From edi at agharta.de  Wed Oct  1 11:28:27 2008
From: edi at agharta.de (Edi Weitz)
Date: Wed, 01 Oct 2008 13:28:27 +0200
Subject: [cl-gd-devel] Re: CL-GD: Documentation error for COLOR-COMPONENT
In-Reply-To: <20080928201322.GA24228@synthetic-forms.thoughtcrime.us> (J. P.
	Larocque's message of "Sun, 28 Sep 2008 13:13:25 -0700")
References: <20080928201322.GA24228@synthetic-forms.thoughtcrime.us>
Message-ID: <ur6704kro.fsf@agharta.de>

On Sun, 28 Sep 2008 13:13:25 -0700, "J\.P\. Larocque" <jpl at thoughtcrime.us> wrote:

> The documentation for CL-GD seems to be wrong for the
> COLOR-COMPONENT function:
>
>     [Function]
>     color-component color component &key image => component
>     
>         Returns the specified color component of color. component can
>         be one of :RED, :GREEN, :BLUE, and :ALPHA.
>
> The color and component parameters should be swapped:
>
>     [Function]
>     color-component component color &key image => component
>
> This seems to reflect the state of CL-GD 0.5.6, and the example for
> COLOR-COMPONENT in the documentation.

Thanks for catching that.  Will be fixed in the next release.

> Thanks for yet another great library,

You're welcome... :)


From lispercat at gmail.com  Wed Oct  1 22:49:30 2008
From: lispercat at gmail.com (Andrei Stebakov)
Date: Wed, 1 Oct 2008 18:49:30 -0400
Subject: [cl-gd-devel] PNG compression
Message-ID: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>

I was experimenting with write-png-to-stream trying :compression-level from
-1 to 9 but it doesn't change the size of the image.
For jpeg quality level works though.
What can I check for PNG compression to work?

Thank you,
Andrew
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From hans at huebner.org  Wed Oct  1 22:53:13 2008
From: hans at huebner.org (=?ISO-8859-1?Q?Hans_H=FCbner?=)
Date: Wed, 1 Oct 2008 18:53:13 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
Message-ID: <fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>

2008/10/1 Andrei Stebakov <lispercat at gmail.com>:
> I was experimenting with write-png-to-stream trying :compression-level from
> -1 to 9 but it doesn't change the size of the image.
> For jpeg quality level works though.
> What can I check for PNG compression to work?

Are you sure that libgd supports compressing PNGs?  If so, it may be a
fixable API problem.  Please verify that libgd itself supports
compression, then let us know.

Thanks,
Hans


From lispercat at gmail.com  Wed Oct  1 23:03:01 2008
From: lispercat at gmail.com (Andrei Stebakov)
Date: Wed, 1 Oct 2008 19:03:01 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
Message-ID: <affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>

On the site http://www.libgd.org/GdHistory they say:
That "the PNG compression level can now be specified when writing PNG
images. See the new gdImagePngEx, gdImagePngEx, gdImagePngCtxEx, and
gdImagePngPtrEx functions.".
This feature starts from version 2.0.12.
I have 2.0.35, so yes, libgd should support it.

Thank you,
Andrew

On Wed, Oct 1, 2008 at 6:53 PM, Hans H?bner <hans at huebner.org> wrote:

> 2008/10/1 Andrei Stebakov <lispercat at gmail.com>:
> > I was experimenting with write-png-to-stream trying :compression-level
> from
> > -1 to 9 but it doesn't change the size of the image.
> > For jpeg quality level works though.
> > What can I check for PNG compression to work?
>
> Are you sure that libgd supports compressing PNGs?  If so, it may be a
> fixable API problem.  Please verify that libgd itself supports
> compression, then let us know.
>
> Thanks,
> Hans
> _______________________________________________
> cl-gd-devel site list
> cl-gd-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/cl-gd-devel
>
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From hans at huebner.org  Wed Oct  1 23:24:36 2008
From: hans at huebner.org (=?ISO-8859-1?Q?Hans_H=FCbner?=)
Date: Wed, 1 Oct 2008 19:24:36 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
	<affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
Message-ID: <fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>

Works for me:

GD-TEST> (with-open-file (f "/tmp/test.png")
           (file-length f))
3005915
GD-TEST> (with-image* (1000 1000 t)
           (write-image-to-file "/tmp/test.png" :compression-level 1
:if-exists :supersede))
#S(CL-GD::IMAGE :IMG #<A Foreign Pointer #x58E000>)
GD-TEST> (with-open-file (f "/tmp/test.png")
           (file-length f))
13178
GD-TEST> (with-image* (1000 1000 t)
           (write-image-to-file "/tmp/test.png" :compression-level 9
:if-exists :supersede))
#S(CL-GD::IMAGE :IMG #<A Foreign Pointer #x58E000>)
GD-TEST> (with-open-file (f "/tmp/test.png")
           (file-length f))
2987

FreeBSD, cl-gd 0.5.6, gd-2.0.35

What are your results for this test?

-Hans

2008/10/1 Andrei Stebakov <lispercat at gmail.com>:
> On the site http://www.libgd.org/GdHistory they say:
> That "the PNG compression level can now be specified when writing PNG
> images. See the new gdImagePngEx, gdImagePngEx, gdImagePngCtxEx, and
> gdImagePngPtrEx functions.".
> This feature starts from version 2.0.12.
> I have 2.0.35, so yes, libgd should support it.
>
> Thank you,
> Andrew
>
> On Wed, Oct 1, 2008 at 6:53 PM, Hans H?bner <hans at huebner.org> wrote:
>>
>> 2008/10/1 Andrei Stebakov <lispercat at gmail.com>:
>> > I was experimenting with write-png-to-stream trying :compression-level
>> > from
>> > -1 to 9 but it doesn't change the size of the image.
>> > For jpeg quality level works though.
>> > What can I check for PNG compression to work?
>>
>> Are you sure that libgd supports compressing PNGs?  If so, it may be a
>> fixable API problem.  Please verify that libgd itself supports
>> compression, then let us know.
>>
>> Thanks,
>> Hans
>> _______________________________________________
>> cl-gd-devel site list
>> cl-gd-devel at common-lisp.net
>> http://common-lisp.net/mailman/listinfo/cl-gd-devel
>
>
> _______________________________________________
> cl-gd-devel site list
> cl-gd-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/cl-gd-devel
>


From hans at huebner.org  Wed Oct  1 23:25:38 2008
From: hans at huebner.org (=?ISO-8859-1?Q?Hans_H=FCbner?=)
Date: Wed, 1 Oct 2008 19:25:38 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
	<affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
	<fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>
Message-ID: <fd2982320810011625v7874b5fhd3111e39065fb6af@mail.gmail.com>

On Wed, Oct 1, 2008 at 19:24, Hans H?bner <hans at huebner.org> wrote:
> Works for me:

Obviously, I made a copy and paste error.  This:

> GD-TEST> (with-open-file (f "/tmp/test.png")
>           (file-length f))
> 3005915

is for :compression-level 0, obviously.

-Hans


From lispercat at gmail.com  Thu Oct  2 15:22:29 2008
From: lispercat at gmail.com (Andrei Stebakov)
Date: Thu, 2 Oct 2008 11:22:29 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <fd2982320810011625v7874b5fhd3111e39065fb6af@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
	<affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
	<fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>
	<fd2982320810011625v7874b5fhd3111e39065fb6af@mail.gmail.com>
Message-ID: <affe56e00810020822j536a7303t83ee11cd42339336@mail.gmail.com>

Yes, it works.
The scenario that I have is like this:
I am trying to down-size a png image so I

   1. open it with with-image-from-file
   2. copy resized image (copy-image old-image new-image ....)
   3. save it  (write-image-to-file new-image-file-name :image new-image
   :compression-level 5)

In my case :compression-level doesn't change the size of the output image.
Probably it happens because the original file that I am trying to re-size is
already compressed to the maximum.

Thank you,
Andrew

On Wed, Oct 1, 2008 at 7:25 PM, Hans H?bner <hans at huebner.org> wrote:

> On Wed, Oct 1, 2008 at 19:24, Hans H?bner <hans at huebner.org> wrote:
> > Works for me:
>
> Obviously, I made a copy and paste error.  This:
>
> > GD-TEST> (with-open-file (f "/tmp/test.png")
> >           (file-length f))
> > 3005915
>
> is for :compression-level 0, obviously.
>
> -Hans
> _______________________________________________
> cl-gd-devel site list
> cl-gd-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/cl-gd-devel
>
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From hans at huebner.org  Thu Oct  2 15:28:16 2008
From: hans at huebner.org (=?ISO-8859-1?Q?Hans_H=FCbner?=)
Date: Thu, 2 Oct 2008 11:28:16 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <affe56e00810020822j536a7303t83ee11cd42339336@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
	<affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
	<fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>
	<fd2982320810011625v7874b5fhd3111e39065fb6af@mail.gmail.com>
	<affe56e00810020822j536a7303t83ee11cd42339336@mail.gmail.com>
Message-ID: <fd2982320810020828w1071da0cp9625197b500c7969@mail.gmail.com>

2008/10/2 Andrei Stebakov <lispercat at gmail.com>:
> Yes, it works.
> The scenario that I have is like this:
> I am trying to down-size a png image so I
>
> open it with with-image-from-file
> copy resized image (copy-image old-image new-image ....)
> save it  (write-image-to-file new-image-file-name :image new-image
> :compression-level 5)
>
> In my case :compression-level doesn't change the size of the output image.
> Probably it happens because the original file that I am trying to re-size is
> already compressed to the maximum.

I fear I don't know enough about PNG compression to say anything
profound here.  I do suspect that it is a general GD issue rather than
a cl-gd problem, so maybe asking on some GD support channel would be
helpful?  You'd propably need to supply the image in question to have
someone comment on what compression you can expect.

-Hans


From lispercat at gmail.com  Thu Oct  2 15:44:06 2008
From: lispercat at gmail.com (Andrei Stebakov)
Date: Thu, 2 Oct 2008 11:44:06 -0400
Subject: [cl-gd-devel] PNG compression
In-Reply-To: <fd2982320810020828w1071da0cp9625197b500c7969@mail.gmail.com>
References: <affe56e00810011549v2d63ff0ej46b7b00719666588@mail.gmail.com>
	<fd2982320810011553t30a0e0f4t60e497a7158b3ec2@mail.gmail.com>
	<affe56e00810011603r1ee732d6k9dbef100d7abc9f@mail.gmail.com>
	<fd2982320810011624x5c905e51ged8ff0ee69e9114a@mail.gmail.com>
	<fd2982320810011625v7874b5fhd3111e39065fb6af@mail.gmail.com>
	<affe56e00810020822j536a7303t83ee11cd42339336@mail.gmail.com>
	<fd2982320810020828w1071da0cp9625197b500c7969@mail.gmail.com>
Message-ID: <affe56e00810020844r2be866c0mbb6aa0c68f91d39@mail.gmail.com>

Thank you, Hans. Looks like I need to contact libgd folks to learn more
about this type of operation.

Andrew

On Thu, Oct 2, 2008 at 11:28 AM, Hans H?bner <hans at huebner.org> wrote:

> 2008/10/2 Andrei Stebakov <lispercat at gmail.com>:
> > Yes, it works.
> > The scenario that I have is like this:
> > I am trying to down-size a png image so I
> >
> > open it with with-image-from-file
> > copy resized image (copy-image old-image new-image ....)
> > save it  (write-image-to-file new-image-file-name :image new-image
> > :compression-level 5)
> >
> > In my case :compression-level doesn't change the size of the output
> image.
> > Probably it happens because the original file that I am trying to re-size
> is
> > already compressed to the maximum.
>
> I fear I don't know enough about PNG compression to say anything
> profound here.  I do suspect that it is a general GD issue rather than
> a cl-gd problem, so maybe asking on some GD support channel would be
> helpful?  You'd propably need to supply the image in question to have
> someone comment on what compression you can expect.
>
> -Hans
> _______________________________________________
> cl-gd-devel site list
> cl-gd-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/cl-gd-devel
>
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From jeffrey at cunningham.net  Fri Oct 17 03:57:48 2008
From: jeffrey at cunningham.net (Jeff Cunningham)
Date: Thu, 16 Oct 2008 20:57:48 -0700
Subject: [cl-gd-devel] problem compiling cl-gd-glue.c on 64-bit sytem
Message-ID: <48F80D3C.5000201@cunningham.net>

Has anyone had a problem compiling the cl-gd-glue.c into the shared 
library on a 64-bit system? It's never given me any problem on 32-bit 
systems, and I could swear I've done it on a 64-bit AMD Debian system 
before, but I just tried it on a new one and got this error:

make
gcc -I/usr/local/include -fPIC -c cl-gd-glue.c
ld -shared -lgd -lz -lpng -ljpeg -lfreetype -liconv -lm -lc cl-gd-glue.o 
-o cl-gd-glue.so -L/usr/local/lib
ld: /usr/local/lib/libz.a(compress.o): relocation R_X86_64_32 against `a 
local symbol' can not be used when making a shared object; recompile 
with -fPIC
/usr/local/lib/libz.a: could not read symbols: Bad value
make: *** [cl-gd-glue.so] Error 1

I'm trying to install cl-gd-0.5.6 straight from Edi's site. gd-2.0.35 is 
installed, along with the other dependencies. This is puzzling.

Jeff



From jeffrey at cunningham.net  Fri Oct 17 15:55:00 2008
From: jeffrey at cunningham.net (Jeff Cunningham)
Date: Fri, 17 Oct 2008 08:55:00 -0700
Subject: [cl-gd-devel] problem compiling cl-gd-glue.c on 64-bit sytem
In-Reply-To: <48F80D3C.5000201@cunningham.net>
References: <48F80D3C.5000201@cunningham.net>
Message-ID: <48F8B554.9030200@cunningham.net>

Jeff Cunningham wrote:
> Has anyone had a problem compiling the cl-gd-glue.c into the shared 
> library on a 64-bit system? It's never given me any problem on 32-bit 
> systems, and I could swear I've done it on a 64-bit AMD Debian system 
> before, but I just tried it on a new one and got this error:
>
> make
> gcc -I/usr/local/include -fPIC -c cl-gd-glue.c
> ld -shared -lgd -lz -lpng -ljpeg -lfreetype -liconv -lm -lc cl-gd-glue.o 
> -o cl-gd-glue.so -L/usr/local/lib
> ld: /usr/local/lib/libz.a(compress.o): relocation R_X86_64_32 against `a 
> local symbol' can not be used when making a shared object; recompile 
> with -fPIC
> /usr/local/lib/libz.a: could not read symbols: Bad value
> make: *** [cl-gd-glue.so] Error 1
>
> I'm trying to install cl-gd-0.5.6 straight from Edi's site. gd-2.0.35 is 
> installed, along with the other dependencies. This is puzzling.
>
> Jeff
>
>   
Well, I have a solution, but its a hack (for the benefit of anyone else 
faced with a similar problem).
Clearly, the linker is prefering to use the static library libz.a 
instead of the dynamic one libz.so. Why, I don't know. It works when I 
modify the Makefile to this:

cl-gd-glue.so:
    gcc -I/usr/local/include -fPIC -c cl-gd-glue.c
    ld -shared -lgd /usr/lib/libz.so -lpng -ljpeg -lfreetype -liconv -lm 
-lc cl-gd-glue.o -o cl-gd-glue.so -L/usr/local/lib
    rm cl-gd-glue.o

Jeff