<html> <head> <title>Struct FontMetrics</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="../../../../idl.css"> </head> <body> <div id="adc-idlref"> <a name="_top_"> </a><table class="navimain" border="0" cellpadding="3"> <tr> <td class="navimain"><a href="../module-ix.html" class="navimain">Overview</a></td> <td class="navimain"><a href="module-ix.html" class="navimain">Module</a></td> <td class="navimain"><a href="FontMetrics-xref.html" class="navimain">Use</a></td> <td class="navimainnone">Devguide</td> <td class="navimain"><a href="../../../../index-files/index-1.html" class="navimain">Index</a></td> </tr> </table> <table class="navisub" border="0" cellpadding="0"> <tr> <td class="navisub"><a href="#Elements" class="navisub">Elements' Summary</a></td> <td class="navisub"><a href="#ElementDetails" class="navisub">Elements' Details</a></td> </tr> </table> <hr> <table border="0" width="100%" cellpadding="5" cellspacing="3" class="title-table" style="margin-bottom:6pt;"> <tr> <td><p class="namechain"><a href="../../../../module-ix.html" class="namechain">::</a> <a href="../../../module-ix.html" class="namechain">com</a> :: <a href="../../module-ix.html" class="namechain">sun</a> :: <a href="../module-ix.html" class="namechain">star</a> :: <a href="module-ix.html" class="namechain">rendering</a> :: </p> </td> </tr> <tr> <td class="title"><table class="title-table" width="99%"> <tr> <td width="25%" class="title2">unpublished </td> <td width="50%" class="title">struct FontMetrics</td> <td width="*"/></tr> </table> </td> </tr> <tr> <td/></tr> <tr> <td><dl> <dt><b>Description</b></dt> <dd>Metrics global to the font, i.e. not specific to single glyphs. The font height is defined as ascent+descent+internalLeading, and therefore not explicitely included here.</dd> <dd><p> Please note that when querying FontMetrics from an XCanvasFont interface, all values here are given relative to the font cell size. That means, the referenceCharWidth and/or ascent+descent+internalLeading will approximately (rounded to integer device resolution, or exactly, if fractional font rendering is enabled) match the referenceAdvancement/cellSize members of the FontRequest for which the XCanvasFont was queried. Please be aware that the values returned in this structure only map one-to-one to device pixel, if the combined rendering transformation for text output equals the identity transformation. Otherwise, the text output (and thus the resulting metrics) will be subject to that transformation. Depending on the underlying font technology, actual device output might be off by up to one device pixel from the transformed metrics. </dd> <dt><b/></dt> <dd/></dl> </td> </tr> </table> <hr> <a name="Elements"/><table border="1" width="100%" cellpadding="5" cellspacing="0" class="subtitle"> <tr> <td class="subtitle" colspan="2">Elements' Summary</td> </tr> <tr> <td class="imsum_left"><a href="#Ascent">Ascent</a></td> <td class="imsum_right">Ascent (above the baseline) part of the font. </td> </tr> <tr> <td class="imsum_left"><a href="#Descent">Descent</a></td> <td class="imsum_right">Descent (below the baseline) part of the font. </td> </tr> <tr> <td class="imsum_left"><a href="#InternalLeading">InternalLeading</a></td> <td class="imsum_right">Extra space above ascent </td> </tr> <tr> <td class="imsum_left"><a href="#ExternalLeading">ExternalLeading</a></td> <td class="imsum_right">Extra space outside the font cells. </td> </tr> <tr> <td class="imsum_left"><a href="#ReferenceCharSize">ReferenceCharSize</a></td> <td class="imsum_right">This value specifies the reference character width of the font. </td> </tr> <tr> <td class="imsum_left"><a href="#UnderlineOffset">UnderlineOffset</a></td> <td class="imsum_right">Specifies the offset to be added to the baseline when drawing underlined text. </td> </tr> <tr> <td class="imsum_left"><a href="#StrikeThroughOffset">StrikeThroughOffset</a></td> <td class="imsum_right">Specifies the offset to be added to the baseline when striking through the text. </td> </tr> </table> <a name="ElementDetails"/><table border="1" width="100%" cellpadding="5" cellspacing="0" class="subtitle"> <tr> <td class="subtitle">Elements' Details</td> </tr> <tr> <td class="imdetail"><a name="Ascent" class="membertitle">Ascent</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>Ascent</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Ascent (above the baseline) part of the font. </dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="Descent" class="membertitle">Descent</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>Descent</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Descent (below the baseline) part of the font.</dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="InternalLeading" class="membertitle">InternalLeading</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>InternalLeading</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Extra space above ascent</dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="ExternalLeading" class="membertitle">ExternalLeading</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>ExternalLeading</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Extra space outside the font cells.</dd> <dd><p> It should not contain ink marks and is typically used by the font designer to modify the line distance.<p> </dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="ReferenceCharSize" class="membertitle">ReferenceCharSize</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>ReferenceCharSize</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>This value specifies the reference character width of the font.</dd> <dd><p> It's roughly equivalent to the average width of all characters, and if one needs a font with double character width, the referenceCharSize should be doubled.<p> </dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="UnderlineOffset" class="membertitle">UnderlineOffset</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>UnderlineOffset</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Specifies the offset to be added to the baseline when drawing underlined text. </dd> </dl> </td> </tr> </table> </td> </tr> <tr> <td class="imdetail"><a name="StrikeThroughOffset" class="membertitle">StrikeThroughOffset</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-data" bgcolor="#ffffff" align="center"> <tr> <td>double <b>StrikeThroughOffset</b>;<hr> <dl> <dt><b>Description</b></dt> <dd>Specifies the offset to be added to the baseline when striking through the text. </dd> </dl> </td> </tr> </table> </td> </tr> </table> <a href="#_top_">Top of Page</a><hr size="3"><p class="copyright" align="center">Copyright © 2008 Sun Microsystems, Inc.</p> </div> <!-- id="adc-idlref" --> </body> </html>
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