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<title>FreeType-2.8 API Reference</title>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
<h1>FreeType-2.8 API Reference</h1>

<h1 id="sizes_management">Size Management</h1>
<h2>Synopsis</h2>
<table class="synopsis">
<tr><td><a href="#FT_New_Size">FT_New_Size</a></td><td><a href="#FT_Done_Size">FT_Done_Size</a></td><td><a href="#FT_Activate_Size">FT_Activate_Size</a></td><td></td></tr>
</table>

<p>When creating a new face object (e.g., with <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a>), an <a href="ft2-base_interface.html#FT_Size">FT_Size</a> object is automatically created and used to store all pixel-size dependent information, available in the &lsquo;face-&gt;size&rsquo; field.</p>
<p>It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a> and <a href="ft2-sizes_management.html#FT_Done_Size">FT_Done_Size</a>.</p>
<p>Note that <a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a> and <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a> only modify the contents of the current &lsquo;active&rsquo; size; you thus need to use <a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a> to change it.</p>
<p>99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these.</p>

<div class="section">
<h3 id="FT_New_Size">FT_New_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
  FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
  <b>FT_New_Size</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a>   face,
               <a href="ft2-base_interface.html#FT_Size">FT_Size</a>*  size );
</pre>

<p>Create a new size object from a given face object.</p>

<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to a parent face object.</p>
</td></tr>
</table>

<h4>output</h4>
<table class="fields">
<tr><td class="val" id="asize">asize</td><td class="desc">
<p>A handle to a new size object.</p>
</td></tr>
</table>

<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>

<h4>note</h4>
<p>You need to call <a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a> in order to select the new size for upcoming calls to <a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a>, <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>, <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>, etc.</p>

<hr>
<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>

<div class="section">
<h3 id="FT_Done_Size">FT_Done_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
  FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
  <b>FT_Done_Size</b>( <a href="ft2-base_interface.html#FT_Size">FT_Size</a>  size );
</pre>

<p>Discard a given size object. Note that <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a> automatically discards all size objects allocated with <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a>.</p>

<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>

<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>

<div class="section">
<h3 id="FT_Activate_Size">FT_Activate_Size</h3>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<pre>
  FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
  <b>FT_Activate_Size</b>( <a href="ft2-base_interface.html#FT_Size">FT_Size</a>  size );
</pre>

<p>Even though it is possible to create several size objects for a given face (see <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a> for details), functions like <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a> only use the one that has been activated last to determine the &lsquo;current character pixel size&rsquo;.</p>
<p>This function can be used to &lsquo;activate&rsquo; a previously created size object.</p>

<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>

<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p>

<h4>note</h4>
<p>If &lsquo;face&rsquo; is the size's parent face object, this function changes the value of &lsquo;face-&gt;size&rsquo; to the input size handle.</p>

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Code Editor : ft2-sizes_management.html