Hi BMaximus,

You want to use BlobToImage(), like this:

my $image=Image::Magick->new(magick=>'gif');
$image->BlobToImage($blobdata);

[download]
You probably want to check that what you have *really is* a gif before you do anything with it though, otherwise ImageMagick will crash fairly horribly.

Also have a look at ImageToBlob() (does the obvious).

Docs are here: http://www.imagemagick.org/www/perl.html#blobs

Oh, and if you're using if for the web, it's probably good to have a cacheing proxy in front of it, if it's going to see much use, since ImageMagick is not all that nippy. We use Squid.

andy.

Update: I don't know why I assumed it was a gif. If the image could be more than one format, you could presumably call Image::Magick->new() without parameters, load the blob and use Image::Magick itself to detect the format. I haven't tried this though.

In reply to Re: Image::Magick and reading images from variables. by andye
in thread Image::Magick and reading images from variables. by BMaximus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.