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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>2 Logos</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">▼</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Images</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="Icons.html" class="tocviewlink" data-pltdoc="x">Icons</a></td></tr><tr><td align="right">2 </td><td><a href="" class="tocviewselflink" data-pltdoc="x">Logos</a></td></tr><tr><td align="right">3 </td><td><a href="Embedding_Bitmaps_in_Compiled_Files.html" class="tocviewlink" data-pltdoc="x">Embedding Bitmaps in Compiled Files</a></td></tr><tr><td align="right">4 </td><td><a href="flomap_title.html" class="tocviewlink" data-pltdoc="x">Floating-<wbr></wbr>Point Bitmaps</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._plt-logo%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">plt-<wbr></wbr>logo</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._planet-logo%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">planet-<wbr></wbr>logo</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._stepper-logo%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">stepper-<wbr></wbr>logo</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._macro-stepper-logo%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">macro-<wbr></wbr>stepper-<wbr></wbr>logo</span></span></a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.7</span></div><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.7", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">top</a></span><span class="navright"> <a href="Icons.html" title="backward to "1 Icons"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Images"" data-pltdoc="x">up</a> <a href="Embedding_Bitmaps_in_Compiled_Files.html" title="forward to "3 Embedding Bitmaps in Compiled Files"" data-pltdoc="x">next →</a></span> </div><h3 x-source-module="(lib "images/scribblings/images.scrbl")" x-source-pkg="images-doc" x-part-tag=""Logos"">2<tt> </tt><a name="(part._.Logos)"></a><a name="(mod-path._images/logos)"></a>Logos</h3><div class="SAuthorListBox"><span class="SAuthorList"><p class="author">Neil Toronto <<a href="mailto:neil.toronto@gmail.com">neil.toronto@gmail.com</a>></p></span></div><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">images/logos</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">images-lib</span></span></td></tr></table></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._images/logos..rkt)._plt-logo))"></a><span title="Provided from: images/logos | Package: images-lib"><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._plt-logo%29%29" class="RktValDef RktValLink" data-pltdoc="x">plt-logo</a></span></span></td><td valign="top"><span class="hspace"> </span>[</td><td valign="top"><span class="RktPn">#:height</span><span class="hspace"> </span><span class="RktVar">height</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">#:backing-scale</span><span class="hspace"> </span><span class="RktVar">backing-scale</span>]<span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">→</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">bitmap%</span><span class="RktPn">)</span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">height</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>=/c</span><span class="hspace"> </span><span class="RktVal">0</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">256</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">backing-scale</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>/c</span><span class="hspace"> </span><span class="RktVal">0.0</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">=</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">default-icon-backing-scale</span><span class="RktPn">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Returns the PLT logo, rendered in tinted glass and azure metal by the ray tracer that renders icons.
</div><div class="SIntrapara"><p><div class="SIntrapara">Example:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._plt-logo%29%29" class="RktValLink" data-pltdoc="x">plt-logo</a></span><span class="RktPn">)</span></td></tr><tr><td><p><img src="pict_107.png" alt="image" width="256.0" height="256.0"/></p></td></tr></table></blockquote></div></p></div><div class="SIntrapara">The default height is the size used for DrRacket splash screen.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._images/logos..rkt)._planet-logo))"></a><span title="Provided from: images/logos | Package: images-lib"><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._planet-logo%29%29" class="RktValDef RktValLink" data-pltdoc="x">planet-logo</a></span></span></td><td valign="top"><span class="hspace"> </span>[</td><td valign="top"><span class="RktPn">#:height</span><span class="hspace"> </span><span class="RktVar">height</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">#:backing-scale</span><span class="hspace"> </span><span class="RktVar">backing-scale</span>]<span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">→</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">bitmap%</span><span class="RktPn">)</span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">height</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>=/c</span><span class="hspace"> </span><span class="RktVal">0</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">96</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">backing-scale</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>/c</span><span class="hspace"> </span><span class="RktVal">0.0</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">=</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">default-icon-backing-scale</span><span class="RktPn">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Returns an unofficial PLaneT logo. This is used as the PLaneT icon when DrRacket downloads PLaneT packages.
</div><div class="SIntrapara"><p><div class="SIntrapara">Examples:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._planet-logo%29%29" class="RktValLink" data-pltdoc="x">planet-logo</a></span><span class="RktPn">)</span></td></tr><tr><td><p><img src="pict_108.png" alt="image" width="96.0" height="96.0"/></p></td></tr><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._planet-logo%29%29" class="RktValLink" data-pltdoc="x">planet-logo</a></span><span class="hspace"> </span><span class="RktPn">#:height</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">default-icon-height</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><p><img src="pict_109.png" alt="image" width="24.0" height="24.0"/></p></td></tr></table></blockquote></div></p></div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._images/logos..rkt)._stepper-logo))"></a><span title="Provided from: images/logos | Package: images-lib"><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._stepper-logo%29%29" class="RktValDef RktValLink" data-pltdoc="x">stepper-logo</a></span></span></td><td valign="top"><span class="hspace"> </span>[</td><td valign="top"><span class="RktPn">#:height</span><span class="hspace"> </span><span class="RktVar">height</span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">#:backing-scale</span><span class="hspace"> </span><span class="RktVar">backing-scale</span>]<span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">bitmap%</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">height</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>=/c</span><span class="hspace"> </span><span class="RktVal">0</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">96</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">backing-scale</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>/c</span><span class="hspace"> </span><span class="RktVal">0.0</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">=</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">default-icon-backing-scale</span><span class="RktPn">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Returns the algebraic stepper logo.
</div><div class="SIntrapara"><p><div class="SIntrapara">Example:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._stepper-logo%29%29" class="RktValLink" data-pltdoc="x">stepper-logo</a></span><span class="RktPn">)</span></td></tr><tr><td><p><img src="pict_110.png" alt="image" width="96.0" height="96.0"/></p></td></tr></table></blockquote></div></p></div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._images/logos..rkt)._macro-stepper-logo))"></a><span title="Provided from: images/logos | Package: images-lib"><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._macro-stepper-logo%29%29" class="RktValDef RktValLink" data-pltdoc="x">macro-stepper-logo</a></span></span></td><td valign="top"><span class="hspace"> </span>[</td><td valign="top"><span class="RktPn">#:height</span><span class="hspace"> </span><span class="RktVar">height</span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">#:backing-scale</span><span class="hspace"> </span><span class="RktVar">backing-scale</span>]<span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">bitmap%</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">height</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>=/c</span><span class="hspace"> </span><span class="RktVal">0</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">96</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">backing-scale</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">and/c</span><span class="hspace"> </span><span class="RktSym">rational?</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">>/c</span><span class="hspace"> </span><span class="RktVal">0.0</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">=</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym">default-icon-backing-scale</span><span class="RktPn">)</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Returns the macro stepper logo.
</div><div class="SIntrapara"><p><div class="SIntrapara">Example:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28def._%28%28lib._images%2Flogos..rkt%29._macro-stepper-logo%29%29" class="RktValLink" data-pltdoc="x">macro-stepper-logo</a></span><span class="RktPn">)</span></td></tr><tr><td><p><img src="pict_111.png" alt="image" width="96.0" height="96.0"/></p></td></tr></table></blockquote></div></p></div></p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.7", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">top</a></span><span class="navright"> <a href="Icons.html" title="backward to "1 Icons"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Images"" data-pltdoc="x">up</a> <a href="Embedding_Bitmaps_in_Compiled_Files.html" title="forward to "3 Embedding Bitmaps in Compiled Files"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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