Image::Math::Constrain

Image::Math::Constrain is a Perl module that provides scaling math functions specially designed for image size constraining, including creating thumbnails. This module allows users to easily create a math object by providing width and height values. Users can also get the scaling values based on an arbitrary image by using the "constrain" method. In case the scaling value is equal to 1, the image does not require any further resizing.

The module offers various ways to specify constraints, such as setting the width or the height only, providing the values through an ARRAY reference, or using easy-to-read string forms. The object can then be serialised back to a string by calling the "as_string" method.

Many different approaches exist for limiting image sizes or generating thumbnails. However, Image::Math::Constrain ensures that the same logic is applied for all requirements. Given constraints for the width and/or height, the module checks if the image exceeds these constraints and scales down the image proportionally if necessary to fit within them.

This module is specifically designed to handle image size constraining and thumbnailing with accuracy and efficiency. Therefore, it can be used as a secondary tool in any module or script that requires such functionality.