NAME
Math::Image::CalcResized - Calculate dimensions of image/video resized by ImageMagick-like geometry specification
VERSION
This document describes version 0.003 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 => ""); # -> "2592x1944"Example #2:
calc_image_resized_size(size => "2592x1944", resize => "20%"); # -> "518x388"Example #3:
calc_image_resized_size(size => "2592x1944", resize => "20%x40%"); # -> "518x777"Example #4:
calc_image_resized_size(size => "2592x1944", resize => "20x40%"); # -> "518x777"Example #5:
calc_image_resized_size(size => "2592x1944", resize => 1024); # -> "1024x768"Example #6:
calc_image_resized_size(size => "2592x1944", resize => "1024>"); # -> "1024x768"Example #7:
calc_image_resized_size(size => "2592x1944", resize => "10240>"); # -> "2592x1944"Example #8:
calc_image_resized_size(size => "2592x1944", resize => "1024^"); # -> "2592x1944"Example #9:
calc_image_resized_size(size => "2592x1944", resize => "10240^"); # -> "10240x7680"Example #10:
calc_image_resized_size(size => "2592x1944", resize => "x1024"); # -> "1365x1024"Example #11:
calc_image_resized_size(size => "2592x1944", resize => "x768>"); # -> "1024x768"Example #12:
calc_image_resized_size(size => "2592x1944", resize => "x7680>"); # -> "2592x1944"Example #13:
calc_image_resized_size(size => "2592x1944", resize => "x768^"); # -> "2592x1944"Example #14:
calc_image_resized_size(size => "2592x1944", resize => "x7680^"); # -> "10240x7680"Example #15:
calc_image_resized_size(size => "2592x1944", resize => "20000x10000"); # -> "2592x1944"Example #16:
calc_image_resized_size(size => "2592x1944", resize => "20000x1000"); # -> "1333x1000"Example #17:
calc_image_resized_size(size => "2592x1944", resize => "100x200"); # -> "100x75"Example #18:
calc_image_resized_size(size => "2592x1944", resize => "100x100"); # -> "100x75"Example #19:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000^"); # -> "10000x7500"Example #20:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000^"); # -> "13333x10000"Example #21:
calc_image_resized_size(size => "2592x1944", resize => "100x100^"); # -> "2592x1944"Example #22:
calc_image_resized_size(size => "2592x1944", resize => "100x100!"); # -> "100x100"Example #23:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000>"); # -> "2592x1944"Example #24:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000>"); # -> "2592x1944"Example #25:
calc_image_resized_size(size => "2592x1944", resize => "3000x1000>"); # -> "2592x1944"Example #26:
calc_image_resized_size(size => "2592x1944", resize => "2000x1000>"); # -> "1333x1000"Example #27:
calc_image_resized_size(size => "2592x1944", resize => "100x100>"); # -> "100x75"Example #28:
calc_image_resized_size(size => "2592x1944", resize => "10000x5000<"); # -> "10000x7500"Example #29:
calc_image_resized_size(size => "2592x1944", resize => "5000x10000<"); # -> "13333x10000"Example #30:
calc_image_resized_size(size => "2592x1944", resize => "3000x1000<"); # -> "2592x1944"Example #31:
calc_image_resized_size(size => "2592x1944", resize => "2000x1000<"); # -> "2592x1944"Example #32:
calc_image_resized_size(size => "2592x1944", resize => "100x100<"); # -> "2592x1944"Example #33:
calc_image_resized_size(size => "2592x1944", resize => "1024^>"); # -> "1365x1024"Example #34:
calc_image_resized_size(size => "2592x1944", resize => "10240^>"); # -> "2592x1944"Example #35:
calc_image_resized_size(size => "2592x1944", resize => "1024^<"); # -> "2592x1944"Example #36:
calc_image_resized_size(size => "2592x1944", resize => "10240^<"); # -> "13653x10240"Example #37:
calc_image_resized_size(size => "2592x1944", resize => "^1024>"); # -> "1024x768"Example #38:
calc_image_resized_size(size => "2592x1944", resize => "^10240>"); # -> "2592x1944"Example #39:
calc_image_resized_size(size => "2592x1944", resize => "^1024<"); # -> "2592x1944"Example #40:
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 -------------------------- ---------------------------------------------------------------- "" No resizing. 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)
image_resize_notation_to_human
Usage:
image_resize_notation_to_human(%args) -> [status, msg, payload, meta]Translate ImageMagick-like resize notation (e.g. "720^>") to human-friendly text (e.g. "shrink shortest side to 720px").
Examples:
Example #1:
image_resize_notation_to_human(resize => ""); # -> "no resizing"Example #2:
image_resize_notation_to_human(resize => "50%"); # -> "scale to 50%"Example #3:
image_resize_notation_to_human(resize => "50%x50%"); # -> "scale width to 50%, height to 50%"Example #4:
image_resize_notation_to_human(resize => 720); # -> "set width to 720px"Example #5:
image_resize_notation_to_human(resize => "720>"); # -> "shrink width to 720px"Example #6:
image_resize_notation_to_human(resize => "720^"); # -> "enlarge width to 720px"Example #7:
image_resize_notation_to_human(resize => "x720"); # -> "set height to 720px"Example #8:
image_resize_notation_to_human(resize => "x720>"); # -> "shrink height to 720px"Example #9:
image_resize_notation_to_human(resize => "x720^"); # -> "enlarge height to 720px"Example #10:
image_resize_notation_to_human(resize => "640x480"); # -> "fit image inside 640x480"Example #11:
image_resize_notation_to_human(resize => "640x480^"); # -> "fit image to fit 640x480 inside it"Example #12:
image_resize_notation_to_human(resize => "640x480>"); # -> "shrink image to fit inside 640x480"Example #13:
image_resize_notation_to_human(resize => "640x480<"); # -> "enlarge image to fit 640x480 inside it"Example #14:
image_resize_notation_to_human(resize => "640x480!"); # -> "set dimension to 640x480"Example #15:
image_resize_notation_to_human(resize => "720^>"); # -> "shrink shortest side to 720px"Example #16:
image_resize_notation_to_human(resize => "720^<"); # -> "enlarge shortest side to 720px"Example #17:
image_resize_notation_to_human(resize => "^720>"); # -> "shrink longest side to 720px"Example #18:
image_resize_notation_to_human(resize => "^720<"); # -> "enlarge longest side to 720px"
This function is not exported.
Arguments ('*' denotes required arguments):
resize* => str
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 https://metacpan.org/release/Math-Image-CalcResized.
SOURCE
Source repository is at https://github.com/perlancar/perl-Math-Image-CalcResized.
BUGS
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.
SEE ALSO
AUTHOR
perlancar <perlancar@cpan.org>
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.