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class="md-nav__link"> FT_Get_Advances </a> </li> <li class="md-nav__item"> <a href="#ft_advance_flag_fast_only" class="md-nav__link"> FT_ADVANCE_FLAG_FAST_ONLY </a> </li> </ul> </nav> </li> <li class="md-nav__item"> <a href="ft2-bitmap_handling.html" title="Bitmap Handling" class="md-nav__link"> Bitmap Handling </a> </li> <li class="md-nav__item"> <a href="ft2-raster.html" title="Scanline Converter" class="md-nav__link"> Scanline Converter </a> </li> <li class="md-nav__item"> <a href="ft2-glyph_stroker.html" title="Glyph Stroker" class="md-nav__link"> Glyph Stroker </a> </li> <li class="md-nav__item"> <a href="ft2-system_interface.html" title="System Interface" class="md-nav__link"> System Interface </a> </li> <li class="md-nav__item"> <a href="ft2-module_management.html" title="Module Management" class="md-nav__link"> Module Management </a> </li> <li class="md-nav__item"> <a href="ft2-gzip.html" title="GZIP Streams" class="md-nav__link"> GZIP Streams </a> </li> <li 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md-nav__toggle" data-md-toggle="nav-10" type="checkbox" id="nav-10"> <label class="md-nav__link" for="nav-10"> Miscellaneous </label> <nav class="md-nav" data-md-component="collapsible" data-md-level="1"> <label class="md-nav__title" for="nav-10"> Miscellaneous </label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="ft2-gx_validation.html" title="TrueTypeGX/AAT Validation" class="md-nav__link"> TrueTypeGX/AAT Validation </a> </li> <li class="md-nav__item"> <a href="ft2-incremental.html" title="Incremental Loading" class="md-nav__link"> Incremental Loading </a> </li> <li class="md-nav__item"> <a href="ft2-truetype_engine.html" title="The TrueType Engine" class="md-nav__link"> The TrueType Engine </a> </li> <li class="md-nav__item"> <a href="ft2-ot_validation.html" title="OpenType Validation" class="md-nav__link"> OpenType Validation </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component="toc"> <div class="md-sidebar__scrollwrap"> <div class="md-sidebar__inner"> <nav class="md-nav md-nav--secondary"> <label class="md-nav__title" for="__toc">Table of contents</label> <ul class="md-nav__list" data-md-scrollfix> <li class="md-nav__item"> <a href="#synopsis" class="md-nav__link"> Synopsis </a> </li> <li class="md-nav__item"> <a href="#ft_get_advance" class="md-nav__link"> FT_Get_Advance </a> </li> <li class="md-nav__item"> <a href="#ft_get_advances" class="md-nav__link"> FT_Get_Advances </a> </li> <li class="md-nav__item"> <a href="#ft_advance_flag_fast_only" class="md-nav__link"> FT_ADVANCE_FLAG_FAST_ONLY </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content"> <article class="md-content__inner md-typeset"> <p><a href="https://www.freetype.org">FreeType</a> » <a href="../">Docs</a> » <a href="index.html#support-api">Support API</a> » Quick retrieval of advance values</p> <hr /> <h1 id="quick-retrieval-of-advance-values">Quick retrieval of advance values<a class="headerlink" href="#quick-retrieval-of-advance-values" title="Permanent link">¶</a></h1> <h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">¶</a></h2> <p>This section contains functions to quickly extract advance values without handling glyph outlines, if possible.</p> <h2 id="ft_get_advance">FT_Get_Advance<a class="headerlink" href="#ft_get_advance" title="Permanent link">¶</a></h2> <p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p> <div class = "codehilite"><pre><code> 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 ); </code></pre></div> <p>Retrieve the advance value of a given glyph outline in an <code><a href="ft2-base_interface.html#ft_face">FT_Face</a></code>.</p> <h4>input</h4> <table class="fields"> <tr><td class="val" id="face">face</td><td class="desc"> <p>The source <code><a href="ft2-base_interface.html#ft_face">FT_Face</a></code> handle.</p> </td></tr> <tr><td class="val" id="gindex">gindex</td><td class="desc"> <p>The glyph index.</p> </td></tr> <tr><td class="val" id="load_flags">load_flags</td><td class="desc"> <p>A set of bit flags similar to those used when calling <code><a href="ft2-base_interface.html#ft_load_glyph">FT_Load_Glyph</a></code>, used to determine what kind of advances you need.</p> </td></tr> </table> <h4>output</h4> <table class="fields"> <tr><td class="val" id="padvance">padvance</td><td class="desc"> <p>The advance value. If scaling is performed (based on the value of <code>load_flags</code>), the advance value is in 16.16 format. Otherwise, it is in font units.</p> <p>If <code><a href="ft2-base_interface.html#ft_load_xxx">FT_LOAD_VERTICAL_LAYOUT</a></code> 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> <h4>return</h4> <p>FreeType error code. 0 means success.</p> <h4>note</h4> <p>This function may fail if you use <code><a href="ft2-quick_advance.html#ft_advance_flag_fast_only">FT_ADVANCE_FLAG_FAST_ONLY</a></code> 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 <code><a href="ft2-base_interface.html#ft_set_transform">FT_Set_Transform</a></code>.</p> <hr> <h2 id="ft_get_advances">FT_Get_Advances<a class="headerlink" href="#ft_get_advances" title="Permanent link">¶</a></h2> <p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p> <div class = "codehilite"><pre><code> 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 ); </code></pre></div> <p>Retrieve the advance values of several glyph outlines in an <code><a href="ft2-base_interface.html#ft_face">FT_Face</a></code>.</p> <h4>input</h4> <table class="fields"> <tr><td class="val" id="face">face</td><td class="desc"> <p>The source <code><a href="ft2-base_interface.html#ft_face">FT_Face</a></code> handle.</p> </td></tr> <tr><td class="val" id="start">start</td><td class="desc"> <p>The first glyph index.</p> </td></tr> <tr><td class="val" id="count">count</td><td class="desc"> <p>The number of advance values you want to retrieve.</p> </td></tr> <tr><td class="val" id="load_flags">load_flags</td><td class="desc"> <p>A set of bit flags similar to those used when calling <code><a href="ft2-base_interface.html#ft_load_glyph">FT_Load_Glyph</a></code>.</p> </td></tr> </table> <h4>output</h4> <table class="fields"> <tr><td class="val" id="padvance">padvance</td><td class="desc"> <p>The advance values. This array, to be provided by the caller, must contain at least <code>count</code> elements.</p> <p>If scaling is performed (based on the value of <code>load_flags</code>), the advance values are in 16.16 format. Otherwise, they are in font units.</p> <p>If <code><a href="ft2-base_interface.html#ft_load_xxx">FT_LOAD_VERTICAL_LAYOUT</a></code> 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> <h4>return</h4> <p>FreeType error code. 0 means success.</p> <h4>note</h4> <p>This function may fail if you use <code><a href="ft2-quick_advance.html#ft_advance_flag_fast_only">FT_ADVANCE_FLAG_FAST_ONLY</a></code> 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 <code><a href="ft2-base_interface.html#ft_set_transform">FT_Set_Transform</a></code>.</p> <hr> <h2 id="ft_advance_flag_fast_only">FT_ADVANCE_FLAG_FAST_ONLY<a class="headerlink" href="#ft_advance_flag_fast_only" title="Permanent link">¶</a></h2> <p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p> <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_ADVANCE_FLAG_FAST_ONLY</b> 0x20000000L </code></pre></div> <p>A bit-flag to be OR-ed with the <code>flags</code> parameter of the <code><a href="ft2-quick_advance.html#ft_get_advance">FT_Get_Advance</a></code> and <code><a href="ft2-quick_advance.html#ft_get_advances">FT_Get_Advances</a></code> 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 that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly.</p> <p>Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.</p> <hr> </article> </div> </div> </main> <footer class="md-footer"> <div class="md-footer-nav"> <nav class="md-footer-nav__inner md-grid"> <a href="ft2-outline_processing.html" title="Outline Processing" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev"> <div class="md-flex__cell md-flex__cell--shrink"> <i class="md-icon md-icon--arrow-back md-footer-nav__button"></i> </div> <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"> <span class="md-flex__ellipsis"> <span class="md-footer-nav__direction"> Previous </span> Outline Processing </span> </div> </a> <a href="ft2-bitmap_handling.html" title="Bitmap Handling" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next"> <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"> <span class="md-flex__ellipsis"> <span class="md-footer-nav__direction"> Next </span> Bitmap Handling </span> </div> <div class="md-flex__cell md-flex__cell--shrink"> <i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i> </div> </a> </nav> </div> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class="md-footer-copyright"> <div class="md-footer-copyright__highlight"> Copyright 2020 <a href = "https://www.freetype.org/license.html">The FreeType Project</a>. </div> powered by <a href="https://www.mkdocs.org" target="_blank" rel="noopener">MkDocs</a> and <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener"> Material for MkDocs</a> </div> </div> </div> </footer> </div> <script src="assets/javascripts/application.c33a9706.js"></script> <script>app.initialize({version:"1.1",url:{base:"."}})</script> <script src="javascripts/extra.js"></script> </body> </html>