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export_fig.m
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function [imageData, alpha] = export_fig(varargin) %#ok<*STRCL1,*DATST,*TNOW1>
%EXPORT_FIG Exports figures in a publication-quality format
%
% Examples:
% imageData = export_fig
% [imageData, alpha] = export_fig
% export_fig filename
% export_fig ... -<format>
% export_fig ... -nocrop
% export_fig ... -c[<val>,<val>,<val>,<val>]
% export_fig ... -transparent or: -transparent=<color>
% export_fig ... -native
% export_fig ... -m<val>
% export_fig ... -r<val>
% export_fig ... -a<val>
% export_fig ... -q<val>
% export_fig ... -p<val>
% export_fig ... -n<val> or: -n<val>,<val>
% export_fig ... -x<val> or: -x<val>,<val>
% export_fig ... -s<val> or: -s<val>,<val>
% export_fig ... -d<gs_option>
% export_fig ... -depsc
% export_fig ... -metadata <metaDataInfo>
% export_fig ... -<renderer>
% export_fig ... -<colorspace>
% export_fig ... -append
% export_fig ... -bookmark
% export_fig ... -clipboard<:format>
% export_fig ... -update
% export_fig ... -version
% export_fig ... -nofontswap
% export_fig ... -font_space <char>
% export_fig ... -linecaps
% export_fig ... -noinvert
% export_fig ... -preserve_size
% export_fig ... -options <optionsStruct>
% export_fig ... -silent
% export_fig ... -notify
% export_fig ... -regexprep <pattern> <replace>
% export_fig ... -xkcd
% export_fig ... -toolbar
% export_fig ... -menubar
% export_fig ... -contextmenu
% export_fig(..., handle)
% export_fig(..., figName)
%
% This function saves a figure or single axes to one or more vector and/or
% bitmap file formats, and/or outputs a rasterized version to the workspace,
% with the following properties:
% - Figure/axes reproduced as it appears on screen
% - Cropped/padded borders (optional)
% - Embedded fonts (vector formats)
% - Improved line and grid line styles
% - Anti-aliased graphics (bitmap formats)
% - Render images at native resolution (optional for bitmap formats)
% - Transparent background supported (pdf, eps, png, tif, gif)
% - Semi-transparent patch objects supported (png, tif)
% - RGB, CMYK or grayscale output (CMYK only with pdf, eps, tif)
% - Variable image compression, including lossless (pdf, eps, jpg)
% - Optional rounded line-caps (pdf, eps)
% - Optionally append to file (pdf, tif, gif)
% - Vector formats: pdf, eps, emf, svg
% - Bitmap formats: png, tif, jpg, bmp, gif, clipboard, export to workspace
%
% This function is especially suited to exporting figures for use in
% publications and presentations, because of the high quality and
% portability of media produced.
%
% Note that the background color and figure dimensions are reproduced
% (the latter approximately, and ignoring cropping & magnification) in the
% output file. For transparent background (and semi-transparent patch
% objects), use the -transparent option or set the figure 'Color' property
% to 'none'. To make axes transparent set the axes 'Color' property to
% 'none'. PDF, EPS, TIF & PNG are the only formats that support a transparent
% background; only TIF & PNG formats support transparency of patch objects.
%
% The choice of renderer (opengl/zbuffer/painters) has a large impact on the
% output quality. The default value (opengl for bitmaps, painters for vector
% formats) generally gives good results, but if you aren't satisfied
% then try another renderer. Notes:
% 1) For vector formats (EPS,PDF), only painters generates vector graphics
% 2) For bitmap formats, only opengl correctly renders transparent patches
% 3) For bitmap formats, only painters correctly scales line dash and dot
% lengths when magnifying or anti-aliasing
% 4) Fonts may be substituted with Courier when using painters
%
% When exporting to vector format (PDF & EPS) and bitmap format using the
% painters renderer, this function requires that ghostscript is installed
% on your system. You can download this from: http://www.ghostscript.com
% When exporting to EPS it additionally requires pdftops, from the Xpdf
% suite of functions. You can download this from: http://xpdfreader.com
%
% SVG output uses Matlab's built-in SVG export if available, or otherwise the
% fig2svg (https://github.com/kupiqu/fig2svg) or plot2svg
% (https://github.com/jschwizer99/plot2svg) utilities, if available.
% Note: cropping/padding are not supported in export_fig's SVG and EMF output.
%
% Inputs:
% filename - string containing the name (optionally including full or
% relative path) of the file the figure is to be saved as. If
% no path is specified, the figure is saved in the current folder.
% If no name and no output arguments are specified, the figure's
% FileName property is used. If this property is empty, then the
% default name 'export_fig_out' is used. If neither file extension
% nor a format parameter are specified, a ".png" is added to the
% filename and the figure saved in PNG format.
% Special case: if filename has .fig extension the current figure is
% saved to that file in Matlab FIG format; if no file is open, the
% specified file is regarded as input file, and used for re-export.
% -<format> - string(s) containing the output file extension(s). Options:
% '-pdf','-eps','emf','-svg','-png','-tif','-jpg','-gif' and '-bmp'.
% Multiple formats can be specified, without restriction.
% For example: export_fig('-jpg', '-pdf', '-png', ...)
% Note: '-tif','-tiff' are equivalent, and so are '-jpg','-jpeg'.
% -transparent - indicates that figure background should be made transparent.
% Note: PNG,GIF,TIF,PDF,EPS,EMF formats only. Implies -noinvert.
% -transparent=<color> convert all pixels in the specified color (RGB tripplet
% or a Matlab predefined color string e.g. 'r'). Usage examples:
% -transparent=g or -transparent=[1,.5,.2] or -transparent=80,65,235
% Optional suffix +-<value> adds tolerance to pixels color matching
% for example: -transparent=g+-30 or -transparent=[1,.5,.2]+-0.1
% Note: only supported by PNG,GIF,TIF formats.
% -nocrop - option indicating that empty margins should not be cropped.
% -c[<val>,<val>,<val>,<val>] - option indicating crop amounts. Must be
% a 4-element vector of numeric values: [top,right,bottom,left]
% where NaN/Inf indicates auto-cropping, 0 means no cropping, any
% other value means cropping in pixel amounts. e.g. '-c7,15,0,NaN'
% Note: this option is not supported by SVG and EMF formats.
% -p<val> - option to pad a border of width val to exported files, where
% val is either a relative size with respect to cropped image
% size (i.e. p=0.01 adds a 1% border). For EPS & PDF formats,
% val can also be integer in units of 1/72" points (abs(val)>1).
% val can be positive (padding) or negative (extra cropping).
% If used, the -nocrop flag will be ignored, i.e. the image will
% always be cropped and then padded. Default: 0 (i.e. no padding).
% Note: this option is not supported by SVG and EMF formats.
% -m<val> - option val indicates the factor to magnify the figure dimensions
% when generating bitmap outputs (does not affect vector formats).
% Default: '-m1' (i.e. val=1). Note: val~=1 slows down export_fig.
% -r<val> - option val indicates the resolution (in pixels per inch) to
% export bitmap and vector outputs, without changing dimensions of
% the on-screen figure. Default: '-r864' (for vector output only).
% Note: -m option overides -r option for bitmap exports only.
% -native - option indicating that the output resolution (when outputting
% a bitmap format) should be such that the vertical resolution
% of the first suitable image found in the figure is at the
% native resolution of that image. To specify a particular
% image to use, give it the tag 'export_fig_native'.
% Notes: This overrides any value set with the -m and -r options.
% It also assumes that the image is displayed front-to-parallel
% with the screen. The output resolution is approximate and
% should not be relied upon. Anti-aliasing can have adverse
% effects on image quality (disable with the -a1 option).
% -a1, -a2, -a3, -a4 - option indicating the amount of anti-aliasing (AA) to
% use for bitmap outputs, when GraphicsSmoothing is not available.
% '-a1'=no AA; '-a4'=max. Default: 3 for HG1, 1 for HG2.
% -<renderer> - option to force a particular renderer (painters, opengl or
% [in R2014a or older] zbuffer). Default value: opengl for bitmap
% formats or figures with patches and/or transparent annotations;
% painters for vector formats without patches/transparencies.
% -<colorspace> - option indicating which colorspace color figures should
% be saved in: RGB (default), CMYK or gray.
% Usage example: '-gray' creates a grayscale version of the figure.
% Note: CMYK is only supported in PDF, EPS and TIF output formats.
% -q<val> - option to vary bitmap image quality (PDF, EPS, JPG formats only).
% A larger val, in the range 0-100, produces higher quality and
% lower compression. val > 100 results in lossless compression.
% Default: '-q95' for JPG, ghostscript prepress default for PDF,EPS.
% Note: lossless compression can sometimes give a smaller file size
% than the default lossy compression, depending on the image type.
% -n<val> - option to set minimum output image size (bitmap formats only).
% The output size can be specified as a single value (for both rows
% & cols, e.g. -n200) or comma-separated values (e.g. -n300,400).
% Use an Inf value to keep a dimension unchanged (e.g. -n50,inf).
% Use a NaN value to keep aspect ratio unchanged (e.g. -n50,nan).
% -x<val> - option to set maximum output image size (bitmap formats only).
% The output size can be specified as a single value (for both rows
% & cols, e.g. -x200) or comma-separated values (e.g. -x300,400).
% Use an Inf value to keep a dimension unchanged (e.g. -x50,inf).
% Use a NaN value to keep aspect ratio unchanged (e.g. -x50,nan).
% -s<val> - option to scale output image to specific size (bitmap formats only).
% The fixed size can be specified as a single value (for rows=cols) or
% comma-separated values (e.g. -s300,400). Each value can be a scalar
% integer (signifying pixels) or percentage (e.g. -s125%). The scaling
% is done last, after any other cropping/rescaling due to other params.
% -append - option indicating that if the file already exists the figure is to
% be appended as a new page, instead of being overwritten (default).
% PDF, TIF & GIF output formats only (multi-image GIF = animated).
% -bookmark - option to indicate that a bookmark with the name of the
% figure is to be created in the output file (PDF format only).
% -clipboard - option to save output as an image on the system clipboard.
% -clipboard<:format> - copies to clipboard in the specified format:
% image (default), bitmap, emf, or pdf.
% Notes: Only -clipboard (or -clipboard:image, which is the same)
% applies export_fig parameters such as cropping, padding etc.
% -clipboard:image create a bitmap image using export_fig processing
% -clipboard:bitmap create a bitmap image as-is (no auto-cropping etc.)
% -clipboard:emf is vector format without auto-cropping; Windows-only
% -clipboard:pdf is vector format without cropping; not universally supported
% -d<gs_option> - option to indicate a ghostscript setting. For example,
% -dMaxBitmap=0 or -dNoOutputFonts (Ghostscript 9.15+).
% -depsc - option to use EPS level-3 rather than the default level-2 print
% device. This solves some bugs with Matlab's default -depsc2 device
% such as discolored subplot lines on images (vector formats only).
% -metadata <metaDataInfo> - adds the specified meta-data information to the
% exported file (PDF format only). metaDataInfo must be either a struct
% or a cell array with pairs of values: {'fieldName',fieldValue, ...}.
% Common metadata fields: Title,Author,Creator,Producer,Subject,Keywords
% -update - option to download and install the latest version of export_fig
% -version - return the current export_fig version, without any figure export
% -nofontswap - option to avoid font swapping. Font swapping is automatically
% done in vector formats (only): 11 standard Matlab fonts are
% replaced by the original figure fonts. This option prevents this.
% -font_space <char> - option to set a spacer character for font-names that
% contain spaces, used by EPS/PDF. Default: '' (i.e. no space char)
% -linecaps - option to create rounded line-caps (vector formats only).
% -noinvert - option to avoid setting figure's InvertHardcopy property to
% 'off' during output (this solves some problems of empty outputs).
% -preserve_size - option to preserve the figure's PaperSize property in output
% file (PDF/EPS formats only; default is to not preserve it).
% -options <optionsStruct> - format-specific parameters as defined in Matlab's
% documentation of the imwrite function, contained in a struct under
% the format name. For example to specify the JPG Comment parameter,
% pass a struct such as this: options.JPG.Comment='abc'. Similarly,
% options.PNG.BitDepth=4. Only used by PNG,TIF,JPG,GIF output formats.
% Options can also be specified as a cell array of name-value pairs,
% e.g. {'BitDepth',4, 'Author','Yair'} - these options will be used
% by all supported output formats of the export_fig command.
% -silent - option to avoid various warning and informational messages, such
% as version update checks, transparency or renderer issues, etc.
% -notify - option to notify the user when export is done, in both a console
% message and a popup dialog (allow opening the exported file/folder).
% -regexprep <old> <new> - replaces all occurances of <old> (a regular expression
% string or array of strings; case-sensitive), with the corresponding
% <new> string(s), in EPS/PDF files (only). See regexp function's doc.
% Warning: invalid replacement can make your EPS/PDF file unreadable!
% -xkcd - renders the axes in XKCD hand-drawn style (see http://xkcd.com)
% -toolbar - adds an interactive export button to the figure's toolbar
% -menubar - adds an interactive export menu to the figure's menubar
% -contextmenu - adds interactive export menu to figure context-menu (right-click)
% handle - handle of the figure, axes or uipanels (can be an array of handles
% but all the objects must be in the same figure) to be exported.
% Default: gcf (handle of current figure).
% figName - name (title) of the figure to export (e.g. 'Figure 1' or 'My fig').
% Overriden by handle (if specified); Default: current figure
%
% Outputs:
% imageData - MxNxC uint8 image array of the exported image.
% alpha - MxN single array of alphamatte values in the range [0,1],
% for the case when the background is transparent.
%
% Some helpful examples and tips can be found at:
% https://github.com/altmany/export_fig
%
% See also PRINT, SAVEAS, ScreenCapture (on the Matlab File Exchange)
%{
% Copyright (C) Oliver Woodford 2008-2014, Yair Altman 2015-
% The idea of using ghostscript is inspired by Peder Axensten's SAVEFIG
% (fex id: 10889) which is itself inspired by EPS2PDF (fex id: 5782).
% The idea for using pdftops came from the MATLAB newsgroup (id: 168171).
% The idea of editing the EPS file to change line styles comes from Jiro
% Doke's FIXPSLINESTYLE (fex id: 17928).
% The idea of changing dash length with line width came from comments on
% fex id: 5743, but the implementation is mine :)
% The idea of anti-aliasing bitmaps came from Anders Brun's MYAA (fex id:
% 20979).
% The idea of appending figures in pdfs came from Matt C in comments on the
% FEX (id: 23629)
% Thanks to Roland Martin for pointing out the colour MATLAB
% bug/feature with colorbar axes and transparent backgrounds.
% Thanks also to Andrew Matthews for describing a bug to do with the figure
% size changing in -nodisplay mode. I couldn't reproduce it, but included a
% fix anyway.
% Thanks to Tammy Threadgill for reporting a bug where an axes is not
% isolated from gui objects.
%}
%{
% 23/02/12: Ensure that axes limits don't change during printing
% 14/03/12: Fix bug in fixing the axes limits (thanks to Tobias Lamour for reporting it).
% 02/05/12: Incorporate patch of Petr Nechaev (many thanks), enabling bookmarking of figures in pdf files.
% 09/05/12: Incorporate patch of Arcelia Arrieta (many thanks), to keep tick marks fixed.
% 12/12/12: Add support for isolating uipanels. Thanks to michael for suggesting it.
% 25/09/13: Add support for changing resolution in vector formats. Thanks to Jan Jaap Meijer for suggesting it.
% 07/05/14: Add support for '~' at start of path. Thanks to Sally Warner for suggesting it.
% 24/02/15: Fix Matlab R2014b bug (issue #34): plot markers are not displayed when ZLimMode='manual'
% 25/02/15: Fix issue #4 (using HG2 on R2014a and earlier)
% 25/02/15: Fix issue #21 (bold TeX axes labels/titles in R2014b)
% 26/02/15: If temp dir is not writable, use the user-specified folder for temporary EPS/PDF files (Javier Paredes)
% 27/02/15: Modified repository URL from github.com/ojwoodford to /altmany; Indented main function; Added top-level try-catch block to display useful workarounds
% 28/02/15: Enable users to specify optional ghostscript options (issue #36)
% 06/03/15: Improved image padding & cropping thanks to Oscar Hartogensis
% 26/03/15: Fixed issue #49 (bug with transparent grayscale images); fixed out-of-memory issue
% 26/03/15: Fixed issue #42: non-normalized annotations on HG1
% 26/03/15: Fixed issue #46: Ghostscript crash if figure units <> pixels
% 27/03/15: Fixed issue #39: bad export of transparent annotations/patches
% 28/03/15: Fixed issue #50: error on some Matlab versions with the fix for issue #42
% 29/03/15: Fixed issue #33: bugs in Matlab's print() function with -cmyk
% 29/03/15: Improved processing of input args (accept space between param name & value, related to issue #51)
% 30/03/15: When exporting *.fig files, then saveas *.fig if figure is open, otherwise export the specified fig file
% 30/03/15: Fixed edge case bug introduced yesterday (commit #ae1755bd2e11dc4e99b95a7681f6e211b3fa9358)
% 09/04/15: Consolidated header comment sections; initialize output vars only if requested (nargout>0)
% 14/04/15: Workaround for issue #45: lines in image subplots are exported in invalid color
% 15/04/15: Fixed edge-case in parsing input parameters; fixed help section to show the -depsc option (issue #45)
% 21/04/15: Bug fix: Ghostscript croaks on % chars in output PDF file (reported by Sven on FEX page, 15-Jul-2014)
% 22/04/15: Bug fix: Pdftops croaks on relative paths (reported by Tintin Milou on FEX page, 19-Jan-2015)
% 04/05/15: Merged fix #63 (Kevin Mattheus Moerman): prevent tick-label changes during export
% 07/05/15: Partial fix for issue #65: PDF export used painters rather than opengl renderer (thanks Nguyenr)
% 08/05/15: Fixed issue #65: bad PDF append since commit #e9f3cdf 21/04/15 (thanks Robert Nguyen)
% 12/05/15: Fixed issue #67: exponent labels cropped in export, since fix #63 (04/05/15)
% 28/05/15: Fixed issue #69: set non-bold label font only if the string contains symbols (\beta etc.), followup to issue #21
% 29/05/15: Added informative error message in case user requested SVG output (issue #72)
% 09/06/15: Fixed issue #58: -transparent removed anti-aliasing when exporting to PNG
% 19/06/15: Added -update option to download and install the latest version of export_fig
% 07/07/15: Added -nofontswap option to avoid font-swapping in EPS/PDF
% 16/07/15: Fixed problem with anti-aliasing on old Matlab releases
% 11/09/15: Fixed issue #103: magnification must never become negative; also fixed reported error msg in parsing input params
% 26/09/15: Alert if trying to export transparent patches/areas to non-PNG outputs (issue #108)
% 04/10/15: Do not suggest workarounds for certain errors that have already been handled previously
% 01/11/15: Fixed issue #112: use same renderer in print2eps as export_fig (thanks to Jesús Pestana Puerta)
% 10/11/15: Custom GS installation webpage for MacOS. Thanks to Andy Hueni via FEX
% 19/11/15: Fixed clipboard export in R2015b (thanks to Dan K via FEX)
% 21/02/16: Added -c option for indicating specific crop amounts (idea by Cedric Noordam on FEX)
% 08/05/16: Added message about possible error reason when groot.Units~=pixels (issue #149)
% 17/05/16: Fixed case of image YData containing more than 2 elements (issue #151)
% 08/08/16: Enabled exporting transparency to TIF, in addition to PNG/PDF (issue #168)
% 11/12/16: Added alert in case of error creating output PDF/EPS file (issue #179)
% 13/12/16: Minor fix to the commit for issue #179 from 2 days ago
% 22/03/17: Fixed issue #187: only set manual ticks when no exponent is present
% 09/04/17: Added -linecaps option (idea by Baron Finer, issue #192)
% 15/09/17: Fixed issue #205: incorrect tick-labels when Ticks number don't match the TickLabels number
% 15/09/17: Fixed issue #210: initialize alpha map to ones instead of zeros when -transparent is not used
% 18/09/17: Added -font_space option to replace font-name spaces in EPS/PDF (workaround for issue #194)
% 18/09/17: Added -noinvert option to solve some export problems with some graphic cards (workaround for issue #197)
% 08/11/17: Fixed issue #220: axes exponent is removed in HG1 when TickMode is 'manual' (internal Matlab bug)
% 08/11/17: Fixed issue #221: alert if the requested folder does not exist
% 19/11/17: Workaround for issue #207: alert when trying to use transparent bgcolor with -opengl
% 29/11/17: Workaround for issue #206: warn if exporting PDF/EPS for a figure that contains an image
% 11/12/17: Fixed issue #230: use OpenGL renderer when exported image contains transparency (also see issue #206)
% 30/01/18: Updated SVG message to point to https://github.com/kupiqu/plot2svg and display user-selected filename if available
% 27/02/18: Fixed issue #236: axes exponent cropped from output if on right-hand axes
% 29/05/18: Fixed issue #245: process "string" inputs just like 'char' inputs
% 13/08/18: Fixed issue #249: correct black axes color to off-black to avoid extra cropping with -transparent
% 27/08/18: Added a possible file-open reason in EPS/PDF write-error message (suggested by "craq" on FEX page)
% 22/09/18: Xpdf website changed to xpdfreader.com
% 23/09/18: Fixed issue #243: only set non-bold font (workaround for issue #69) in R2015b or earlier; warn if changing font
% 23/09/18: Workaround for issue #241: don't use -r864 in EPS/PDF outputs when -native is requested (solves black lines problem)
% 18/11/18: Issue #261: Added informative alert when trying to export a uifigure (which is not currently supported)
% 13/12/18: Issue #261: Fixed last commit for cases of specifying axes/panel handle as input, rather than a figure handle
% 13/01/19: Issue #72: Added basic SVG output support
% 04/02/19: Workaround for issues #207 and #267: -transparent implies -noinvert
% 08/03/19: Issue #269: Added ability to specify format-specific options for PNG,TIF,JPG outputs; fixed help section
% 21/03/19: Fixed the workaround for issues #207 and #267 from 4/2/19 (-transparent now does *NOT* imply -noinvert; -transparent output should now be ok in all formats)
% 12/06/19: Issue #277: Enabled preservation of figure's PaperSize in output PDF/EPS file
% 06/08/19: Remove warning message about obsolete JavaFrame in R2019b
% 30/10/19: Fixed issue #261: added support for exporting uifigures and uiaxes (thanks to idea by @MarvinILA)
% 12/12/19: Added warning in case user requested anti-aliased output on an aliased HG2 figure (issue #292)
% 15/12/19: Added promo message
% 08/01/20: (3.00) Added check for newer version online (initialized to version 3.00)
% 15/01/20: (3.01) Clarified/fixed error messages; Added error IDs; easier -update; various other small fixes
% 20/01/20: (3.02) Attempted fix for issue #285 (unsupported patch transparency in some Ghostscript versions); Improved suggested fixes message upon error
% 03/03/20: (3.03) Suggest to upload problematic EPS file in case of a Ghostscript error in eps2pdf (& don't delete this file)
% 22/03/20: (3.04) Workaround for issue #15; Alert if ghostscript file not found on Matlab path
% 10/05/20: (3.05) Fix the generated SVG file, based on Cris Luengo's SVG_FIX_VIEWBOX; Don't generate PNG when only SVG is requested
% 02/07/20: (3.06) Significantly improved performance (speed) and fidelity of bitmap images; Return alpha matrix for bitmap images; Fixed issue #302 (-update bug); Added EMF output; Added -clipboard formats (image,bitmap,emf,pdf); Added hints for exportgraphics/copygraphics usage in certain use-cases; Added description of new version features in the update message; Fixed issue #306 (yyaxis cropping); Fixed EPS/PDF auto-cropping with -transparent
% 06/07/20: (3.07) Fixed issue #307 (bug in padding of bitmap images); Fixed axes transparency in -clipboard:emf with -transparent
% 07/07/20: (3.08) Fixed issue #308 (bug in R2019a and earlier)
% 18/07/20: (3.09) Fixed issue #310 (bug with tiny image on HG1); Fixed title cropping bug
% 23/07/20: (3.10) Fixed issues #313,314 (figure position changes if units ~= pixels); Display multiple versions change-log, if relevant; Fixed issue #312 (PNG: only use alpha channel if -transparent was requested)
% 30/07/20: (3.11) Fixed issue #317 (bug when exporting figure with non-pixels units); Potential solve also of issue #303 (size change upon export)
% 14/08/20: (3.12) Fixed some exportgraphics/copygraphics compatibility messages; Added -silent option to suppress non-critical messages; Reduced promo message display rate to once a week; Added progress messages during export_fig('-update')
% 07/10/20: (3.13) Added version info and change-log links to update message (issue #322); Added -version option to return the current export_fig version; Avoid JavaFrame warning message; Improved exportgraphics/copygraphics infomercial message inc. support of upcoming Matlab R2021a
% 10/12/20: (3.14) Enabled user-specified regexp replacements in generated EPS/PDF files (issue #324)
% 01/07/21: (3.15) Added informative message in case of setopacityalpha error (issue #285)
% 26/08/21: (3.16) Fixed problem of white elements appearing transparent (issue #330); clarified some error messages
% 27/09/21: (3.17) Made Matlab's builtin export the default for SVG, rather than fig2svg/plot2svg (issue #316); updated transparency error message (issues #285, #343); reduced promo message frequency
% 03/10/21: (3.18) Fixed warning about invalid escaped character when the output folder does not exist (issue #345)
% 25/10/21: (3.19) Fixed print error when exporting a specific subplot (issue #347); avoid duplicate error messages
% 11/12/21: (3.20) Added GIF support, including animated & transparent-background; accept format options as cell-array, not just nested struct
% 20/12/21: (3.21) Speedups; fixed exporting non-current figure (hopefully fixes issue #318); fixed warning when appending to animated GIF
% 02/03/22: (3.22) Fixed small potential memory leak during screen-capture; expanded exportgraphics message for vector exports; fixed rotated tick labels on R2021a+
% 02/03/22: (3.23) Added -toolbar and -menubar options to add figure toolbar/menubar items for interactive figure export (issue #73); fixed edge-case bug with GIF export
% 14/03/22: (3.24) Added support for specifying figure name in addition to handle; added warning when trying to export TIF/JPG/BMP with transparency; use current figure as default handle even when its HandleVisibility is not 'on'
% 16/03/22: (3.25) Fixed occasional empty files due to excessive cropping (issues #318, #350, #351)
% 01/05/22: (3.26) Added -transparency option for TIFF files
% 15/05/22: (3.27) Fixed EPS bounding box (issue #356)
% 04/12/22: (3.28) Added -metadata option to add custom info to PDF files; fixed -clipboard export (transparent and gray-scale images; deployed apps; old Matlabs)
% 03/01/23: (3.29) Use silent mode by default in deployed apps; suggest installing ghostscript/pdftops if required yet missing; fixed invalid chars in export filename; reuse existing figure toolbar if available
% 03/02/23: (3.30) Added -contextmenu option to add interactive context-menu items; fixed: -menubar,-toolbar created the full default figure menubar/toolbar if not shown; enlarged toolbar icon; support adding export_fig icon to custom toolbars; alert if specifying multiple or invalid handle(s)
% 20/02/23: (3.31) Fixed PDF quality issues as suggested by @scholnik (issues #285, #368); minor fixes for MacOS/Linux; use figure's FileName property (if available) as the default export filename; added -gif optional format parameter; Display the export folder (full pathname) in menu items when using -toolbar, -menubar and/or -contextmenu
% 21/02/23: (3.32) Fixed EPS export error handling in deployed apps; use Matlab's builtin EPS export if pdftops is not installed or fails; disabled EMF export option on MacOS/Linux; fixed some EMF warning messages; don't export PNG if only -toolbar etc were specified
% 23/02/23: (3.33) Fixed PDF -append (issue #369); Added -notify option to notify user when the export is done; propagate all specified export_fig options to -toolbar,-menubar,-contextmenu exports; -silent is no longer set by default in deployed apps (i.e. you need to call -silent explicitly)
% 23/03/23: (3.34) Fixed error when exporting axes handle to clipboard without filename (issue #372)
% 11/04/23: (3.35) Added -n,-x,-s options to set min, max, and fixed output image size (issue #315)
% 13/04/23: (3.36) Reduced (hopefully fixed) unintended EPS/PDF image cropping (issues #97, #318); clarified warning in case of PDF/EPS export of transparent patches (issues #94, #106, #108)
% 23/04/23: (3.37) Fixed run-time error with old Matlab releases (issue #374); -notify console message about exported image now displays black (STDOUT) not red (STDERR)
% 15/05/23: (3.38) Fixed endless recursion when using export_fig in Live Scripts (issue #375); don't warn about exportgraphics/copygraphics alternatives in deployed mode
% 30/05/23: (3.39) Fixed exported bgcolor of uifigures or figures in Live Scripts (issue #377)
% 06/07/23: (3.40) For Tiff compression, use AdobeDeflate codec (if available) instead of Deflate (issue #379)
% 29/11/23: (3.41) Fixed error when no filename is specified nor available in the exported figure (issue #381)
% 05/12/23: (3.42) Fixed unintended cropping of colorbar title in PDF export with -transparent (issues #382, #383)
% 07/12/23: (3.43) Fixed unintended modification of colorbar in bitmap export (issue #385)
% 21/02/24: (3.44) Fixed: text objects with normalized units were not exported in some cases (issue #373); added check for invalid ghostscript installation (issue #365)
% 02/05/24: (3.45) Display the builtin error message when uifigure cannot be exported (issue #387); fixed contour labels with non-default FontName incorrectly exported as Courier (issue #388)
% 09/05/24: (3.46) Added -xkcd option (thanks @slayton); added .fig input and output format (previously undocumented & buggy); redirect .tex output to matlab2tikz utility
% 05/11/24: (3.47) Fixed -transparency in case the default bgcolor is already used in the figure (issue #398); enabled specifying non-default transparency color via -transparency parameter; suppress warnings about setting figure position; multiple -xkcd fixes
%}
if nargout
[imageData, alpha] = deal([]);
end
displaySuggestedWorkarounds = true;
% Ensure the figure is rendered correctly _now_ so that properties like axes limits are up-to-date
drawnow;
pause(0.05); % this solves timing issues with Java Swing's EDT (http://undocumentedmatlab.com/blog/solving-a-matlab-hang-problem)
% Display promo (just once every 10 days!)
persistent promo_time
if isempty(promo_time)
try promo_time = getpref('export_fig','promo_time'); catch, promo_time=-inf; end
end
if abs(now-promo_time) > 10 && ~isdeployed
programsCrossCheck;
msg = char('Gps!qspgfttjpobm!Nbumbc!bttjtubodf-!qmfbtf!dpoubdu!=%?'-1);
url = char('iuuqt;00VoepdvnfoufeNbumbc/dpn0dpotvmujoh'-1);
displayPromoMsg(msg, url);
promo_time = now;
setpref('export_fig','promo_time',now)
end
% Use the current figure as the default figure handle
% temporarily set ShowHiddenHandles='on' to access figure with HandleVisibility='off'
try oldValue = get(0,'ShowHiddenHandles'); set(0,'ShowHiddenHandles','on'); catch, end
fig = get(0, 'CurrentFigure');
try set(0,'ShowHiddenHandles',oldValue); catch, end
% Parse the input arguments
argNames = {};
for idx = nargin:-1:1, argNames{idx} = inputname(idx); end
[fig, options] = parse_args(nargout, fig, argNames, varargin{:});
% Check for newer version and exportgraphics/copygraphics compatibility
currentVersion = 3.47;
if options.version % export_fig's version requested - return it and bail out
imageData = currentVersion;
return
end
if ~options.silent && ~isdeployed
% Check for newer version (not too often)
checkForNewerVersion(currentVersion); % this breaks in version 3.05- due to regexp limitation in checkForNewerVersion()
% Hint to users to use exportgraphics/copygraphics in certain cases
alertForExportOrCopygraphics(options);
%return
end
% Ensure that we have a scalar valid figure handle
if isequal(fig,-1)
return % silent bail-out
elseif isempty(fig)
error('export_fig:NoFigure','No figure found');
elseif numel(fig) > 1
error('export_fig:MultipleFigures','export_fig can only process one figure at a time');
elseif ~ishandle(fig)
error('export_fig:InvalidHandle','invalid figure handle specified to export_fig');
elseif ~isequal(getappdata(fig,'isExportFigCopy'),true)
oldWarn = warning('off','MATLAB:HandleGraphics:ObsoletedProperty:JavaFrame');
warning off MATLAB:ui:javaframe:PropertyToBeRemoved
hFig = handle(ancestor(fig,'figure'));
try jf = get(hFig,'JavaFrame_I'); catch, try jf = get(hFig,'JavaFrame'); catch, jf=1; end, end %#ok<JAVFM>
warning(oldWarn);
if isempty(jf) % this is a uifigure
%error('export_fig:uifigures','Figures created using the uifigure command or App Designer are not supported by export_fig. See %s for details.', hyperlink('https://github.com/altmany/export_fig/issues/261','issue #261'));
if numel(fig) > 1
error('export_fig:uifigure:multipleHandles', 'export_fig only supports exporting a single uifigure handle at a time; array of handles is not currently supported.')
elseif ~any(strcmpi(fig.Type,{'figure','axes'}))
error('export_fig:uifigure:notFigureOrAxes', 'export_fig only supports exporting a uifigure or uiaxes handle; other handles of a uifigure are not currently supported.')
end
% fig is either a uifigure or uiaxes handle
isUiaxes = strcmpi(fig.Type,'axes');
if isUiaxes
% Label the specified axes so that we can find it in the legacy figure
oldUserData = fig.UserData;
tempStr = tempname;
fig.UserData = tempStr;
end
try
% Create an invisible legacy figure at the same position/size as the uifigure
hNewFig = figure('Visible','off', 'Color',hFig.Color, ...
'Units',hFig.Units, 'Position',hFig.Position, ...
'MenuBar','none', 'ToolBar','none');
% Copy the uifigure contents onto the new invisible legacy figure
try
hChildren = allchild(hFig); %=uifig.Children;
copyobj(hChildren,hNewFig);
catch e
if ~options.silent
errMsg = 'Some uifigure controls cannot be exported by export_fig and will not appear in the generated output.';
warning('export_fig:uifigure:controls','%s\n%s',errMsg,e.message); %issue #387
end
end
try fig.UserData = oldUserData; catch, end % restore axes UserData, if modified above
setappdata(hNewFig,'isExportFigCopy',true); % avoid endless recursion (issue #375)
% Replace the uihandle in the input args with the legacy handle
if isUiaxes % uiaxes
% Locate the corresponding axes handle in the new legacy figure
hAxes = findall(hNewFig,'type','axes','UserData',tempStr);
if isempty(hAxes) % should never happen, check just in case
hNewHandle = hNewFig; % export the figure instead of the axes
else
hNewHandle = hAxes; % new axes handle found: use it instead of the uiaxes
end
else % uifigure
hNewHandle = hNewFig;
end
varargin(cellfun(@(c)isequal(c,fig),varargin)) = {hNewHandle};
% Rerun export_fig on the legacy figure (with the replaced handle)
[imageData, alpha] = export_fig(varargin{:});
% Delete the temp legacy figure and bail out
try delete(hNewFig); catch, end
return
catch err
% Clean up the temp legacy figure and report the error
try delete(hNewFig); catch, end
rethrow(err)
end
end
end
% If toolbar button was requested, add it to the specified figure(s)
if options.toolbar
addToolbarButton(hFig, options);
end
% If menubar menu was requested, add it to the specified figure(s)
if options.menubar
addMenubarMenu(hFig, options);
end
% If context-menu was requested, add it to the specified handle(s)
if options.contextmenu
addContextMenu(hFig, options);
end
% Isolate the subplot, if it is one
cls = all(ismember(get(fig, 'Type'), {'axes', 'uipanel'}));
if cls
% Given handles of one or more axes, so isolate them from the rest
fig = isolate_axes(fig);
else
% Check we have a figure
if ~isequal(get(fig, 'Type'), 'figure')
error('export_fig:BadHandle','Handle must be that of a figure, axes or uipanel');
end
% Get the old InvertHardcopy mode
old_mode = get(fig, 'InvertHardcopy');
end
% from this point onward, fig is assured to be a figure handle
% Hack the font units where necessary (due to a font rendering bug in print?).
% This may not work perfectly in all cases.
% Also it can change the figure layout if reverted, so use a copy.
magnify = options.magnify * options.aa_factor;
if isbitmap(options) && magnify ~= 1
fontu = findall(fig, 'FontUnits', 'normalized');
if ~isempty(fontu)
% Some normalized font units found
if ~cls
fig = copyfig(fig);
set(fig, 'Visible', 'off');
fontu = findall(fig, 'FontUnits', 'normalized');
cls = true;
end
set(fontu, 'FontUnits', 'points');
end
end
% Axes tweaks to avoid various exporting problems
try
% MATLAB "feature": axes limits and tick marks can change when printing
Hlims = findall(fig, 'Type', 'axes');
if ~cls
% Record the old axes limit and tick modes
Xlims = make_cell(get(Hlims, 'XLimMode'));
Ylims = make_cell(get(Hlims, 'YLimMode'));
Zlims = make_cell(get(Hlims, 'ZLimMode'));
Xtick = make_cell(get(Hlims, 'XTickMode'));
Ytick = make_cell(get(Hlims, 'YTickMode'));
Ztick = make_cell(get(Hlims, 'ZTickMode'));
Xlabel = make_cell(get(Hlims, 'XTickLabelMode'));
Ylabel = make_cell(get(Hlims, 'YTickLabelMode'));
Zlabel = make_cell(get(Hlims, 'ZTickLabelMode'));
try % XTickLabelRotation etc. was added in R2021a
Xtkrot = make_cell(get(Hlims, 'XTickLabelRotationMode'));
Ytkrot = make_cell(get(Hlims, 'YTickLabelRotationMode'));
Ztkrot = make_cell(get(Hlims, 'ZTickLabelRotationMode'));
catch
end % only in R2021a+
end
% Set all axes limit and tick modes to manual, so the limits and ticks can't change
% Fix Matlab R2014b bug (issue #34): plot markers are not displayed when ZLimMode='manual'
set_manual_axes_modes(Hlims, 'X');
set_manual_axes_modes(Hlims, 'Y');
if ~using_hg2(fig)
set_manual_axes_modes(Hlims, 'Z');
end
catch
% ignore - fix issue #4 (using HG2 on R2014a and earlier)
end
% Fix issue #21 (bold TeX axes labels/titles in R2014b when exporting to EPS/PDF)
try
if using_hg2(fig) && isvector(options)
% Set the FontWeight of axes labels/titles to 'normal'
% Fix issue #69: set non-bold font only if the string contains symbols (\beta etc.)
% Issue #243: only set non-bold font (workaround for issue #69) in R2015b or earlier
try isPreR2016a = verLessThan('matlab','8.7'); catch, isPreR2016a = true; end
if isPreR2016a
texLabels = findall(fig, 'type','text', 'FontWeight','bold');
symbolIdx = ~cellfun('isempty',strfind({texLabels.String},'\'));
if ~isempty(symbolIdx)
set(texLabels(symbolIdx), 'FontWeight','normal');
if ~options.silent
warning('export_fig:BoldTexLabels', 'Bold labels with Tex symbols converted into non-bold in export_fig (fix for issue #69)');
end
end
end
end
catch
% ignore
end
% Fix issue #42: non-normalized annotations on HG1 (internal Matlab bug)
annotationHandles = [];
try
if ~using_hg2(fig)
annotationHandles = findall(fig,'Type','hggroup','-and','-property','Units','-and','-not','Units','norm');
try % suggested by Jesús Pestana Puerta (jespestana) 30/9/2015
originalUnits = get(annotationHandles,'Units');
set(annotationHandles,'Units','norm');
catch
end
end
catch
% should never happen, but ignore in any case - issue #50
end
% Fix issue #46: Ghostscript crash if figure units <> pixels
pos = get(fig, 'Position'); % Fix issues #313, #314
oldFigUnits = get(fig,'Units');
set(fig,'Units','pixels');
pixelpos = get(fig, 'Position'); %=getpixelposition(fig);
% Fix issue #373: text objects with normalized units not properly exported in some cases
textn = findall(fig, 'Type','text', 'Units','normalized');
try set(textn,'units','data'); catch, end
% Save the original figure color
tcol = get(fig, 'Color');
tcol_orig = tcol;
% Set to print exactly what is there
if options.invert_hardcopy
try set(fig, 'InvertHardcopy', 'off'); catch, end % fail silently in uifigures
end
% Set the renderer
switch options.renderer
case 1
renderer = '-opengl';
case 2
renderer = '-zbuffer';
case 3
renderer = '-painters';
otherwise
renderer = '-opengl'; % Default for bitmaps
end
% Initialize
tmp_nam = '';
isBgColor = false(0);
exported_files = 0;
% Main processing
try
oldWarn = warning;
% If XKCD option was specified, render figure as XKCD before any export
if options.xkcd
xkcd_axes = xkcdify(fig);
end
% Export bitmap formats first
if isbitmap(options)
if abs(options.bb_padding) > 1
displaySuggestedWorkarounds = false;
error('export_fig:padding','For bitmap output (png,jpg,tif,bmp) the padding value (-p) must be between -1<p<1')
end
% Print large version to array
[A, bgcol, alpha] = getFigImage(fig, magnify, renderer, options, pixelpos);
% Get the background colour
if isempty(options.tcol), tcol = bgcol; else, tcol = options.tcol; end
if options.transparent
if (options.png || options.alpha || options.gif || options.tif)
try %options.aa_factor < 4 % default, faster but lines are not anti-aliased
% If all pixels are indicated as opaque (i.e. something went wrong with the Java screen-capture)
A2 = single(A);
tcol = single(tcol);
ttol = single(options.ttol);
isBgColor = abs(A2(:,:,1)-tcol(1)) <= ttol & ...
abs(A2(:,:,2)-tcol(2)) <= ttol & ...
abs(A2(:,:,3)-tcol(3)) <= ttol;
% Set the bgcolor pixels to be fully-transparent
%A(repmat(isBgColor,[1,1,3])) = 254; %=off-white % TODO: more memory efficient without repmat
alpha(isBgColor) = 0;
catch % older logic - much slower and causes figure flicker
if true % to fold the code below...
% Get out an alpha channel
% MATLAB "feature": black colorbar axes can change to white and vice versa!
hCB = findall(fig, 'Type','axes', 'Tag','Colorbar');
if isempty(hCB)
yCol = [];
xCol = [];
else
yCol = get(hCB, 'YColor');
xCol = get(hCB, 'XColor');
if iscell(yCol)
yCol = cell2mat(yCol);
xCol = cell2mat(xCol);
end
yCol = sum(yCol, 2);
xCol = sum(xCol, 2);
end
% MATLAB "feature": apparently figure size can change when changing
% colour in -nodisplay mode
% Set the background colour to black, and set size in case it was
% changed internally
set(fig, 'Color', 'k', 'Position', pos);
% Correct the colorbar axes colours
set(hCB(yCol==0), 'YColor', [0 0 0]);
set(hCB(xCol==0), 'XColor', [0 0 0]);
% Correct black axes color to off-black (issue #249)
hAxes = findall(fig, 'Type','axes');
[hXs,hXrs] = fixBlackAxle(hAxes, 'XColor');
[hYs,hYrs] = fixBlackAxle(hAxes, 'YColor');
[hZs,hZrs] = fixBlackAxle(hAxes, 'ZColor');
% The following code might cause out-of-memory errors
try
% Print large version to array
B = print2array(fig, magnify, renderer);
% Downscale the image
B = downsize(single(B), options.aa_factor);
catch
% This is more conservative in memory, but kills transparency (issue #58)
B = single(print2array(fig, magnify/options.aa_factor, renderer));
end
% Set background to white (and set size)
set(fig, 'Color', 'w', 'Position', pos);
% Correct the colorbar axes colours
set(hCB(yCol==3), 'YColor', [1 1 1]);
set(hCB(xCol==3), 'XColor', [1 1 1]);
% Revert the black axes colors
set(hXs, 'XColor', [0,0,0]);
set(hYs, 'YColor', [0,0,0]);
set(hZs, 'ZColor', [0,0,0]);
set(hXrs, 'Color', [0,0,0]);
set(hYrs, 'Color', [0,0,0]);
set(hZrs, 'Color', [0,0,0]);
% The following code might cause out-of-memory errors
try
% Print large version to array
A = print2array(fig, magnify, renderer);
% Downscale the image
A = downsize(single(A), options.aa_factor);
catch
% This is more conservative in memory, but kills transparency (issue #58)
A = single(print2array(fig, magnify/options.aa_factor, renderer));
end
% Workaround for issue #15
szA = size(A);
szB = size(B);
if ~isequal(szA,szB)
A = A(1:min(szA(1),szB(1)), 1:min(szA(2),szB(2)), :);
B = B(1:min(szA(1),szB(1)), 1:min(szA(2),szB(2)), :);
if ~options.silent
warning('export_fig:bitmap:sizeMismatch','Problem detected by export_fig generation of a bitmap image; the generated export may look bad. Try to reduce the figure size to fit the screen, or avoid using export_fig''s -transparent option.')
end
end
% Compute the alpha map
alpha = round(sum(B - A, 3)) / (255 * 3) + 1;
A = alpha;
A(A==0) = 1;
A = B ./ A(:,:,[1 1 1]);
clear B
end %folded code...
end
%A = uint8(A);
else % JPG,BMP
warning('export_fig:unsupported:background','Matlab cannot set transparency when exporting JPG/BMP image files (see imwrite function documentation)')
end
end
% Downscale the image if its size was increased (for anti-aliasing)
if size(A,1) > 1.1 * options.magnify * pixelpos(4) %1.1 to avoid edge-cases
% Downscale the image
A = downsize(A, options.aa_factor);
alpha = downsize(alpha, options.aa_factor);
end
% Crop the margins based on the bgcolor, if requested
if options.crop
%[alpha, v] = crop_borders(alpha, 0, 1, options.crop_amounts);
%A = A(v(1):v(2),v(3):v(4),:);
[A, vA, vB] = crop_borders(A, bgcol, options.bb_padding, options.crop_amounts);
if ~any(isnan(vB)) % positive padding
sz = size(A); % Fix issue #308
B = repmat(uint8(zeros(1,1,size(alpha,3))),sz([1,2])); % Fix issue #307 %=zeros(sz([1,2]),'uint8');
B(vB(1):vB(2), vB(3):vB(4), :) = alpha(vA(1):vA(2), vA(3):vA(4), :); % ADDED BY OH
alpha = B;
else % negative padding
alpha = alpha(vA(1):vA(2), vA(3):vA(4), :);
end
end
% Get the non-alpha image (presumably unneeded with Java-based screen-capture)
%{
if isbitmap(options)
% Modify the intensity of the pixels' RGB values based on their alpha transparency
% TODO: not sure that we want this with Java screen-capture values!
alph = alpha(:,:,ones(1, size(A, 3)));
A = uint8(single(A) .* alph + 255 * (1 - alph));
end
%}
% Revert the figure properties back to their original values
oldWarn = warning('off','MATLAB:Figure:SetPosition');
try set(fig, 'Units',oldFigUnits, 'Position',pos, 'Color',tcol_orig); catch, end
warning(oldWarn);
% Check for greyscale images
if options.colourspace == 2
% Convert to greyscale
A = rgb2grey(A);
else
% Return only one channel for greyscale
A = check_greyscale(A);
end
% Change alpha from [0:255] uint8 => [0:1] single from here onward:
alpha = single(alpha) / 255;
% Clamp the image's min/max size (if specified)
sz = size(A); sz(3:end) = []; %sz=size(A,1:2); %issue #374 & X. Xu PM
szNew = options.min_size;
if numel(szNew) == 2
szNew(isinf(szNew)) = 0;
szNew = round(max(sz,szNew,'includenan'));
idxToCompare = ~isnan(szNew);
if ~isequal(sz(idxToCompare), szNew(idxToCompare))
A = imresize(A,szNew);
alpha = imresize(alpha,szNew);
end
end
szNew = options.max_size;
if numel(szNew) == 2
szNew(szNew <= 1) = inf;
szNew = round(min(sz,szNew,'includenan'));
idxToCompare = ~isnan(szNew);
if ~isequal(sz(idxToCompare), szNew(idxToCompare))
A = imresize(A,szNew);
alpha = imresize(alpha,szNew);
end
end
% Clamp the image's fixed size (if specified) - has to be done last!
szNew = options.fixed_size;
if numel(szNew) == 2
if szNew(1) < 0, szNew(1) = round(-sz(1)*szNew(1)/100); end
if szNew(2) < 0, szNew(2) = round(-sz(2)*szNew(2)/100); end
szNew(szNew <= 1) = inf;
szNew(isinf(szNew)) = sz(isinf(szNew)); % unchanged dimensions
idxToCompare = ~isnan(szNew);
if ~isequal(sz(idxToCompare), szNew(idxToCompare))
A = imresize(A,szNew);
alpha = imresize(alpha,szNew);
end
end
% Outputs
if options.im
imageData = A;
end
if options.alpha
imageData = A;
%alpha = ones(size(A, 1), size(A, 2), 'single'); %=all pixels opaque
end
% Save the images
if options.png
% Compute the resolution
res = options.magnify * get(0, 'ScreenPixelsPerInch') / 25.4e-3;
% Save the png
[format_options, bitDepth] = getFormatOptions(options, 'png'); %Issue #269
filename = [options.name '.png'];
pngOptions = {filename, 'ResolutionUnit','meter', 'XResolution',res, 'YResolution',res, format_options{:}}; %#ok<CCAT>
if options.transparent % Fix issue #312: only use alpha channel if -transparent was requested
pngOptions = [pngOptions 'Alpha',double(alpha)];
end
if ~isempty(bitDepth) && bitDepth < 16 && size(A,3) == 3
% BitDepth specification requires using a color-map
[img, map] = rgb2ind(A, 256);
imwrite(img, map, pngOptions{:});
else
imwrite(A, pngOptions{:});
end
if options.notify, notify(filename); end
end
if options.bmp
filename = [options.name '.bmp'];
imwrite(A, filename);
if options.notify, notify(filename); end
end
if options.jpg
% Save jpeg with the specified quality
quality = options.quality;
if isempty(quality)
quality = 95;
end
format_options = getFormatOptions(options, 'jpg'); %Issue #269
filename = [options.name '.jpg'];
if quality > 100
imwrite(A, filename, 'Mode','lossless', format_options{:});
else
imwrite(A, filename, 'Quality',quality, format_options{:});
end
if options.notify, notify(filename); end
end
if options.tif
% Save tif images in cmyk if wanted (and possible)
if options.colourspace == 1 && size(A, 3) == 3
img = double(255 - A);
K = min(img, [], 3);
K_ = 255 ./ max(255 - K, 1);
C = (img(:,:,1) - K) .* K_;
M = (img(:,:,2) - K) .* K_;
Y = (img(:,:,3) - K) .* K_;
img = uint8(cat(3, C, M, Y, K));
clear C M Y K K_
else
img = A;
end
resolution = options.magnify * get(0,'ScreenPixelsPerInch');
filename = [options.name '.tif'];
if options.transparent && any(alpha(:) < 1) && any(isBgColor(:))
% Need to use low-level Tiff library since imwrite/writetif doesn't support alpha channel
alpha8 = uint8(alpha*255);
tag = ['Matlab ' version ' export_fig v' num2str(currentVersion)];
mode = 'w'; if options.append, mode = 'a'; end
t = Tiff(filename,mode); %R2009a or newer
%See https://www.awaresystems.be/imaging/tiff/tifftags/baseline.html
t.setTag('ImageLength', size(img,1));
t.setTag('ImageWidth', size(img,2));
t.setTag('Photometric', Tiff.Photometric.RGB);
try %issue #379 use Tiff.Compression.AdobeDeflate by default
compressionMode = Tiff.Compression.AdobeDeflate;
catch
warning off imageio:tiffmexutils:libtiffWarning %issue #379
compressionMode = Tiff.Compression.Deflate;
end
t.setTag('Compression', compressionMode);
t.setTag('PlanarConfiguration', Tiff.PlanarConfiguration.Chunky);
t.setTag('ExtraSamples', Tiff.ExtraSamples.AssociatedAlpha);
t.setTag('ResolutionUnit', Tiff.ResolutionUnit.Inch);
t.setTag('BitsPerSample', 8);
t.setTag('SamplesPerPixel',size(img,3)+1); %+1=alpha channel
t.setTag('XResolution', resolution);
t.setTag('YResolution', resolution);
t.setTag('Software', tag);
t.write(cat(3,img,alpha8));
t.close;
else
% Use the builtin imwrite/writetif function
append_mode = {'overwrite', 'append'};
mode = append_mode{options.append+1};
format_options = getFormatOptions(options, 'tif'); %Issue #269
imwrite(img, filename, 'Resolution',resolution, 'WriteMode',mode, format_options{:});
end
if options.notify, notify(filename); end
end
if options.gif
% TODO - merge contents with im2gif.m
% Convert to color-map image required by GIF specification
[img, map] = rgb2ind(A, 256);
% Handle the case of trying to append to non-existing GIF file
% (imwrite() croaks when asked to append to a non-existing file)
filename = [options.name '.gif'];
options.append = options.append && existFile(filename);
% Set the default GIF options for imwrite()
append_mode = {'overwrite', 'append'};
writeMode = append_mode{options.append+1};
gifOptions = {'WriteMode',writeMode};
if options.transparent % only use alpha channel if -transparent was requested