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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<center><h1>FreeType-2.3.5 API Reference</h1></center>
<center><h1>
Multiple Masters
</h1></center>
<h2>Synopsis</h2>
<table align=center cellspacing=5 cellpadding=0 border=0>
<tr><td></td><td><a href="#FT_MM_Axis">FT_MM_Axis</a></td><td></td><td><a href="#FT_Get_MM_Var">FT_Get_MM_Var</a></td></tr>
<tr><td></td><td><a href="#FT_Multi_Master">FT_Multi_Master</a></td><td></td><td><a href="#FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a></td></tr>
<tr><td></td><td><a href="#FT_Var_Axis">FT_Var_Axis</a></td><td></td><td><a href="#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a></td></tr>
<tr><td></td><td><a href="#FT_Var_Named_Style">FT_Var_Named_Style</a></td><td></td><td><a href="#FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a></td></tr>
<tr><td></td><td><a href="#FT_MM_Var">FT_MM_Var</a></td><td></td><td><a href="#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a></td></tr>
<tr><td></td><td><a href="#FT_Get_Multi_Master">FT_Get_Multi_Master</a></td><td></td><td></td></tr>
</table><br><br>
<table align=center width="87%"><tr><td>
<p>The following types and functions are used to manage Multiple Master fonts, i.e., the selection of specific design instances by setting design axis coordinates.</p>
<p>George Williams has extended this interface to make it work with both Type 1 Multiple Masters fonts and GX distortable (var) fonts. Some of these routines only work with MM fonts, others will work with both types. They are similar enough that a consistent interface makes sense.</p>
</td></tr></table><br>
<table align=center width="75%"><tr><td>
<h4><a name="FT_MM_Axis">FT_MM_Axis</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MM_Axis_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* name;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> minimum;
<a href="ft2-basic_types.html#FT_Long">FT_Long</a> maximum;
} <b>FT_MM_Axis</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A simple structure used to model a given axis in design space for Multiple Masters fonts.</p>
<p>This structure can't be used for GX var fonts.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>name</b></td><td>
<p>The axis's name.</p>
</td></tr>
<tr valign=top><td><b>minimum</b></td><td>
<p>The axis's minimum design coordinate.</p>
</td></tr>
<tr valign=top><td><b>maximum</b></td><td>
<p>The axis's maximum design coordinate.</p>
</td></tr>
</table>
</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_Multi_Master">FT_Multi_Master</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Multi_Master_
{
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_axis;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_designs;
<a href="ft2-multiple_masters.html#FT_MM_Axis">FT_MM_Axis</a> axis[T1_MAX_MM_AXIS];
} <b>FT_Multi_Master</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A structure used to model the axes and space of a Multiple Masters font.</p>
<p>This structure can't be used for GX var fonts.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>num_axis</b></td><td>
<p>Number of axes. Cannot exceed 4.</p>
</td></tr>
<tr valign=top><td><b>num_designs</b></td><td>
<p>Number of designs; should be normally 2^num_axis even though the Type 1 specification strangely allows for intermediate designs to be present. This number cannot exceed 16.</p>
</td></tr>
<tr valign=top><td><b>axis</b></td><td>
<p>A table of axis descriptors.</p>
</td></tr>
</table>
</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_Var_Axis">FT_Var_Axis</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Var_Axis_
{
<a href="ft2-basic_types.html#FT_String">FT_String</a>* name;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> minimum;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> def;
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> maximum;
<a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> tag;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> strid;
} <b>FT_Var_Axis</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A simple structure used to model a given axis in design space for Multiple Masters and GX var fonts.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>name</b></td><td>
<p>The axis's name. Not always meaningful for GX.</p>
</td></tr>
<tr valign=top><td><b>minimum</b></td><td>
<p>The axis's minimum design coordinate.</p>
</td></tr>
<tr valign=top><td><b>def</b></td><td>
<p>The axis's default design coordinate. FreeType computes meaningful default values for MM; it is then an integer value, not in 16.16 format.</p>
</td></tr>
<tr valign=top><td><b>maximum</b></td><td>
<p>The axis's maximum design coordinate.</p>
</td></tr>
<tr valign=top><td><b>tag</b></td><td>
<p>The axis's tag (the GX equivalent to ‘name’). FreeType provides default values for MM if possible.</p>
</td></tr>
<tr valign=top><td><b>strid</b></td><td>
<p>The entry in ‘name’ table (another GX version of ‘name’). Not meaningful for MM.</p>
</td></tr>
</table>
</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_Var_Named_Style">FT_Var_Named_Style</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Var_Named_Style_
{
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> strid;
} <b>FT_Var_Named_Style</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A simple structure used to model a named style in a GX var font.</p>
<p>This structure can't be used for MM fonts.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>coords</b></td><td>
<p>The design coordinates for this style. This is an array with one entry for each axis.</p>
</td></tr>
<tr valign=top><td><b>strid</b></td><td>
<p>The entry in ‘name’ table identifying this style.</p>
</td></tr>
</table>
</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_MM_Var">FT_MM_Var</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
<span class="keyword">typedef</span> <span class="keyword">struct</span> FT_MM_Var_
{
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_axis;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_designs;
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_namedstyles;
<a href="ft2-multiple_masters.html#FT_Var_Axis">FT_Var_Axis</a>* axis;
<a href="ft2-multiple_masters.html#FT_Var_Named_Style">FT_Var_Named_Style</a>* namedstyle;
} <b>FT_MM_Var</b>;
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A structure used to model the axes and space of a Multiple Masters or GX var distortable font.</p>
<p>Some fields are specific to one format and not to the other.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>fields</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>num_axis</b></td><td>
<p>The number of axes. The maximum value is 4 for MM; no limit in GX.</p>
</td></tr>
<tr valign=top><td><b>num_designs</b></td><td>
<p>The number of designs; should be normally 2^num_axis for MM fonts. Not meaningful for GX (where every glyph could have a different number of designs).</p>
</td></tr>
<tr valign=top><td><b>num_namedstyles</b></td><td>
<p>The number of named styles; only meaningful for GX which allows certain design coordinates to have a string ID (in the ‘name’ table) associated with them. The font can tell the user that, for example, Weight=1.5 is ‘Bold’.</p>
</td></tr>
<tr valign=top><td><b>axis</b></td><td>
<p>A table of axis descriptors. GX fonts contain slightly more data than MM.</p>
</td></tr>
<tr valign=top><td><b>namedstyles</b></td><td>
<p>A table of named styles. Only meaningful with GX.</p>
</td></tr>
</table>
</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_Multi_Master">FT_Get_Multi_Master</a></h4>
<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_Multi_Master</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-multiple_masters.html#FT_Multi_Master">FT_Multi_Master</a> *amaster );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Retrieves the Multiple Master descriptor of a given font.</p>
<p>This function can't be used with GX fonts.</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>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the source face.</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>
<table cellpadding=3 border=0>
<tr valign=top><td><b>amaster</b></td><td>
<p>The Multiple Masters descriptor.</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>
</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_MM_Var">FT_Get_MM_Var</a></h4>
<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_MM_Var</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-multiple_masters.html#FT_MM_Var">FT_MM_Var</a>* *amaster );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Retrieves the Multiple Master/GX var descriptor of a given font.</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>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the source face.</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>
<table cellpadding=3 border=0>
<tr valign=top><td><b>amaster</b></td><td>
<p>The Multiple Masters descriptor. Allocates a data structure, which the user must free (a single call to FT_FREE will do it).</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>
</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_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a></h4>
<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_Set_MM_Design_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Long">FT_Long</a>* coords );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>For Multiple Masters fonts, choose an interpolated font design through design coordinates.</p>
<p>This function can't be used with GX fonts.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the source face.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>num_coords</b></td><td>
<p>The number of design coordinates (must be equal to the number of axes in the font).</p>
</td></tr>
<tr valign=top><td><b>coords</b></td><td>
<p>An array of design coordinates.</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>
</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_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a></h4>
<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_Set_Var_Design_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>For Multiple Master or GX Var fonts, choose an interpolated font design through design coordinates.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the source face.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>num_coords</b></td><td>
<p>The number of design coordinates (must be equal to the number of axes in the font).</p>
</td></tr>
<tr valign=top><td><b>coords</b></td><td>
<p>An array of design coordinates.</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>
</td></tr></table>
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<table align=center width="75%"><tr><td><font size=-2>[<a href="
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<td width="100%"></td>
<td><font size=-2>[<a href="
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<table align=center width="75%"><tr><td>
<h4><a name="FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a></h4>
<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_Set_MM_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>For Multiple Masters and GX var fonts, choose an interpolated font design through normalized blend coordinates.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the source face.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<table cellpadding=3 border=0>
<tr valign=top><td><b>num_coords</b></td><td>
<p>The number of design coordinates (must be equal to the number of axes in the font).</p>
</td></tr>
<tr valign=top><td><b>coords</b></td><td>
<p>The design coordinates array (each element must be between 0 and 1.0).</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>
</td></tr></table>
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<table align=center width="75%"><tr><td>
<h4><a name="FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a></h4>
<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_Set_Var_Blend_Coordinates</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,
<a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_coords,
<a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a>* coords );
</pre></table><br>
<table align=center width="87%"><tr><td>
<p>This is another name of <a href="ft2-multiple_masters.html#FT_Set_MM_Blend_Coordinates">FT_Set_MM_Blend_Coordinates</a>.</p>
</td></tr></table><br>
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