lasercutter drawing for an Epilog
   Zing laser with inkscape. There the hardware would raster anything
   thicker than 0.02mm, and cut 0.01mm or below. 1.12.3 skips lines below
   0.036mm, 1.13.1 skips lines below 0.018mm -- which is still not enough
   to safely drive my lasercutter.

   Previously reported against inkscape:
   https://bugs.launchpad.net/inkscape/+bug/1174909

   Also reported agains cairo upstream with a suggested fix:
 https://bugs.freedesktop.org/show_bug.cgi?id=77298
   Check out the attached reproducer and fix.

   I'd suggest to circulate patched ubuntu packages, until upstream
   releases an official fix.

 To manage notifications about this bug go to:
 https://bugs.launchpad.net/libcairo/+bug/1306846/+subscriptions


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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-14 Thread Sebastien Bacher
 Hi Sebastian, I dont want to archive my emails on bugreports privately.
 Please add your comments directly to the report. Thanks, JW-

? I only used the webUI from launchpad to comment on the bug. Launchpad,
like most bug trackers, send you new comments using emails so you know
of activity on the bug you reported...

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[Bug 1306846] [NEW] Inkscape (using cairo) fails to print thin lines to PDF

2014-04-11 Thread Jürgen Weigert
Public bug reported:

Since 1.12.3, cairo cannot render fine lines to pdf. 1.12.2 was the last
version that worked.

http://cgit.freedesktop.org/cair/diff/?id=bdf83008f4b2c723fd8e65e2a92bc47a2e7bc442

introduced code to avoid lines that would be invisible when rasterized.
While this is a valid logic for raster backends, it is a bad idea for
PDF output. There we want to see all fine lines.

My specific use case is generating a lasercutter drawing for an Epilog
Zing laser with inkscape. There the hardware would raster anything
thicker than 0.02mm, and cut 0.01mm or below. 1.12.3 skips lines below
0.036mm, 1.13.1 skips lines below 0.018mm -- which is still not enough
to safely drive my lasercutter.

Previously reported against inkscape:
https://bugs.launchpad.net/inkscape/+bug/1174909

Also reported agains cairo upstream with a suggested fix: 
https://bugs.freedesktop.org/show_bug.cgi?id=77298
Check out the attached reproducer and fix.

I'd suggest to circulate patched ubuntu packages, until upstream
releases an official fix.

** Affects: cairo (Ubuntu)
 Importance: Undecided
 Status: New

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-11 Thread Jürgen Weigert
** Attachment added: reproducer
   
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/+attachment/4081562/+files/test_cairo.py

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-11 Thread Jürgen Weigert
** Patch added: alternate suggested fix.
   
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/+attachment/4081564/+files/cairo.diff

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-11 Thread Jürgen Weigert
** Patch added: suggested fix.
   
https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1306846/+attachment/4081563/+files/fix_for_fdo77298.patch

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Title:
  Inkscape (using cairo) fails to print thin lines to PDF

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[Bug 1306846] Re: Inkscape (using cairo) fails to print thin lines to PDF

2014-04-11 Thread Ubuntu Foundations Team Bug Bot
The attachment suggested fix. seems to be a patch.  If it isn't,
please remove the patch flag from the attachment, remove the patch
tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the
team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

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https://bugs.launchpad.net/bugs/1306846

Title:
  Inkscape (using cairo) fails to print thin lines to PDF

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