ft2-module_management.html

来自「嵌入式freetype库的应用文档包含freetype的简要说明和应用examp」· HTML 代码 · 共 425 行 · 第 1/2 页

<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td>
<table cellpadding=3>
<tr valign=top><td><b>alibrary</b></td><td>
<p>A pointer to handle of a new library object.</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>
<h4><a name="FT_Done_Library">FT_Done_Library</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_Done_Library</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a>  library );



  <span class="keyword">typedef</span> <span class="keyword">void</span>
  (*FT_DebugHook_Func)( <span class="keyword">void</span>*  arg );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Discards a given library object. This closes all drivers and discards all resource objects.</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>
<tr valign=top><td><b>library</b></td><td>
<p>A handle to the target library.</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>
<h4><a name="FT_Set_Debug_Hook">FT_Set_Debug_Hook</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <span class="keyword">void</span> )
  <b>FT_Set_Debug_Hook</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a>         library,
                     <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>            hook_index,
                     FT_DebugHook_Func  debug_hook );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Sets a debug hook function for debugging the interpreter of a font format.</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>
<tr valign=top><td><b>library</b></td><td>
<p>A handle to the library object.</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>
<tr valign=top><td><b>hook_index</b></td><td>
<p>The index of the debug hook. You should use the values defined in ftobjs.h, e.g. FT_DEBUG_HOOK_TRUETYPE.</p>
</td></tr>
<tr valign=top><td><b>debug_hook</b></td><td>
<p>The function used to debug the interpreter.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>Currently, four debug hook slots are available, but only two (for the TrueType and the Type 1 interpreter) are defined.</p>
</td></tr></table>
</td></tr></table><hr width="75%">
<table align=center width="75%"><tr><td>
<h4><a name="FT_Add_Default_Modules">FT_Add_Default_Modules</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <span class="keyword">void</span> )
  <b>FT_Add_Default_Modules</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a>  library );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Adds the set of default drivers to a given library object. This is only useful when you create a library object with FT_New_Library() (usually to plug a custom memory manager).</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>
<tr valign=top><td><b>library</b></td><td>
<p>A handle to a new library object.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table><hr width="75%">
<table align=center width="75%"><tr><td>
<h4><a name="FT_Renderer_Class">FT_Renderer_Class</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  <span class="keyword">typedef</span> <span class="keyword">struct</span>  FT_Renderer_Class_
  {
    <a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a>       root;

    <a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a>       glyph_format;

    FT_Renderer_RenderFunc     render_glyph;
    FT_Renderer_TransformFunc  transform_glyph;
    FT_Renderer_GetCBoxFunc    get_glyph_cbox;
    FT_Renderer_SetModeFunc    set_mode;

    <a href="ft2-raster.html#FT_Raster_Funcs">FT_Raster_Funcs</a>*           raster_class;

  } <b>FT_Renderer_Class</b>;

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>The renderer module class descriptor.</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>
<tr valign=top><td><b>root</b></td><td>
<p>The root FT_Module_Class fields.</p>
</td></tr>
<tr valign=top><td><b>glyph_format</b></td><td>
<p>The glyph image format this renderer handles.</p>
</td></tr>
<tr valign=top><td><b>render_glyph</b></td><td>
<p>A method used to render the image that is in a given glyph slot into a bitmap.</p>
</td></tr>
<tr valign=top><td><b>set_mode</b></td><td>
<p>A method used to pass additional parameters.</p>
</td></tr>
<tr valign=top><td><b>raster_class</b></td><td>
<p>For `FT_GLYPH_FORMAT_OUTLINE' renderers only, this is a pointer to its raster's class.</p>
</td></tr>
<tr valign=top><td><b>raster</b></td><td>
<p>For `FT_GLYPH_FORMAT_OUTLINE' renderers only. this is a pointer to the corresponding raster object, if any.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table><hr width="75%">
<table align=center width="75%"><tr><td>
<h4><a name="FT_Get_Renderer">FT_Get_Renderer</a></h4>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <a href="ft2-base_interface.html#FT_Renderer">FT_Renderer</a> )
  <b>FT_Get_Renderer</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a>       library,
                   <a href="ft2-basic_types.html#FT_Glyph_Format">FT_Glyph_Format</a>  format );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Retrieves the current renderer for a given glyph format.</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>
<tr valign=top><td><b>library</b></td><td>
<p>A handle to the library object.</p>
</td></tr>
<tr valign=top><td><b>format</b></td><td>
<p>The glyph format.</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>A renderer handle. 0 if none found.</p>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>An error will be returned if a module already exists by that name, or if the module requires a version of FreeType that is too great.</p>
<p>To add a new renderer, simply use FT_Add_Module(). To retrieve a renderer by its name, use FT_Get_Module().</p>
</td></tr></table>
</td></tr></table><hr width="75%">
<table align=center width="75%"><tr><td>
<h4><a name="FT_Set_Renderer">FT_Set_Renderer</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_Renderer</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a>     library,
                   <a href="ft2-base_interface.html#FT_Renderer">FT_Renderer</a>    renderer,
                   <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>        num_params,
                   <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a>*  parameters );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Sets the current renderer to use, and set additional mode.</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>
<tr valign=top><td><b>library</b></td><td>
<p>A handle to the library object.</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>
<tr valign=top><td><b>renderer</b></td><td>
<p>A handle to the renderer object.</p>
</td></tr>
<tr valign=top><td><b>num_params</b></td><td>
<p>The number of additional parameters.</p>
</td></tr>
<tr valign=top><td><b>parameters</b></td><td>
<p>Additional parameters.</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>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>In case of success, the renderer will be used to convert glyph images in the renderer's known format into bitmaps.</p>
<p>This doesn't change the current renderer for other formats.</p>
</td></tr></table>
</td></tr></table><hr width="75%">
</body>
</html>