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Re: gtk-list Digest, Vol 28, Issue 18

I have a question as well.

here is a quote from Michael Torrie:

First is that when you uncover a window, X11 sends expose events to the
uncovered window. It is up to the client (the app) to respond to these
events and redraw the parts that were exposed.  If the window is in
motion, these expose events may come faster than the app can deal with.
GTK typically "compresses" these events and will wait to do the actual
redraw.  This reduces the CPU consumption and increases overall speed,
but it comes at the expense of visual stuttering.  "

IF that is the case then why do i get Stuttering AND 100% cpu
utilization? When I hold a window and move it around in little tiny
circles, my cpu monitor goes up to 100% (on an amd 64 3000 )  . btw
thats with no other programs running.........

On 8/10/06, gtk-list-request gnome org <gtk-list-request gnome org> wrote:

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Today's Topics:

   1. GTK is double buffered by default ? on GNU/Linux and MS
      Windows ? ( KLEIN St?phane )
   2. Re: GTK is double buffered by default ? on GNU/Linux and MS
      Windows ? (Sergei Steshenko)
   3. tool (Bill Cunningham)
   4. Re: tool (Sergei Steshenko)
   5. Re: gtk_label_set_text () BUG !?!?!?!??!?!?!??!!? ( N00b )
      (Tristan Van Berkom)
   6. Re: gtk drawing question (Do?acan G?ney)


----------------------------------------------------------------------

Message: 1
Date: Thu, 10 Aug 2006 16:34:13 +0200
From: " KLEIN St?phane " <klein stephane gmail com>
Subject: GTK is double buffered by default ? on GNU/Linux and MS
        Windows ?
To: gtk-list gnome org
Message-ID:
        <6bcc32f20608100734j618826ffofbbafc2141d74268 mail gmail com>
Content-Type: text/plain; charset="iso-8859-1"

Hello,

I use Ubuntu system. I've showed gnome and Gimp to one friend. This friend
use MS Windows since always.

He say : "I dislike Linux, Ubuntu, Gnome, Gimp ... because the GUI display
scintillate. This also for Gimp MS Windows version".

He say : "First, I see the window draw, next the background draw of
button...". On the contrary, MS Windows application display all widget in
one step."

I don't know if you understand my subject.

My question : is there double buffering render in GTK ? If yes, why my
friend think than Windows display is faster than GTK and other widget
toolkit ? If not, why that ?

Thanks for your response.
--St?phane
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Message: 2
Date: Thu, 10 Aug 2006 07:49:04 -0700 (PDT)
From: Sergei Steshenko <sergstesh yahoo com>
Subject: Re: GTK is double buffered by default ? on GNU/Linux and MS
        Windows ?
To: KLEIN "Stéphane" <klein stephane gmail com>, gtk-list gnome org
Message-ID: <20060810144904 50907 qmail web35209 mail mud yahoo com>
Content-Type: text/plain; charset=iso-8859-1



--- KLEIN St?phane <klein stephane gmail com> wrote:

> Hello,
>
> I use Ubuntu system. I've showed gnome and Gimp to one friend. This friend
> use MS Windows since always.
>
> He say : "I dislike Linux, Ubuntu, Gnome, Gimp ... because the GUI display
> scintillate. This also for Gimp MS Windows version".
>
> He say : "First, I see the window draw, next the background draw of
> button...". On the contrary, MS Windows application display all widget in
> one step."
>
> I don't know if you understand my subject.
>
> My question : is there double buffering render in GTK ? If yes, why my
> friend think than Windows display is faster than GTK and other widget
> toolkit ? If not, why that ?
>
> Thanks for your response.
> --St?phane
> > _______________________________________________
> gtk-list mailing list
> gtk-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-list
>

For startes, Windows graphics system is not network-aware,
unlike X.

This makes it necessary to use VNC, RDP and friends to
access remote desktop on Windows, but makes graphics system
faster when local access is in place.

With X you have built-in network accessibility, but,
as far as I know, it's one of the factors making it
slower.

OpenGL should provide fast X graphics.

--Sergei.

Applications From Scratch: http://appsfromscratch.berlios.de/

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------------------------------

Message: 3
Date: Thu, 10 Aug 2006 10:55:22 -0400
From: "Bill Cunningham" <billcu1 verizon net>
Subject: tool
To: <gtk-list gnome org>
Message-ID: <000701c6bc8d$02030200$2f01a8c0 myhome westell com>
Content-Type: text/plain; charset=iso-8859-1

    Sergei,

Does your tool have a home page? I'm about at witts end with this. Now I'm
being told I need expat to compile fontconfig which is needed for freetype.
You sent me a link and I downloaded the file. Is there a page? I don't have
that link anymore.

Thanks
Bill




------------------------------

Message: 4
Date: Thu, 10 Aug 2006 08:03:41 -0700 (PDT)
From: Sergei Steshenko <sergstesh yahoo com>
Subject: Re: tool
To: Bill Cunningham <billcu1 verizon net>, gtk-list gnome org
Message-ID: <20060810150341 75350 qmail web35204 mail mud yahoo com>
Content-Type: text/plain; charset=iso-8859-1



--- Bill Cunningham <billcu1 verizon net> wrote:

>     Sergei,
>
> Does your tool have a home page? I'm about at witts end with this. Now I'm
> being told I need expat to compile fontconfig which is needed for freetype.
> You sent me a link and I downloaded the file. Is there a page? I don't have
> that link anymore.
>
> Thanks
> Bill
>
>
> _______________________________________________
> gtk-list mailing list
> gtk-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-list
>

http://appsfromscratch.berlios.de/

Isn't the URL in my signature ?

I'll be out for several hours - if you encounter a problem, read
the first error message (look for :ERROR:). The message should
contain full path to 'configure.log', 'make.log', etc.

Look into the logs to see what the problem is.

Typically, you'll need some basic packages like 'zlib', 'libpng'
etc., including .h files, installed at system level.


--Sergei.

Applications From Scratch: http://appsfromscratch.berlios.de/

__________________________________________________
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Tired of spam?  Yahoo! Mail has the best spam protection around
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------------------------------

Message: 5
Date: Thu, 10 Aug 2006 12:00:32 -0400
From: Tristan Van Berkom <tristan van berkom gmail com>
Subject: Re: gtk_label_set_text () BUG !?!?!?!??!?!?!??!!? ( N00b )
To: hm <z_b_r poczta fm>
Cc: gtk-list gnome org
Message-ID: <44DB5820 4090606 gnome org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

hm wrote:

>Hi !
>
>  I`m not quiet sure if my previous mail was sent, so I`ll try to write it once again.
>Lieven van der Heide wrote, that I should call all gtk functions from one thread. I`ve tried :
>
>1. Created function in main program, that calls gtk_label_set_text (). The function takes string as a ( from <string> ) parameter, which is converted to c-language string by string. c_str ()
>
>2. Thread function gets pointer to function from point 1. as a parameter, and when specific conditions arefulfilled, then the function from point 1. is beiung called ( by the pointer passed as an argument for thread function )
>
>Result : the same :/
>
>
Because your not doing anything different.

>Any clues ? :)
>
>
Yes,
    please save yourself (and all of us) alot of effort by finding out
the meaning
of threads, if you dont have a good understanding about threads, your
program
will crash and lock up I garauntee it, you will also find yourself
unable to properly
phrase questions about why its not working - because you havent figured out
the meaning of your questions yet.

Cheers,
                                  -Tristan

I'm not about to write a book here but here's a little hint to justify
my rant:

    - Threads share data throughout the process address space, all data
belongs
      to the 'program' or 'process', if you are currently executing
thread B, then
      function calls from thread B will be run in thread B; regardless
of in which
      object file the stub happened to be built in and linked from.

   - When you use an idle handler (g_idle_add()) to schedule an event in
the mainloop,
     this will result in a write to a pipe() that is used to wakeup the
GMainContext of
     the mainloop (usually in the main thread), again - regardless of
what object file
     the idle handler was declared in - it will be run from the main
thread of execution.




------------------------------

Message: 6
Date: Thu, 10 Aug 2006 15:58:47 +0000
From: Do?acan G?ney <naliven msn com>
Subject: Re: gtk drawing question
To: gtk-list gnome org
Message-ID: <BAY5-F1409D5CDA7C24380F53650B24A0 phx gbl>
Content-Type: text/plain; charset=iso-8859-9; format=flowed



>From: Paul Davis <paul linuxaudiosystems com>
>Reply-To: paul linuxaudiosystems com
>To: Do?acan G?ney <naliven msn com>
>CC: gtk-list gnome org
>Subject: Re: gtk drawing question
>Date: Thu, 10 Aug 2006 10:14:24 -0400
>
>On Thu, 2006-08-10 at 13:46 +0000, Do?acan G?ney wrote:
> > Hi,
> >
> > I am trying to write a program similar to the one at
> > http://mirko.lilik.it/Ruby-GNOME2/moz-snapshooter.rb . As far as I
> > understand it, net-stop only means that the loading of page is
>completed, it
> > doesn't necessarily mean that drawing the widget is complete. My
>question
> > is, is there a way to understand if drawing of a widget (gtkmozembed in
>this
> > case) is complete?
>
>your question is ill-formed. do you mean "when every pixel that
>represents a widget has been displayed on a screen?" or "when the code
>responsible for requesting pixel changes has been called?" or something
>else?

What I want to do is to load a web page, then take the snapshot of this
page.
So I tell gtkmozembed to load the url and notify me (through net-stop) when
it is done.
When I recieve the net-stop signal, I create a pixbuf from the gtkmozembed
widget and save it to a jpg. My problem is that, recieving net-stop signal
only means that the page is fetched from web but not completely displayed on
the screen(I think). So the jpg I generated is sometimes empty, or
half-drawn.

So, I guess my question is:
I want to be notified when the page is completely rendered (with all the
pictures and text and other stuff in it) and displayed on the screen.

Is that clear enough?

>
>

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