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: * 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) 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 . 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.