CentOS 7.0 - man page for tk::animation (centos section 3)
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Animation(3) User Contributed Perl Documentation Animation(3)
Tk::Animation - Display sequence of Tk::Photo images
my $img = $widget->Animation('-format' => 'gif', -file => 'somefile.gif');
$img->start_animation( $period );
$img->set_image( 0 .. $#frames );
$img->resume_animation( $period );
$img->fast_forward( $multiplier );
$img->fast_reverse( $multiplier );
$img->set_disposal_method( $boolean );
In the simple case when "Animation" is passed a GIF89 style GIF with multiple 'frames', it
will build an internal array of "Photo" images.
The "add_frame" method adds images to the sequence. It is provided to allow animations to
be constructed from separate images. All images must be "Photo"s and should all be the
"start_animation($period)" then initiates a "repeat" with specified $period to sequence
through these images. As for raw "repeat" $period is in milliseconds, for a 50Hz monitor
it should be at least 20ms. If $period is omitted it is determined from the GIF metadata
(see below), or if this is not possible it defaults to 100 milliseconds.
"stop_animation" cancels the "repeat" and resets the image to the first image in the
For fine-grained control "next_image" and "prev_image" move one frame forward or backward.
"set_image" randomly positions the animation to a particular frame.
"pause_animation" pauses the movie and "resume_animation" continues from the pause point.
"fast_forward" and "fast_reverse" speed through the movie either forwards or backwards.
$multiplier specifies how much faster the animation moves.
If Image::Info is installed, then the repeat period time and disposal method of GIF
animations are determined from the GIF metadata directly. Otherwise the disposal method
must be set manually by using "set_disposal_method" (1 for blanking the previous images, 0
for leaving the previous images as is). The repeat period time may be given in the
"set_disposal_method" was formerly known as "blank" method, but the naming of this method
was a mistake.
If the disposal method is not set correctly, either by "set_disposal_method" or by
determining from the GIF metadata, then the following may happen: By default Animation
leaves the previous movie frame in the animation photo. Many times overlaying subsequent
frames produces a composite that looks blurred.
This module should not depend on a module which is not declared as a dependency
The delays between images may vary in a GIF animation. This cannot be handled by this
The handling of the various disposal methods is not correct.
perl v5.16.3 2014-06-10 Animation(3)
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