Re: images in Perl/Tk
On 2024-03-19 13:29, debian-u...@howorth.org.uk wrote:
There's a bug in your program above, when used for PNG or JPEG. It's a
perl error and I expect you would have got an answer on perlmonks as I
suggested.
The error is described on
https://docstore.mik.ua/orelly/perl3/tk/ch17_01.htm
Look for "Notice the Photo image formats JPEG, PNG, and TIFF—not part
of the Perl/Tk distribution—must be specifically imported."
Only the .bmp file displays other files have error.
"Uncaught exception from user code:
couldn't recognize data in image file "images/red.png" at
/usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21.
Tk::Image::new("Tk::Photo", MainWindow=HASH(0x560632dc9098),
"-file", "images/red.png") called at
/usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 63
Tk::Image::__ANON__(MainWindow=HASH(0x560632dc9098), "-file",
"images/red.png") called at ./test-image.pl line 8"
I've installed
Tk, libgraphics-magick-perl, libimage-imlib2-perl, tkagif, tkblt,
tklib, libtk-img, tkpng.
Now that I know .bmp works I can use that.
Wonder tho' why others don't display, Bookworm and Trixie.
If there is some other module to include I can't discover what it's
name is as yet.
Tk::Photo is a module but seems to be included in Perl/Tk
I'm not really understanding if the Perl/Tk is a rewrite or an
interface to Tk modules.
You might want to read the book! :) Or even the CPAN entry for Tk if
you want to understand more.
Chapter 17 starts by saying Perl/Tk supports the bitmap, Pixmap, and
Photo image types.
xbm, xpm, bmp, png, xbm, ppm, jpg, xpm, gif, tif =o)
Adding Tk::PNG, Tk::JPEG indeed allows those filetypes to be used.
PS: My emails to list take forever, if at all, to arrive here. I saw
Gareth's mail on the debian website but that hasn't arrived here.
That may be a feature of gmail so I guess I should subscribe from
another email address to check.
mick
Re: images in Perl/Tk
"mick.crane" wrote:
> On 2024-03-19 00:42, Michael Lange wrote:
> > Hi,
> >
> > On Mon, 18 Mar 2024 19:23:39 +
> > "mick.crane" wrote:
> >
> >> I try to load images with Perl/Tk but there is message,
> >> "couldn't recognize data in image file "test.jpeg" at
> >> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21"
> >> I've tried different images/pngs/jpgs with same error.
> >> images load OK in other viewers.
> >> Installed tkpng with apt.
> >>
> >> Anybody successfully used images with Perl/Tk?
> >> Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and
> >> may possibly help recognise the file format?
> >> Or is there some 'pruning' of the images, made with Gimp, needed to
> >> work with Tk?
> >>
> >> mick
> >>
> >
> > I never used Tk with Perl, but first, you do not need tkpng for png
> > images anymore, pngs have been supported natively by Tk for years.
> > Maybe
> > tkpng is broken (as at least some versions of img::png that came
> > with debian have been)?
> > Second, Tk does not support jpegs without third-party
> > extensions; probably img::jpeg can help, so you could try to
> > install libtk-img with apt and then do the Perl equivalent of
> >
> >package require img::jpeg
>
> Made an image, saved as .bmp, gif, ppm, pnm, tif, png, jpg
> #!/usr/bin/perl
> use warnings;
> use strict;
> use Image::Imlib2;
> my $image=Image::Imlib2->new(400,400);
> $image->has_alpha(1);
> $image->set_color(255,0,0,255);
> $image->fill_rectangle(0,0,400,400);
> $image->save('./images/red.png');
>
> try to display image in Perl/Tk
> #!/usr/bin/perl
> use strict;
> use warnings;
> use Tk;
> my $mw = MainWindow->new;
> $mw->title("Test");
> my $image = $mw->Photo(-file => "images/red.bmp");
> my $image_label = $mw->Label(-image => $image)->pack;
> MainLoop;
There's a bug in your program above, when used for PNG or JPEG. It's a
perl error and I expect you would have got an answer on perlmonks as I
suggested.
The error is described on
https://docstore.mik.ua/orelly/perl3/tk/ch17_01.htm
Look for "Notice the Photo image formats JPEG, PNG, and TIFF—not part
of the Perl/Tk distribution—must be specifically imported."
> Only the .bmp file displays other files have error.
>
> "Uncaught exception from user code:
> couldn't recognize data in image file "images/red.png" at
> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21.
> Tk::Image::new("Tk::Photo", MainWindow=HASH(0x560632dc9098),
> "-file", "images/red.png") called at
> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 63
> Tk::Image::__ANON__(MainWindow=HASH(0x560632dc9098), "-file",
> "images/red.png") called at ./test-image.pl line 8"
>
> I've installed
> Tk, libgraphics-magick-perl, libimage-imlib2-perl, tkagif, tkblt,
> tklib, libtk-img, tkpng.
>
> Now that I know .bmp works I can use that.
> Wonder tho' why others don't display, Bookworm and Trixie.
> If there is some other module to include I can't discover what it's
> name is as yet.
> Tk::Photo is a module but seems to be included in Perl/Tk
> I'm not really understanding if the Perl/Tk is a rewrite or an
> interface to Tk modules.
You might want to read the book! :) Or even the CPAN entry for Tk if
you want to understand more.
Re: images in Perl/Tk
On Tue 19/03/2024 at 12:00, mick.crane wrote:
> On 2024-03-19 00:42, Michael Lange wrote:
>> Hi,
>>
>> On Mon, 18 Mar 2024 19:23:39 +
>> "mick.crane" wrote:
>>
>>> I try to load images with Perl/Tk but there is message,
>>> "couldn't recognize data in image file "test.jpeg" at
>>> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21"
>>> I've tried different images/pngs/jpgs with same error.
>>> images load OK in other viewers.
>>> Installed tkpng with apt.
>>>
>>> Anybody successfully used images with Perl/Tk?
>>> Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and may
>>> possibly help recognise the file format?
>>> Or is there some 'pruning' of the images, made with Gimp, needed to
>>> work with Tk?
>>>
>>> mick
>>>
>>
>> I never used Tk with Perl, but first, you do not need tkpng for png
>> images anymore, pngs have been supported natively by Tk for years.
>> Maybe
>> tkpng is broken (as at least some versions of img::png that came with
>> debian have been)?
>> Second, Tk does not support jpegs without third-party
>> extensions; probably img::jpeg can help, so you could try to
>> install libtk-img with apt and then do the Perl equivalent of
>>
>>package require img::jpeg
>
> Made an image, saved as .bmp, gif, ppm, pnm, tif, png, jpg
> #!/usr/bin/perl
> use warnings;
> use strict;
> use Image::Imlib2;
> my $image=Image::Imlib2->new(400,400);
> $image->has_alpha(1);
> $image->set_color(255,0,0,255);
> $image->fill_rectangle(0,0,400,400);
> $image->save('./images/red.png');
>
> try to display image in Perl/Tk
> #!/usr/bin/perl
> use strict;
> use warnings;
> use Tk;
> my $mw = MainWindow->new;
> $mw->title("Test");
> my $image = $mw->Photo(-file => "images/red.bmp");
> my $image_label = $mw->Label(-image => $image)->pack;
> MainLoop;
>
> Only the .bmp file displays other files have error.
>
> "Uncaught exception from user code:
> couldn't recognize data in image file "images/red.png" at
> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21.
> Tk::Image::new("Tk::Photo", MainWindow=HASH(0x560632dc9098), "-file",
> "images/red.png") called at
> /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 63
> Tk::Image::__ANON__(MainWindow=HASH(0x560632dc9098), "-file",
> "images/red.png") called at ./test-image.pl line 8"
>
> I've installed
> Tk, libgraphics-magick-perl, libimage-imlib2-perl, tkagif, tkblt, tklib,
> libtk-img, tkpng.
>
> Now that I know .bmp works I can use that.
> Wonder tho' why others don't display, Bookworm and Trixie.
> If there is some other module to include I can't discover what it's name
> is as yet.
> Tk::Photo is a module but seems to be included in Perl/Tk
> I'm not really understanding if the Perl/Tk is a rewrite or an interface
> to Tk modules.
> mick
Hi Mick,
With the qualification that it's been years since I've done anything much with
Perl...
$ apt search perl-tk
perl-tk/stable,now 1:804.036-1+b2 amd64 [installed,automatic]
Perl module providing the Tk graphics library
$ apt search tkpng
tkpng/stable 0.9-3+b1 amd64
PNG photo image support to Tcl/Tk<--- isn't this "not for perl"?
I couldn't find any reference to "tkpng" in
https://metacpan.org/dist/Tk
but there is:
Tk::PNG - PNG loader for Tk::Photo
(in the table there is no hyphen but wider gap)
Someone had a similar problem with Strawberry Perl on Windows. Does this help?
https://www.perlmonks.org/?node_id=1233724
HTH
Gareth
Re: images in Perl/Tk
On 2024-03-19 00:42, Michael Lange wrote:
Hi,
On Mon, 18 Mar 2024 19:23:39 +
"mick.crane" wrote:
I try to load images with Perl/Tk but there is message,
"couldn't recognize data in image file "test.jpeg" at
/usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21"
I've tried different images/pngs/jpgs with same error.
images load OK in other viewers.
Installed tkpng with apt.
Anybody successfully used images with Perl/Tk?
Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and may
possibly help recognise the file format?
Or is there some 'pruning' of the images, made with Gimp, needed to
work with Tk?
mick
I never used Tk with Perl, but first, you do not need tkpng for png
images anymore, pngs have been supported natively by Tk for years.
Maybe
tkpng is broken (as at least some versions of img::png that came with
debian have been)?
Second, Tk does not support jpegs without third-party
extensions; probably img::jpeg can help, so you could try to
install libtk-img with apt and then do the Perl equivalent of
package require img::jpeg
Made an image, saved as .bmp, gif, ppm, pnm, tif, png, jpg
#!/usr/bin/perl
use warnings;
use strict;
use Image::Imlib2;
my $image=Image::Imlib2->new(400,400);
$image->has_alpha(1);
$image->set_color(255,0,0,255);
$image->fill_rectangle(0,0,400,400);
$image->save('./images/red.png');
try to display image in Perl/Tk
#!/usr/bin/perl
use strict;
use warnings;
use Tk;
my $mw = MainWindow->new;
$mw->title("Test");
my $image = $mw->Photo(-file => "images/red.bmp");
my $image_label = $mw->Label(-image => $image)->pack;
MainLoop;
Only the .bmp file displays other files have error.
"Uncaught exception from user code:
couldn't recognize data in image file "images/red.png" at
/usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21.
Tk::Image::new("Tk::Photo", MainWindow=HASH(0x560632dc9098), "-file",
"images/red.png") called at
/usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 63
Tk::Image::__ANON__(MainWindow=HASH(0x560632dc9098), "-file",
"images/red.png") called at ./test-image.pl line 8"
I've installed
Tk, libgraphics-magick-perl, libimage-imlib2-perl, tkagif, tkblt, tklib,
libtk-img, tkpng.
Now that I know .bmp works I can use that.
Wonder tho' why others don't display, Bookworm and Trixie.
If there is some other module to include I can't discover what it's name
is as yet.
Tk::Photo is a module but seems to be included in Perl/Tk
I'm not really understanding if the Perl/Tk is a rewrite or an interface
to Tk modules.
mick
Re: images in Perl/Tk
Hi, On Mon, 18 Mar 2024 19:23:39 + "mick.crane" wrote: > I try to load images with Perl/Tk but there is message, > "couldn't recognize data in image file "test.jpeg" at > /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21" > I've tried different images/pngs/jpgs with same error. > images load OK in other viewers. > Installed tkpng with apt. > > Anybody successfully used images with Perl/Tk? > Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and may > possibly help recognise the file format? > Or is there some 'pruning' of the images, made with Gimp, needed to > work with Tk? > > mick > I never used Tk with Perl, but first, you do not need tkpng for png images anymore, pngs have been supported natively by Tk for years. Maybe tkpng is broken (as at least some versions of img::png that came with debian have been)? Second, Tk does not support jpegs without third-party extensions; probably img::jpeg can help, so you could try to install libtk-img with apt and then do the Perl equivalent of package require img::jpeg Have a nice day, Michael
Re: images in Perl/Tk
"mick.crane" wrote: > I try to load images with Perl/Tk but there is message, > "couldn't recognize data in image file "test.jpeg" at > /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21" > I've tried different images/pngs/jpgs with same error. > images load OK in other viewers. > Installed tkpng with apt. > > Anybody successfully used images with Perl/Tk? You'll likely do better asking perl questions on e.g the perlmonks site. > Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and may > possibly help recognise the file format? Sorry, are you suggesting using versions different to that which came with the version you already have? Why would you even think of doing that? If you think the version of Tk you already have isn't working then replace the whole thing, not just bits of it. But I'd think that was premature myself. > Or is there some 'pruning' of the images, made with Gimp, needed to > work with Tk? > > mick >
images in Perl/Tk
I try to load images with Perl/Tk but there is message, "couldn't recognize data in image file "test.jpeg" at /usr/lib/x86_64-linux-gnu/perl5/5.38/Tk/Image.pm line 21" I've tried different images/pngs/jpgs with same error. images load OK in other viewers. Installed tkpng with apt. Anybody successfully used images with Perl/Tk? Would Tk::JPEG/Tk::PNG from cpan be happy with the Debian Tk and may possibly help recognise the file format? Or is there some 'pruning' of the images, made with Gimp, needed to work with Tk? mick
