Math::Image::CalcResized - Calculate dimensions of image/video resized by ImageMagick-like geometry specification
This document describes version 0.002 of Math::Image::CalcResized (from Perl distribution Math-Image-CalcResized), released on 2020-09-23.
Usage:
calc_image_resized_size(%args) -> [status, msg, payload, meta]
Given size of an image (in WxH, e.g. "2592x1944") and ImageMagick-like resize instruction (e.g. "1024p>"), calculate new resized image.
Examples:
Example #1:
calc_image_resized_size(size => "2592x1944", resize => "20%"); # -> "518x388"
Example #2:
calc_image_resized_size(size => "2592x1944", resize => "20%x40%"); # -> "518x777"
Example #3:
calc_image_resized_size(size => "2592x1944", resize => "20x40%"); # -> "518x777"
Example #4:
calc_image_resized_size(size => "2592x1944", resize => 1024); # -> "1024x768"
Example #5:
calc_image_resized_size(size => "2592x1944", resize => "1024>"); # -> "1024x768"
Example #6:
calc_image_resized_size(size => "2592x1944", resize => "10240>"); # -> "2592x1944"
Example #7:
calc_image_resized_size(size => "2592x1944", resize => "1024^"); # -> "2592x1944"
Example #8:
calc_image_resized_size(size => "2592x1944", resize => "10240^"); # -> "10240x7680"
Example #9:
calc_image_resized_size(size => "2592x1944", resize => "x1024"); # -> "1365x1024"
Example #10:
calc_image_resized_size(size => "2592x1944", resize => "x768>"); # -> "1024x768"
Example #11:
calc_image_resized_size(size => "2592x1944", resize => "x7680>"); # -> "2592x1944"
Example #12:
calc_image_resized_size(size => "2592x1944", resize => "x768^"); # -> "2592x1944"
Example #13:
calc_image_resized_size(size => "2592x1944", resize => "x7680^"); # -> "10240x7680"
Example #14:
calc_image_resized_size(size => "2592x1944", resize => "20000x10000"); # -> "2592x1944"
Example #15:
calc_image_resized_size(size => "2592x1944", resize => "20000x1000"); # -> "1333x1000"
Example #16:
calc_image_resized_size(size => "2592x1944", resize => "100x200"); # -> "100x75"
Example #17:
calc_image_resized_size(size => "2592x1944", resize => "100x100"); # -> "100x75"
Example #18:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000^"); # -> "10000x7500"
Example #19:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000^"); # -> "13333x10000"
Example #20:
calc_image_resized_size(size => "2592x1944", resize => "100x100^"); # -> "2592x1944"
Example #21:
calc_image_resized_size(size => "2592x1944", resize => "100x100!"); # -> "100x100"
Example #22:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000>"); # -> "2592x1944"
Example #23:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000>"); # -> "2592x1944"
Example #24:
calc_image_resized_size(size => "2592x1944", resize => "3000x1000>"); # -> "2592x1944"
Example #25:
calc_image_resized_size(size => "2592x1944", resize => "2000x1000>"); # -> "1333x1000"
Example #26:
calc_image_resized_size(size => "2592x1944", resize => "100x100>"); # -> "100x75"
Example #27:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000<"); # -> "10000x7500"
Example #28:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000<"); # -> "13333x10000"
Example #29:
calc_image_resized_size(size => "2592x1944", resize => "3000x1000<"); # -> "2592x1944"
Example #30:
calc_image_resized_size(size => "2592x1944", resize => "2000x1000<"); # -> "2592x1944"
Example #31:
calc_image_resized_size(size => "2592x1944", resize => "100x100<"); # -> "2592x1944"
Example #32:
calc_image_resized_size(size => "2592x1944", resize => "1024^>"); # -> "1365x1024"
Example #33:
calc_image_resized_size(size => "2592x1944", resize => "10240^>"); # -> "2592x1944"
Example #34:
calc_image_resized_size(size => "2592x1944", resize => "1024^<"); # -> "2592x1944"
Example #35:
calc_image_resized_size(size => "2592x1944", resize => "10240^<"); # -> "13653x10240"
Example #36:
calc_image_resized_size(size => "2592x1944", resize => "^1024>"); # -> "1024x768"
Example #37:
calc_image_resized_size(size => "2592x1944", resize => "^10240>"); # -> "2592x1944"
Example #38:
calc_image_resized_size(size => "2592x1944", resize => "^1024<"); # -> "2592x1944"
Example #39:
calc_image_resized_size(size => "2592x1944", resize => "^10240<"); # -> "10240x7680"
This function is not exported by default, but exportable.
Arguments ('*' denotes required arguments):
resize* => str
Resize instruction, follows ImageMagick format.
Resize instruction can be given in several formats:
Syntax Meaning -------------------------- ---------------------------------------------------------------- SCALE"%" Height and width both scaled by specified percentage. SCALEX"%x"SCALEY"%" Height and width individually scaled by specified percentages. (Only one % symbol needed.) WIDTH Width given, height automagically selected to preserve aspect ratio. WIDTH">" Shrink width if larger, height automagically selected to preserve aspect ratio. WIDTH"^" Enlarge width if smaller, height automagically selected to preserve aspect ratio. "x"HEIGHT Height given, width automagically selected to preserve aspect ratio. "x"HEIGHT">" Shrink height if larger, width automagically selected to preserve aspect ratio. "x"HEIGHT"^" Enlarge height if smaller, width automagically selected to preserve aspect ratio. WIDTH"x"HEIGHT Maximum values of height and width given, aspect ratio preserved. WIDTH"x"HEIGHT"^" Minimum values of height and width given, aspect ratio preserved. WIDTH"x"HEIGHT"!" Width and height emphatically given, original aspect ratio ignored. WIDTH"x"HEIGHT">" Shrinks an image with dimension(s) larger than the corresponding width and/or height argument(s). WIDTH"x"HEIGHT"<" Shrinks an image with dimension(s) larger than the corresponding width and/or height argument(s). NUMBER"^>" Shrink shortest side if larger than number, aspect ratio preserved. NUMBER"^<" Enlarge shortest side if larger than number, aspect ratio preserved. "^"NUMBER">" Shrink longer side if larger than number, aspect ratio preserved. "^"NUMBER"<" Enlarge longer side if larger than number, aspect ratio preserved.
Currently unsupported:
AREA"@" Resize image to have specified area in pixels. Aspect ratio is preserved. X":"Y Here x and y denotes an aspect ratio (e.g. 3:2 = 1.5).
Ref: http://www.imagemagick.org/script/command-line-processing.php#geometry
size* => str
Image/video size, in <width>x<height> format, e.g. 2592x1944.
Returns an enveloped result (an array).
First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.
Return value: (any)
Please visit the project's homepage at https://metacpan.org/release/Math-Image-CalcResized.
Source repository is at https://github.com/perlancar/perl-Math-Image-CalcResized.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Math-Image-CalcResized
When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.
perlancar <perlancar@cpan.org>
This software is copyright (c) 2020 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Math::Image::CalcResized, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Math::Image::CalcResized
CPAN shell
perl -MCPAN -e shell install Math::Image::CalcResized
For more information on module installation, please visit the detailed CPAN module installation guide.