in reply to Re: Re: TK::Photo -file -data
in thread TK::Photo -file -data

... for visualizing what i meant with having the imagedata in a dbmopned hash, I have rewritten the example.

First a script for creating the hash...
#!/usr/bin/perl

use GD;
use Tk;
use Tk::JPEG;
use MIME::Base64;

dbmopen %myhash, "myhash", 0666;
my $im = GD::Image->new('image.jpg');
my $img = encode_base64($im->jpeg());
$myhash{image} = $img;
dbmclose %myhash;

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... and the a script for showing the image - using the imagedata in the hash: 

#!/usr/bin/perl

use Tk;
use Tk::JPEG;

dbmopen %myhash, "myhash", 0666;
my $main = MainWindow->new();
my $image = $main->Photo("button", -data => $myhash{image}, -format =>
+ 'jpeg');
my $label= $main->Label(-image => "button");
$label->grid(-in => $main);
dbmclose %myhash;

MainLoop;

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One of the great things is the compression:
My image.jpg is 14.9 Kb.
When compressed it is 13.4 Kb.
When compressing the hash containing the imagedata - it's only 7.7 Kb.

That's cool.

Søren Schimkat

Replies are listed 'Best First'.
Re: Re: Re: Re: TK::Photo -file -data
by schimkat (Initiate) on Apr 18, 2002 at 14:23 UTC
    Now it works with GIF's. :-)
    Just use GD ver. 1.19 instead of 1.38 which is the current release.

    Script for creating hash:
    #!/usr/bin/perl

use GD;
use Tk;
use MIME::Base64;

dbmopen %myhash, "myhash", 0666;
open (GIF,"image.gif");
$im = newFromGif GD::Image(GIF);
close GIF;
my $img = encode_base64($im->gif);
$myhash{image} = $img;
dbmclose %myhash;

    [download]

    And a script for showing the image:
    #!/usr/bin/perl

use Tk;

dbmopen %myhash, "myhash", 0666;
my $main = MainWindow->new();
my $image = $main->Photo("button", -data => $myhash{image}, -format =>
+ 'gif');
my $label= $main->Label(-image => "button");
$label->grid(-in => $main);
dbmclose %myhash;

MainLoop;

    [download]


    Regards Søren Schimkat
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      ... and finally... a real life script: CatanAid

      I have dropped the hash and replaced it with a plain text file for better compatibillity with different platforms.

      Regards Søren Schimkat
[reply]
        I´ve been asked how I create the datafile for CatanAid - so here is the code I used for CatanAid v. 0.1 (current version): 
        #!/usr/bin/perl

use GD;
use Tk;
use MIME::Base64;

open (DATA, ">graphicsdata");

foreach (<images/*>) {
   my $type = (split/\//, $_)[1];
   foreach (<$_/*.gif>) {
      my $name = (split /\./,((split/\//, $_)[2]))[0];
      print "Adding imagedata to datafile: $type/$name ($_).\n";
      open (GIF, $_);
      $data = encode_base64((newFromGif GD::Image(GIF))->gif);
      close GIF;
      print DATA "<" . $type . "/" . $name . ">\n" . $data;
   }
}

close DATA;

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        The images are regular .gif images placed in a simple directory structure: 
        images/interface/expansionbutton.gif
images/interface/background.gif
images/interface/standardbutton.gif
images/landscapes/mountain.gif
images/landscapes/dessert.gif
images/landscapes/forest.gif
images/landscapes/hill.gif
images/landscapes/pasture.gif
images/landscapes/plain.gif
images/landscapes/sea.gif
images/ports/mountain.gif
images/ports/forest.gif
images/ports/hill.gif
images/ports/surprise.gif
images/ports/pasture.gif
images/ports/plain.gif

        [download]
        Well... this should put at lid on this discussion i´ve been having with myself. :-)

        Regards Søren Schimkat
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