NAME
Math::Image::CalcResized - Calculate resized dimensions of image/video
VERSION
This document describes version 0.001 of Math::Image::CalcResized (from
Perl distribution Math-Image-CalcResized), released on 2020-09-23.
FUNCTIONS
calc_image_resized_size
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:
* size* => *str*
Image/video size, in x 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)
HOMEPAGE
Please visit the project's homepage at
.
SOURCE
Source repository is at
.
BUGS
Please report any bugs or feature requests on the bugtracker website
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.
SEE ALSO
AUTHOR
perlancar
COPYRIGHT AND LICENSE
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.