ft2-module_management.html
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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>FreeType-2.1.10 API Reference</title><style type="text/css"> body { font-family: Verdana, Geneva, Arial, Helvetica, serif; color: #000000; background: #FFFFFF; } p { text-align: justify; } h1 { text-align: center; } li { text-align: justify; } a:link { color: #0000EF; } a:visited { color: #51188E; } a:hover { color: #FF0000; } span.keyword { font-family: monospace; text-align: left; white-space: pre; color: darkblue; } pre.colored { color: blue; } ul.empty { list-style-type: none; }</style></head><body><center><h1>FreeType-2.1.10 API Reference</h1></center><center><h1>Module Management</h1></center><h2>Synopsis</h2><table align=center cellspacing=5 cellpadding=0 border=0><tr><td></td><td><a href="#FT_Module_Class">FT_Module_Class</a></td><td></td><td><a href="#FT_New_Library">FT_New_Library</a></td><td></td><td><a href="#FT_Renderer_Class">FT_Renderer_Class</a></td></tr><tr><td></td><td><a href="#FT_Add_Module">FT_Add_Module</a></td><td></td><td><a href="#FT_Done_Library">FT_Done_Library</a></td><td></td><td><a href="#FT_Get_Renderer">FT_Get_Renderer</a></td></tr><tr><td></td><td><a href="#FT_Get_Module">FT_Get_Module</a></td><td></td><td><a href="#FT_Set_Debug_Hook">FT_Set_Debug_Hook</a></td><td></td><td><a href="#FT_Set_Renderer">FT_Set_Renderer</a></td></tr><tr><td></td><td><a href="#FT_Remove_Module">FT_Remove_Module</a></td><td></td><td><a href="#FT_Add_Default_Modules">FT_Add_Default_Modules</a></td><td></td><td></td></tr></table><br><br><table align=center width="87%"><tr><td><p>The definitions below are used to manage modules within FreeType. Modules can be added, upgraded, and removed at runtime.</p></td></tr></table><br><table align=center width="75%"><tr><td><h4><a name="FT_Module_Class">FT_Module_Class</a></h4><table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Module_Class_ { <a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> module_flags; <a href="ft2-basic_types.html#FT_Long">FT_Long</a> module_size; <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_String">FT_String</a>* module_name; <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> module_version; <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> module_requires; <span class="keyword">const</span> <span class="keyword">void</span>* module_interface; FT_Module_Constructor module_init; FT_Module_Destructor module_done; FT_Module_Requester get_interface; } <b>FT_Module_Class</b>;</pre></table><br><table align=center width="87%"><tr><td><p>The 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>module_flags</b></td><td><p>Bit flags describing the module.</p></td></tr><tr valign=top><td><b>module_size</b></td><td><p>The size of one module object/instance in bytes.</p></td></tr><tr valign=top><td><b>module_name</b></td><td><p>The name of the module.</p></td></tr><tr valign=top><td><b>module_version</b></td><td><p>The version, as a 16.16 fixed number (major.minor).</p></td></tr><tr valign=top><td><b>module_requires</b></td><td><p>The version of FreeType this module requires (starts at version 2.0, i.e 0x20000)</p></td></tr><tr valign=top><td><b>module_init</b></td><td><p>A function used to initialize (not create) a new module object.</p></td></tr><tr valign=top><td><b>module_done</b></td><td><p>A function used to finalize (not destroy) a given module object</p></td></tr><tr valign=top><td><b>get_interface</b></td><td><p>Queries a given module for a specific interface by name.</p></td></tr></table></td></tr></table></td></tr></table><hr width="75%"><table align=center width="75%"><tr><td><h4><a name="FT_Add_Module">FT_Add_Module</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_Add_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <span class="keyword">const</span> <a href="ft2-module_management.html#FT_Module_Class">FT_Module_Class</a>* clazz );</pre></table><br><table align=center width="87%"><tr><td><p>Adds a new module to a given library instance.</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>clazz</b></td><td><p>A pointer to class descriptor for the module.</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>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></td></tr></table></td></tr></table><hr width="75%"><table align=center width="75%"><tr><td><h4><a name="FT_Get_Module">FT_Get_Module</a></h4><table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-base_interface.html#FT_Module">FT_Module</a> ) <b>FT_Get_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <span class="keyword">const</span> <span class="keyword">char</span>* module_name );</pre></table><br><table align=center width="87%"><tr><td><p>Finds a module by its name.</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>module_name</b></td><td><p>The module's name (as an ASCII string).</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 module handle. 0 if none was 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>You should better be familiar with FreeType internals to know which module to look for :-)</p></td></tr></table></td></tr></table><hr width="75%"><table align=center width="75%"><tr><td><h4><a name="FT_Remove_Module">FT_Remove_Module</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_Remove_Module</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <a href="ft2-base_interface.html#FT_Module">FT_Module</a> module );</pre></table><br><table align=center width="87%"><tr><td><p>Removes a given module from a library instance.</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 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>module</b></td><td><p>A handle to a module 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><table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td><p>The module object is destroyed by the function in case of success.</p></td></tr></table></td></tr></table><hr width="75%"><table align=center width="75%"><tr><td><h4><a name="FT_New_Library">FT_New_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_New_Library</b>( <a href="ft2-system_interface.html#FT_Memory">FT_Memory</a> memory, <a href="ft2-base_interface.html#FT_Library">FT_Library</a> *alibrary );</pre></table><br><table align=center width="87%"><tr><td><p>This function is used to create a new FreeType library instance from a given memory object. It is thus possible to use libraries with distinct memory allocators within the same program.</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>memory</b></td><td><p>A handle to the original memory object.</p></td></tr></table></td></tr></table>⌨️ 快捷键说明
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