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+<!doctype HTML PUBLIC "-//IETF//DTD HTML//EN">
+<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+
+<title>Other Toolkits</title>
+<link rel="stylesheet" type="text/css" href="../style.css">
+</head>
+
+<body>
+
+<h1>Comparing CD with Other Graphics Libraries</h1>
+
+ <p>There are other graphics libraries, with some portability among operational
+ systems, available on the Internet. Among them we can highlight:</p>
+ <ul>
+ <li><strong>GKS</strong> - Very complete 2D and 3D graphics library, but
+ with limited image resources. It is an ISO standard, and it implementations
+ are usually commercial. Tecgraf has an implementation of GKS which is no
+ longer used, being replaced by CD. <a href="http://www.bsi.org.uk/sc24/">
+ http://www.bsi.org.uk/sc24/</a>.<br>
+ --------------------</li>
+ <li><strong>Mesa</strong> - 3D graphics library with support to the OpenGL
+ standard. Implemented in C. Aimed only at display, with attribute functions
+ for illumination and shading features.
+ <a href="http://www.mesa3d.org/" target="_blank">http://www.mesa3d.org/</a>.</li>
+ <li><strong>OpenGL</strong> - 3D graphics library with some 2D support.
+ Aimed only at display. A window CD canvas can coexist with an OpenGL canvas
+ at the same time. Note: When Double Buffer is used, do not forget to swap
+ buffer before redrawing with the CD library. <a href="http://www.opengl.org">
+ http://www.opengl.org</a>.<br>
+ --------------------</li>
+ <li><strong>GGI</strong> - 2D graphics library aimed only at display.
+ <a href="http://www.ggi-project.org/">http://www.ggi-project.org/</a>.</li>
+ <li><strong>GD</strong> - Library only for drawing on images, saves PNG
+ files. Implemented in C. <a href="http://www.boutell.com/gd/">
+ http://www.boutell.com/gd/</a>.</li>
+ <li><strong>GDK</strong> - Used by the GTK user interface toolkit.
+ Implemented in C. Aimed only at display, and contains several functions for
+ managing windows, keyboard and mouse. <a href="http://www.gtk.org/">
+ http://www.gtk.org/</a>.</li>
+ <li><b>CAIRO</b> - A vector graphics library designed to provide
+ high-quality display and print output. Very interesting, lots of functions,
+ usually render in bitmaps on native systems. Display hardware acceleration is used
+ almost only to display the bitmaps. Although it can reach high quality
+ rendering.
+ <a href="http://cairographics.org/">http://cairographics.org/</a>.</li>
+ <li><strong>AGG</strong> - The AGG Project (Anti-Grain Geometry). High
+ Fidelity 2D Graphics A High Quality Rendering Engine for C++. Renders to a
+ bitmap then transfer it to the native system, just like Cairo. GNU GPL
+ license.&nbsp; <a href="http://www.antigrain.com/">http://www.antigrain.com/</a> </li>
+ </ul>
+ <p>Most of them are aimed only at one type of driver, usually display or
+ images, and sometimes user interface routines were also included. Others add
+ 3D drawing routines, as well as scene illumination routines. All this
+ unnecessarily increases their complexity and does not make them more complete
+ as 2D graphic libraries.</p>
+ <p>There are also several Graphics User Interface libraries that contain
+ drawing functions, like Qt and wxWidgets. </p>
+ <p>As to performance, CD is as good as any other, in some cases having a
+ better performance. Thus, the CD library offers unique features and quality as
+ a portable 2D graphic library.</p>
+
+
+</body>
+
+</html>