Image::Magick results from the CPAN

PPresenter

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<TITLE>Portable Presenter; ImageMagick images</TITLE>

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<TR><TD WIDTH=15% VALIGN=top><IMG SRC=../images/ppresenter.png WIDTH=150 HEIGHT=170></TD>
    <TD ALIGN=center><H1>ImageMagick images</H1></TD></TR>
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<A HREF=../index.html>PPresenter</A><BR>
<A HREF=../manual.html>Manual</A><BR>
<A HREF=index.html>Images</A><BR>
<UL>
<LI><A HREF=tkphoto.html>tkPhoto</A>
<LI><B>Magick</B>
</UL>
<P>
Options:
<UL>
<LI><A HREF=index.html#general>general</A>
<LI><A HREF=#options>Magick</A>
</UL>
<A HREF=#functions>functions</A><BR>
<A HREF=#examples>Examples</A>
<P>

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An important part of the design of
<A HREF=../../index.html>Portable Presenter</A> is the requirement for
screen-size independency; fonts and also images are scaled, dependent on
the actual screen-size.
<P>
<BLOCKQUOTE>
<CODE>\begin{commercial}</CODE><BR>
<A HREF=http://wizards.dupont.com/cristy/ImageMagick/>ImageMagick</A> is an
excelent package which is able to read, convert, modify, and write close
to every type of image from script and from a graphical interface. Install it
now!<BR>
<CODE>\end{commercial}</CODE>
</BLOCKQUOTE>
PPresenter will automatically use Image::Magick when it is installed.  There is no
performance reason to decide differently.
<P>
You can defined Image::Magick images in two ways:
<UL>
<LI>Implicit: use an image in your slide description, for instance
    with
<PRE>
  $show->addSlide(-main =&gt; '&lt;IMG SRC=image.xpm&gt');
</PRE>
    In this case, you have created a Tk::Photo object via an Image::Magick
    object, but are not able to control it.
    Why not directly a <A HREF=tkphoto.html>Tk::Photo</A>?
    Because now you can use <EM>any</EM> image format, and get very nice
    scaling results for free!
    <P>

<LI>Explicit: define an image and refer to it later.  In contrary to
    Tk::Photo objects, the Image::Magick objects are not window dependent
    until displayed.
</UL>
The explicit way is demonstrated on this page. The implicit way is the
same for Tk::Photo objects and Image::Magick object, which is described
on the <A HREF=index.html>main image page</A>.

<H2><A NAME=options>Magick options</A></H2>

There are no special options for Image::Magick objects: the
<A HREF=index.html#general>general options</A> define all.

<H2><A NAME=functions>ImageMagick functions</A></H2>

If you want to create images with ImageMagick, you do not need to read the
documentation of PPresenter: they are not connected at all.  A small example to
demonstrate:
<PRE>
   use PPresenter;
   use Image::Magick;

   my $image = Image::Magick-&gt;new;
   $image-&gt;Read('image.tiff');
   $image-&gt;Scale('25%x50%');
   ...

   my $show = PPresenter-&gt;new;
   $show-&gt;image($image, -name =&gt; 'image');
</PRE>
On the moment you add the image to the show, the Magick structure is
taken.  You should not try to change the object after this.

<DL>
<DT><B>$show-&gt;image(</B><I>image, ..., image, options</I> <B>)</B>
<DD>Add one or more images to PPresenter.  Is equivalent to
    <PRE>
map {$show-&gt;image($_, <I>options</I>)}
    <I>image, image, ...</I>;
</PRE>
</DL>

<H2><A NAME=examples>Examples</A></H2>

<H4>Example 1: Own symbols for unordered lists</H4>

Usually, the dots used to precede a list-item in an unordered list (for
instance used by the <A HREF=../formatter/markup.html>markup formatter</A>),
is defined by the <A HREF=../decoration/index.html>decoration</A> option
<CODE>-nestImages</CODE>.  The dots can be specified as filename or as
objects.
<P>
<PRE>
   use PPresenter;
   use Image::Magick;

   my $dots = Image::Magick-&gt;new;
   $dots-&gt;Read('redball.gif', 'blueball.pct');

   my $show = PPresenter-&gt;new;
   my @p    = $show-&gt;image(@$dots);
   $show-&gt;change( decoration  =&gt; 'ALL'
                , -nestImages =&gt; [ undef, @p ] )
</PRE>
One Image::Magick can contain a list of images.

<P>
<HR NOSHADE>
Portable Presenter is written and maintained by
<A HREF=http://mark.overmeer.net>Mark Overmeer</A>.
Copyright (C) 2000-2002, Free Software Foundation FSF.


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