JPEG(3pm)

Okay bestie, welcome to JPEG(3pm) — the Imager::File::JPEG manual page from the User Contributed Perl Documentation crew, and it's literally about reading and writing JPEG files. ✨

🌸 NAME 🌸

Imager::File::JPEG — read and write JPEG files. No cap. 💖

✨ SYNOPSIS ✨

Here's the whole vibe in code, bestie:

use Imager;

my $img = Imager->new;
$img->read(file=>"foo.jpg")
  or die $img->errstr;

$img->write(file => "foo.jpg")
  or die $img->errstr;

my $version = Imager::File::JPEG->libjpeg_version();
if (Imager::File::JPEG->is_turbojpeg) { ... }
if (Imager::File::JPEG->is_mozjpeg) { ... }

if (Imager::File::JPEG->has_arith_coding) { ... }

💅 DESCRIPTION 💅

Imager's JPEG support is documented in Imager::Files. That's the main-character doc, go read it. 🫶

Besides providing JPEG support, Imager::File::JPEG has the following methods:

🧚 libjpeg_version() 🧚

Imager::File::JPEG->libjpeg_version();

Returns version information about the variety of libjpeg that Imager::File::JPEG was compiled with. This is determined at build time, bestie. It includes:

• The library type, one of libjpeg, libjpeg-turbo or mozjpeg. 👑
• version followed by the library version number. 🔥
• api followed by the libjpeg API version. ✨

For libjpeg the API and library versions are always equal. Periodt.

🦋 is_turbojpeg() 🦋

Imager::File::JPEG->is_turbojpeg();

Returns true if Imager::File::JPEG was built with libjpeg-turbo. Note that mozjpeg is built on top of libjpeg-turbo, so this will return true for mozjpeg. 💀

🎀 is_mozjpeg() 🎀

Imager::File::JPEG->is_mozjpeg();

Returns true if Imager::File::JPEG was built with mozjpeg. Note that mozjpeg doesn't define its own version numbering, so mozjpeg is detected by defines that only mozjpeg currently defines. Iykyk. 🌈

💜 has_arith_coding() 💜

Returns true if the libjpeg variant that Imager::File::JPEG was built with has both encoding and decoding support for arithmetic coding. Both, bestie — encode AND decode. 🎀

⭐ has_encode_arith_coding() ⭐

Returns true if the libjpeg variant that Imager::File::JPEG was built with has encoding support for arithmetic coding. ✨

🌸 has_decode_arith_coding() 🌸

Returns true if the libjpeg variant that Imager::File::JPEG was built with has decoding support for arithmetic coding. ✨

👑 AUTHOR 👑

Tony Cook — tonyc@cpan.org — author icon, no cap. 🫶

🌈 SEE ALSO 🌈

• Imager
• Imager::Files

Go read these next, bestie. 💖

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Cute sign-off: this page is from perl v5.42.3, dated 2026-08-19, and yeah, it's JPEG(3pm). That's the footer tea. 💅✨