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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>Images</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="" class="tocviewselflink" 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="Logos.html" class="tocviewlink" 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><span class="tocsublinknumber"></span><a href="#%28part._top%29" class="tocsubseclink" data-pltdoc="x">Images</a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.3</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, "6.3", "../");" 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("6.3");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.3");">up</a> <a href="Icons.html" title="forward to "1 Icons"" data-pltdoc="x">next →</a></span> </div><h2 x-source-module="(lib "images/scribblings/images.scrbl")" x-source-pkg="images-doc" x-part-tag=""top""><a name="(part._top)"></a><a name="(part._.Images)"></a>Images</h2><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>This library contains convenient functions for constructing icons and logos, and will eventually offer the same for other <span class="RktSym">bitmap%</span>s.
The idea is to make it easy to include such things in your own programs.</p><p>Generally, the images in this library are computed when requested, not loaded from disk.
Most of them are drawn on a <span class="RktSym">dc<%></span> and then <a href="http://en.wikipedia.org/wiki/Ray_tracing_%28graphics%29">ray traced</a>.
Ray tracing images can become computationally expensive, so this library also includes <a href="Embedding_Bitmaps_in_Compiled_Files.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">images/compile-time</span></a>, which makes it easy to compute images at compile time and access them at run time.</p><p>The ray tracing API will eventually be finalized and made public.
This Racket release begins doing so by finalizing and making public the basic image API used by the ray tracer.
It is provided by the <a href="flomap_title.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">images/flomap</span></a> module.</p><table cellspacing="0" cellpadding="0"><tr><td><p><span class="hspace"> </span><a href="Icons.html" class="toptoclink" data-pltdoc="x">1<span class="hspace"> </span>Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._.What_is_an_icon_%29" class="toclink" data-pltdoc="x">1.1<span class="hspace"> </span>What is an icon?</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._.About_.These_.Icons%29" class="toclink" data-pltdoc="x">1.2<span class="hspace"> </span>About These Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._.Icon_.Style%29" class="toclink" data-pltdoc="x">1.3<span class="hspace"> </span>Icon Style</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._arrows%29" class="toclink" data-pltdoc="x">1.4<span class="hspace"> </span>Arrow Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._control%29" class="toclink" data-pltdoc="x">1.5<span class="hspace"> </span>Control Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._file%29" class="toclink" data-pltdoc="x">1.6<span class="hspace"> </span>File Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._symbol%29" class="toclink" data-pltdoc="x">1.7<span class="hspace"> </span>Symbol and Text Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._misc%29" class="toclink" data-pltdoc="x">1.8<span class="hspace"> </span>Miscellaneous Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._stickman%29" class="toclink" data-pltdoc="x">1.9<span class="hspace"> </span>Stickman Icons</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Icons.html#%28part._tool%29" class="toclink" data-pltdoc="x">1.10<span class="hspace"> </span>Tool Icons</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Logos.html" class="toptoclink" data-pltdoc="x">2<span class="hspace"> </span>Logos</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Embedding_Bitmaps_in_Compiled_Files.html" class="toptoclink" data-pltdoc="x">3<span class="hspace"> </span>Embedding Bitmaps in Compiled Files</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="flomap_title.html" class="toptoclink" data-pltdoc="x">4<span class="hspace"> </span>Floating-Point Bitmaps</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Overview.html" class="toclink" data-pltdoc="x">4.1<span class="hspace"> </span>Overview</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Overview.html#%28part._.Motivation%29" class="toclink" data-pltdoc="x">4.1.1<span class="hspace"> </span>Motivation</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Overview.html#%28part._flomap~3aconceptual%29" class="toclink" data-pltdoc="x">4.1.2<span class="hspace"> </span>Conceptual Model</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Overview.html#%28part._flomap~3aopacity%29" class="toclink" data-pltdoc="x">4.1.3<span class="hspace"> </span>Opacity (Alpha Components)</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Overview.html#%28part._flomap~3alayout%29" class="toclink" data-pltdoc="x">4.1.4<span class="hspace"> </span>Data Layout</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Struct_Type_and_Accessors.html" class="toclink" data-pltdoc="x">4.2<span class="hspace"> </span>Struct Type and Accessors</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Conversion_and_Construction.html" class="toclink" data-pltdoc="x">4.3<span class="hspace"> </span>Conversion and Construction</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Component_Operations.html" class="toclink" data-pltdoc="x">4.4<span class="hspace"> </span>Component Operations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Pointwise_Operations.html" class="toclink" data-pltdoc="x">4.5<span class="hspace"> </span>Pointwise Operations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Gradients_and_Normals.html" class="toclink" data-pltdoc="x">4.6<span class="hspace"> </span>Gradients and Normals</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Blur.html" class="toclink" data-pltdoc="x">4.7<span class="hspace"> </span>Blur</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Resizing.html" class="toclink" data-pltdoc="x">4.8<span class="hspace"> </span>Resizing</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Compositing.html" class="toclink" data-pltdoc="x">4.9<span class="hspace"> </span>Compositing</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Spatial_Transformations.html" class="toclink" data-pltdoc="x">4.10<span class="hspace"> </span>Spatial Transformations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Spatial_Transformations.html#%28part._.Provided_.Transformations%29" class="toclink" data-pltdoc="x">4.10.1<span class="hspace"> </span>Provided Transformations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Spatial_Transformations.html#%28part._.General_.Transformations%29" class="toclink" data-pltdoc="x">4.10.2<span class="hspace"> </span>General Transformations</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Spatial_Transformations.html#%28part._.Lens_.Projection_and_.Correction%29" class="toclink" data-pltdoc="x">4.10.3<span class="hspace"> </span>Lens Projection and Correction</a></p></td></tr><tr><td><p><span class="hspace"> </span><a href="Effects.html" class="toclink" data-pltdoc="x">4.11<span class="hspace"> </span>Effects</a></p></td></tr></table><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, "6.3", "../");" 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("6.3");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to 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