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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Floyd-Steinberg Dithering</title>
    <style>
        @font-face {
            font-family: 'ChicagoFLF';
            src: url('https://eli.li/_assets/bin/inknswitch/ChicagoFLF.ttf') format('truetype');
            font-weight: normal;
            font-style: normal;
        }
        body {
            display: block;
            padding: 0.25em 0.5em;
            background-color: beige;
            font-family: sans-serif;
            font-size: large;
        }
        h1,h2 {
            font-family: 'ChicagoFLF', sans-serif;
            margin: 0;
        }
        label {
            font-family: 'ChicagoFLF', sans-serif;
            font-size: 1.25em;
        }
        canvas, input, button {
            max-width: calc(100% - 4em);
            padding: 0;
            border: 1px solid rgb(133, 133, 133);
            box-sizing: border-box;
        }
        button, input[type="file"] {
            border-radius: 7px;
            cursor: pointer;
            padding: 0.5em 1em;
            font-size: 1.25em;
        }
    </style>
</head>
<body>
    <h1>Dither me this</h1>
    <canvas id="canvas"></canvas>
    <br>
    <br>
    <h2>Step 1.</h2>
    <label for="upload">Upload an image</label>
    <br>
    <input type="file" id="upload" accept="image/*">
    <br>
    <br>
    <h2>Step 2.</h2>
    <label for="download">Download the image</label>
    <br>
    <button id="download">Download Image</button>
    <p>Note that the image processing all happens in your browser, nothing is ever uploaded to anything other than your browser.</p>
    <script src="dither.js"></script>
</body>
</html>
sp;the&nbsp;License,&nbsp;or<br> #&nbsp;(at&nbsp;your&nbsp;option)&nbsp;any&nbsp;later&nbsp;version.<br> #<br> #&nbsp;This&nbsp;program&nbsp;is&nbsp;distributed&nbsp;in&nbsp;the&nbsp;hope&nbsp;that&nbsp;it&nbsp;will&nbsp;be&nbsp;useful,<br> #&nbsp;but&nbsp;WITHOUT&nbsp;ANY&nbsp;WARRANTY;&nbsp;without&nbsp;even&nbsp;the&nbsp;implied&nbsp;warranty&nbsp;of<br> #&nbsp;MERCHANTABILITY&nbsp;or&nbsp;FITNESS&nbsp;FOR&nbsp;A&nbsp;PARTICULAR&nbsp;PURPOSE.&nbsp;&nbsp;See&nbsp;the<br> #&nbsp;GNU&nbsp;General&nbsp;Public&nbsp;License&nbsp;for&nbsp;more&nbsp;details.<br> #<br> #&nbsp;You&nbsp;should&nbsp;have&nbsp;received&nbsp;a&nbsp;copy&nbsp;of&nbsp;the&nbsp;GNU&nbsp;General&nbsp;Public&nbsp;License<br> #&nbsp;along&nbsp;with&nbsp;this&nbsp;program.&nbsp;&nbsp;If&nbsp;not,&nbsp;see&nbsp;&lt;<a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>&gt;.</tt></p> <p> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> <tr bgcolor="#aa55cc"> <td colspan=3 valign=bottom>&nbsp;<br> <font color="#ffffff" face="helvetica, arial"><big><strong>Modules</strong></big></font></td></tr> <tr><td bgcolor="#aa55cc"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td> <td width="100%"><table width="100%" summary="list"><tr><td width="25%" valign=top><a href="_curses.html">_curses</a><br> </td><td width="25%" valign=top><a href="curses.html">curses</a><br> </td><td width="25%" valign=top><a href="os.html">os</a><br> </td><td width="25%" valign=top><a href="sys.html">sys</a><br> </td></tr></table></td></tr></table><p> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> <tr bgcolor="#ee77aa"> <td colspan=3 valign=bottom>&nbsp;<br> <font color="#ffffff" face="helvetica, arial"><big><strong>Classes</strong></big></font></td></tr> <tr><td bgcolor="#ee77aa"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td> <td width="100%"><dl> <dt><font face="helvetica, arial"><a href="ranger.gui.displayable.html#DisplayableContainer">ranger.gui.displayable.DisplayableContainer</a>(<a href="ranger.gui.displayable.html#Displayable">ranger.gui.displayable.Displayable</a>) </font></dt><dd> <dl> <dt><font face="helvetica, arial"><a href="ranger.gui.ui.html#UI">UI</a> </font></dt></dl> </dd> </dl> <p> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> <tr bgcolor="#ffc8d8"> <td colspan=3 valign=bottom>&nbsp;<br> <font color="#000000" face="helvetica, arial"><a name="UI">class <strong>UI</strong></a>(<a href="ranger.gui.displayable.html#DisplayableContainer">ranger.gui.displayable.DisplayableContainer</a>)</font></td></tr> <tr><td bgcolor="#ffc8d8"><tt>&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td> <td width="100%"><dl><dt>Method resolution order:</dt> <dd><a href="ranger.gui.ui.html#UI">UI</a></dd> <dd><a href="ranger.gui.displayable.html#DisplayableContainer">ranger.gui.displayable.DisplayableContainer</a></dd> <dd><a href="ranger.gui.displayable.html#Displayable">ranger.gui.displayable.Displayable</a></dd> <dd><a href="ranger.shared.html#EnvironmentAware">ranger.shared.EnvironmentAware</a></dd> <dd><a href="ranger.shared.html#FileManagerAware">ranger.shared.FileManagerAware</a></dd> <dd><a href="ranger.shared.html#Awareness">ranger.shared.Awareness</a></dd> <dd><a href="ranger.gui.curses_shortcuts.html#CursesShortcuts">ranger.gui.curses_shortcuts.CursesShortcuts</a></dd> <dd><a href="ranger.shared.settings.html#SettingsAware">ranger.shared.settings.SettingsAware</a></dd> <dd><a href="__builtin__.html#object">__builtin__.object</a></dd> </dl> <hr> Methods defined here:<br> <dl><dt><a name="UI-__init__"><strong>__init__</strong></a>(self, env<font color="#909090">=None</font>, fm<font color="#909090">=None</font>)</dt></dl> <dl><dt><a name="UI-destroy"><strong>destroy</strong></a>(self)</dt><dd><tt>Destroy&nbsp;all&nbsp;widgets&nbsp;and&nbsp;turn&nbsp;off&nbsp;curses</tt></dd></dl> <dl><dt><a name="UI-draw"><strong>draw</strong></a>(self)</dt><dd><tt>Draw&nbsp;all&nbsp;objects&nbsp;in&nbsp;the&nbsp;container</tt></dd></dl> <dl><dt><a name="UI-finalize"><strong>finalize</strong></a>(self)</dt><dd><tt>Finalize&nbsp;every&nbsp;object&nbsp;in&nbsp;container&nbsp;and&nbsp;refresh&nbsp;the&nbsp;window</tt></dd></dl> <dl><dt><a name="UI-handle_input"><strong>handle_input</strong></a>(self)</dt></dl> <dl><dt><a name="UI-handle_key"><strong>handle_key</strong></a>(self, key)</dt><dd><tt>Handles&nbsp;key&nbsp;input</tt></dd></dl> <dl><dt><a name="UI-handle_keys"><strong>handle_keys</strong></a>(self, *keys)</dt></dl> <dl><dt><a name="UI-handle_mouse"><strong>handle_mouse</strong></a>(self)</dt><dd><tt>Handles&nbsp;mouse&nbsp;input</tt></dd></dl> <dl><dt><a name="UI-initialize"><strong>initialize</strong></a>(self)</dt><dd><tt>initialize&nbsp;curses,&nbsp;then&nbsp;call&nbsp;setup&nbsp;(at&nbsp;the&nbsp;first&nbsp;time)&nbsp;and&nbsp;resize.</tt></dd></dl> <dl><dt><a name="UI-redraw"><strong>redraw</strong></a>(self)</dt><dd><tt>Redraw&nbsp;all&nbsp;widgets</tt></dd></dl> <dl><dt><a name="UI-redraw_window"><strong>redraw_window</strong></a>(self)</dt><dd><tt>Redraw&nbsp;the&nbsp;window.&nbsp;This&nbsp;only&nbsp;calls&nbsp;self.<strong>win</strong>.redrawwin().</tt></dd></dl> <dl><dt><a name="UI-set_load_mode"><strong>set_load_mode</strong></a>(self, boolean)</dt></dl> <dl><dt><a name="UI-setup"><strong>setup</strong></a>(self)</dt><dd><tt>Called&nbsp;after&nbsp;an&nbsp;<a href="#UI-initialize">initialize</a>()&nbsp;call.<br> Override&nbsp;this!</tt></dd></dl> <dl><dt><a name="UI-suspend"><strong>suspend</strong></a>(self)</dt><dd><tt>Turn&nbsp;off&nbsp;curses</tt></dd></dl> <dl><dt><a name="UI-update_size"><strong>update_size</strong></a>(self)</dt><dd><tt>Update&nbsp;self.<strong>env</strong>.termsize.<br> Extend&nbsp;this&nbsp;method&nbsp;to&nbsp;resize&nbsp;all&nbsp;widgets!</tt></dd></dl> <hr> Data and other attributes defined here:<br> <dl><dt><strong>is_set_up</strong> = False</dl> <dl><dt><strong>load_mode</strong> = False</dl> <hr> Methods inherited from <a href="ranger.gui.displayable.html#DisplayableContainer">ranger.gui.displayable.DisplayableContainer</a>:<br> <dl><dt><a name="UI-add_child"><strong>add_child</strong></a>(self, obj)</dt><dd><tt>Add&nbsp;the&nbsp;objects&nbsp;to&nbsp;the&nbsp;container.</tt></dd></dl> <dl><dt><a name="UI-click"><strong>click</strong></a>(self, event)</dt><dd><tt>Recursively&nbsp;called&nbsp;on&nbsp;objects&nbsp;in&nbsp;container</tt></dd></dl> <dl><dt><a name="UI-poke"><strong>poke</strong></a>(self)</dt><dd><tt>Recursively&nbsp;called&nbsp;on&nbsp;objects&nbsp;in&nbsp;container</tt></dd></dl> <dl><dt><a name="UI-press"><strong>press</strong></a>(self, key)</dt><dd><tt>Recursively&nbsp;called&nbsp;on&nbsp;objects&nbsp;in&nbsp;container</tt></dd></dl> <dl><dt><a name="UI-remove_child"><strong>remove_child</strong></a>(self, obj)</dt><dd><tt>Remove&nbsp;the&nbsp;object&nbsp;from&nbsp;the&nbsp;container.</tt></dd></dl> <hr> Methods inherited from <a href="ranger.gui.displayable.html#Displayable">ranger.gui.displayable.Displayable</a>:<br> <dl><dt><a name="UI-__bool__"><strong>__bool__</strong></a> = __nonzero__(self)</dt><dd><tt>Always&nbsp;True</tt></dd></dl> <dl><dt><a name="UI-__contains__"><strong>__contains__</strong></a>(self, item)</dt><dd><tt>Is&nbsp;item&nbsp;inside&nbsp;the&nbsp;boundaries?<br> item&nbsp;can&nbsp;be&nbsp;an&nbsp;iterable&nbsp;like&nbsp;[y,&nbsp;x]&nbsp;or&nbsp;an&nbsp;object&nbsp;with&nbsp;x&nbsp;and&nbsp;y&nbsp;methods.</tt></dd></dl> <dl><dt><a name="UI-__nonzero__"><strong>__nonzero__</strong></a>(self)</dt><dd><tt>Always&nbsp;True</tt></dd></dl> <dl><dt><a name="UI-__str__"><strong>__str__</strong></a>(self)</dt></dl> <dl><dt><a name="UI-contains_point"><strong>contains_point</strong></a>(self, y, x)</dt><dd><tt>Test&nbsp;whether&nbsp;the&nbsp;point&nbsp;(with&nbsp;absolute&nbsp;coordinates)&nbsp;lies<br> within&nbsp;the&nbsp;boundaries&nbsp;of&nbsp;this&nbsp;object.</tt></dd></dl> <dl><dt><a name="UI-resize"><strong>resize</strong></a>(self, y, x, hei<font color="#909090">=None</font>, wid<font color="#909090">=None</font>)</dt><dd><tt>Resize&nbsp;the&nbsp;widget</tt></dd></dl> <hr> Data and other attributes inherited from <a href="ranger.shared.html#EnvironmentAware">ranger.shared.EnvironmentAware</a>:<br> <dl><dt><strong>env</strong> = None</dl> <hr> Data and other attributes inherited from <a href="ranger.shared.html#FileManagerAware">ranger.shared.FileManagerAware</a>:<br> <dl><dt><strong>fm</strong> = None</dl> <hr> Data descriptors inherited from <a href="ranger.shared.html#Awareness">ranger.shared.Awareness</a>:<br> <dl><dt><strong>__dict__</strong></dt> <dd><tt>dictionary&nbsp;for&nbsp;instance&nbsp;variables&nbsp;(if&nbsp;defined)</tt></dd> </dl> <dl><dt><strong>__weakref__</strong></dt> <dd><tt>list&nbsp;of&nbsp;weak&nbsp;references&nbsp;to&nbsp;the&nbsp;object&nbsp;(if&nbsp;defined)</tt></dd> </dl> <hr> Methods inherited from <a href="ranger.gui.curses_shortcuts.html#CursesShortcuts">ranger.gui.curses_shortcuts.CursesShortcuts</a>:<br> <dl><dt><a name="UI-addnstr"><strong>addnstr</strong></a>(self, *args)</dt></dl> <dl><dt><a name="UI-addstr"><strong>addstr</strong></a>(self, *args)</dt></dl> <dl><dt><a name="UI-color"><strong>color</strong></a>(self, *keys)</dt><dd><tt>Change&nbsp;the&nbsp;colors&nbsp;from&nbsp;now&nbsp;on.</tt></dd></dl> <dl><dt><a name="UI-color_at"><strong>color_at</strong></a>(self, y, x, wid, *keys)</dt><dd><tt>Change&nbsp;the&nbsp;colors&nbsp;at&nbsp;the&nbsp;specified&nbsp;position</tt></dd></dl> <dl><dt><a name="UI-color_reset"><strong>color_reset</strong></a>(self)</dt><dd><tt>Change&nbsp;the&nbsp;colors&nbsp;to&nbsp;the&nbsp;default&nbsp;colors</tt></dd></dl> <hr> Data and other attributes inherited from <a href="ranger.shared.settings.html#SettingsAware">ranger.shared.settings.SettingsAware</a>:<br> <dl><dt><strong>settings</strong> = {}</dl> </td></tr></table></td></tr></table><p> <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> <tr bgcolor="#55aa55"> <td colspan=3 valign=bottom>&nbsp;<br> <font color="#ffffff" face="helvetica, arial"><big><strong>Data</strong></big></font></td></tr> <tr><td bgcolor="#55aa55"><tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</tt></td><td>&nbsp;</td> <td width="100%"><strong>MOUSEMASK</strong> = 268435455<br> <strong>TERMINALS_WITH_TITLE</strong> = ('xterm', 'xterm-256color', 'rxvt', 'rxvt-256color', 'rxvt-unicode', 'aterm', 'Eterm', 'screen', 'screen-256color')</td></tr></table> </body></html>