Re: [9fans] page(1)

Re: [9fans] page(1)

[Akshat Kumar]

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No, they don't work in png(1) either:

term% hget http://9grid.es/screens/screen1.png|png
png: loadimage <stdin> of 2430000 bytes failed: loadimage: insufficient data

term% png n/dump/usr/akumar/plan9/screens/nihongonokawa.png
png: loadimage n/dump/usr/akumar/plan9/screens/nihongonokawa.png of 1310720 bytes failed: loadimage: insufficient data

(the latter is a snapshot of /dev/screen taken with topng(1))
ak

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From: Russ Cox <rsc@swtch.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] page(1)
Date: Fri, 20 Feb 2009 17:32:52 -0800
Message-ID: <dd6fe68a0902201732i12e4e4d3xf83c5966612dd4a4@mail.gmail.com>

On Fri, Feb 20, 2009 at 5:03 PM, Akshat Kumar
<akumar@mail.nanosouffle.net> wrote:
> Lately, page has been having troubles displaying an increasing number
> of PNG image files.  I'm not sure whether this is due to any recent
> changes or what...  Even a PNG of /dev/screen taken with topng(1)
> renders just the dreaded question-marks.

If they fail in page, do they work in png?
Do you happen to have another program
named "png" in your path before /bin/png?

Russ

Re: [9fans] page(1)

[Akshat Kumar]

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If you get to debugging it, that'd be great.  For everyone else, the
still useful png is in /n/sourcesdump/2009/0201/plan9/386/bin/png.
Everything works fine now, thanks FGB.


ak

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From: "Federico G. Benavento" <benavento@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] page(1)
Date: Sat, 21 Feb 2009 00:38:27 -0300
Message-ID: <32d987d50902201938l5969aa5w3d97fb323a42f8f3@mail.gmail.com>

hola,

I haven't had the time to debug it, but readpng() changed
in the last days and it doesn't work correctly anymore.
I jdid yesterday -c /386/bin/png and everything went
back to normal.

On Fri, Feb 20, 2009 at 10:49 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> On Fri Feb 20 20:29:55 EST 2009, akumar@mail.nanosouffle.net wrote:
>
>> Neither works for me.
>>
>> term% hget http://9grid.es/screens/screen1.png|page
>> reading through graphics...
>> warning: couldn't read image: readimage: read count 32400 not 64800: screen id in use
>>
>
> you should also try running png directly from sources.
> assuming that this does not work, ...
>
> it seems that here:
> /sys/src/libdraw/readimage.c:103
>
>                m = readn(fd, tmp, n);
>                if(m != n){
>>>>                     werrstr("readimage: read count %d not %d: %r", m, n);
>   Err:
>                        if(dolock)
>                                lockdisplay(d);
>
> things are getting confused.  i think it would
> be easier to debug if you added
>
>        werrstr("");
>
> right before the readn() and recompiled png.
> i can't quite see how that error message could
> result from reading an image.
>
> - erik
>
>



--
Federico G. Benavento

Re: [9fans] page(1)

[erik quanstrom]

On Mon Feb 23 15:16:16 EST 2009, akumar@mail.nanosouffle.net wrote:

> If you get to debugging it, that'd be great.  For everyone else, the
> still useful png is in /n/sourcesdump/2009/0201/plan9/386/bin/png.
> Everything works fine now, thanks FGB.

i did see that the changes to png.c didn't make any difference.
the changes to readpng do.  there's a lot of changes to readpng,
so i didn't chase that thread.

- erik

Re: [9fans] page(1)

[geoff]

Sorry about that.  I've reverted to the older readpng.c.
The new one shouldn't have escaped yet.

The new one was an attempt to fix bugs in the old one
(there are some png files that the old one can't handle
correctly), but the new one has its own bugs.

Re: [9fans] page(1)

[erik quanstrom]

On Fri Feb 20 20:29:55 EST 2009, akumar@mail.nanosouffle.net wrote:

> Neither works for me.
>
> term% hget http://9grid.es/screens/screen1.png|page
> reading through graphics...
> warning: couldn't read image: readimage: read count 32400 not 64800: screen id in use
>

you should also try running png directly from sources.
assuming that this does not work, ...

it seems that here:
/sys/src/libdraw/readimage.c:103

		m = readn(fd, tmp, n);
		if(m != n){
>>>			werrstr("readimage: read count %d not %d: %r", m, n);
   Err:
			if(dolock)
				lockdisplay(d);

things are getting confused.  i think it would
be easier to debug if you added

	werrstr("");

right before the readn() and recompiled png.
i can't quite see how that error message could
result from reading an image.

- erik

Re: [9fans] page(1)

[Federico G. Benavento]

hola,

I haven't had the time to debug it, but readpng() changed
in the last days and it doesn't work correctly anymore.
I jdid yesterday -c /386/bin/png and everything went
back to normal.

On Fri, Feb 20, 2009 at 10:49 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> On Fri Feb 20 20:29:55 EST 2009, akumar@mail.nanosouffle.net wrote:
>
>> Neither works for me.
>>
>> term% hget http://9grid.es/screens/screen1.png|page
>> reading through graphics...
>> warning: couldn't read image: readimage: read count 32400 not 64800: screen id in use
>>
>
> you should also try running png directly from sources.
> assuming that this does not work, ...
>
> it seems that here:
> /sys/src/libdraw/readimage.c:103
>
>                m = readn(fd, tmp, n);
>                if(m != n){
>>>>                     werrstr("readimage: read count %d not %d: %r", m, n);
>   Err:
>                        if(dolock)
>                                lockdisplay(d);
>
> things are getting confused.  i think it would
> be easier to debug if you added
>
>        werrstr("");
>
> right before the readn() and recompiled png.
> i can't quite see how that error message could
> result from reading an image.
>
> - erik
>
>



--
Federico G. Benavento

Re: [9fans] page(1)

[Akshat Kumar]

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Neither works for me.

term% hget http://9grid.es/screens/screen1.png|page
reading through graphics...
warning: couldn't read image: readimage: read count 32400 not 64800: screen id in use

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From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] page(1)
Date: Fri, 20 Feb 2009 20:09:13 -0500
Message-ID: <e99dc1e9a20b12797e445ebe04f140b7@quanstro.net>

On Fri Feb 20 20:05:49 EST 2009, akumar@mail.nanosouffle.net wrote:
> Lately, page has been having troubles displaying an increasing number
> of PNG image files.  I'm not sure whether this is due to any recent
> changes or what...  Even a PNG of /dev/screen taken with topng(1)
> renders just the dreaded question-marks.
>
> Any ideas what's going on here (as a simple test, you can first try
> the screenshot on 9grid.es, which is a PNG, and also isn't rendered
> by page(1) for me, then you can try taking your own snapshot with
> topng(1))?

both of these work for me:

; hget http://9grid.es/screens/screen1.png|page
; hget http://9grid.es/screens/screen1.png|/n/sources/plan9/386/bin/page

- erik

[9fans] page(1)

[Akshat Kumar]

Lately, page has been having troubles displaying an increasing number
of PNG image files.  I'm not sure whether this is due to any recent
changes or what...  Even a PNG of /dev/screen taken with topng(1)
renders just the dreaded question-marks.

Any ideas what's going on here (as a simple test, you can first try
the screenshot on 9grid.es, which is a PNG, and also isn't rendered
by page(1) for me, then you can try taking your own snapshot with
topng(1))?


ak

Re: [9fans] page(1)

[erik quanstrom]

On Fri Feb 20 20:05:49 EST 2009, akumar@mail.nanosouffle.net wrote:
> Lately, page has been having troubles displaying an increasing number
> of PNG image files.  I'm not sure whether this is due to any recent
> changes or what...  Even a PNG of /dev/screen taken with topng(1)
> renders just the dreaded question-marks.
>
> Any ideas what's going on here (as a simple test, you can first try
> the screenshot on 9grid.es, which is a PNG, and also isn't rendered
> by page(1) for me, then you can try taking your own snapshot with
> topng(1))?

both of these work for me:

; hget http://9grid.es/screens/screen1.png|page
; hget http://9grid.es/screens/screen1.png|/n/sources/plan9/386/bin/page

- erik

Re: [9fans] page(1)

[Russ Cox]

On Fri, Feb 20, 2009 at 5:03 PM, Akshat Kumar
<akumar@mail.nanosouffle.net> wrote:
> Lately, page has been having troubles displaying an increasing number
> of PNG image files.  I'm not sure whether this is due to any recent
> changes or what...  Even a PNG of /dev/screen taken with topng(1)
> renders just the dreaded question-marks.

If they fail in page, do they work in png?
Do you happen to have another program
named "png" in your path before /bin/png?

Russ