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//usr/share/doc/freetype-devel-2.3.11/reference/ft2-quick_advance.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>FreeType-2.3.11 API Reference</title> <style type="text/css"> body { font-family: Verdana, Geneva, Arial, Helvetica, serif; color: #000000; background: #FFFFFF; } p { text-align: justify; } h1 { text-align: center; } li { text-align: justify; } td { padding: 0 0.5em 0 0.5em; } td.left { padding: 0 0.5em 0 0.5em; text-align: left; } a:link { color: #0000EF; } a:visited { color: #51188E; } a:hover { color: #FF0000; } span.keyword { font-family: monospace; text-align: left; white-space: pre; color: darkblue; } pre.colored { color: blue; } ul.empty { list-style-type: none; } </style> </head> <body> <table align=center><tr><td><font size=-1>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-1>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <center><h1>FreeType-2.3.11 API Reference</h1></center> <center><h1> Quick retrieval of advance values </h1></center> <h2>Synopsis</h2> <table align=center cellspacing=5 cellpadding=0 border=0> <tr><td></td><td><a href="#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a></td><td></td><td><a href="#FT_Get_Advances">FT_Get_Advances</a></td></tr> <tr><td></td><td><a href="#FT_Get_Advance">FT_Get_Advance</a></td><td></td><td></td></tr> </table><br><br> <table align=center width="87%"><tr><td> <p>This section contains functions to quickly extract advance values without handling glyph outlines, if possible.</p> </td></tr></table><br> <table align=center width="75%"><tr><td> <h4><a name="FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a></h4> <table align=center width="87%"><tr><td> Defined in FT_ADVANCES_H (freetype/ftadvanc.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> #define <b>FT_ADVANCE_FLAG_FAST_ONLY</b> 0x20000000UL </pre></table><br> <table align=center width="87%"><tr><td> <p>A bit-flag to be OR-ed with the ‘flags’ parameter of the <a href="ft2-quick_advance.html#FT_Get_Advance">FT_Get_Advance</a> and <a href="ft2-quick_advance.html#FT_Get_Advances">FT_Get_Advances</a> functions.</p> <p>If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation.</p> <p>Typically, glyphs which are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly.</p> <p>Normal and bytecode hinted modes, which require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.</p> </td></tr></table><br> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Get_Advance">FT_Get_Advance</a></h4> <table align=center width="87%"><tr><td> Defined in FT_ADVANCES_H (freetype/ftadvanc.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Get_Advance</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face, <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> gindex, <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags, <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvance ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Retrieve the advance value of a given glyph outline in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>. By default, the unhinted advance is returned in font units.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>face</b></td><td> <p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p> </td></tr> <tr valign=top><td><b>gindex</b></td><td> <p>The glyph index.</p> </td></tr> <tr valign=top><td><b>load_flags</b></td><td> <p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, used to determine what kind of advances you need.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>padvance</b></td><td> <p>The advance value, in either font units or 16.16 format.</p> <p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, this is the vertical advance corresponding to a vertical layout. Otherwise, it is the horizontal advance in a horizontal layout.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>This function may fail if you use <a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a> and if the corresponding font backend doesn't have a quick way to retrieve the advances.</p> <p>A scaled advance is returned in 16.16 format but isn't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Get_Advances">FT_Get_Advances</a></h4> <table align=center width="87%"><tr><td> Defined in FT_ADVANCES_H (freetype/ftadvanc.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Get_Advances</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face, <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> start, <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> count, <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags, <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvances ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Retrieve the advance values of several glyph outlines in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>. By default, the unhinted advances are returned in font units.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>face</b></td><td> <p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p> </td></tr> <tr valign=top><td><b>start</b></td><td> <p>The first glyph index.</p> </td></tr> <tr valign=top><td><b>count</b></td><td> <p>The number of advance values you want to retrieve.</p> </td></tr> <tr valign=top><td><b>load_flags</b></td><td> <p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>padvance</b></td><td> <p>The advances, in either font units or 16.16 format. This array must contain at least ‘count’ elements.</p> <p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, these are the vertical advances corresponding to a vertical layout. Otherwise, they are the horizontal advances in a horizontal layout.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>This function may fail if you use <a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a> and if the corresponding font backend doesn't have a quick way to retrieve the advances.</p> <p>Scaled advances are returned in 16.16 format but aren't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> </body> </html>
