Re: [Gimp-developer] RGB to YMCK conversion

2008-11-03 Thread Tor Lillqvist
 all colors can be specified with light wavelength measures isn't that true? 
 can't it be that instead of RGB color you say
 light color wavelength instead?

Not at all. There are lots of coloursthat are not equivalent to that
of visible light of some single wavelength. Just think of purple.

The term colour as used here means colour as perceived by a human
with normal colour vision . Without referring to some animal's
perception (or technical sensor's), the term colour is meaningless,
and what actually exists in the physical sense is a spectrum of
(visible) light wavelengths.

Only so-called spectral colours (which are a very limited subset of
the colours we can perceive) correspond to a specific wavelength of
visible light. Read up on colour perception. For instance, start with
http://en.wikipedia.org/wiki/Color ,
http://en.wikipedia.org/wiki/Spectral_color ,
http://en.wikipedia.org/wiki/Color_vision ,
http://en.wikipedia.org/wiki/CIE_1931_color_space and
http://en.wikipedia.org/wiki/Purple .

Ideally and simplified, for single largish fields of uniform colour,
idealistic colour models as RGB or CMYK are as far as I know
equivalent. But that is not what usually is meant when talking about
CMYK support in software like GIMP. CMYK is used to describe colours
in images as printed by actual physical processes on paper. In that
context there are lots of very arcane and small-scale additional
details that affects how the image end up looking. Think of issues as
how well different inks can cover each other, how inks spreads onto
the paper, what the colour of the actual paper itself is, how much ink
can be printed before the paper cannot absorb any more and the ink
starts to smear or whatever, etc. I am really no expert in this, but I
do know enough that I understand this is not anything trivial;)

--tml
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Re: [Gimp-developer] Better grouping of layer modes

2008-11-03 Thread Martin Nordholts
Martin Nordholts wrote:
 One have to differentiate between mathematical similarities of the
 blending formulas and the effect the modes have on the colours we
 perceive. From this point of view Multiply pairs better when Screen than
 with Divide.

 Actually from this point of view Divide and Subtract should probably be
 moved to the Difference category. They can produce completely new
 colours as well. Addition doesn't really have a counterpart (Addition is
 Linear Dodge in PS and GIMP has no Linear Burn counterpart).
   

After doing the rearrangements we end up with the following groups.
Things to note is that Addition does not have a counterpart, and that
Divide is a bit of an outsider in its group when looking at the blending
formulas. If no one objects, the grouping at the end of this mail is
what I will commit.

/ Martin



Normal
Dissolve

Lighten Only
Screen
Dodge
Addition

Darken Only
Multiply
Burn

Overlay
Soft light
Hard light

Difference
Subtract
Grain extract
Grain merge
Divide

Hue
Saturation
Color
Value
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[Gimp-developer] make the layer name still

2008-11-03 Thread [EMAIL PROTECTED]
hi guys and girls :)

I know that adding grouping of layers requires recreating of xcf format.
Working on dozens of layers requires lots of attention and good sense of
orientation. ;) I've found another inconvenience. Namely: suppose that
we have 50 layers (nothing unusual), current layer is at the bootom of
the layer window and we don't know what is the name of the layer that we
want - presumebly we didn't named it. But we can see the object we want
on the canvas - e.g. an icon. We are clicking on it and on the layer
window the appropriate name appears for a while. This is bad solution:

As far as we know the name, we still have to scroll the slider to reach
it. So what is my purpose? Could we add another shortcut to make the
layer name still? For example right button click. It would make my life
easier. :)

So let's summarize:

Clicking on canvas shows adequate layer name in layer window.
Releasing LMB returns to our current layer.

Clicking on canvas shows adequate layer name in layer window. (LMP
is still holded) Right mouse click doesn't return to current layer but
remains at layer that we clicked.

What do you think about it? The thing is that working on dozens of
layers is really horrible. 


ps
I hope I made myself clear :)

best regards,
Wojtek Ryrych
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Re: [Gimp-developer] make the layer name still

2008-11-03 Thread Martin Nordholts
[EMAIL PROTECTED] wrote:
 hi guys and girls :)

 As far as we know the name, we still have to scroll the slider to reach
 it. So what is my purpose? Could we add another shortcut to make the
 layer name still? For example right button click. It would make my life
 easier. :)

Hi!

Edit - Preferences - Tool Options - Move Tool, Set layer or path as
active

Then you can select layers with the Move Tool.

BR,
Martin
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Re: [Gimp-developer] Dropping two images from Gqview -- Gimp

2008-11-03 Thread Alexandre Prokoudine
On Sat, Nov 1, 2008 at 9:48 AM, Brendan wrote:

 When dropping two images from GQView to the Gimp Empty Image Window...I get
 two layers in one image...Huh? Is this on purpose? Wouldn't it be more
 rational to open two images, and not combine them into an image with two
 layers?

Oh, it wouldn't. Both use cases (opening as separate images and
merging into one) are perfectly valid.

In Qtpfsgui a similar case is solved by asking a user what he intends
to do with several images that are dropped into the window - open each
one separately or merge into one HDR image.

Alexandre
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Re: [Gimp-developer] investment

2008-11-03 Thread Alexandre Prokoudine
On Sun, Nov 2, 2008 at 7:58 PM,  weskaggs wrote:

 I think it would be impossible to give any sort of full answer to this
 without
 more information. Are you talking about a level of support that would:

 1) allow somebody like Sven or Mitch to work full-time on a project if
 they wanted to

Probably no, but I will have a clearer picture by the end of the month.

 or 2) allow somebody like Sven or Mitch to work on it part-time

Yes, that's what we have in mind

 or 3) bring in an inexperienced person to work full time for a while

Possible, but not really great (just in case, I do think of successful
past GSoC students as of experienced persons).

 or 4) support multiple people working nearly-full-time for an extended
 perior

Yes, depends on their skills

 or 5) support a student over a few months, like GSOC?

This is possible too, except I'm talking about several *ambitious*
projects, which probably are not something in the lines of usual GSoC
level tasks.

 Quite obviously the sort of project that would be feasible depends on
 which of these scenarios you have in mind.

I don't see a reason why there couldn't be a combination of 2 and 4
(and 5) cases, if that would fit development cycle and usability
team's schedule.

Alexandre
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Re: [Gimp-developer] Dropping two images from Gqview -- Gimp

2008-11-03 Thread Martin Nordholts
Brendan wrote:
 When dropping two images from GQView to the Gimp Empty Image Window...I get 
 two layers in one image...Huh? Is this on purpose? Wouldn't it be more 
 rational to open two images, and not combine them into an image with two 
 layers? Maybe I'm missing something, or this was unintended...
   

Hi!

Dropping on the Emtpy Image Window opens as layers (just as dropping on
an already open image).

To open them as separate images, drop on the toolbox instead.

BR,
Martin
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Re: [Gimp-developer] Dropping two images from Gqview -- Gimp

2008-11-03 Thread Alexandre Prokoudine
On Tue, Nov 4, 2008 at 1:35 AM, Martin Nordholts wrote:

 Dropping on the Emtpy Image Window opens as layers (just as dropping on
 an already open image).

 To open them as separate images, drop on the toolbox instead.

Doh! This should go to user manual for 2.6+ :-) Thanks for telling!

Alexandre
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Re: [Gimp-developer] Better grouping of layer modes

2008-11-03 Thread Martin Nordholts
Martin Nordholts wrote:
 Martin Nordholts wrote:
   
 After doing the rearrangements we end up with the following groups.
 Things to note is that Addition does not have a counterpart, and that
 Divide is a bit of an outsider in its group when looking at the blending
 formulas. If no one objects, the grouping at the end of this mail is
 what I will commit.
   

Commited now to trunk, rev 27540:

2008-11-03  Martin Nordholts  [EMAIL PROTECTED]

* app/widgets/gimpwidgets-constructors.c
(gimp_paint_mode_menu_new): Arrange layer modes into more logical
and useful groups.

/ Martin



 Normal
 Dissolve

 Lighten Only
 Screen
 Dodge
 Addition

 Darken Only
 Multiply
 Burn

 Overlay
 Soft light
 Hard light

 Difference
 Subtract
 Grain extract
 Grain merge
 Divide

 Hue
 Saturation
 Color
 Value


   
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Re: [Gimp-developer] Dropping two images from Gqview -- Gimp

2008-11-03 Thread Alec Burgess


Alexandre Prokoudine ([EMAIL PROTECTED]) wrote (in part)  
(on 2008-11-03 at 17:39):

  Dropping on the Emtpy Image Window opens as layers (just as
 dropping on
   an already open image).
  
   To open them as separate images, drop on the toolbox instead.

 Doh! This should go to user manual for 2.6+  :-)  Thanks for telling!


As a Windows user had never heard of Gqview (though I see there is a 
Windows port available)


Original post appears to be equivalent to dragging multiple files from 
Windows Explorer. If attempting this it is (IMO) important to set 
Preferences-Window Management-Hint for toolbox to [Normal window]. If 
its' hint is set to [Utility window] then nothing appears on the taskbar 
and the Toolbox is likely to be hidden making it AFAICT impossible to 
drag multiple files and have them open as separate images.


--
Regards ... Alec   ([EMAIL PROTECTED]  WinLiveMess - [EMAIL PROTECTED])


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Re: [Gimp-developer] Dropping two images from Gqview -- Gimp

2008-11-03 Thread Sven Neumann
Hi,

On Mon, 2008-11-03 at 23:35 +0100, Martin Nordholts wrote:
 Brendan wrote:
  When dropping two images from GQView to the Gimp Empty Image Window...I 
  get 
  two layers in one image...Huh? Is this on purpose? Wouldn't it be more 
  rational to open two images, and not combine them into an image with two 
  layers? Maybe I'm missing something, or this was unintended...

 
 Hi!
 
 Dropping on the Emtpy Image Window opens as layers (just as dropping on
 an already open image).
 
 To open them as separate images, drop on the toolbox instead.

I am not so sure if this was good decision to make. I don't quite
remember if Peter suggested that we do it this way. Peter, are you
listening...?


Sven


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Re: [Gimp-developer] make the layer name still

2008-11-03 Thread Joao S. O. Bueno
On Monday 03 November 2008, Martin Nordholts wrote:
 [EMAIL PROTECTED] wrote:
  hi guys and girls :)
 
  As far as we know the name, we still have to scroll the slider to reach
  it. So what is my purpose? Could we add another shortcut to make the
  layer name still? For example right button click. It would make my life
  easier. :)

 Hi!

 Edit - Preferences - Tool Options - Move Tool, Set layer or path as
 active

 Then you can select layers with the Move Tool.


Actually, this is the only sane way of working with GIMP at all.
I can't really understand why the default behavior had changed to the current 
one (not keeping the picked layer). Probably it was a matter of  mimicking 
the main proprietary similar program once again.

And even then, at the time of the change, I remember restoring the classic 
behavior as a tool option, and this was later changed from a  tool option to 
a tool preference, and got hidden deep in the preferences dialog where it 
can't be found by anyone, unless one ask the developers thenselves (like it 
just happened).
I remeber the excuse for hidding it in preferences was nto to polutte the 
tool options with many options. Right now, I have there: 
Move tool: 4 lines worth of options. 
Blend tool: 8 lines in the tool options
Bucket fill: 15 lines in the tool options!!!

(move tool would bump to merely 6 six lines of widgets with the option for 
the keep selected layer  there in plain view of everyone).

Anyone feeling like reconsidering this, unless we get layer groupign and a 
completley new way of getting to layers on gimp 2.8 ?



js
--
 BR,
 Martin
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