Imager::File::JPEG - read and write JPEG files
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) { ... }
Imager's JPEG support is documented in Imager::Files.
Besides providing JPEG support, Imager::File::JPEG has the following methods:
Imager::File::JPEG->libjpeg_version();
Returns version information about the variety of libjpeg Imager::File::JPEG was compiled with. This is determined at build time. This includes:
libjpeg
The library type, one of libjpeg, libjpeg-turbo or mozjpeg.
libjpeg-turbo
mozjpeg
version followed by the library version number.
version
api followed by the libjpeg API version.
api
For libjpeg the API and library versions are always equal.
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.
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.
Returns true if the libjpeg variant Imager::File::JPEG was built with has both encoding and decoding support for arithmetic coding.
Imager::File::JPEG
Returns true if the libjpeg variant Imager::File::JPEG was built with has encoding support for arithmetic coding.
Returns true if the libjpeg variant Imager::File::JPEG was built with has decoding support for arithmetic coding.
Tony Cook <tonyc@cpan.org>
Imager, Imager::Files.
To install Imager::File::JPEG, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Imager::File::JPEG
CPAN shell
perl -MCPAN -e shell install Imager::File::JPEG
For more information on module installation, please visit the detailed CPAN module installation guide.