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Tux Paint PNG Documentation </title>
<meta http-equiv="Content-Type"
content="text/html; charset=utf-8">
<style>
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</head>
<body bgcolor="#FFFFFF"
text="#000000"
link="#0000FF"
vlink="#FF0000"
alink="#FF00FF">
<center>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
PNG Documentation </h1>
<section class="outer">
<header>
<center>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
PNG Documentation </h1>
<p>
Copyright &copy; 2007-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
<p>
March 31, 2022 </p>
</center>
</header>
</section>
<section class="indent">
<header>
<h1>About PNGs</h1>
</header>
<p>
Copyright &copy; 2007-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
<p>
January 20, 2022 </p>
</center>
<hr>
<h2>About PNGs</h2>
<p>
PNG is the Portable Network Graphic format. It is an open standard, not burdened by patents (like GIFs). It is a highly compressed format (though not "lossy" like JPEGs - lossiness allows files to be much smaller, but introduces 'mistakes' in the image when saved), and supports 24-bit color (16.7 million colors) as well as a full "alpha channel" - that is, each pixel can have a varying degree of transparency. </p>
<p>
For more information, visit: <a href="http://www.libpng.org/">http://www.libpng.org/</a> </p>
<p>
These features (openness, losslessness, compression, transparency/alpha) make it the best choice for Tux Paint. (Tux Paint's support for the PNG format comes from the Open Source SDL_Image library, which in turn gets it from the libPNG library.) </p>
<p>
Support for many colors allows photo-quality "rubber stamp" images to be used in Tux Paint, and alpha transparency allows for high-quality brushes. </p>
<h2>How To Make PNGs</h2>
PNG is the Portable Network Graphic format. It is an open standard, not burdened by patents (like GIFs). It is a highly compressed format (though not "lossy" like JPEGs - lossiness allows files to be much smaller, but introduces 'mistakes' in the image when saved), and supports 24-bit color (16.7 million colors) as well as a full "alpha channel" - that is, each pixel can have a varying degree of transparency. </p>
<p>The following is a very <em>brief</em> list of ways to create PNGs or convert existing images into PNGs.
<h3>GIMP &amp; Krita</h3>
<p>
Excellent tools with which to create PNG images for use in Tux Paint are GIMP and Krita, both high-quality Open Source interactive drawing and photo editing programs. </p>
<p>
For more information, visit: <a href="http://www.libpng.org/">http://www.libpng.org/</a> </p>
<p>
These features (openness, losslessness, compression, transparency/alpha) make it the best choice for Tux Paint. (Tux Paint's support for the PNG format comes from the Open Source SDL_Image library, which in turn gets it from the libPNG library.) </p>
<p>
Support for many colors allows photo-quality "rubber stamp" images to be used in Tux Paint, and alpha transparency allows for high-quality brushes. </p>
</section>
<p>
It is likely that one or both are already installed on your system. If not, they should be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="http://www.gimp.org/">http://www.gimp.org/</a> and <a href="http://www.krita.org/">http://www.krita.org/</a>, respectively. </p>
<h3>Command-line Tools</h3>
<h4>NetPBM</h4>
<p>
The Portable Bitmap tools (collectively known as "NetPBM") is a collection of Open Source command-line tools which convert to and from various formats, including GIF, TIFF, BMP, PNG, and many more. </p>
<p>
It is possible that it's already installed on your system. If not, they it be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="http://netpbm.sourceforge.net/">http://netpbm.sourceforge.net/</a>. </p>
<h4>cjpeg/djpeg</h4>
<p>
The "cjpeg" and "djpeg" command-line programs convert between the NetPBM Portable Any Map (PNM) format and JPEGs.
It is possible that it's already installed on your system. If not, they it be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="https://jpegclub.org/">https://jpegclub.org/</a>. </p>
<h3>Windows Users</h3>
<ul>
<li> <cite>CorelDRAW</cite>
<section class="indent">
<header>
<h2>How To Make PNGs</h2>
</header>
<p>The following is a very <em>brief</em> list of ways to create PNGs or convert existing images into PNGs.
<dl>
<dt>GIMP &amp; Krita</dt>
<dd>
<p>
Excellent tools with which to create PNG images for use in Tux Paint are GIMP and Krita, both high-quality Open Source interactive drawing and photo editing programs. </p>
<p>
It is likely that one or both are already installed on your system. If not, they should be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="http://www.gimp.org/">http://www.gimp.org/</a> and <a href="http://www.krita.org/">http://www.krita.org/</a>, respectively. </p>
</dd>
<dt>Command-line Tools</dt>
<dd>
<dl>
<dt>NetPBM</dt>
<dd>
<p>
The Portable Bitmap tools (collectively known as "NetPBM") is a collection of Open Source command-line tools which convert to and from various formats, including GIF, TIFF, BMP, PNG, and many more. </p>
<p>
It is possible that it's already installed on your system. If not, they it be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="http://netpbm.sourceforge.net/">http://netpbm.sourceforge.net/</a>. </p>
</dd>
<dt>cjpeg/djpeg</dt>
<dd>
<p>
The "cjpeg" and "djpeg" command-line programs convert between the NetPBM Portable Any Map (PNM) format and JPEGs.
It is possible that it's already installed on your system. If not, they it be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="https://jpegclub.org/">https://jpegclub.org/</a>. </p>
</dd>
</dl>
</dd>
<dt>Proprietary Software for Windows</dt>
<dd>
<ul>
<li> <cite>CorelDRAW</cite>
(Corel)
&mdash;
<a href="http://www.corel.com/">http://www.corel.com/</a>
<li> <cite>Illustrator</cite>
<li> <cite>Illustrator</cite>
(Adobe)
&mdash;
<a href="http://www.adobe.com/products/illustrator.html">http://www.adobe.com/products/illustrator.html</a>
<li> <cite>Paint Shop Pro</cite>
<li> <cite>Paint Shop Pro</cite>
(Corel)
&mdash;
<a href="https://www.paintshoppro.com/">https://www.paintshoppro.com/</a>
<li> <cite>Photoshop</cite>
<li> <cite>Photoshop</cite>
(Adobe)
&mdash;
<a href="http://www.adobe.com/products/photoshop.html">http://www.adobe.com/products/photoshop.html</a>
<li> <cite>PIXresizer</cite>
<li> <cite>PIXresizer</cite>
(Bluefive software)
&mdash;
<a href="http://bluefive.pair.com/pixresizer.htm">http://bluefive.pair.com/pixresizer.htm</a>
</ul>
<h3>Macintosh Users</h3>
<ul>
<li> <cite>CorelDRAW</cite>
</ul>
</dd>
<dt>Macintosh Users</dt>
<dd>
<ul>
<li> <cite>CorelDRAW</cite>
(Corel)
&mdash;
<a href="http://www.corel.com/">http://www.corel.com/</a>
<li> <cite>GraphicConverter</cite>
<li> <cite>GraphicConverter</cite>
(Lemke Software)
&mdash;
<a href="https://www.lemkesoft.de/mac-fotobearbeitung-mac-diashow-mac-grafikprogramm-mac-bildbetrachter/">https://www.lemkesoft.de/mac-fotobearbeitung-mac-diashow-mac-grafikprogramm-mac-bildbetrachter/</a>
<li> <cite>Illustrator</cite>
<li> <cite>Illustrator</cite>
(Adobe)
&mdash;
<a href="http://www.adobe.com/products/illustrator.html">http://www.adobe.com/products/illustrator.html</a>
<li> <cite>Photoshop</cite>
<li> <cite>Photoshop</cite>
(Adobe)
&mdash;
<a href="http://www.adobe.com/products/photoshop.html">http://www.adobe.com/products/photoshop.html</a>
</ul>
</ul>
</dd>
</dl>
</section>
</body>
</html>

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<p>
Copyright &copy; 2002-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br/>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a><br/>
<a href="https://twitter.com/TuxPaintTweets">@TuxPaintTweets on Twitter</a>
<a href="https://twitter.com/TuxPaintTweets">@TuxPaintTweets on Twitter</a><br/>
<a href="https://tuxpaint.tumblr.com/">Tux Paint on Tumblr</a>
</p>
<p>
March 1, 2022 </p>
March 18, 2022 </p>
</center>
</header>
<table border="2"
@ -113,7 +119,7 @@
<tr>
<td>
<ul>
<li><a href="#about">About Tux Paint</a></li> <li><a href="#using">Using Tux Paint</a> <ul>
<li><a href="#about">About Tux Paint</a></li> <li><a href="#using">Using Tux Paint</a> <ul>
<li><a href="#using_loading">Launching Tux Paint</a></li> <li><a href="#using_title">Title Screen</a></li> <li><a href="#using_main">Main Screen</a></li> <li><a href="#using_tools">Available Tools</a> <ul>
<li><a href="#using_tools_drawing">Drawing Tools</a> <ul>
<li><a href="#using_tools_drawing_paint">"Paint" Tool (Brush)</a></li> <li><a href="#using_tools_drawing_stamp">"Stamp" Tool (Rubber Stamps)</a></li> <li><a href="#using_tools_drawing_lines">"Lines" Tool</a></li> <li><a href="#using_tools_drawing_shapes">"Shapes" Tool</a></li> <li><a href="#using_tools_drawing_text_and_label">"Text" and "Label" Tools</a></li> <li><a href="#using_tools_drawing_fill">"Fill" Tool</a></li> <li><a href="#using_tools_drawing_magic">"Magic" Tool (Special Effects)</a></li> <li><a href="#using_tools_drawing_eraser">"Eraser" Tool</a></li> </ul>
@ -1602,6 +1608,7 @@
<li>"Microsoft" and "Windows" are registered trademarks of Microsoft Corp.</li>
<li>"Apple" and "macOS" are registered trademarks of Apple Inc.</li>
<li>"Twitter" is a registered trademark of Twitter, Inc.</li>
<li>"Tumblr" is a registered trademark of Tumblr, Inc.</li>
</ul>
</section>
</footer>

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Tux Paint Signals Documentation </title>
<meta http-equiv="Content-Type"
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<body bgcolor="#FFFFFF"
text="#000000"
link="#0000FF"
vlink="#FF0000"
alink="#FF00FF">
<center>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
Signals Documentation </h1>
<section class="outer">
<center>
<header>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
Signals Documentation </h1>
<p>
Copyright &copy; 2019-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
<p>
March 31, 2022 </p>
</header>
</center>
</section>
<section>
<p>
Copyright &copy; 2019-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
<p>
January 20, 2022 </p>
</center>
<hr>
<p>
Tux Paint responds to the following signals (which can be sent to the program's process via `<code>kill</code>` or `<code>killall</code>`, for example). </p>
<dl>
<dt>
<code>SIGTERM</code>
(also, <b><code>[Ctrl]</code></b> + <b><code>[C]</code></b> from a terminal running `<code>tuxpaint</code>`) </dt>
<dd>
<p>
Tux Paint responds as if the "Quit" button were pressed, or the desktop environment was told to close Tux Paint (e.g., by clicking a window close button, or pressing <b><code>[Alt]</code></b> + <b><code>[F4]</code></b> on most systems). </p>
<p>
From the main interface, Tux Paint will prompt whether or not you wish to quit, and (unless overridden by the auto-save option, e.g. "<code>--autosave</code>") if you'd like to save the current drawing (if unsaved), and if so, and it's a modified version of an existing drawing (unless overridden by the options to save over old images, or always save new images; e.g. "<code>--saveover</code>" and "<code>--saveovernew</code>", respectively), whether or not to overwrite the existing drawing, or save to a new file. </p>
<p>
<b>Note:</b> From other parts of the interface, the signal is currently interpreted as a request to go back (e.g., from the "New" dialog back to the main interface), as if a "Back" button in Tux Paint were clicked, or the <b><code>[Esc]</code></b> was key pressed. </p>
<p>
Example: <code>killall tuxpaint</code> </p>
</dd>
<dt>
<code>SIGUSR1</code> &amp; <code>SIGUSR2</code>
</dt>
<dd>
<p>
Tux Paint responds by setting its auto-save option (as if it had been launched with "<code>--autosave</code>"), as well as either the option to always save new images (as if launched with "<code>--saveovernew</code>") in the case of receiving a <code>SIGUSR1</code> signal, or to always save over the existing image (as if launched with "<code>--saveover</code>") in the case of receiving <code>SIGUSR2</code>. Then Tux Paint sends itself a <code>SIGTERM</code> signal, in an attempt to quit. (See above.) </p>
<p>
So, from the main interface, Tux Paint should quit almost immediately, with no questions asked. </p>
<p>
<b>Note:</b> From other parts of the interface, unfortunately, Tux Paint will go back one level in the interface. Therefore, at this time, it may be necessary to send this signal to Tux Paint a few times, for it to quit completely. </p>
<p>
Example: <code>killall -s SIGUSR1 tuxpaint</code> </p>
</dd>
</dl>
Tux Paint responds to the following signals (which can be sent to the program's process via `<code>kill</code>` or `<code>killall</code>`, for example). </p>
<dl>
<dt>
<code>SIGTERM</code>
(also, <b><code>[Ctrl]</code></b> + <b><code>[C]</code></b> from a terminal running `<code>tuxpaint</code>`) </dt>
<dd>
<p>
Tux Paint responds as if the "Quit" button were pressed, or the desktop environment was told to close Tux Paint (e.g., by clicking a window close button, or pressing <b><code>[Alt]</code></b> + <b><code>[F4]</code></b> on most systems). </p>
<p>
From the main interface, Tux Paint will prompt whether or not you wish to quit, and (unless overridden by the auto-save option, e.g. "<code>--autosave</code>") if you'd like to save the current drawing (if unsaved), and if so, and it's a modified version of an existing drawing (unless overridden by the options to save over old images, or always save new images; e.g. "<code>--saveover</code>" and "<code>--saveovernew</code>", respectively), whether or not to overwrite the existing drawing, or save to a new file. </p>
<p>
Example: <code>killall tuxpaint</code> </p>
<p class="note">
<span title="Information">&#128161;</span> <strong>Note:</strong> From other parts of the interface, the signal is currently interpreted as a request to go back (e.g., from the "New" dialog back to the main interface), as if a "Back" button in Tux Paint were clicked, or the <b><code>[Esc]</code></b> was key pressed. </p>
</dd>
<dt>
<code>SIGUSR1</code> &amp; <code>SIGUSR2</code>
</dt>
<dd>
<p>
Tux Paint responds by setting its auto-save option (as if it had been launched with "<code>--autosave</code>"), as well as either the option to always save new images (as if launched with "<code>--saveovernew</code>") in the case of receiving a <code>SIGUSR1</code> signal, or to always save over the existing image (as if launched with "<code>--saveover</code>") in the case of receiving <code>SIGUSR2</code>. Then Tux Paint sends itself a <code>SIGTERM</code> signal, in an attempt to quit. (See above.) </p>
<p>
So, from the main interface, Tux Paint should quit almost immediately, with no questions asked. </p>
<p>
Example: <code>killall -s SIGUSR1 tuxpaint</code> </p>
<p class="note">
<span title="Information">&#128161;</span> <strong>Note:</strong> From other parts of the interface, unfortunately, Tux Paint will go back one level in the interface. Therefore, at this time, it may be necessary to send this signal to Tux Paint a few times, for it to quit completely. </p>
</dd>
</dl>
</section>
</body>
</html>

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Tux Paint SVG Documentation </title>
<meta http-equiv="Content-Type"
content="text/html; charset=utf-8">
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<center>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
SVG Documentation </h1>
<!-- Title -->
<section class="outer">
<header>
<center>
<h1>
<img src="../../html/images/tuxpaint-title.png"
width="205"
height="210"
alt="Tux Paint"><br>
version 0.9.28<br/>
SVG Documentation </h1>
<p>
Copyright &copy; 2007-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
<p>
January 20, 2022 </p>
</center>
</header>
</section>
<section class="indent">
<header>
<h1>About SVGs</h1>
</header>
<p>
Copyright &copy; 2007-2022 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
<a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
</p>
SVG (Scalable Vector Graphics) is an open standard used to describe two-dimensional vector graphics. It is great for diagrams and shapes, while PNGs are better for photographs. SVG files are a bit like instructions on how to make an image. This means that they can be resized without looking pixelated or blocky. </p>
<p>
For more information, visit: <a href="https://www.w3.org/Graphics/SVG/">https://www.w3.org/Graphics/SVG/</a> </p>
</section>
<section class="indent">
<header>
<h1>How to make SVGs</h1>
</header>
<p>
January 20, 2022 </p>
</center>
An excellent tool with which to create SVG images for use in Tux Paint is Inkscape, a high-quality Open Source interactive drawing program available for Windows, macOS, and Linux. There are also other applications that can produce SVGs, both free/open source, and commerical/proprietary. </p>
<hr>
<h2>About SVGs</h2>
<p>
SVG (Scalable Vector Graphics) is an open standard used to describe two-dimensional vector graphics. It is great for diagrams and shapes, while PNGs are better for photographs. SVG files are a bit like instructions on how to make an image. This means that they can be resized without looking pixelated or blocky. </p>
<p>
For more information, visit: <a href="https://www.w3.org/Graphics/SVG/">https://www.w3.org/Graphics/SVG/</a> </p>
<h2>How to make SVGs</h2>
<p>
An excellent tool with which to create SVG images for use in Tux Paint is Inkscape, a high-quality Open Source interactive drawing program. </p>
<p>
It is likely that is already installed on your system. If not, it should be readily available from your Linux distribution's software repository. If not, or to learn more, visit <a href="http://www.inkscape.org/">http://www.inkscape.org/</a>, respectively. </p>
<h2>Mac and Windows users</h2>
<ul>
<li> <cite>CorelDRAW</cite>
(Corel)
&mdash;
<a href="http://www.corel.com/">http://www.corel.com/</a>
<li> <cite>Illustrator</cite>
(Adobe)
&mdash;
<dl>
<dt><strong>Open Source</strong></dt>
<dd>
<ul>
<li> <cite>Inkscape</cite>
&mdash;
<a href="http://www.inkscape.org/">http://www.inkscape.org/</a>
</li>
<li> <cite>Karbon</cite>
&mdash;
<a href="https://calligra.org/karbon/">https://calligra.org/karbon/</a>
</li>
</ul>
</dd>
<dt><strong>Proprietary</strong></dt>
<dd>
<ul>
<li> <cite>CorelDRAW</cite>
(Corel)
&mdash;
<a href="https://www.coreldraw.com/en/">https://www.coreldraw.com/en/</a>
</li>
<li> <cite>Illustrator</cite>
(Adobe)
&mdash;
<a href="http://www.adobe.com/products/illustrator.html">http://www.adobe.com/products/illustrator.html</a>
</ul>
</li>
<li> <cite>Boxy SVG</cite>
&mdash;
<a href="https://boxy-svg.com/">https://boxy-svg.com/</a>
</li>
<li> <cite>Sketch</cite>
(Sketch B.V.)
&mdash;
<a href="https://boxy-svg.com/">https://boxy-svg.com/</a>
</li>
</ul>
</dl>
</section>
</body>
</html>