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<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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