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<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<title>Simulation</title>
<link rel="stylesheet" type="text/css" href="../../style.css">
</head>
<body>
<h2>Simulation Base Driver</h2>
<p>The Simulation driver was created to simulate functions that were not supported by some CD drivers. It works
jointly with the other driver (known as "client"), using its pixel, line and text functions to simulate arcs, sectors,
polygons, boxes, and fillings with styles.</p>
<p><b>Important:</b> All simulation primitives are based in the client's Pixel, Image and/or Line functions.</p>
<h3>Use</h3>
<p>The Simulation driver is used in several parts of the CD library.</p>
<p>In many drivers, the behavior of a given primitive may not be the expected. Usually this is documented in the
manual. If you wish to activate the simulation of a primitive, simply call function <strong>
<font face="Courier"><a href="../func/init.html#cdSimulate">cdSimulate</a></font></strong>
with the code of the primitive to be simulated.</p>
<h3>Behavior of Functions</h3>
<h4>Clipping</h4>
<ul>
<li>Clipping is not implemented in the simulation base driver. The primary
driver must implement its own clipping.</li>
</ul>
<h4>Attributes</h4>
<ul>
<li><a href="../func/filled.html#cdLineCap"><font face="Courier"><strong>
LineCap</strong></font></a>: only <font face="Courier">CD_CAPFLAT</font> is supported.</li>
<li><a href="../func/filled.html#cdLineJoin"><font face="Courier"><strong>
LineJoin</strong></font></a>: only <font face="Courier">CD_MITER</font> is supported.</li>
<li><font face="Courier"><strong><a href="../func/lines.html#cdLineStyle">
LineStyle</a></strong></font>: If line width is greater than 1, the style is
always continuous.</li>
<li><a href="../func/text.html#cdFont"><font face="Courier"><strong>Font</strong></font></a>:
Selects a True Type font file for the
<a target="_blank" href="http://www.freetype.org/">FreeType</a> library to
render the text. Notice that TTF fonts have different files for different font styles, like bold and italic. Font files can be in the
current directory, in the directory pointed by the CDDIR environment variable, in Windows in the system defined Font
directory, or using the full path of the file. <br>
Old name "System" is mapped to "Courier". For the know font names "Courier" (<font face="Courier">cour</font>),
"Times" (<font face="Courier">times</font>) and "Helvetica" (<font face="Courier">arial</font>),
the styles are added to the font file name as a suffix: "bd", "i" and "bi" are
used for bold, italic and bold-italic. For other fonts, it will first check
for a font map added using the attribute <strong>ADDFONTMAP</strong>, if
failed it will try to load the type_face name without any change, if fail it
will add the style suffix to the type_face and try to load again. The ".ttf"
file extension is always automatically added to the end of the file name.</li>
</ul>
<h4><strong>Primitives</strong> </h4>
<ul>
<li><b><font face="Courier"><a href="../func/marks.html#cdPixel">Pixel</a></font></b>:
always uses the client's pixel function. When clipping simulation is active, it executes area and polygon clipping.</li>
<li><font face="Courier"><a href="../func/lines.html#cdLine"><b>Line</b></a></font>:
draws lines pixel per pixel.</li>
<li><font face="Courier"><strong><a href="../func/lines.html#cdRect">Rect</a></strong></font>:
simulated using the client's <strong>Line</strong>.</li>
<li><font face="Courier"><a href="../func/lines.html#cdArc"><b>Arc</b></a></font>:
simulated using the client's <strong>Line</strong>. </li>
<li><font face="Courier"><a href="../func/filled.html#cdSector"><b>Sector</b></a></font>:
simulated using the client's <strong>Poly</strong>. </li>
<li><font face="Courier"><b><a href="../func/filled.html#cdChord">Chord</a></b></font>:
simulated using the client's <strong>Poly</strong></li>
<li><font face="Courier"><a href="../func/filled.html#cdBox"><b>Box</b></a></font>:
simulated using the client's <strong>Poly</strong>. </li>
<li><font face="Courier"><b><a href="../func/lines.html#cdBegin">Begin</a></b></font>,
<font face="Courier"><a href="../func/lines.html#cdVertex"><b>Vertex</b></a></font>
and <font face="Courier"><a href="../func/lines.html#cdEnd"><b>End</b></a></font>:
simulate using the <strong>Line</strong> or <strong>Pixel</strong> functions, depending on the interior style.</li>
<li><font face="Courier"><a href="../func/text.html#cdText"><b>Text</b></a></font>:
text simulation is made using TrueType font files in a transparent way for the
user. Oriented text is not supported.</li>
</ul>
<h4>Exclusive Attributes</h4>
<ul>
<li>"<strong>ADDFONTMAP</strong>": Add a font map between a type face
name and a file name. It has the format "Type Face=filename", For ex: "Arial
Narrow Bold=ARIALNB". "Type Face" is not case sensitive.</li>
</ul>
</body>
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