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This way you can use your image <tt>mypic.pdf</tt> :
Additional parametersReplace `http://proxy.example.com:3128` with the proxy URL. To disable the proxy again:
* scale = ''scaling value''== HTTPS ===* factor = max, fit, broad* wfactorFor self-signed certificates retrieved over HTTPS, hfactor = maxthe `curl` command requires a flag to retrieve insecure files, fit, broad, ''value''which is not enabled by default. Open `tex/texmf-context/tex/context/base/mkiv/data-sch.lua` to find:* width, height = ''dimension''* frame = on, off<pre>* presetlocal function runcurl(name, preview, repeat, object = yes, nocachename) -- we use sockets instead or the curl library when possible* display local command = ''file "curl --silent --create-dirs --output " .. cachename .. " " .. name''* type, method = eps, mps, pdf, tif, png, jpg, mov, texos.spawn(command)end</pre> Insert the `-k` or `--insecure` option:
If only one dimension is given, scaling is proportional<pre> local command = "curl --insecure --silent --create-dirs --output " .. cachename .. " " .. name</pre>
ConTeXt looks in Embedding inline images via base64 encoding using the current memstream function (supports pdf and parent directory plus those given in <tt>texmf.cnf</tt>.png streams):
You can define your own image directory with:
or even for multiple directories:
<texcode>
\setupexternalfigures[directory={../drawings,../bitmaps}]
</texcode>
You can define the path relative or absolute, but use always forward slashes!
Declaration of all used pictures in your environment, project or header file is better than direct use of file names in your code.== Image Settings ==
Same options as above. You can even inherit them like this:<texcode>\defineexternalfigure[logo-settings] [width=3cm]</texcode>
<texcode>\useexternalfigure[dummy][nofile][width=\textwidth]\useexternalfigure[myone][my_pic_one][dummy]\useexternalfigure[mytwo][my_pic_two][dummy]And then to use these settings in an image, use:
Somewhere in your text there's <texcode>\externalfigure[myonegroup.pdf][logo-settings].</texcode>
== Place picture in the text ==or, if you want to add or override settings, use:
You can directly place a figure in a text using <tttexcode>\externalfigure[cowgroup.pdf]</tt>. If you want to align it not to the baseline, but lower you can try whether <tt>\bbox{\externalfigure[cowlogo-settings]</tt> does the right thing, otherwise you have to tweek <tt>\smash{\lower24pt\hbox{\externalfigure [cowheight=2cm]}}</tttexcode>
That's Suppose your document contains an undocumented feature Hans told us about in a [http://archiveimage at multiple locations; all of these images are to be of the same size, which is not necessarily the same as the natural size of the image.contextgardenFurthermore, as before, you want to set the size of all the images by changing only one setup.net/message/20080624.074046.56e76622.en.html mail from 2008-06-24]Here, the macro to use is {{cmd|useexternalfigure}}, which defines a symbolic label for inserting an image plus settings.For example:
It's <texcode>\useexternalfigure[http://sourcemylogo] [logo.contextgarden.net/tex/context/base/cont-new.tex?searchpdf][width=hangaround in the source2cm].</texcode>
\starthangaround{<texcode>\externalfigure[cowmylogo]}\input tufte\stophangaround</contexttexcode>
<cmd>starthangaround</cmd> is influenced by <cmd>setuphanging[distance=...]</cmd> (distance may even be negative!), but takes no parameters itself.
== Movies ==aren't recognized automatically yet; they must be delcared verbosely:
Movies aren't recognized automatically yet, you need a more verbose declaration:
→Visualize Bounding Box: <pre> no longer processes tags ...
< [[Graphics]] | [[Combinations]] | [[File Formats|Supported Media File Formats]] | [[Including pages from PDF documentdocuments]] | [[Animation]] | [[Downsampling]] >
=Usage = Direct The simplest way to insert an image is to use : <texcode>\externalfigure[logo.pdf]</texcode> This command places the PDF image <tt>logo.pdf</tt> in a {{cmd|vbox}}; the width and height of the image are equal to the natural dimensions of the image. To set the width of the image to a specific size, say <tt>1cm</tt>, use: <texcode>\externalfigure[logo.pdf][width=1cm]</texcode> Similarly, to set the height of the image to a specific size, say <tt>2cm</tt>, use: <texcode>\externalfigure[logo.pdf][height=2cm]</texcode> If only the <tt>width</tt> or <tt>height</tt> of the image is specified, the other dimension is scaled appropriately to keep the aspect ratio. To include a specific page, say page 5, of a multi-page PDF file, use: <texcode>\externalfigure[logo.pdf][page=5]</texcode> These four variations cover the most common use cases. == File Formats == ConTeXt supports the image formats enumerated below. The image format is determined from the file extension (case insensitive). * '''PDF''': File extension <tt>.pdf</tt>* '''MPS''' (MetaPost output): File extension <tt>.mps</tt> or <tt>.<digits></tt>* '''JPEG''': File extension <tt>.jpg</tt> or <tt>.jpeg</tt>* '''PNG''': File extension <tt>.png</tt>* '''JPEG 2000''': File extension <tt>.jp2</tt>* '''JBIG''' or '''JBIG2''': File extension <tt>.jbig</tt>, <tt>.jbig2</tt>, or <tt>.jb2</tt> == Image Conversion == The image file formats listed in the previous section are the ones that may be embedded directly in a PDF. ConTeXt also supports a few other formats that are first converted to PDF using an external program. Of course, for such a conversion to work, the corresponding converter must be in the <tt>PATH</tt>. <table><tr class="odd"><td align="left">Format</td><td align="left">Extension</td><td align="left">Converter</td></tr><tr class="even"><td align="left"><strong>SVG</strong></td><td align="left"><code>.svg</code>, <code>.svgz</code></td><td align="left"><code>inkscape</code></td></tr><tr class="odd"><td align="left"><strong>EPS</strong></td><td align="left"><code>.eps</code>, <code>.ai</code></td><td align="left"><code>gs</code> (or <code>gswin32c</code> on Windows) from Ghostscript</td></tr><tr class="even"><td align="left"><strong>GIF</strong></td><td align="left"><code>.gif</code></td><td align="left"><code>gm</code> from GraphicsMagick</td></tr><tr class="odd"><td align="left"><strong>TIFF</strong></td><td align="left"><code>.tiff</code></td><td align="left"><code>gm</code> from GraphicsMagick</td></tr></table> The conversion generates a PDF file with prefix <tt>m_k_i_v_</tt> and a suffix <tt>.pdf</tt> added to the name of the original file. The result is cached, and the conversion is rerun if the timestamp of the original file is newer than that of the converted file. It is possible to change the converter used with the following code: <pre>\startluacodelocal function converter(oldname, newname, resolution) if not resolution or resolution == "" then resolution = 50 end os.execute(string.format( 'convert -density %ix%i "%s" "%s"', resolution, resolution, oldname, newname) )end -- Set the PDF and default TIFF converters to the above function.figures.converters.tif.pdf = converterfigures.converters.tif.default = converter\stopluacode \starttext % Substitute any TIFF here. \externalfigure[cow.tiff]\stoptext</pre> See also: https://source.contextgarden.net/tex/context/base/mkiv/grph-inc.lua == Interaction == By default, the interactive elements of the included PDF file are discarded. To enable the interactive elements of the included PDF file, use<texcode>\externalfigure[filename.pdf][interaction=yes]</texcode> == Image Directory == By default, ConTeXt searches an image in the current directory, the parent directory, and the grand-parent directory. To search for images in other directories, for example a <tt>./images</tt> subdirectory and <tt>/home/user/images</tt>, use: <texcode>\setupexternalfigures[directory={images, /home/user/images}]</texcode> Note: always use forward slashes (`/`) in path names, regardless of operating system. The default search order is: the current directory, the parent directory, the grand-parent directory, and then the paths specified by the <tt>directory</tt> key. To restrict image search only to the paths specified by the <tt>directory</tt> key, use: <texcode>\setupexternalfigures[location=global]</texcode> To restore the default search behavior, use: <texcode>\setupexternalfigures[location={local,global}]</texcode> The ConTeXt distribution includes three sample images: <tt>cow.pdf</tt>, <tt>mill.png</tt>, and <tt>hacker.jpg</tt>, that are useful when creating minimum working examples to illustrate a bug on the mailing list. These images are locating in the <tt>TEXMF</tt> directory. To add the <tt>TEXMF</tt> directory to the image search path, use: <texcode>\setupexternalfigures[location={local,global,default}]</texcode> The above alternative adds the ''entire'' <tt>TEXMF</tt> directory to the search path, ''including the'' <tt>doc/</tt> ''directory!'' Therefore, one needs to be extremely careful when using this option. In fact, I would advise not using <tt>location=default</tt> except for illustrative minimal working examples. == Remote Images == The {{cmd|externalfigure}} command supports reading files from web servers, for example: <texcode>\externalfigure[http://tug.org/images/logobw.jpg]</texcode>When a document containing a remote file is compiled for the first time, the remote file is downloaded from the server and stored in the LuaTeX cache directory. This cached file is used during subsequent runs. Normally, the remote image is downloaded again if the image in the cache is older than 1~day. To change this threshold to, for example, 2<sub>minutes (120</sub>seconds), either add <texcode>\enabledirectives[schemes.threshold=120]</texcode> in the ConTeXt file, or compile the ConTeXt file using the command <pre>context --directives=schemes.threshold=120 <em>filename</em></pre>The variable <tt>schemes.threshold</tt> is global, so changing its value affects all other macros like <tt>\input</tt>, <tt>\usemodule</tt>, <tt>\component</tt>, etc. that load remote files. === HTTP Proxy === To use an http proxy for fetching images, the http variable ([http://w3.impa.br/~diego/software/luasocket/http.html LuaSocket]) has to be set up as follows:
<texcode>
\externalfigure[mypic]ctxlua{http = require("socket.http"); http.PROXY = "http://proxy.example.com:3128"}
</texcode>
<texcode>
\externalfigure[file or reference name][keyctxlua{http =value, key=value, require("socket.http"); http..]PROXY = nil}
</texcode>
== Where ConTeXt finds your picture files Inline Images ==
<texcode>
\setupexternalfigures[directorystartluacodelocal cow ={mime.unb64("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")figures.setmemstream("inline",cow)context.externalfigure({"memstream:///picturesinline"}])\stopluacode
</texcode>
=Transformations = Referenced Pictures == Image Scaling == To scale an image use the <tt>scale</tt> key: <tt>scale=1000</tt> corresponds to the original dimensions of the image, <tt>scale=500</tt> scales the image to 50% of the original size, <tt>scale=1500</tt> scales the images to 150% of the original size, and so on. For example: <texcode>\externalfigure[logo.pdf][scale=500]</texcode> Use <tt>\setupexternalfigures</tt> to set the scale of all images. For example, to scale all images to be twice their original size, use: <texcode>\setupexternalfigures[scale=2000]</texcode> If either <tt>width</tt> or <tt>height</tt> is specified, then the <tt>scale</tt> key has no effect. In addition, the <tt>xscale</tt> and <tt>yscale</tt> keys scale the image in only one dimension. For example: <texcode>\externalfigure[logo.pdf][xscale=500]\externalfigure[logo.pdf][yscale=500]</texcode> Scaling changes the visible size of a picture, but not the data or file size. If you want to reduce your file size by decreasing image resolution, see [[Downsampling]]. == Image Dimension Restriction == ConTeXt can limit included images to particular dimensions. For example, to ensure that an included image is not more than <tt>0.2\textwidth</tt>: <texcode>\externalfigure[logo.pdf][maxwidth=0.2\textwidth]</texcode> If <tt>maxwidth</tt> is specified and the width of the image is less than <tt>maxwidth</tt>, then the image is not scaled; if the width of the image is greater than <tt>maxwidth</tt>, then the width is restricted to <tt>maxwidth</tt> and the height is scaled appropriately to maintain the original aspect ratio. The option <tt>maxheight</tt> is analogous to <tt>maxwidth</tt>, for checking the height of the image. For example, to ensure that figures do not overflow the text~area, one may set: <texcode>\setupexternalfigures [maxwidth=\textwidth, maxheight=0.8\textheight]</texcode> == Image Rotation == Rotate included images by 90°, 180°, or 270° using the <tt>orientation</tt> key. For example: <texcode>\externalfigure[logo.pdf][orientation=90]</texcode> To rotate by an arbitrary angle, use the {{cmd|rotate}} command. For example: <texcode>\rotate[rotation=45]{\externalfigure[logo.pdf]}</texcode> == Image Mirroring == To mirror (flip) an image, use the generic {{cmd|mirror}} command. For example, to mirror horizontally: <texcode>\mirror{\externalfigure[logo.pdf]}</texcode> To mirror vertically, first rotate the image by 180° and then mirror it: <texcode>\mirror{\externalfigure[logo.pdf][orientation=180]}</texcode> == Image Clipping == Clip an image using the generic {{cmd|clip}} command. For example, to clip the original image to a <tt>1cm x 2cm</tt> rectangle at an offset of <tt>(3mm,5mm)</tt> from the top left corner: <texcode>\clip[width=1cm, height=2cm, hoffset=3mm, voffset=5mm] {\externalfigure[logo.pdf]}</texcode> As another example, this cuts the image into a <tt>3x3</tt> pieces and then outputs the <tt>(2,2)</tt> piece: <texcode>\clip[nx=3,ny=3,x=2,y=2] {\externalfigure[logo.pdf]}</texcode> In PDF files, it is possible to specify different size information in PDF headers MediaBox, TrimBox, CropBox, and ArtBox. To clip to one of these sizes, use <texcode>\externalfigure[logo.pdf][size=art]</texcode> Other options are: `none` (detault), `media` for MediaBox, `crop` for CropBox, `trim` for TrimBox, and `art` for ArtBox. = Troubleshooting = This section describes various tips for discovering problems with embedded images. == Visualize Bounding Box == If, for instance, the image is taking more space than expected, it can be useful to visualize the bounding box of the image. To do this: <texcode>\externalfigure[logo.pdf][frame=on]</texcode> ConTeXt includes a Perl script <tt>pdftrimwhite</tt> that removes extra white space at the borders of a PDF file. To run this script: <pre>mtxrun --script pdftrimwhite [flags] input output</pre> The most important flag is <tt>--offset=dimen</tt>, which keeps some extra space around the trimmed image. Similar functionality is provided by another Perl script, <tt>pdfcrop</tt>, that is included in most TeX distributions. == Diagnostic Tracking == To get diagnostic information about image inclusion, enable the tracker <tt>graphics.locating</tt> by editing the ConTeXt file and adding: <texcode>\enabletrackers[graphics.locating]</texcode> Alternatively, compile the ConTeXt file using: <texcode>context --trackers=graphics.locating filename</texcode> The tracker writes diagnostics to the console. Suppose we use <tt>\externalfigure[somefile.pdf]</tt> and ConTeXt finds the file in the current search path; then the following information is printed on the console: <pre>graphics > inclusion > locations: local,globalgraphics > inclusion > path list: . .. ../..graphics > inclusion > strategy: forced format pdfgraphics > inclusion > found: somefile.pdf -> somefile.pdfgraphics > inclusion > format natively supported by backend: pdf</pre>If the file <tt>somefile.pdf</tt> is not found in the current search path, then the following information is printed on the console (even if the <tt>graphics.locating</tt> tracker is not set): <pre>graphics > inclusion > strategy: forced format pdfgraphics > inclusion > not found: somefile.pdfgraphics > inclusion > not found: ./somefile.pdfgraphics > inclusion > not found: ../somefile.pdfgraphics > inclusion > not found: ../../somefile.pdfgraphics > inclusion > not found: images/somefile.pdfgraphics > inclusion > not found: /home/user/images/somefile.pdfgraphics > inclusion > format not supported: </pre>and a placeholder gray box is put in the output: <context> </context> Sometimes, one would rather use a placeholder image for an image that is yet to be made. In such cases, load the MP library <tt>dum</tt> via: <texcode>\useMPlibrary[dum]</texcode> Then, whenever an image file is not found in the current search path, a random MetaPost image is shown in the output. <context> </context> == Leading Paragraph == Using {{cmd|externalfigure}}<tt>[...]</tt> at the beginning of a paragraph results in a line break after the image. This is because {{cmd|externalfigure}} is a {{cmd|vbox}} and when a {{cmd|vbox}} is encountered at (what appears to be) the beginning of a paragraph, it remains in vertical mode. To prevent this, add {{cmd|dontleavehmode}} before {{cmd|externalfigure}}, like this: <texcode>\dontleavehmode\externalfigure[...] ... first line ...</texcode> = Multiple Image Settings =
Suppose your document contains many side-by-side images, and you want all of these images to be of the same size. In addition, you want to control the size of all images by changing only one setup. To do this, you can use the {{cmd|defineexternalfigure}} macro, which defines a named collection of image settings. For example, to define a collection where the image width is <texcodett>\useexternalfigure[reference name][file name][options]3cm</texcodett>, use:
== Flow text around a picture Image Labels ==
defines an image label <texcodett>\setupexternalfigures[location={local,default}]\starthangaround{\externalfigure[cow]}\input tufte\stophangaroundmylogo</texcodett>that maps to the image file <contexttt>\setupexternalfigures[location={local,default}]logo.pdf</tt> and sets its width to <tt>2cm</tt>. This image label may be used as a normal image filename:
== Pictures as [[Floating Objects]] ==
Floats are numbered and placed by ConTeXt, with a configurable (and they can get a optional) caption.
<texcode>
You get ''no'' caption with <tt>none</tt>.
You get a table of figures with {{cmd|showexternalfigures}}<cmdcode>showexternalfigures[alternative=a]</cmdcode>. Alternatives (styles) a, b and c are predefined.
The second brackets of <{{cmd>|placefigure</cmd> }} can keep contain any command, e.g. <{{cmd>|getbuffer</cmd>}}.
You find more about floats ([[Floating Objects]]) in the manual.
= Movies =
<texcode>
\externalfigure[demo.mov][label=demo,width=4cm,height=4cm,preview=yes]
</texcode>
<tt>preview=yes</tt> shows the first image as preview.
You find more about interactive Elements in [http://www.pragma-ade.com/general/manuals/mwidget-s.pdf mwidget-s.pdf]
Unfortunately, people who are fond of Linux cannot embed movies because the linux release of acroread doesn't support that. An alternative solution consists in launching your prefered player (MPlayer) from acroread:
<texcode>
\defineprogram[dummy.mpeg][dummy.mpeg.sh]
</nowiki></pre>
= See also Also = * [[Animation]].* [[Example photo page layout]]* [[Graphical_text_manipulation|scaling, rotating, mirroring, clipping]]
[[Category:Graphics]]
{{Getting started navbox}}
