Mercurial > octave-nkf
view scripts/image/private/__imwrite__.m @ 17338:1c89599167a6
maint: End m-files with 1 blank line.
Simplifies automated grammarchecking script.
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scripts/image/private/__imread__.m, scripts/image/private/__imwrite__.m,
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scripts/ui/private/message_dialog.m: End m-files with 1 blank line.
author | Rik <rik@octave.org> |
---|---|
date | Wed, 28 Aug 2013 08:33:02 -0700 |
parents | eb7e9a991ffb |
children | d63878346099 |
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## Copyright (C) 2008-2012 John W. Eaton ## Copyright (C) 2013 Carnë Draug ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## This function does all the work of imwrite. It exists here as private ## function so that imwrite can use other functions if imformats is ## configured to. It is also needed so that imformats can create a ## function handle for it. function __imwrite__ (img, varargin) if (nargin < 2 || ! (isnumeric (img) || islogical (img))) print_usage ("imwrite"); endif [filename, ext, map, param_list] = imwrite_filename (varargin{:}); if (isempty (img)) error ("imwrite: invalid empty image"); elseif (issparse (img) || issparse (map)) error ("imwrite: sparse images are not supported"); endif if (rem (numel (param_list), 2) != 0) error ("imwrite: no pair for all arguments (odd number left)"); endif ## set default for options options = struct ("writemode", "overwrite", "quality", 75, "alpha", cast ([], class (img))); for idx = 1:2:numel (param_list) switch (tolower (param_list{idx})) case "alpha" options.alpha = param_list{idx+1}; if (! isnumeric (options.alpha)) error ("imwrite: value for %s option must be a numeric matrix", param_list{idx}); elseif (size (options.alpha, 3) != 1) error ("imwrite: 3rd dimension of matrix for %s must be singleton", param_list{idx}); elseif (ndims (options.alpha) > 4 || any (size (options.alpha)([1 2]) != size (img)([1 2])) || size (options.alpha, 4) != size (img, 4)) error ("imwrite: matrix for %s must have same dimension as image", param_list{idx}); endif case "writemode", options.writemode = param_list{idx+1}; if (! ischar (options.writemode) || ! any (strcmpi (options.writemode, {"append", "overwrite"}))) error ('imwrite: value for %s option must be "append" or "overwrite"', param_list{idx}); endif options.writemode = tolower (options.writemode); case "quality", options.quality = param_list{idx+1}; if (! isnumeric (options.quality) || ! isscalar (options.quality) || options.quality < 0 || options.quality > 100) error ("imwrite: value for %s option must be a scalar between 0 and 100", param_list{idx}); endif options.quality = round (options.quality); otherwise error ("imwrite: invalid PARAMETER `%s'", varargin{idx}); endswitch endfor if (! isempty (map)) if (! iscolormap (map)) error ("imwrite: invalid MAP for indexed image"); elseif (ndims (img) != 2 && ndims (img) != 4) error ("imwrite: indexed image must have 2 or 4 dimensions (found %i)", ndims (img)); endif ## If the image is floating point, then we convert it to integer (makes ## it easier in __magick_write__ since it only handles integers. Also, ## if it's floating point, it has an offset of 1 if (isfloat (img)) if (rows (map) <= 256) img = uint8 (img - 1); else img = uint16 (img - 1); endif endif endif if (ndims (img) > 4) error ("imwrite: invalid %d-dimensional image data", ndims (img)); elseif (all (size (img, 3) != [1 3 4])) ## 1, 3, or 4 for grayscle, RGB, and CMYK respectively error ("imwrite: IMG 3rd dimension must be 1, 3, or 4"); endif __magick_write__ (filename, ext, img, map, options); endfunction