ftinit.c
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上传日期:2020-08-09
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- /***************************************************************************/
- /* */
- /* ftinit.c */
- /* */
- /* FreeType initialization layer (body). */
- /* */
- /* Copyright 1996-2001, 2002, 2005, 2007 by */
- /* David Turner, Robert Wilhelm, and Werner Lemberg. */
- /* */
- /* This file is part of the FreeType project, and may only be used, */
- /* modified, and distributed under the terms of the FreeType project */
- /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
- /* this file you indicate that you have read the license and */
- /* understand and accept it fully. */
- /* */
- /***************************************************************************/
- /*************************************************************************/
- /* */
- /* The purpose of this file is to implement the following two */
- /* functions: */
- /* */
- /* FT_Add_Default_Modules(): */
- /* This function is used to add the set of default modules to a */
- /* fresh new library object. The set is taken from the header file */
- /* `freetype/config/ftmodule.h'. See the document `FreeType 2.0 */
- /* Build System' for more information. */
- /* */
- /* FT_Init_FreeType(): */
- /* This function creates a system object for the current platform, */
- /* builds a library out of it, then calls FT_Default_Drivers(). */
- /* */
- /* Note that even if FT_Init_FreeType() uses the implementation of the */
- /* system object defined at build time, client applications are still */
- /* able to provide their own `ftsystem.c'. */
- /* */
- /*************************************************************************/
- #include <ft2build.h>
- #include FT_CONFIG_CONFIG_H
- #include FT_INTERNAL_OBJECTS_H
- #include FT_INTERNAL_DEBUG_H
- #include FT_MODULE_H
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
- #undef FT_COMPONENT
- #define FT_COMPONENT trace_init
- #undef FT_USE_MODULE
- #ifdef __cplusplus
- #define FT_USE_MODULE( x ) extern "C" const FT_Module_Class x;
- #else
- #define FT_USE_MODULE( x ) extern const FT_Module_Class x;
- #endif
- #include FT_CONFIG_MODULES_H
- #undef FT_USE_MODULE
- #define FT_USE_MODULE( x ) (const FT_Module_Class*)&(x),
- static
- const FT_Module_Class* const ft_default_modules[] =
- {
- #include FT_CONFIG_MODULES_H
- 0
- };
- /* documentation is in ftmodapi.h */
- FT_EXPORT_DEF( void )
- FT_Add_Default_Modules( FT_Library library )
- {
- FT_Error error;
- const FT_Module_Class* const* cur;
- /* test for valid `library' delayed to FT_Add_Module() */
- cur = ft_default_modules;
- while ( *cur )
- {
- error = FT_Add_Module( library, *cur );
- /* notify errors, but don't stop */
- if ( error )
- {
- FT_ERROR(( "FT_Add_Default_Module: Cannot install `%s', error = 0x%xn",
- (*cur)->module_name, error ));
- }
- cur++;
- }
- }
- /* documentation is in freetype.h */
- FT_EXPORT_DEF( FT_Error )
- FT_Init_FreeType( FT_Library *alibrary )
- {
- FT_Error error;
- FT_Memory memory;
- /* First of all, allocate a new system object -- this function is part */
- /* of the system-specific component, i.e. `ftsystem.c'. */
- memory = FT_New_Memory();
- if ( !memory )
- {
- FT_ERROR(( "FT_Init_FreeType: cannot find memory managern" ));
- return FT_Err_Unimplemented_Feature;
- }
- /* build a library out of it, then fill it with the set of */
- /* default drivers. */
- error = FT_New_Library( memory, alibrary );
- if ( error )
- FT_Done_Memory( memory );
- else
- {
- (*alibrary)->version_major = FREETYPE_MAJOR;
- (*alibrary)->version_minor = FREETYPE_MINOR;
- (*alibrary)->version_patch = FREETYPE_PATCH;
- FT_Add_Default_Modules( *alibrary );
- }
- return error;
- }
- /* documentation is in freetype.h */
- FT_EXPORT_DEF( FT_Error )
- FT_Done_FreeType( FT_Library library )
- {
- if ( library )
- {
- FT_Memory memory = library->memory;
- /* Discard the library object */
- FT_Done_Library( library );
- /* discard memory manager */
- FT_Done_Memory( memory );
- }
- return FT_Err_Ok;
- }
- /* END */