[Gimp-developer] digital painting on GIMP and the paint dynamics

[americo gobbo via gimp-developer-list]

Hi All,
My current interest in GIMP assets is flipped from brushes to paint 
dynamics and tool presets. The traditional or known as main assets 
(brushes, patterns, palettes, gradients, etc.), for me, this concept 
must be studied more.
The idea is to improve the paint dynamics and write some articles about 
using them with tool presets and a minimal brush set.


The set of traditional assets on this research will be minimal because I 
want to have an approach impartial or made to all, if it is possible 
and, more focused on the painting characteristics of each technique ;)


I hope that developers, collaborators, artists and all interested in the 
digital painting topic could help me in this work, with suggestions, 
links, testing the assets, etc.


To organize all the paint dynamics and tool presets "ready to use", will 
be necessary a plugin for this scope on GIMP. In this sense, I am 
talking with Joao Bueno. I saw, also, a recent discussion about this 
topic here some days ago.


Grazie a tutti,
Americo
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[Gimp-developer] Motivations/Scopes of the my GIMP 2.10 Brush Set

[Americo Gobbo]

erify them during the process.
Ideally, we must think a categorization more transparent or hidden for the 
assets on GIMP... and not only based on the alphabetic ordering. Is natural for 
all users have criteria more personal, like as favorites... if we think a 
spreadsheet is possible to have also ordering things based on our tastes and 
needs. At this moment is not possible to have this feature and I have thought a 
way to solve this in the GIMP default set and also a manner to harmonize the 
future additional sets of other authors.
In my opinion is necessary to have an order on default GIMP set, this is a good 
way also to exemplify how is possible to collect and organize assets in an 
efficient way. This is not a rule for all users, but I think that GIMP must 
have rules to organize their default assets. The users could be adopted or not 
these rules as is more natural to them.

--
Brush Asset Authors Reference
Yet is not possible to add info about author and license of each brush, but I 
have thought that is a good idea, in this moment, add this info directly to the 
layer of brush. Therefore each brush set of the GIMP 2.10 will be rewritten 
adding the info of authors in the own brushes, in my opinion, this avoids the 
necessity of a document with reference of authors to each brush. Until this 
moment the authors of brush set are:

David Revoy
Elle Stone
GIMP (when was not possible identify the original author).
Gustavo Deveze
Jag (Americo Gobbo)
Johannes Engelhardt
Justin W (Akisu-sama)
L'ubomir Zabadal
Mathias Jonathan
Mozart Couto
Ramon Miranda
Rene Jensen
Ulf Worsoe
Vallie (valliegurl)
Vasco Alexander

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[Gimp-developer] GEGL Compilation Error

[Americo Gobbo]

Hi all,
I am trying compile the GEGL but I have this error (git clone updated).
All dependencies are complete and .autogen.sh is OK.
Thanks
americo

===
...
  CC   clip.o
  CCLD gcut
make[2]: Leaving directory '/home/jag/devel/gimp-git-master/gegl/gcut'
Making all in tools
make[2]: Entering directory '/home/jag/devel/gimp-git-master/gegl/tools'
  CC   gegl-imgcmp.o
  CC   introspect.o
  CC   operation_reference.o
  CC   detect_opencl.o
  CC   gegl-tester.o
  CC   operations_html.o
  CXX  exp_combine-exp_combine.o
../depcomp: line 772: exec: g++: not found
make[2]: *** [Makefile:716: exp_combine-exp_combine.o] Error 127
make[2]: *** Waiting for unfinished jobs
make[2]: Leaving directory '/home/jag/devel/gimp-git-master/gegl/tools'
make[1]: *** [Makefile:637: all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-git-master/gegl'
make: *** [Makefile:544: all] Error 2
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[Gimp-developer] GEGL make error - Fedora 27

[Americo Gobbo]

Hi All,
I am trying create the environment on Fedora 27 to GIMP devel... But, I have 
found problems on 'make' process:

Making all in gcut
make[2]: Entering directory '/home/jag/devel/gimp-git-master/gegl/gcut'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/home/jag/devel/gimp-git-master/gegl/gcut'
Making all in tools
make[2]: Entering directory '/home/jag/devel/gimp-git-master/gegl/tools'
  CCLD introspect
  CCLD operation_reference
  CCLD detect_opencl
  CCLD gegl-tester
  CXX  exp_combine-exp_combine.o
  CCLD operations_html
../depcomp: line 772: exec: g++: not found
make[2]: *** [Makefile:716: exp_combine-exp_combine.o] Error 127
make[2]: *** Waiting for unfinished jobs
make[2]: Leaving directory '/home/jag/devel/gimp-git-master/gegl/tools'
make[1]: *** [Makefile:633: all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-git-master/gegl'
make: *** [Makefile:540: all] Error 2
===
the autogen.sh is OK, all dependencies are completed (less mrg ;)
Someone can help me?

Thanks
americo
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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Jehan,

On 03/02/2018 22:47, Jehan Pagès wrote:

Well there is nothing in the command line itself which relates to
libexiv2. It looks like there is something wrong in the libtool script
wrapper generated by the build system. Delete the file "libtool" which
you will find in the root of the git repository. Then run the
configure script again (this will create again the libtool wrapper),
then make and let's see what happens.

Is the same behavior... very strange.

libtool:   error: cannot find the library '/usr/local/lib/libexiv2.la' 
or unhandled argument '/usr/local/lib/libexiv2.la'

Makefile:571: recipe for target 'gegl' failed
make[2]: *** [gegl] Error 1
make[2]: Leaving directory '/home/jag/devel/gimp-default-master-/gegl/bin'
Makefile:634: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-default-master-/gegl'
Makefile:541: recipe for target 'all' failed
make: *** [all] Error 2

---

This is my 'autogen.sh' output:

config.status: creating po/Makefile

Building GEGL with prefix=/opt/gimp-default-master

Optional features:
  GEGL docs:   yes
  Build workshop:  no
  Build website:   yes
  SIMD:    sse:yes mmx:yes
  Vala support:    yes

Optional dependencies:
  asciidoc:    yes
  enscript:    no  (enscript not found)
  mrg: no  (mrg not found)
  Ruby:    yes
  Lua: yes
  Cairo:   yes
  Pango:   no  (usable pango not found)
  pangocairo:  no  (usable pangocairo not found)
  GDKPixbuf:   no  (gdk-pixbuf not found)
  JPEG:    yes
  PNG: yes
  OpenEXR: yes
  rsvg:    yes
  SDL: yes
  libraw:  no  (libraw library not found)
  Jasper:  yes
  graphviz:    no  (graphviz not found)
  avformat:    no  (sufficiently new libavformat / libavcodec or 
libswcale not found)

  V4L: no   (v4l library not found)
  V4L2:    no  (usable libv4l2 not found)
  spiro:   yes
  EXIV:    yes
  gexiv2:  yes
  umfpack: yes
  TIFF yes
  webp:    no  (webp library not found)
  poly2tri-c:  yes (internal)

We have optional dependencies not resolved... it seems that they are 
'optional', correct!

ciao e thanks
americo

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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Jehan,

On 03/02/2018 22:06, Jehan Pagès wrote:

Hi!

On Sun, Feb 4, 2018 at 12:59 AM, Americo Gobbo <jag.rabi...@gmail.com> wrote:

Hi Jehan,
I have used the git repository to build.
config.log is of my traditional environment to gegl
config-new.log is of a ex-novo environment to gegl to test if was making
something wrong in the traditional env.

Both seem fine. pkg-config does not seem to detect any exiv2 in /usr/local/.
Are the build still broken and outputting the same errors?

Jehan

This is final of my 'make' messages:

  CCLD gegl
libtool:   error: cannot find the library '/usr/local/lib/libexiv2.la' 
or unhandled argument '/usr/local/lib/libexiv2.la'

Makefile:571: recipe for target 'gegl' failed
make[2]: *** [gegl] Error 1
make[2]: Leaving directory '/home/jag/devel/gimp-default-master-/gegl/bin'
Makefile:634: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-default-master-/gegl'
Makefile:541: recipe for target 'all' failed
make: *** [all] Error 2
---

In fact the archives are installed in another directory

'/usr/lib/x86_64-linux-gnu/' instead that '/usr/local/lib/'

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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Tobias,
thanks!

On 03/02/2018 08:40, Tobias Ellinghaus wrote:

Am Samstag, 3. Februar 2018, 03:13:18 CET schrieb Americo Gobbo:

Hi All,
I have upgrade my system to ubuntu gnome 16.04.3 and I have tried again
compile GEGL. The 'autogen.sh' is finished OK, without problems.
The 'make' process have these errors messages:

gcc: error: /usr/local/lib/libexiv2.so: No such file or directory
Makefile:571: recipe for target 'gegl' failed
make[2]: *** [gegl] Error 1
make[2]: Leaving directory '/home/jag/devel/gimp-default-master/gegl/bin'
Makefile:634: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-default-master/gegl'
Makefile:541: recipe for target 'all' failed
make: *** [all] Error 2

Someone can give some suggestion?

Is that a fresh git clone or did you compile in the directory before? Maybe
you used to have libexiv2 installed in/usr/local/  and that was picked up by
autofoo in the past and now it still remembers the old location.

Yes, because them are in another directory: /usr/lib/x86_64-linux-gnu
So, how is possible resolve this without 'ln -s', also because it does 
not work?


Linking libraries around (using ln -s, not ld) is not the solution and a
terrible idea.


correct.

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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Partha,
in my system these libraries are in:

/usr/lib/x86_64-linux-gnu/libgexiv2.a
/usr/lib/x86_64-linux-gnu/libgexiv2.so

instead that in '/usr/local/lib/libexiv2.la'

On 03/02/2018 01:46, Partha Bagchi wrote:

Hi Americo,

What does
find / -name "libgexiv*.so"
say?

Since I don't know how your ld.conf is setup, I am trying to guess where
your shared objects are. Once you find them, instead of relying on the
system, you can pass them directly to GIMP/GEGL while making using
LDFLAGS="-L/usr/lib/lib64" etc.

Perhaps I need modify my setup environment?

my setup script is:

less ../setup-master.sh
PREFIX=/opt/gimp-default-master
export PATH=$PREFIX/bin:$PATH
export LD_LIBRARY_PATH=$PREFIX/lib:$LD_LIBRARY_PATH
export XDG_DATA_DIRS=$PREFIX/share:$XDG_DATA_DIRS
export ACLOCAL_FLAGS="-I $PREFIX/share/aclocal"
export PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH
export GIO_EXTRA_MODULES=/usr/lib/x86_64-linux-gnu/gio/modules
export SRC_DIR=$HOME/devel/gimp-default-master/gimp-2.9/build
export CFLAGS='-std=gnu99 -fPIC'
export LESS="-F -X -R"

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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Partha,

~$ pkg-config --libs exiv2
-lexiv2
~$ pkg-config --libs gexiv2
-lgexiv2 -lgobject-2.0 -lglib-2.0

On 03/02/2018 01:27, Partha Bagchi wrote:

I see. So what does

pkg-config --libs exiv2

or

pkg-config --libs gexiv2


say?



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Re: [Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi Partha,
thanks!
So, in my system gexiv2 and exiv2 are installed.

$ sudo apt-get install libexiv2-dev libgexiv2-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libgexiv2-dev is already the newest version (0.10.3-2).
libexiv2-dev is already the newest version (0.25-2.1ubuntu16.04.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

It seems that doesn't find in the folder that the autogen.sh is indicating?

libtool:   error: cannot find the library '/usr/local/lib/libexiv2.la' 
or unhandled argument '/usr/local/lib/libexiv2.la'

Makefile:571: recipe for target 'gegl' failed
make[2]: *** [gegl] Error 1
make[2]: Leaving directory '/home/jag/devel/gimp-default-master/gegl/bin'
Makefile:634: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-default-master/gegl'
Makefile:541: recipe for target 'all' failed
make: *** [all] Error 2

On 03/02/2018 00:32, Partha Bagchi wrote:

Americo,

I don't know about your system, but you need to make sure that you have
gexiv2 and exiv2 (including dev files) installed in your system.

Partha


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[Gimp-developer] GEGL errors during 'make' process

[Americo Gobbo]

Hi All,
I have upgrade my system to ubuntu gnome 16.04.3 and I have tried again compile 
GEGL.
The 'autogen.sh' is finished OK, without problems.
The 'make' process have these errors messages:

gcc: error: /usr/local/lib/libexiv2.so: No such file or directory
Makefile:571: recipe for target 'gegl' failed
make[2]: *** [gegl] Error 1
make[2]: Leaving directory '/home/jag/devel/gimp-default-master/gegl/bin'
Makefile:634: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/jag/devel/gimp-default-master/gegl'
Makefile:541: recipe for target 'all' failed
make: *** [all] Error 2

Someone can give some suggestion?



Thanks
americo
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[Gimp-developer] GEGL compilation in the last git update

[Americo Gobbo]

Hi All,
I am trying to update GIMP devel master and in this moment I have problems to 
update GEGL.
I have resolved the dependencies and mainly gettext.
The final messages that are appearing when I try do 'autogen.sh' are:

Copying file po/remove-potcdate.sin
autoreconf: running: aclocal --force -I m4 ${ACLOCAL_FLAGS}
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.ac:785: error: possibly undefined macro: AC_CHECK_LIB
  If this token and others are legitimate, please use m4_pattern_allow.
  See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1
checking whether make supports nested variables... yes
configure: error: cannot find install-sh, install.sh, or shtool in "." "./.." 
"./../.."


Someone can help me with some suggestion.

Thanks
americo
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[Gimp-developer] last git master of gimp/ is not possible complete the make on my behavior

[Americo Gobbo]

I have problems to compile the last git masters on gimp/.
I have installed locally exiv2 and apparently is OK.
I have applied ./autogen.sh without problems and no messages of dependencies.

But the 'make' is always stop on:
---
Making all in menus
make[2]: Entering directory `/home/jag/devel/gimp-default-master/gimp-2.9/menus'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/jag/devel/gimp-default-master/gimp-2.9/menus'
Making all in libgimpbase
make[2]: Entering directory 
`/home/jag/devel/gimp-default-master/gimp-2.9/libgimpbase'
  CC   gimpmetadata.lo
gimpmetadata.c: In function 'gimp_metadata_get_guid':
gimpmetadata.c:219:7: warning: implicit declaration of function 'timespec_get' 
[-Wimplicit-function-declaration]
   timespec_get (, TIME_UTC);
   ^
gimpmetadata.c:219:26: error: 'TIME_UTC' undeclared (first use in this function)
   timespec_get (, TIME_UTC);
  ^
gimpmetadata.c:219:26: note: each undeclared identifier is reported only once 
for each function it appears in
make[2]: *** [gimpmetadata.lo] Error 1
make[2]: Leaving directory 
`/home/jag/devel/gimp-default-master/gimp-2.9/libgimpbase'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gimp-default-master/gimp-2.9'
make: *** [all] Error 2
---

Someone can help me!

Thanks
americo
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[Gimp-developer] Hardness Control on Pencil Tool - Optimization range and their reasons.

[Americo Gobbo]

I have tested the hardness on pencil tool and actually is not usable as classic 
hardness...The hardness on pencil has the capability to expand the stain... and 
this is could be useful to emulate some bristle effects.

To use in this way is necessary to use the range of hardness >= 80. In fact, in 
this range is possible to use to modify the shapes of traditional bristle concept 
to open or close more or minus the points of bristles.

Now, the full range is really not usable in comfortable way, and mainly, for 
nobody raster brush.
To control this in better way is necessary change the range... what is now [80, 
100] should become [0, 100].

To see the figures related on this thread see the bug report:
https://bugzilla.gnome.org/show_bug.cgi?id=784519

--
Pencil tool context usages
Pixel-art and drawing/painting with precision
The pencil tool is considered commonly to *Pixel-art* and *drawing*, precision 
work and such, but can be used also to *painting*... as  is also possible paint 
with Clone Tool as I have already demonstrated... or rather I don't see a 
convincing reason why for which the Pencil Tool cannot be used to paint.

On Pixel-art, we use hardness = 100 and the raster brushes are adequately thought 
for the pixel-art (and for this scope the brush raster are no affected by the 
hardness), see the *Figure 1* 
[https://bugzilla.gnome.org/attachment.cgi?id=354880]. Also to eventual Color 
brushes to *pixel-art*, after my tests, them are usable only above hardness>75, 
below this value we have strange effects and blur not usable to this specific 
works, see *Figure 2* [https://bugzilla.gnome.org/attachment.cgi?id=354881].
So for the cases, specifically for the *Pixel-art*, the hardness used is equal 
100 (but I supposed because I am not an specialist). To drawing and/or to give 
precision or details is the same thing, the brush pixel must be hard and don't 
have blur effects.

Already in June 2016 I have wrote a email to gimp-developers mailing list with 
an idea to cut this feature of the Pencil Tool... the thread was a long 
discussion, but in my opinion not focused on my request... well explained by 
Elle Stone in her comment here: 
https://mail.gnome.org/archives/gimp-developer-list/2016-June/msg00123.html

--
Problems with hardness range
To exemplify my idea of usage, I have selected two raster brushes of official 
and current brush set, the Bristles 01 and Bristles 03 (Media Set).
The hardness effect on the shape transform it in big black block, quickly, and 
this don't have any practical usage to pixel art, but to painting is possible 
to think some usage as I am proposing here. The current range is demonstrated 
on *Figure 3* [https://bugzilla.gnome.org/attachment.cgi?id=354882] and *Figure 
4* [https://bugzilla.gnome.org/attachment.cgi?id=354883].

If the range [0, 100] would be equivalent of current [80, 100] is more easy 
control the variations and increase the usage possibilities with many kind of 
stains. So, in this case is possible to imagine some creative usage for the 
hardness on Pencil Tool and mainly to digital painting to emulate some 
characteristics of bristle brushes, mainly (at moment was what I have able to 
imagine).

--
Consistency versus Usability
Is clear that to paintbrush, airbrush, eraser and others the current range of 
the hardness has a sense and an evident usage... but for the  Pencil the case 
is completely different... we cannot based on the consistency of the other 
painttools to uphold the same range on Pencil Tool.

Is better think in terms of usability or which is the sense to use a tool with 
difficult and a short range of usage?
Is clear that is possible to use as is the current status... but with difficult 
and not in comfortable way.
Also to control it via dynamics has basically the same problems of control it, 
because the curve must be placed in top and with short range of sensibility, 
see *Figure 5* [https://bugzilla.gnome.org/attachment.cgi?id=354884].

--
Final considerations
If is not possible adequate the hardness range of Pencil Tool, for something 
reasons, I suggest to cut off this feature off Pencil tool and consider 
basically what is document on official GIMP manual about this painttool 
[https://bugzilla.gnome.org/show_bug.cgi?id=767916]. If the choice would be 
this, I think that is more interesting clean completely the sliders of 
'hardness' and 'force' of the Tool Options dialog.
Thanks
americo

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Re: [Gimp-developer] name of the patterns

[Americo Gobbo]

Hi,
for all GIMP assets based on raster (brushes and patterns) we have 
procedures to create them... in these procedures we have the possibility 
to choose a different name to show these assets on the list dialogs. 
Would be interesting to have also the possibility to show this alias 
name in Title & Status.

ciao
americo

On 30-05-2017 14:38, Liam R E Quin wrote:

On Tue, 2017-05-30 at 11:15 +0200, diego nassetti wrote:

[...]
   change the default comment proposed when it is created from
"created by GIMP" to the filename.

I've often contemplated writing a modification that would let you have
a default comment that could have %F (or whatever) for filename and so
on, %W and %H for width and height, as for title and status bar.

It would be expanded on image export if you had not explicitly set a
comment in the image.

Would that help?

Liam




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Re: [Gimp-developer] IRC?

[Americo Gobbo]

Hi,
me too, after the lunch.
but in my case, hexchat was doing something strange... scrolling a big 
list of users.

It seems, that I have seen a message about... being hacking :(
americo

On 11-05-2017 15:17, Jehan Pagès wrote:

Hi,

What's up with the IRC channel?
I just come back from shopping, and now I can't connect.
It says:

20:14 -!- Cannot join to channel #gimp (You must be invited)

Jehan


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[Gimp-developer] Smudge Tool and rate sensibility issues

[Americo Gobbo]

Hi All,
I am interesting to know the usage of Smudge Tool along other branches, as 
Photography, Graphic Design, Digital Painting.
I the thing that I have noted, is that in my digital painting style the Smudge 
Tool is used with the rates localized more in the final range > 75.
So, I would know the experiences with other people with this range.
thanks
americo

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Re: [Gimp-developer] Error Message on Gegl - Last Git Master

[Americo Gobbo]

Hi

On 26-03-2017 13:16, Ell via gimp-developer-list wrote:

Actually, there was an interval where gegl:text would get built without
checking this dependency, so it's possible that this is a leftover from
an earlier build (although that would be weird if this problem only
started recently.)  You can manually remove "text.so" (and make sure
that it's not getting reinstalled by a GEGL "make install") if that's
the case.  It shouldn't be a problem for GIMP for now, but in the long
run it's better to get it built.

Ok, now is Ok!
After LGM I am thinking install a new release of my distro... the 
current, sure is becoming a bit outdated ;-)
To install the new release of Pango is not recommended on my 
ubuntu-gnome 14.04?

thanks
americo

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Re: [Gimp-developer] Error Message on Gegl - Last Git Master

[Americo Gobbo]

Hi Ell

On 26-03-2017 12:53, Ell wrote:

GEGL requires Pango >= 1.38 to build gegl:text since February.  Looks
like Ubuntu 14.04 ships with 1.36.  Either way, this should be picked up
when you configure GEGL.  Is it possible you're building against a newer
version of Pango than the one being picked up at runtime?
I have installed my dependencies directly on my gimp folder because I 
had different dependencies outdated on my distro.
So, to install Pango 1.38 or higher is necessary to install also the 
dependencies of this version?
I have tried install in my 'make' environment the pango-1.38.1, but 
without success and on my ./configure (final part) has these messages:


checking whether the c++ linker (/usr/bin/ld -m elf_x86_64) supports 
shared libraries... yes

checking dynamic linker characteristics... (cached) GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
configure: creating ./config.lt
config.lt: creating libtool
checking for some Win32 platform... no
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for HARFBUZZ... no
checking for CoreText availability... no
checking for CAIRO... yes
checking which cairo font backends could be used... none
configure: Disabling cairo support
configure: error: *** Could not enable any backends.
*** Must have at least one backend to build Pango.
---
Can you help to resolve the steps to follow?
---
If this is complex, another way to resolve this is to do a hard reset on 
my clone... can you send me the commits of each app (babl, gegl, gimp) 
that I must use?

thanks
americo


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[Gimp-developer] 'Make' error compiling last GEGL

[Americo Gobbo]

Hi all, I am trying compile the last gegl and I have error... I have 
tried uninstall all, make clean, git clean -xdf, but is not possible 
complete the make. The error, on the end process,  on my 'make' is that: 
gegl:whirl-pinch 2866b6ada6384bcaa54850761a58484c != 
2a17621265635228f16c1cd28801c4c8 gegl:path 
cf8d1b3419e4c7bfce2a751cf6835b44 != eba13d16fba3284ceee264073ebfa356 
gegl:vector-stroke 49fc1cb75476e33646400a49615c1e3d != 
7220be79a5455bed219cb16661275dd0 gegl:fill-path 
d8368d0086ce301f94edf533e38c7c3d != d0909281920b72afbf399d942e464823 
make[2]: *** [examples] Error 255 make[2]: Leaving directory 
`/home/jag/devel/gimp-default-master/gegl/docs' make[1]: *** 
[all-recursive] Error 1 make[1]: Leaving directory 
`/home/jag/devel/gimp-default-master/gegl' make: *** [all] Error 2
I have many warning during the 'make', with lt-gegl-tester: === ... ** 
(lt-gegl-tester:20096): WARNING **: Failed to set operation type 
gegl:text, using a passthrough op instead ** (lt-gegl-tester:20096): 
WARNING **: Failed to set operation type gegl:text, using a passthrough 
op instead ** (lt-gegl-tester:20096): WARNING **: Failed to set 
operation type gegl:text, using a passthrough op instead gegl:sinus  OK 
** (lt-gegl-tester:20096): WARNING **: Failed to set operation type 
gegl:text, using a passthrough op instead ** (lt-gegl-tester:20096): 
WARNING **: Failed to set operation type gegl:text, using a passthrough 
op instead ** (lt-gegl-tester:20096): WARNING **: Failed to set 
operation type gegl:text, using a passthrough op instead gegl:plasma  OK 
... === My ./autogen.sh is apparently OK. === Building GEGL with 
prefix=/opt/gimp-default-master Optional features:   GEGL docs:   
yes   Build workshop:  no   Build website:   no  (asciidoc not found)   
SIMD:sse:yes mmx:yes   Vala support:yes Optional 
dependencies:   asciidoc:no  (asciidoc not found)   
enscript:no  (enscript not found)   mrg: no  (mrg 
not found)   Ruby:yes   Lua: yes   
Cairo:   yes   Pango:   no  (usable pango not found)   
pangocairo:  no  (usable pangocairo not found)   GDKPixbuf:   
no  (gdk-pixbuf not found)   JPEG:yes   PNG: yes 
  OpenEXR: yes   rsvg:yes   SDL: yes   
libraw:  no  (libraw library not found)   Jasper:  yes   
graphviz:no  (graphviz not found)   avformat:no  
(sufficiently new libavformat / libavcodec or libswcale not found)   
V4L: no   V4L2:yes   spiro:   yes   
EXIV:yes   gexiv2:  yes   umfpack: yes   
TIFF yes   webp:yes   poly2tri-c:  yes 
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[Gimp-developer] Incremental issue behavior

[Americo Gobbo]

In the documentation has wrote that if is enable 'incremental' on tool 
options, the opacity is full always.


"The incremental check-box does not seems to work as everyone expect. If 
it is deactivated (the default value) the maximum effect of a single 
stroke is determined by the opacity set in the opacity slider. If the 
opacity is set to less than 100, moving the brush over the same spot 
will increase the opacity if the brush is lifted in the meantime. 
Painting over with the same stroke has no such effect. If Incremental is 
active the brush will paint with full opacity independent of the 
slider's setting. This option is available for all paint tools except 
those which have a “rate” control, which automatically implies an 
incremental effect."


So, if you have the paint dynamic with Opacity parameter 'on' this is 
not true apparently ;-)
Is possible modeling the behavior of opacity with a different gains... 
for instance, if you use an small rate, around ~10, on 'opacity' slider 
(tool options).
Then, I am not sure if this is correct or is a secondary effect not 
expected... so, this is an emerging feature.

thanks
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Re: [Gimp-developer] High bit depth assets to GIMP 2.10

[Americo Gobbo]

On 22-10-2016 22:50, Americo Gobbo wrote:
Is possible discuss again the possibility to have assets in 16 and 32 
bit, mainly the palettes and patterns.

A short and important addendum the gradients, too.
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[Gimp-developer] High bit depth assets to GIMP 2.10

[Americo Gobbo]

Hi All,
Is possible discuss again the possibility to have assets in 16 and 32 bit, 
mainly the palettes and patterns.
The initial discussion was proposed by Alexandre Prokoudine, in 2014 > 
https://mail.gnome.org/archives/gimp-developer-list/2014-February/msg00050.html
Thanks,
americo

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Re: [Gimp-developer] Pencil - Tool Options and Hardness

[Americo Gobbo]

Thanks,

I don't have understood reading the documentation... is possible to note 
that the tool pencil does more that hard-edge or not anti-aliasing.



On 21-06-2016 12:18, Simon Budig wrote:

The Tool Options of the Pencil and Paintbrush are identical... the unique
>difference is that Pencil don't have antialiasing... so, hard edges.

Note that the pencil tool also avoid non-integer brush coordinates, i.e.
the brushes "snap" to whole pixel positions.


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Re: [Gimp-developer] Pencil - Tool Options and Hardness

[Americo Gobbo]

Hi all,

The Tool Options of the Pencil and Paintbrush are identical... the 
unique difference is that Pencil don't have antialiasing... so, hard edges.


This is the concept of Pencil tool... to have, a Paintbrush with a 
hard-edge option is an option... but, if you can a tool with 
hard-edge... you need also the Hardness disabled... for me it seems a 
paradox condition.
The Paintbrush with hard edge, no antialising, is necessary to have the 
Hardness disabled... so, when I choose hard-edge option (alias Pencil), 
the hardness must appears faded (off).


I prefer to maintain the Pencil... and to cut only the hardness 
parameter of tool options... the Pencil tool is a classic. The unique 
equivocated option in the tool options is the Hardness.


The idea about, if I have understood well, to have not-antialiasing in 
the brush... it seems a bit strange for me, essentially because we can 
do it using hard-edge stains... normally I use the Pencil tool to create 
these stains. Normally, if you have a hard-edge stain, and you need a 
bit more soft stain... we can use the hardness slider and also a curve 
in the paint dynamics to control the hardness.


thanks,
americo

On 21-06-2016 10:17, Pat David wrote:

On Tue, Jun 21, 2016 at 2:50 AM Ofnuts  wrote:


Shouldn't we instead get rid of the pencil tool and add a
no-anti-aliasing option to the brush?


This sounds like a great option.  As CR says, if the only difference is
that one parameter, then it makes sense.
+1


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[Gimp-developer] Pencil - Tool Options and Hardness

[Americo Gobbo]

Hi all,
The Hardness parameter to Pencil Tool is not utilized, but is present in its 
Tool Options. Reading the documentation: “The Pencil tool is used to draw free 
hand lines with a hard edge. The pencil and paintbrush are similar tools. The 
main difference between the two tools is that although both use the same type 
of brush, the pencil tool will not produce fuzzy edges, even with a very fuzzy 
brush. It does not even do anti-aliasing.”
If I have reason, I suggest delete the hardness Pencil parameter on tool 
options, to avoid mistakes/misleading on the UI.
Thanks,
americo

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Re: [Gimp-developer] mypaint brushes - gimp git master

[Americo Gobbo]

Some new info...


Error opening GIMP Git Master:
$:/opt/gimp-default-master/bin$ ./gimp-2.9
This is a development version of GIMP.  Debug messages may appear here.

gimp-2.9: mypaint-brush.c:239: mypaint_brush_set_base_value: Assertion `id >= 0 && 
id < MYPAINT_BRUSH_SETTINGS_COUNT' failed.
./gimp-2.9: terminated: Aborted

If you have shared the folder of mypaint brushes with GIMP Git Master... and 
you upload a new set... in MyPaint... when you try open GIMP it is aborted.
The error happens only with the sets... create a new brush in sets already 
present don't happens problems.
I am using MyPaint 1.2, from git and my folder brushes is in the my Home > 
.local/share/mypaint/brushes
If you create a new group directly on MyPaint is OK, and GIMP opening 
normally.
If you try import a new set on MyPaint, when you try to open GIMP... is 
aborted.

Thanks

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[Gimp-developer] mypaint brushes - gimp git master

[Americo Gobbo]

Error opening GIMP Git Master:
$:/opt/gimp-default-master/bin$ ./gimp-2.9
This is a development version of GIMP.  Debug messages may appear here.

gimp-2.9: mypaint-brush.c:239: mypaint_brush_set_base_value: Assertion `id >= 0 && 
id < MYPAINT_BRUSH_SETTINGS_COUNT' failed.
./gimp-2.9: terminated: Aborted

If you have shared the folder of mypaint brushes with GIMP Git Master... and 
you upload a new set... in MyPaint... when you try open GIMP it is aborted.
The error happens only with the sets... create a new brush in sets already 
present don't happens problems.
I am using MyPaint 1.2, from git and my folder brushes is in the my Home > 
.local/share/mypaint/brushes

The GIMP git master commit 8ac1e40
DE Gnome 3.10 - ubuntu gnome 14.04.2

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Re: [Gimp-developer] Error during Make - Last update of Git Master, today

[Americo Gobbo]

Thanks Partha,
now I have had success on 'make'
ciao e grazie,
americo

On Wed, Jun 8, 2016 at 6:17 PM, Partha Bagchi <parth...@gmail.com> wrote:

> I just had this conversation with Mitch. Just do the following
>
> touch libgimp/gimpenums.h
>
>
> and do make again.
>
> Hope that helps.
>
>
> On Wed, Jun 8, 2016 at 4:32 PM, Americo Gobbo <jag.rabi...@gmail.com>
> wrote:
>
>> On Wed, Jun 8, 2016 at 1:33 PM, Michael Schumacher <schum...@gmx.de>
>> wrote:
>>
>> > Hi Americo,
>> >
>> > pasting this to https://paste.gnome.org/ will make it much easier to
>> > access.
>> >
>>
>>
>> Hi Michael,
>> I have updated now GIMP git master, but yet is with error on make.
>> https://paste.gnome.org/pl0wgxbiu
>> Thanks
>> americo
>>
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>
>
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Re: [Gimp-developer] Error during Make - Last update of Git Master, today

[Americo Gobbo]

Hi Michael
I have controlled, and effectively... this file is not present on
/libgimpconfig/
Normally... I control the commits of gimp git master on gnome website.
I use normally to sincronize the 'git pull -r'

gimpenums.c:8:49: fatal error: libgimpconfig/gimpcolorconfig-enums.h: No
> such file or directory
>  #include "libgimpconfig/gimpcolorconfig-enums.h"
>

Thanks
americo


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Re: [Gimp-developer] Error during Make - Last update of Git Master, today

[Americo Gobbo]

On Wed, Jun 8, 2016 at 1:33 PM, Michael Schumacher  wrote:

> Hi Americo,
>
> pasting this to https://paste.gnome.org/ will make it much easier to
> access.
>


Hi Michael,
I have updated now GIMP git master, but yet is with error on make.
https://paste.gnome.org/pl0wgxbiu
Thanks
americo

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[Gimp-developer] Error during Make - Last update of Git Master, today

[Americo Gobbo]

Hi all,
I have update GIMP Git master (git pull -r) but the 'make' is presenting
error.

Make output: https://goo.gl/38ykFt
I run again ./autogen.sh and ./configure... all is ok, prefix too.

My DE is GNOME 3.10
Ubuntu Gnome 14.04.2
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[Gimp-developer] Delay with 'Lock brush size to zoom' feature enabled - 2.9.3 GIMP Git Master

[Americo Gobbo]

Hi All,
I am testing the feature 'Lock brush size to zoom' and I have noted when is
enabled is causing delays in the stroking processing... it is normal?
My DE is GNOME 3.10, Ubuntu Gnome 14.04.2 with 8Gb in memory.
GIMP is working normally with opencl.
thanks
americo
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[Gimp-developer] Error on make of 'gimp' and 'gegl' with last update of Gimp 2.9.3 Git Master

[Americo Gobbo]

I have finding problems to compile the last git master.
Thanks

---
GIMP
Error make of 'gimp' with last update
make[4]: Leaving directory `/home/jag/devel/gimp-2.9/app/gui'
Making all in .
make[4]: Entering directory `/home/jag/devel/gimp-2.9/app'
  CC   version.o
  CC   gimp_console_2.9-version.o
  CCLD gimp-console-2.9
  AR   libapp.a
  CCLD gimp-2.9
/opt/lib/libgegl-0.3.so: undefined reference to
`g_type_check_instance_is_fundamentally_a'
collect2: error: ld returned 1 exit status
make[4]: *** [gimp-console-2.9] Error 1
make[4]: *** Waiting for unfinished jobs
/opt/lib/libgegl-0.3.so: undefined reference to
`g_type_check_instance_is_fundamentally_a'
collect2: error: ld returned 1 exit status
make[4]: *** [gimp-2.9] Error 1
make[4]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gimp-2.9'
make: *** [all] Error 2

---
GEGL
Error make of 'gegl' with last update
make[2]: Entering directory `/home/jag/devel/gegl/gegl'
Making all in buffer
make[3]: Entering directory `/home/jag/devel/gegl/gegl/buffer'
  CC   gegl-buffer.lo
  CC   gegl-buffer-access.lo
  CC   gegl-buffer-iterator.lo
  CC   gegl-buffer-cl-iterator.lo
gegl-buffer-access.c:24:25: fatal error: glib-object.h: No such file or
directory
 #include 
 ^
compilation terminated.
gegl-buffer.c:36:25: fatal error: glib-object.h: No such file or directory
 #include 
 ^
compilation terminated.
gegl-buffer-cl-iterator.c:24:25: fatal error: glib-object.h: No such file
or directory
 #include 
 ^
compilation terminated.
gegl-buffer-iterator.c:25:25: fatal error: glib-object.h: No such file or
directory
 #include 
 ^
compilation terminated.
make[3]: *** [gegl-buffer-access.lo] Error 1
make[3]: *** Waiting for unfinished jobs
make[3]: *** [gegl-buffer-cl-iterator.lo] Error 1
make[3]: *** [gegl-buffer.lo] Error 1
make[3]: *** [gegl-buffer-iterator.lo] Error 1
make[3]: Leaving directory `/home/jag/devel/gegl/gegl/buffer'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/jag/devel/gegl/gegl'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gegl'
make: *** [all] Error 2
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Re: [Gimp-developer] Last GIMP Git Master - Error on Make

[Americo Gobbo]

On Tue, Feb 16, 2016 at 2:00 AM, Owen  wrote:

> Well just built, according to the splash screen, commit c94e87e no
> problems.
>
>
> have you tried a git clean -xdf and rebuild?
>


No I don't have try the git clean,
but I did a make clean and autogen.sh again in all environment, babl, gegl
and gimp... and were possible to complete the make on gimp.
Thanks
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[Gimp-developer] Last GIMP Git Master - Error on Make

[Americo Gobbo]

I have pulled the last git master... the make on GEGL and babl are ok.
But on GIMP, I have this error on make:

make[4]: *** No rule to make target `/usr/include/_G_cmnfig.h', needed by
`gimpmessagebox.o'.  Stop.
make[4]: *** Waiting for unfinished jobs
  CC   gimpmenufactory.o
make[4]: Leaving directory `/home/jag/devel/gimp-2.9/app/widgets'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gimp-2.9'
make: *** [all] Error 2
$:~/devel/gimp-2.9$ git pull -r
Current branch master is up to date.

Thanks,
americo
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[Gimp-developer] gimp-developer-list

[Americo Gobbo]

Hi all,
I am trying compile the last git master, today... but I find these errors
com gimp compile:

$: ~/devel/gimp-2.9$ make -j4
make  all-recursive
make[1]: Entering directory `/home/jag/devel/gimp-2.9'
Making all in m4macros
make[2]: Entering directory `/home/jag/devel/gimp-2.9/m4macros'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/m4macros'
Making all in cursors
make[2]: Entering directory `/home/jag/devel/gimp-2.9/cursors'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/cursors'
Making all in icons
make[2]: Entering directory `/home/jag/devel/gimp-2.9/icons'
Making all in Color
make[3]: Entering directory `/home/jag/devel/gimp-2.9/icons/Color'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/home/jag/devel/gimp-2.9/icons/Color'
Making all in Symbolic
make[3]: Entering directory `/home/jag/devel/gimp-2.9/icons/Symbolic'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/home/jag/devel/gimp-2.9/icons/Symbolic'
Making all in Symbolic-Inverted
make[3]: Entering directory
`/home/jag/devel/gimp-2.9/icons/Symbolic-Inverted'
ln -s ../../icons/Symbolic/12/gimp-default-colors.png
12/gimp-default-colors.png
ln: failed to create symbolic link ‘12/gimp-default-colors.png’: File exists
make[3]: *** [12/gimp-default-colors.png] Error 1
make[3]: Leaving directory
`/home/jag/devel/gimp-2.9/icons/Symbolic-Inverted'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/icons'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gimp-2.9'
make: *** [all] Error 2
$:~/devel/gimp-2.9$ git pull -r
Current branch master is up to date.


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[Gimp-developer] Redesign the current GIMP brush set to 2.10

[Americo Gobbo]

some years ago, in 2013... I have begun the process of redesign of all
brushes of GIMP 2.8+. The idea was organize a set to the next GIMP release.

This work was suggested by Guillermo Espertino... I think, that the
Prokoudine knew the project through the my g+ account.

I had, in this period, the support of some artists, in Brazil (Mozart
Couto), Argentina (Gustavo Deveze) and in Slovakia (Lubomir Zabadal).
The project was stopped because I do not have any response...

Recently I have writing about this to Patrick and he suggests me to try
publish something here.
Well the link of the project is here:
https://medium.com/graphic-arts-free-software/official-gimp-brushes-redesign-f723f2f44945

I think interesting to have their opinions and to know if this project is
interesting to GIMP.
If yes, how is possible to organize a group or the tasks around this issue?
Thanks
americo

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Re: [Gimp-developer] Redesign the current GIMP brush set to 2.10

[Americo Gobbo]

There is possible to read a post with draft plan to redesign the brushes:
https://medium.com/graphic-arts-free-software/gimp-2-9-set-brushes-810baff9431b
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>
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Re: [Gimp-developer] WGO Update Status

[Americo Gobbo]

Hi,
I've began now read some of these old posts... are very interesting and
they are put an interesting light in the application name question... many
times I did read in this mailing list discussions very interesting about
this issue.
My suggestion is to create some anchored links from the 'introduction.html'
or a bracket, e.g. [to know more about GIMP acronym] to the the
'ancient_history.html' where was decided the name.

On Mon, Oct 5, 2015 at 5:32 PM, Pat David  wrote:

> http://www.gimp.org/about/ancient_history.html
> 
>
> http://www.gimp.org/about/introduction.html
> 
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[Gimp-developer] Applies on Tool Preset Editor - default setting

[Americo Gobbo]

Hi all,
where the default configuration of all applies on the Tool Preset Editor
are written?
[image: Inline image 1]
If you open GIMP... and don't have anything selected on the Tool Presets
dialog (list) the Tool Preset Editor is with all applies on 'yes' except
the first for FG/BG.
This default is global preference where the user can modify?
thanks,
americo

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[Gimp-developer] Last Git Master and compilation errors

[Americo Gobbo]

Hi all,
The last git master of GIMP 2.9 is with these errors on my make step.
---
cc1: some warnings being treated as errors
make[4]: *** [gimpdrawable.o] Error 1
make[4]: Leaving directory `/home/jag/devel/gimp-2.9/app/core'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/jag/devel/gimp-2.9/app'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jag/devel/gimp-2.9'
make: *** [all] Error 2
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Re: [Gimp-developer] Last Git Master and compilation errors

[Americo Gobbo]

On Tue, Sep 8, 2015 at 10:30 PM, Jehan Pagès 
wrote:

> You don't paste the interesting part of the output (the part with the
> warnings/errors!).
>
> Anyway I added today some new warning flags for compilation, but one
> of them was outputting far too much unwanted warnings on some systems,
> so I disabled it again. I'm not sure if that could have been your
> problem, since these should be warnings only, not errors. But anyway,
> you can pull the source and try again now. Maybe it will solve your
> build issue.
>
> Jehan
>

Ok, thanks, now is fine.
But to capture the output of warning errors... I need redirect the make
terminal messages to txt file, for example: make > terminal-messages?
americo
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Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

Michael, is working fine! I've tested with and no rulers and the
performance is equal!
Thanks.


J. Americo Gobbo [Illustrator and Painter]
Website <http://americogobbo.com.br> | Blog
<http://americogobbo.blogspot.com> | Flickr <http://flickr.com/rabisco> |
Pinterest <http://www.pinterest.com/americogobbo/> | Twitter
<http://twitter.com/rabisco> | Facebook
<http://www.facebook.com/americogobbo>


On Sun, Sep 6, 2015 at 6:49 PM, Michael Henning <dra...@darkrefraction.com>
wrote:

> Please update to latest gimp master and test. I think I fixed this.
>
> commit 3233a70bae756e8f62fb144cbce9d8f84ed25609
> Author: Michael Henning
> Date:   Sun Sep 6 00:05:32 2015 -0400
>
> libgimpwidgets: Avoid updating the rulers too often.
>
> Ever since 72617e42b, whenever the user generated a lot of mouse
> input, we would constantly queue redraws to the rulers. These redraws
> had a higher idle priority than updating the canvas, so we would
> rarely get around to canvas updates, which made certain tools
> (painting with dynamics, the blend tool) feel very unresponsive.
>
> This fixes it by only redrawing the rulers if the mouse has moved
> far from the last location, or if there are no idle handlers with
> a priority above LOW.
>
> From,
>drawoc
>
> On Sun, Sep 6, 2015 at 3:00 PM, Americo Gobbo <jag.rabi...@gmail.com>
> wrote:
>
>>
>> On Sun, Sep 6, 2015 at 3:04 PM, Richard <strata_ran...@hotmail.com>
>> wrote:
>>
>>> IIRC, this was previously discussed on the mailing list (and bugzilla)
>>> and the cairo library was identified as a culprit/accessory to the lag --
>>> as some users reported downgrading to a previous libcairo fixes the ruler
>>> lag.
>>>
>>> However, it also appears to have been properly fixed as of mid-August:
>>> https://bugzilla.gnome.org/show_bug.cgi?id=736411#c39
>>> <https://bugzilla.gnome.org/show_bug.cgi?id=736411>
>>>
>>
>> Thanks Richard, but it seems all OK are to windows... on my linux box the
>> problem is resolved only without rulers.
>>
>> I work only on linux, and in this box I've two GIMP, the stable 2.8.14
>> (otto ppa) and and the 2.9 devel (last git master). My box is ubuntu
>> gnome 14.04.2 - 64-bit. Memory 8Gb, Intel® Core™ i5-3570K CPU @ 3.40GHz ×
>> 4, Gallium 0.4 on AMD CAICOS.
>>
>> The 2.9 first of the patch of Michael Henning in August 11, was working
>> well with the rulers.
>> The 2.8.14 stable - ppa otto, is working well.
>>
>> git log on my 2.9 git master >
>>
>> commit 72617e42b426e6788c075539a20df7365d2cf102
>> Author: Michael Henning <dra...@darkrefraction.com>
>> Date:   Tue Aug 11 16:20:59 2015 -0400
>>
>> Bug 736411 - Ruler updates cause slowdown when painting
>>
>> We now avoid drawing rulers in the position property setter and use
>> gtk's region invalidation instead. Previously, we were basically
>> redrawing the ruler inside the mouse event handler, which is pure
>> evil.
>>
>> thanks
>>
>
>
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Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

Michael is necessary write a bug report?
Thanks

On Sat, Sep 5, 2015 at 3:30 PM, Americo Gobbo <jag.rabi...@gmail.com> wrote:

>
> On Sat, Sep 5, 2015 at 2:55 PM, Michael Henning <dra...@darkrefraction.com
> > wrote:
>
>> Does this issue clear up if you disable the rulers (by unchecking View ->
>> Show Rulers)? If so, it's probably my fault.
>
>
> Yes, without rulers works fine!
>
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Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

On Sun, Sep 6, 2015 at 3:04 PM, Richard  wrote:

> IIRC, this was previously discussed on the mailing list (and bugzilla) and
> the cairo library was identified as a culprit/accessory to the lag -- as
> some users reported downgrading to a previous libcairo fixes the ruler lag.
>
> However, it also appears to have been properly fixed as of mid-August:
> https://bugzilla.gnome.org/show_bug.cgi?id=736411#c39
> 
>

Thanks Richard, but it seems all OK are to windows... on my linux box the
problem is resolved only without rulers.

I work only on linux, and in this box I've two GIMP, the stable 2.8.14
(otto ppa) and and the 2.9 devel (last git master). My box is ubuntu gnome
14.04.2 - 64-bit. Memory 8Gb, Intel® Core™ i5-3570K CPU @ 3.40GHz × 4,
Gallium 0.4 on AMD CAICOS.

The 2.9 first of the patch of Michael Henning in August 11, was working
well with the rulers.
The 2.8.14 stable - ppa otto, is working well.

git log on my 2.9 git master >

commit 72617e42b426e6788c075539a20df7365d2cf102
Author: Michael Henning 
Date:   Tue Aug 11 16:20:59 2015 -0400

Bug 736411 - Ruler updates cause slowdown when painting

We now avoid drawing rulers in the position property setter and use
gtk's region invalidation instead. Previously, we were basically
redrawing the ruler inside the mouse event handler, which is pure evil.

thanks
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Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

On Sat, Sep 5, 2015 at 2:55 PM, Michael Henning 
wrote:

> Does this issue clear up if you disable the rulers (by unchecking View ->
> Show Rulers)? If so, it's probably my fault.


Yes, without rulers works fine!
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[Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

Hi all,
I've noted yesterday that something is changed on the behaviour of brushes
with GIMP 2.9 - last git master commit 0593eaa. The brush stroke with a
paint dynamic or not the stroke it is delaying in heavy way.
I've made two videos to make a comparison with same conditions - same brush
and paint dynamics.

My box is ubuntu gnome 14.04.2 - 64-bit.
Memory 8Gb, Intel® Core™ i5-3570K CPU @ 3.40GHz × 4, Gallium 0.4 on AMD
CAICOS.

---
The short video with GIMP 2.8
https://youtu.be/hP7qH02Ohhw

The short video with GIMP 2.9
https://youtu.be/_a4kchvSAvw

---
Thanks
americo
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Re: [Gimp-developer] Brush + Paint Dynamic - performance problems and comparison between 2.9 and 2.8.14.

[Americo Gobbo]

On Fri, Sep 4, 2015 at 9:45 PM, Americo Gobbo <jag.rabi...@gmail.com> wrote:

> The short video with GIMP 2.9
> https://youtu.be/_a4kchvSAvw
>

Problems with the video... now is OK, see the new:
https://youtu.be/3hEzQO5mp_g

Sorry ;-)
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Re: [Gimp-developer] Digital Painting and GIMP

[Americo Gobbo]

Thanks Adrian to resolve the .gih velocity parameter.
I need a bit more discussion around the preset bug...[
https://bugzilla.gnome.org/show_bug.cgi?id=731279] that is, in part, a UI
problem.
I think that is possible to resolve it... perhaps a patch: the save button
need use the current values and settings present on Tool Options.
This flow is a bit complex and I think that the last comment that I had is
optimal to understand the problem. Do you have time to discuss it?
Bye
americo
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[Gimp-developer] Digital Painting and GIMP

[Americo Gobbo]

I've noted that the main stream of the discussion is almost all about
Photography.
I'm interested to supply GIMP with some advances and improvement to Digital
Painting. I'm working on the GIMP brushes, statics and mainly the dynamic
brushes since 2007~08.
Some of these brushes are the current stable release and on the git master.
With GIMP 2.8.+ I've began study the paint dynamics to emulate some
difficult techniques like watercolor and other techniques around or with
some impasto quality.
Since 2012~13 with other artists we're beginning study the paint dynamics
and howto build good presets and good brushes... These artists including me
are: Mozart Couto (illustrator and cartoonist, Brazil), Gustavo Deveze
(artist and cartoonist, Argentina), Elias De Carvalho (Illustrator,
Brazil), L'ubomir Zabadal (artist e Art adjunct professor, Nitra
University, Slovakia).
Something around these steps already knew to Prokoudine mainly.
Many of these works and tests I've been publishing on my g+ account...
these is the collections around this theme to GIMP since 2014:
https://plus.google.com/+AmericoGobbo/posts/Xg2FAoELk46

I've promised to Prokoudine the tutorials around the painting techniques
since last year when I've began writing many things to many techniques and
how to use the current tools set to improve the quality of the painting.
All these studies series need of the good presets and a bug around the
workflow of this instance is the great problem if we think to distribute
these presets...
https://bugzilla.gnome.org/show_bug.cgi?id=731279

The recent studies around the wet and bloom effect are very interesting and
it is possible only using the .gih brushes + paint dynamic + some tool
options features... you can see here:
https://plus.google.com/+AmericoGobbo/posts/LjjinvWAF8W

Another bug very critical for me is with the velocity parameter of .gih
brushes that don't working. My approach is using also the .gih brushes and
is important this kind brush will be working well.
https://bugzilla.gnome.org/show_bug.cgi?id=748472

I wait some note or comment about this and if is possible to resolve these
bugs to think begin to publish the tutorial around painting techniques with
GIMP.

My works and illustrations are all made with GIMP and MyPaint.
Now I'm working and testing many instances on the GIMP git master to all
different approaches around Digital Painting.

http://americogobbo.com.br

The bugs are present in the the 2.8.14 and the current git master.
Thanks.
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[Gimp-developer] GIMP devel git master x Krita - canvas rotation performances and relationship with ubuntu-gnome 14.04.1

[Americo Gobbo]

I've some problems with the performance with GIMP on my box and I made a
small video to show the performance of GIMP canvas rotation together Krita
2.9.1 to have a comparison.

Some infos to understand better:
Gimp devel git master installed on ubuntu gnome 14.04.1, i5, 8GB memory.
AMD card with proprietary drivers enabled.

I've noted that on my ambient GIMP has a bit problem to do the fluid canvas
rotation.
Talked with João Bueno, he made the same test on similar hardware
configuration (i5, 8Gb memory), but with a big format, on Fedora KDE with
the two apps and are an optimal and fluid canvas rotation. On João Fedora
KDE box the image test was 3500 x 34900 px, i5 com 8GB, GPU intel and free
driver.
In my case I'm using the AMD video-card Gallium 0.4 on AMD CAICOS with 1Gb
Memory, on Bueno Box he's using the mainboard video chipset of intel.

Well I think that is very critical the relation between GIMP and current
ambient on ubuntu-gnome 14.04.+ and versus card boardproprietary drivers.

How is possible to build an optimal ambient to GIMP on gnome UI using the
opensource free drivers?

Now with the new possibilities of GIMP 2.10 is very important to build an
advices series advices concerning the video card or not, libraries and
minimal requisites to use GIMP with an optimal or ideal performance.

https://www.youtube.com/watch?v=b6bO8xS9zds

*Other notes about Opencl enable and not on GIMP.*
If the Opencl is enabled, the cpus is used more massive way than Krita with
enable OpenGL on their preferences.
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Re: [Gimp-developer] GIMP devel git master x Krita - canvas rotation performances and relationship with ubuntu-gnome 14.04.1

[Americo Gobbo]

On Mon, Mar 30, 2015 at 12:03 PM, Americo Gobbo jag.rabi...@gmail.com
wrote:

 Now with the new possibilities of GIMP 2.10 is very important to build an
 advices series advices concerning the video card or not, libraries and
 minimal requisites to use GIMP with an optimal or ideal performance.


I've ask to ldd the libraries used of gimp-2.9: http://pastebin.com/BA0BYnRF
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[Gimp-developer] Some tests with Cage Transformation and around Handles and n-handles transformations - comparison with Krita features

[Americo Gobbo]

Hi,
I've thought useful to make an simultaneous comparison of the Cage Tool on
Gimp 2.9 (commit ef08e69) and Krita 2.9. The version of Gimp 2.9 devel
unstable is version - commit ef08e69 and Krita the 2.9.0 - ubuntu gnome
14.04.2 | Intel(R) Core(tm)2 Quad CPU Q8400 @ 2.66GHz × 4 | 8Gb Memory | Gallium
0.4 on AMD CAICOS with xorg-driver

I think that the *handles* and *n-handles* transformation an good way to
transform... but the *Cage tool* is a way to resolve many situations...
perhaps mixed with the new transform tools, currently in progress on
*Playground* Stage.

The Cage tool for me is a kind swiss-knife... the current version would be
better with a rotation feature on the area of selected handles.

On the video is possible to see how to works on Krita and how is a bit
difficult to resolve the same task on Gimp with the current selected
handles.
I've noted also that the handles on Handle and n-handles transformations is
a bit difficult to control the single handle... some times the handle is
very sensitive and makes the transformation out control.

On the Krita Warp transformation the handle have an arm extensible to
control the deformation, very interesting way to control the accuracy of
deformation...

https://www.youtube.com/watch?v=aJUpQFieodA

Thanks,
americo
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