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- <p><a href="https://www.freetype.org">FreeType</a> &raquo; <a href="../">Docs</a> &raquo; <a href="index.html#support-api">Support API</a> &raquo; External Debugging APIs</p>
-<hr />
-<h1 id="external-debugging-apis">External Debugging APIs<a class="headerlink" href="#external-debugging-apis" title="Permanent link">&para;</a></h1>
-<h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">&para;</a></h2>
-<p>This section contains the declarations of public functions that enables fine control of what the <code>FT_DEBUG_LOGGING</code> macro outputs.</p>
-<h2 id="ft_trace_set_level">FT_Trace_Set_Level<a class="headerlink" href="#ft_trace_set_level" title="Permanent link">&para;</a></h2>
-<div class = "codehilite"><pre><code> FT_EXPORT( <span class="keyword">void</span> )
- <b>FT_Trace_Set_Level</b>( <span class="keyword">const</span> <span class="keyword">char</span>* tracing_level );
-</code></pre></div>
-
-<p>Change the levels of tracing components of FreeType at run time.</p>
-<h4>input</h4>
-<table class="fields">
-<tr><td class="val" id="tracing_level">tracing_level</td><td class="desc">
-<p>New tracing value.</p>
-</td></tr>
-</table>
-
-<h4>example</h4>
-
-<p>The following call makes FreeType trace everything but the &lsquo;memory&rsquo; component.
-<div class="highlight"><pre><span></span><code>FT_Trace_Set_Level( &quot;any:7 memory:0 );
-</code></pre></div></p>
-<h4>note</h4>
-
-<p>This function does nothing if compilation option <code>FT_DEBUG_LOGGING</code> isn't set.</p>
-<h4>since</h4>
-
-<p>2.11</p>
-<hr>
-
-<h2 id="ft_trace_set_default_level">FT_Trace_Set_Default_Level<a class="headerlink" href="#ft_trace_set_default_level" title="Permanent link">&para;</a></h2>
-<div class = "codehilite"><pre><code> FT_EXPORT( <span class="keyword">void</span> )
- <b>FT_Trace_Set_Default_Level</b>( <span class="keyword">void</span> );
-</code></pre></div>
-
-<p>Reset tracing value of FreeType's components to the default value (i.e., to the value of the <code>FT2_DEBUG</code> environment value or to NULL if <code>FT2_DEBUG</code> is not set).</p>
-<h4>note</h4>
-
-<p>This function does nothing if compilation option <code>FT_DEBUG_LOGGING</code> isn't set.</p>
-<h4>since</h4>
-
-<p>2.11</p>
-<hr>
-
-<h2 id="ft_custom_log_handler">FT_Custom_Log_Handler<a class="headerlink" href="#ft_custom_log_handler" title="Permanent link">&para;</a></h2>
-<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">void</span>
- (*<b>FT_Custom_Log_Handler</b>)( <span class="keyword">const</span> <span class="keyword">char</span>* ft_component,
- <span class="keyword">const</span> <span class="keyword">char</span>* fmt,
- va_list args );
-</code></pre></div>
-
-<p>A function typedef that is used to handle the logging of tracing and debug messages on a file system.</p>
-<h4>input</h4>
-<table class="fields">
-<tr><td class="val" id="ft_component">ft_component</td><td class="desc">
-<p>The name of <code>FT_COMPONENT</code> from which the current debug or error message is produced.</p>
-</td></tr>
-<tr><td class="val" id="fmt">fmt</td><td class="desc">
-<p>Actual debug or tracing message.</p>
-</td></tr>
-<tr><td class="val" id="args">args</td><td class="desc">
-<p>Arguments of debug or tracing messages.</p>
-</td></tr>
-</table>
-
-<h4>since</h4>
-
-<p>2.11</p>
-<hr>
-
-<h2 id="ft_set_log_handler">FT_Set_Log_Handler<a class="headerlink" href="#ft_set_log_handler" title="Permanent link">&para;</a></h2>
-<div class = "codehilite"><pre><code> FT_EXPORT( <span class="keyword">void</span> )
- <b>FT_Set_Log_Handler</b>( <a href="ft2-debugging_apis.html#ft_custom_log_handler">FT_Custom_Log_Handler</a> handler );
-</code></pre></div>
-
-<p>A function to set a custom log handler.</p>
-<h4>input</h4>
-<table class="fields">
-<tr><td class="val" id="handler">handler</td><td class="desc">
-<p>New logging function.</p>
-</td></tr>
-</table>
-
-<h4>note</h4>
-
-<p>This function does nothing if compilation option <code>FT_DEBUG_LOGGING</code> isn't set.</p>
-<h4>since</h4>
-
-<p>2.11</p>
-<hr>
-
-<h2 id="ft_set_default_log_handler">FT_Set_Default_Log_Handler<a class="headerlink" href="#ft_set_default_log_handler" title="Permanent link">&para;</a></h2>
-<div class = "codehilite"><pre><code> FT_EXPORT( <span class="keyword">void</span> )
- <b>FT_Set_Default_Log_Handler</b>( <span class="keyword">void</span> );
-</code></pre></div>
-
-<p>A function to undo the effect of <code><a href="ft2-debugging_apis.html#ft_set_log_handler">FT_Set_Log_Handler</a></code>, resetting the log handler to FreeType's built-in version.</p>
-<h4>note</h4>
-
-<p>This function does nothing if compilation option <code>FT_DEBUG_LOGGING</code> isn't set.</p>
-<h4>since</h4>
-
-<p>2.11</p>
-<hr>
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